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  Subjects -> ENGINEERING (Total: 2266 journals)
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ENGINEERING (1197 journals)                  1 2 3 4 5 6 | Last

Showing 1 - 200 of 1205 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 7)
3D Research     Hybrid Journal   (Followers: 19)
AAPG Bulletin     Full-text available via subscription   (Followers: 5)
AASRI Procedia     Open Access   (Followers: 14)
Abstract and Applied Analysis     Open Access   (Followers: 3)
Aceh International Journal of Science and Technology     Open Access   (Followers: 2)
ACS Nano     Full-text available via subscription   (Followers: 207)
Acta Geotechnica     Hybrid Journal   (Followers: 6)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 1)
Acta Scientiarum. Technology     Open Access   (Followers: 3)
Acta Universitatis Cibiniensis. Technical Series     Open Access  
Active and Passive Electronic Components     Open Access   (Followers: 7)
Adaptive Behavior     Hybrid Journal   (Followers: 10)
Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi     Open Access  
Adsorption     Hybrid Journal   (Followers: 4)
Advanced Engineering Forum     Full-text available via subscription   (Followers: 4)
Advanced Science     Open Access   (Followers: 4)
Advanced Science Focus     Free   (Followers: 3)
Advanced Science Letters     Full-text available via subscription   (Followers: 4)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 6)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 17)
Advances in Artificial Neural Systems     Open Access   (Followers: 3)
Advances in Calculus of Variations     Hybrid Journal   (Followers: 2)
Advances in Catalysis     Full-text available via subscription   (Followers: 5)
Advances in Complex Systems     Hybrid Journal   (Followers: 7)
Advances in Engineering Software     Hybrid Journal   (Followers: 25)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 14)
Advances in Fuzzy Systems     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 9)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 18)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 22)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 7)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 28)
Advances in Operations Research     Open Access   (Followers: 11)
Advances in OptoElectronics     Open Access   (Followers: 5)
Advances in Physics Theories and Applications     Open Access   (Followers: 13)
Advances in Polymer Science     Hybrid Journal   (Followers: 40)
Advances in Porous Media     Full-text available via subscription   (Followers: 4)
Advances in Remote Sensing     Open Access   (Followers: 34)
Advances in Science and Research (ASR)     Open Access   (Followers: 6)
Aerobiologia     Hybrid Journal   (Followers: 1)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 4)
AIChE Journal     Hybrid Journal   (Followers: 28)
Ain Shams Engineering Journal     Open Access   (Followers: 5)
Akademik Platform Mühendislik ve Fen Bilimleri Dergisi     Open Access  
Alexandria Engineering Journal     Open Access  
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 28)
American Journal of Engineering and Applied Sciences     Open Access   (Followers: 11)
American Journal of Engineering Education     Open Access   (Followers: 9)
American Journal of Environmental Engineering     Open Access   (Followers: 16)
American Journal of Industrial and Business Management     Open Access   (Followers: 23)
Analele Universitatii Ovidius Constanta - Seria Chimie     Open Access  
Annals of Combinatorics     Hybrid Journal   (Followers: 3)
Annals of Pure and Applied Logic     Open Access   (Followers: 2)
Annals of Regional Science     Hybrid Journal   (Followers: 7)
Annals of Science     Hybrid Journal   (Followers: 7)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2)
Applicable Analysis: An International Journal     Hybrid Journal   (Followers: 1)
Applied Catalysis A: General     Hybrid Journal   (Followers: 5)
Applied Catalysis B: Environmental     Hybrid Journal   (Followers: 6)
Applied Clay Science     Hybrid Journal   (Followers: 4)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 12)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 3)
Applied Nanoscience     Open Access   (Followers: 8)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Physics Research     Open Access   (Followers: 4)
Applied Sciences     Open Access   (Followers: 3)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 4)
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 5)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 4)
Archives of Foundry Engineering     Open Access  
Archives of Thermodynamics     Open Access   (Followers: 8)
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
ASEE Prism     Full-text available via subscription   (Followers: 2)
Asian Engineering Review     Open Access  
Asian Journal of Applied Science and Engineering     Open Access   (Followers: 1)
Asian Journal of Applied Sciences     Open Access   (Followers: 2)
Asian Journal of Biotechnology     Open Access   (Followers: 7)
Asian Journal of Control     Hybrid Journal  
Asian Journal of Current Engineering & Maths     Open Access  
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 9)
Assembly Automation     Hybrid Journal   (Followers: 2)
at - Automatisierungstechnik     Hybrid Journal   (Followers: 1)
ATZagenda     Hybrid Journal  
ATZextra worldwide     Hybrid Journal  
Australasian Physical & Engineering Sciences in Medicine     Hybrid Journal   (Followers: 1)
Australian Journal of Multi-Disciplinary Engineering     Full-text available via subscription   (Followers: 2)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 7)
Avances en Ciencias e Ingeniería     Open Access  
Balkan Region Conference on Engineering and Business Education     Open Access   (Followers: 1)
Bangladesh Journal of Scientific and Industrial Research     Open Access  
Basin Research     Hybrid Journal   (Followers: 3)
Batteries     Open Access   (Followers: 3)
Bautechnik     Hybrid Journal   (Followers: 1)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 24)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 3)
BER : Manufacturing Survey : Full Survey     Full-text available via subscription   (Followers: 2)
BER : Motor Trade Survey     Full-text available via subscription   (Followers: 1)
BER : Retail Sector Survey     Full-text available via subscription   (Followers: 2)
BER : Retail Survey : Full Survey     Full-text available via subscription   (Followers: 2)
BER : Survey of Business Conditions in Manufacturing : An Executive Summary     Full-text available via subscription   (Followers: 3)
BER : Survey of Business Conditions in Retail : An Executive Summary     Full-text available via subscription   (Followers: 3)
Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP)     Open Access   (Followers: 1)
Biofuels Engineering     Open Access  
Biointerphases     Open Access   (Followers: 1)
Biomaterials Science     Full-text available via subscription   (Followers: 8)
Biomedical Engineering     Hybrid Journal   (Followers: 16)
Biomedical Engineering and Computational Biology     Open Access   (Followers: 13)
Biomedical Engineering Letters     Hybrid Journal   (Followers: 5)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 16)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 31)
Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 5)
Biomedical Microdevices     Hybrid Journal   (Followers: 8)
Biomedical Science and Engineering     Open Access   (Followers: 4)
Biomedizinische Technik - Biomedical Engineering     Hybrid Journal  
Biomicrofluidics     Open Access   (Followers: 4)
BioNanoMaterials     Hybrid Journal   (Followers: 1)
Biotechnology Progress     Hybrid Journal   (Followers: 39)
Boletin Cientifico Tecnico INIMET     Open Access  
Botswana Journal of Technology     Full-text available via subscription  
Boundary Value Problems     Open Access   (Followers: 1)
Brazilian Journal of Science and Technology     Open Access   (Followers: 2)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 10)
Bulletin of Canadian Petroleum Geology     Full-text available via subscription   (Followers: 14)
Bulletin of Engineering Geology and the Environment     Hybrid Journal   (Followers: 3)
Bulletin of the Crimean Astrophysical Observatory     Hybrid Journal  
Cahiers, Droit, Sciences et Technologies     Open Access  
Calphad     Hybrid Journal  
Canadian Geotechnical Journal     Full-text available via subscription   (Followers: 14)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 40)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 7)
Case Studies in Thermal Engineering     Open Access   (Followers: 4)
Catalysis Communications     Hybrid Journal   (Followers: 6)
Catalysis Letters     Hybrid Journal   (Followers: 3)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 8)
Catalysis Science and Technology     Free   (Followers: 6)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysis Today     Hybrid Journal   (Followers: 5)
CEAS Space Journal     Hybrid Journal  
Cellular and Molecular Neurobiology     Hybrid Journal   (Followers: 4)
Central European Journal of Engineering     Hybrid Journal   (Followers: 1)
CFD Letters     Open Access   (Followers: 6)
Chaos : An Interdisciplinary Journal of Nonlinear Science     Hybrid Journal   (Followers: 2)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 3)
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 2)
Chinese Journal of Engineering     Open Access   (Followers: 2)
Chinese Science Bulletin     Open Access   (Followers: 1)
Ciencia e Ingenieria Neogranadina     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencias Holguin     Open Access   (Followers: 1)
CienciaUAT     Open Access  
Cientifica     Open Access  
CIRP Annals - Manufacturing Technology     Full-text available via subscription   (Followers: 10)
CIRP Journal of Manufacturing Science and Technology     Full-text available via subscription   (Followers: 13)
City, Culture and Society     Hybrid Journal   (Followers: 20)
Clay Minerals     Full-text available via subscription   (Followers: 9)
Clean Air Journal     Full-text available via subscription   (Followers: 2)
Coal Science and Technology     Full-text available via subscription   (Followers: 4)
Coastal Engineering     Hybrid Journal   (Followers: 10)
Coastal Engineering Journal     Hybrid Journal   (Followers: 3)
Coatings     Open Access   (Followers: 2)
Cogent Engineering     Open Access   (Followers: 2)
Cognitive Computation     Hybrid Journal   (Followers: 4)
Color Research & Application     Hybrid Journal   (Followers: 1)
COMBINATORICA     Hybrid Journal  
Combustion Theory and Modelling     Hybrid Journal   (Followers: 13)
Combustion, Explosion, and Shock Waves     Hybrid Journal   (Followers: 13)
Communications Engineer     Hybrid Journal   (Followers: 1)
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Components, Packaging and Manufacturing Technology, IEEE Transactions on     Hybrid Journal   (Followers: 23)
Composite Interfaces     Hybrid Journal   (Followers: 5)
Composite Structures     Hybrid Journal   (Followers: 241)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 174)
Composites Part B : Engineering     Hybrid Journal   (Followers: 215)
Composites Science and Technology     Hybrid Journal   (Followers: 160)
Comptes Rendus Mécanique     Full-text available via subscription   (Followers: 2)
Computation     Open Access  
Computational Geosciences     Hybrid Journal   (Followers: 12)
Computational Optimization and Applications     Hybrid Journal   (Followers: 7)
Computational Science and Discovery     Full-text available via subscription   (Followers: 2)
Computer Applications in Engineering Education     Hybrid Journal   (Followers: 6)
Computer Science and Engineering     Open Access   (Followers: 17)
Computers & Geosciences     Hybrid Journal   (Followers: 25)
Computers & Mathematics with Applications     Full-text available via subscription   (Followers: 5)
Computers and Electronics in Agriculture     Hybrid Journal   (Followers: 4)
Computers and Geotechnics     Hybrid Journal   (Followers: 8)
Computing and Visualization in Science     Hybrid Journal   (Followers: 6)
Computing in Science & Engineering     Full-text available via subscription   (Followers: 25)
Conciencia Tecnologica     Open Access  
Concurrent Engineering     Hybrid Journal   (Followers: 3)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 6)
Control and Dynamic Systems     Full-text available via subscription   (Followers: 7)
Control Engineering Practice     Hybrid Journal   (Followers: 40)
Control Theory and Informatics     Open Access   (Followers: 7)
Corrosion Science     Hybrid Journal   (Followers: 24)
CT&F Ciencia, Tecnologia y Futuro     Open Access  
CTheory     Open Access  
Current Applied Physics     Full-text available via subscription   (Followers: 4)

        1 2 3 4 5 6 | Last

Journal Cover CIRP Annals - Manufacturing Technology
  [SJR: 2.207]   [H-I: 99]   [10 followers]  Follow
   Full-text available via subscription Subscription journal  (Not entitled to full-text)
   ISSN (Print) 0007-8506
   Published by Elsevier Homepage  [3043 journals]
  • Modelling of specific energy requirements in machining as a function of
           tool and lubricoolant usage
    • Authors: Paolo C. Priarone; Matteo Robiglio; Luca Settineri; Vincenzo Tebaldo
      Pages: 25 - 28
      Abstract: Publication date: Available online 2 June 2016
      Source:CIRP Annals - Manufacturing Technology
      Author(s): Paolo C. Priarone, Matteo Robiglio, Luca Settineri, Vincenzo Tebaldo
      Energy consumption is a key player in material removal processes. Models for estimating the specific energy consumption or for computing the total direct energy requirements have been developed to date. This paper proposes a comprehensive model for the system-level energy analysis of machining processes, which includes all the activities related to workpiece material production, material removal, tool and cutting fluid production and usage. The application of the model to the turning of a Ti–6Al–4V alloy (under wet, MQL, and dry cutting conditions) is discussed. The results allow the identification of the optimum process parameters for energy footprint minimization.

      PubDate: 2016-06-17T18:05:40Z
      DOI: 10.1016/j.cirp.2016.04.108
      Issue No: Vol. 65, No. 1 (2016)
  • Impact reduction potential by usage anticipation under comfort trade-off
    • Authors: Joost R. Duflou; Andres Auquilla; Yannick De Bock; Ann Nowé; Karel Kellens
      Pages: 33 - 36
      Abstract: Publication date: Available online 1 June 2016
      Source:CIRP Annals - Manufacturing Technology
      Author(s): Joost R. Duflou, Andres Auquilla, Yannick De Bock, Ann Nowé, Karel Kellens
      Well-optimized intelligent control of products and systems with a substantial energy and/or consumables demand can allow to reduce the use phase impact of these devices and systems significantly. However, depending on the usage patterns and their variability, the system efficiency and tardiness, as well as comfort-impact avoidance trade-off considerations, the effectiveness of such strategies can greatly differ. This contribution describes models for and analyses the sensitivity of the achievable impact reduction with respect to these factors, thus facilitating use phase oriented eco-design decision making. The observations are illustrated by means of a zone heating and a laser cutting machine case study.

      PubDate: 2016-06-17T18:05:40Z
      DOI: 10.1016/j.cirp.2016.04.087
      Issue No: Vol. 65, No. 1 (2016)
  • A decision support system to manage the quality of End-of-Life products in
           disassembly systems
    • Authors: Marcello Colledani; Olga Battaïa
      Pages: 41 - 44
      Abstract: Publication date: Available online 14 June 2016
      Source:CIRP Annals - Manufacturing Technology
      Author(s): Marcello Colledani, Olga Battaïa
      The quality of post-consumer products is one of the major sources of uncertainty in disassembly systems. This paper develops a methodology to design disassembly lines under variability of the End-of-Life product quality, with the objective to maximize the profit. This decision support system helps to take decisions about the depth of disassembly and the organization of the disassembly system, depending on the pre-process measurement of the key quality characteristics of the product to be disassembled. The industrial benefits are demonstrated in a real industrial case focused on the remanufacturing of mechatronic parts in the automotive industry.

      PubDate: 2016-06-17T18:05:40Z
      DOI: 10.1016/j.cirp.2016.04.121
      Issue No: Vol. 65, No. 1 (2016)
  • Mechanism of Cutting Elastomers with Cryogenic Cooling
    • Authors: Matthias Putz; Martin Dix; Mike Neubert; Torsten Schmidt
      Pages: 73 - 76
      Abstract: Publication date: Available online 11 June 2016
      Source:CIRP Annals - Manufacturing Technology
      Author(s): Matthias Putz, Martin Dix, Mike Neubert, Torsten Schmidt
      Machining of elastomers offers more flexibility of product shape in comparison to the common compression moulding, especially for small batch series. In this context the entropy-elastic behaviour of the material with low Young's modulus is the main barrier for high-quality manufacturing. This material behaviour could be temporarily adapted by cryogenic cooling for precise cutting. In this article, the different mechanisms, e.g. forces, friction and separation procedures, are analysed for elastomers with different material behaviours. Different chip formation mechanisms are shown in comparison to metal machining. As a result, the friction (μ ≈1) between work piece, chip and tool dominates. An analytic chip formation model has been applied.

      PubDate: 2016-06-17T18:05:40Z
      DOI: 10.1016/j.cirp.2016.04.075
      Issue No: Vol. 65, No. 1 (2016)
  • Deformation of thin parts in micromilling
    • Authors: Ismail Lazoglu; Ali Mamedov
      Pages: 117 - 120
      Abstract: Publication date: Available online 2 June 2016
      Source:CIRP Annals - Manufacturing Technology
      Author(s): Ismail Lazoglu, Ali Mamedov
      Deformation is one of the major problems in the micromilling of thin parts. Deformation of thin parts is mainly due to the machining induced residual stresses remained in the part and directly affects the dimensions and form tolerances of microparts. Therefore, this article proposes a new modeling approach to predict deformation of thin parts in micromachining. In the modeling approach, micromilling induced mechanical and thermal loads on the workpiece are estimated, and a new multi-physics based finite element modeling (FEM) approach is proposed to predict thin part deformation in micromilling for the first time. The newly developed deformation model is validated under various cutting conditions in the micromilling of Ti–6Al–4V.

      PubDate: 2016-06-17T18:05:40Z
      DOI: 10.1016/j.cirp.2016.04.077
      Issue No: Vol. 65, No. 1 (2016)
  • New abrasive deburring method using suction for micro burrs at
           intersecting holes
    • Authors: B.C. Kwon; K.H. Kim; K.H. Kim; S.L. Ko
      Pages: 145 - 148
      Abstract: Publication date: Available online 16 June 2016
      Source:CIRP Annals - Manufacturing Technology
      Author(s): B.C. Kwon, K.H. Kim, K.H. Kim, S.L. Ko
      As industrial technology advances functionally, there is an increasing necessity to treat edges of products well to satisfy the required function. Specifically, burrs inside products at intersecting holes are very difficult to remove because the accessibility of the burr location inside the product to tools is very limited. We propose a new deburring method called abrasive deburring. This method uses a pipe with a hole as a deburring tool to move water with an abrasive and a pump for suction. To determine the suitability of the proposed deburring method, abrasives with different sizes and specific gravities are used. The geometry of the tool and the operating conditions were specified using the following parameters: the diameter of the crossing hole, the diameter of the suction tool, the gap between the sample hole and the tool, the pressure of the pump, and the location of the hole of the tool. The suction-deburring method was very useful for removing micro burrs formed at intersecting holes with an appropriate pump pressure, which is not as high as that in the water-jet or extrude-hone method. However, given the limited deburring force, the method is only applicable for removing micro burrs; other burrs are reduced to stable burrs, which do not require removal from the product.

      PubDate: 2016-06-17T18:05:40Z
      DOI: 10.1016/j.cirp.2016.04.085
      Issue No: Vol. 65, No. 1 (2016)
  • Corrigendum to “Comparison of conventional drilling and orbital drilling
           in machining carbon fibre reinforced plastics (CFRP)” [CIRP Ann. Manuf.
           Technol. 65 (2016) 137–140]
    • Abstract: Publication date: Available online 21 August 2016
      Source:CIRP Annals - Manufacturing Technology
      Author(s): Robert Voss, Marcel Henerichs, Friedrich Kuster

      PubDate: 2016-10-16T13:02:50Z
  • Process chains for high-precision components with micro-scale features
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 2
      Author(s): E. Uhlmann, B. Mullany, D. Biermann, K.P. Rajurkar, T. Hausotte, E. Brinksmeier
      This keynote paper addresses the manufacturing of high-precision components with micro-scale features, and the associated process chain considerations. Three workpiece classifications as well as a micro-production process chain (MPPC) model are defined. A review of capabilities and advances in micro-manufacturing technologies, metrology, and equipment demonstrates increased versatility across varied applications, while also highlighting limitations. Challenges in the development of process chains are presented using results of the MPPC program of the Collaborative Working Group on Micro-Production Engineering. Finally, a guide for machining high-precision components with micro-scale features in process chains is given with respect to machine tools, tools, technology and environmental conditions.

      PubDate: 2016-10-16T13:02:50Z
  • Closed-loop control of product properties in metal forming
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 2
      Author(s): J.M. Allwood, S.R. Duncan, J. Cao, P. Groche, G. Hirt, B. Kinsey, T. Kuboki, M. Liewald, A. Sterzing, A.E. Tekkaya
      Metal forming processes operate in conditions of uncertainty due to parameter variation and imperfect understanding. This uncertainty leads to a degradation of product properties from customer specifications, which can be reduced by the use of closed-loop control. A framework of analysis is presented for understanding closed-loop control in metal forming, allowing an assessment of current and future developments in actuators, sensors and models. This leads to a survey of current and emerging applications across a broad spectrum of metal forming processes, and a discussion of likely developments.

      PubDate: 2016-10-16T13:02:50Z
  • Abrasive fine-finishing technology
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 2
      Author(s): Fukuo Hashimoto, Hitomi Yamaguchi, Peter Krajnik, Konrad Wegener, Rahul Chaudhari, Hans-Werner Hoffmeister, Friedrich Kuster
      Abrasive fine-finishing technology is often applied as a final finishing process, and the selection of the right technology is crucial to obtaining the desired performance of functions such as fatigue life. This paper begins with classifications of the technology along with fundamentals and brief histories of the individual methods. The material removal mechanisms, specific energies, and finishing characteristics of the various technologies are summarized giving assessments of the surfaces created by them. Guidelines developed for selecting the appropriate methods, and case studies illustrate the effectiveness of various methods. This paper ends with a discussion of the future prospects of the technology.

      PubDate: 2016-10-16T13:02:50Z
  • Cyber-physical systems in manufacturing
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 2
      Author(s): L. Monostori, B. Kádár, T. Bauernhansl, S. Kondoh, S. Kumara, G. Reinhart, O. Sauer, G. Schuh, W. Sihn, K. Ueda
      One of the most significant advances in the development of computer science, information and communication technologies is represented by the cyber-physical systems (CPS). They are systems of collaborating computational entities which are in intensive connection with the surrounding physical world and its on-going processes, providing and using, at the same time, data-accessing and data-processing services available on the Internet. Cyber-physical production systems (CPPS), relying on the latest, and the foreseeable further developments of computer science, information and communication technologies on one hand, and of manufacturing science and technology, on the other, may lead to the 4th industrial revolution, frequently noted as Industrie 4.0. The paper underlines that there are significant roots in general – and in particular to the CIRP community – which point towards CPPS. Expectations towards research in and implementation of CPS and CPPS are outlined and some case studies are introduced. Related new R&D challenges are highlighted.

      PubDate: 2016-10-16T13:02:50Z
  • Advances in Large-Scale Metrology – Review and future trends
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 2
      Author(s): R.H. Schmitt, M. Peterek, E. Morse, W. Knapp, M. Galetto, F. Härtig, G. Goch, B. Hughes, A. Forbes, W.T. Estler
      The field of Large-Scale Metrology has been studied extensively for many decades and represents the combination and competition of topics as diverse as geodesy and laboratory calibration. A primary reason that Large-Scale Metrology continues to represent the research frontier is that technological advances introduced and perfected at a conventional scale face additional challenges which increase non-linearly with size. This necessitates new ways of considering the entire measuring process, resulting in the application of concepts such as virtual measuring processes and cyber-physical systems. This paper reports on the continuing evolution of Large-Scale Metrology.

      PubDate: 2016-10-16T13:02:50Z
  • Continuous maintenance and the future – Foundations and
           technological challenges
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 2
      Author(s): R. Roy, R. Stark, K. Tracht, S. Takata, M. Mori
      High value and long life products require continuous maintenance throughout their life cycle to achieve required performance with optimum through-life cost. This paper presents foundations and technologies required to offer the maintenance service. Component and system level degradation science, assessment and modelling along with life cycle ‘big data’ analytics are the two most important knowledge and skill base required for the continuous maintenance. Advanced computing and visualisation technologies will improve efficiency of the maintenance and reduce through-life cost of the product. Future of continuous maintenance within the Industry 4.0 context also identifies the role of IoT, standards and cyber security.

      PubDate: 2016-10-16T13:02:50Z
  • The role of manufacturing in affecting the social dimension of
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 2
      Author(s): John W. Sutherland, Justin S. Richter, Margot J. Hutchins, David Dornfeld, Rachel Dzombak, Jennifer Mangold, Stefanie Robinson, Michael Z. Hauschild, Alexandra Bonou, Paul Schönsleben, Felix Friemann
      Manufacturing affects all three dimensions of sustainability: economy, environment, and society. This paper addresses the last of these dimensions. It explores social impacts identified by national level social indicators, frameworks, and principles. The effects of manufacturing on social performance are framed for different stakeholder groups with associated social needs. Methodology development as well as various challenges for social life cycle assessment (S-LCA) are further examined. Efforts to integrate social and another dimension of sustainability are considered, with attention to globalization challenges, including offshoring and reshoring. The paper concludes with a summary of key takeaways and promising directions for future work.

      PubDate: 2016-10-16T13:02:50Z
  • Cryogenic manufacturing processes
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 2
      Author(s): I.S. Jawahir, H. Attia, D. Biermann, J. Duflou, F. Klocke, D. Meyer, S.T. Newman, F. Pusavec, M. Putz, J. Rech, V. Schulze, D. Umbrello
      Cryogenically assisted manufacturing processes are emerging as environmentally-benign, toxic-free, hazardless operations, producing functionally superior products. This paper presents an overview of major cryogenic manufacturing processes, summarizing the state-of-the-art and significant developments during the last few decades. It begins with a summary of historic perspectives, including definitions, scope, and proceeds to analysis of process mechanics and material performance covering tribological and thermo-mechanical interactions, followed by surface integrity, product quality and performance in cryogenic manufacturing. Process analysis and applications includes machining, forming and grinding. Economic, safety and health issues are then discussed. Finally, progress in developing predictive performance models and future outlook are presented.

      PubDate: 2016-10-16T13:02:50Z
  • Design for Additive Manufacturing: Trends, opportunities, considerations,
           and constraints
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 2
      Author(s): Mary Kathryn Thompson, Giovanni Moroni, Tom Vaneker, Georges Fadel, R. Ian Campbell, Ian Gibson, Alain Bernard, Joachim Schulz, Patricia Graf, Bhrigu Ahuja, Filomeno Martina
      The past few decades have seen substantial growth in Additive Manufacturing (AM) technologies. However, this growth has mainly been process-driven. The evolution of engineering design to take advantage of the possibilities afforded by AM and to manage the constraints associated with the technology has lagged behind. This paper presents the major opportunities, constraints, and economic considerations for Design for Additive Manufacturing. It explores issues related to design and redesign for direct and indirect AM production. It also highlights key industrial applications, outlines future challenges, and identifies promising directions for research and the exploitation of AM's full potential in industry.

      PubDate: 2016-10-16T13:02:50Z
  • Shaping of engineering ceramics by electro, chemical and physical
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 2
      Author(s): Eleonora Ferraris, Jef Vleugels, Yuebin Guo, David Bourell, Jean Pierre Kruth, Bert Lauwers
      Thanks to the favourable combination of outstanding mechanical, thermal and chemical properties, engineering ceramics find widespread applications in the modern industry. Nevertheless, their extensive use is still hindered by the implementation of a labour and cost intensive manufacturing chain. Electro, chemical and physical shaping techniques, like electrical discharge machining, additive manufacturing and laser beam machining, have recently been investigated to offer efficient alternatives. This work provides a comprehensive overview of the current technological trends and main perspectives on electro, chemical and physical shaping of engineering ceramics with a focus on experimental works. The literature data trace back to the 80s.

      PubDate: 2016-10-16T13:02:50Z
  • Chatter suppression techniques in metal cutting
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 2
      Author(s): J. Munoa, X. Beudaert, Z. Dombovari, Y. Altintas, E. Budak, C. Brecher, G. Stepan
      The self-excited vibration, called chatter, is one of the main limitations in metal removal processes. Chatter may spoil the surface of the part and can also cause large reduction in the life of the different components of the machine tool including the cutting tool itself. During the last 60 years, several techniques have been proposed to suppress chatter. This keynote paper presents a critical review of the different chatter suppression techniques. Process solutions with design and control approaches are compiled to provide a complete view of the available methods to stabilize the cutting process. The evolution of each technique is described remarking the most important milestones in research and the corresponding industrial application. The selection of the most appropriate technique for each specific chatter problem is also discussed considering various aspects of machining processes.

      PubDate: 2016-10-16T13:02:50Z
  • Surface modification by machine hammer peening and burnishing
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 2
      Author(s): V. Schulze, F. Bleicher, P. Groche, Y.B. Guo, Y.S. Pyun
      A wide range of surface modification processes has been developed over the past decades. Beside the well-established processes such as shot peening, there are other emerging surface modification processes such as machine hammer peening with a potential of applications that still needs to be evaluated. Therefore, all surface modification processes using guided tools with periodic or continuous contact to the workpiece are compared in this paper. After a classification of the processes, the paper presents a systematic description by comparing the different technologies and it explains the proposed standardized nomenclature. It identifies the relevant physical mechanisms of the surface modifications processes and it compares the influences on surface roughness, residual stresses, work hardening and microstructure. One section is dedicated to the need of an accompanying quality assurance. Furthermore, the capabilities of different process simulation approaches are analyzed with respect to process mechanisms and the resulting surface layer characteristics. The service performance such as fatigue life, corrosion resistance, friction and wear are discussed based on best practice results. Finally, the paper discusses the actual and potential applications of surface modification processes: surface strengthening, post welding treatments, smoothing of tools and molds as well as surface structuring and embedding of coating materials.

      PubDate: 2016-10-16T13:02:50Z
  • The Sustainability Cone – A holistic framework to integrate
           sustainability thinking into manufacturing
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Jan-Markus Rödger, Niki Bey, Leo Alting
      Integrating sustainability into manufacturing is a multifaceted endeavour. Global sustainability aspects and specific manufacturing success factors have to be combined with life cycle thinking in order to get the holistic view on manufacturing which is needed to make truly sustainability-oriented decisions in manufacturing. Industry, at the same time, is always deterred by possible high cost and time constraints related to implementing new approaches. Using examples from car manufacturing, this paper introduces and explains a new sustainable manufacturing framework – the Sustainability Cone – as the missing link which closes these gaps by providing necessary holistic and consistent overview while being aligned with established stage-gate project execution models, thus ensuring practical applicability as shown for a highly automated production cell. The paper shows how to apply life cycle target thinking, as essential part of the Sustainability Cone, derived from customer-demanded functionality down to a production system.

      PubDate: 2016-10-16T13:02:50Z
  • Sustainability Cockpit: An integrated tool for continuous assessment and
           improvement of sustainability in manufacturing
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Wen Li, Samira Alvandi, Sami Kara, Sebastian Thiede, Christoph Herrmann
      Sustainability assessment needs to be embedded into manufacturers’ daily operations for continuous improvement. Existing factories, especially small and medium enterprises (SMEs), often lack infrastructure and capital to enable such regular assessment. An integrated tool has been developed based on a generic discrete event simulation (DES) factory model, which is linked to the company's resource planning system in order to not only assess the sustainability performance of each company's as-is operations, but also optimise their future performance. An Australian company was used as a case study to demonstrate the validity of the tool.

      PubDate: 2016-10-16T13:02:50Z
  • A hybrid group leader algorithm for green material selection with energy
           consideration in product design
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): F. Tao, L.N. Bi, Y. Zuo, A.Y.C. Nee
      Green material selection with energy-consideration (GMS-EC) in product design is a key issue for realizing green and sustainable manufacturing. In this paper, a comprehensive optimization model for GMS-EC is established. A hybrid optimizing method named chaos quantum group leader algorithm (CQGLA) is designed to obtain the optimal energy-consumption solution in designing products with various complexity. Compared with genetic algorithm (GA), group leader algorithm (GLA) and artificial bee colony algorithm (ABCA), it is observed that CQGLA can perform better in terms of speed, search capability and solution quality.

      PubDate: 2016-10-16T13:02:50Z
  • Natural fibre selection for composite eco-design
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Andrea Corona, Bo Madsen, Michael Zwicky Hauschild, Morten Birkved
      Natural fibre composites (NFC) are gaining interest in manufacturing because they address some of the environmental problems of traditional composites: use of non-renewable resources, and large impacts related to their production and disposal. Since natural fibres are not yet optimized for composite production, it is crucial to identify the most appropriate applications, and determine the optimal fibre/matrix ratio. A methodology is proposed for early-stage decisions support on selection of bio-composite materials. Results help identify the application with the largest reduction in environmental burden and show that the fibre/matrix combination with the lowest environmental burden also has the best mechanical properties.

      PubDate: 2016-10-16T13:02:50Z
  • Batch scheduling for minimal energy consumption and tardiness under
           uncertainties: A heat treatment application
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Junkai Wang, Fei Qiao, Fu Zhao, John W. Sutherland
      A novel multiple-objective model for batch scheduling of an energy-intensive manufacturing process, e.g., heat treatment, is proposed. The model minimizes energy consumption and total weighted tardiness while considering the arrival times of each workpiece and the inherent uncertainties in gas heating values, processing times, and due dates. Fuzzy logic is adopted to characterize these uncertainties and to interpret objective dominance when finding a Pareto frontier. A non-dominated sorting genetic algorithm is employed. The approach is demonstrated using a pre-treatment (soaking) process prior to a hot rolling operation. Pareto optimal performance of the model under different parameter settings is discussed.

      PubDate: 2016-10-16T13:02:50Z
  • A decision support system for waste heat recovery in manufacturing
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Alessandro Simeone, Yang Luo, Elliot Woolley, Shahin Rahimifard, Claudio Boër
      One third of energy consumption is attributable to the industrial sector, with as much as half ultimately wasted as heat. Consequently, research has focused on technologies for harvesting this waste heat energy, however, the adoption of such technologies can be costly with long payback time. A decision support tool is presented which computes the compatibility of waste heat source(s) and sink(s), namely the exergy balance and temporal availability, along with economic and environmental benefits of available heat exchanger technologies to propose a streamlined and optimised heat recovery strategy. Substantial improvement in plant energy efficiency together with reduction in the payback time for heat recovery has been demonstrated in the included case study.

      PubDate: 2016-10-16T13:02:50Z
  • Comparative environmental impacts of additive and subtractive
           manufacturing technologies
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Henri Paris, Hossein Mokhtarian, Eric Coatanéa, Matthieu Museau, Inigo Flores Ituarte
      Additive manufacturing technologies are opening new opportunities in term of production paradigm and manufacturing possibilities. Nevertheless, in term of environmental impact analysis supplementary research works require to be made in order to compare and evaluate them with traditional manufacturing processes. In this article, we propose to use Life Cycle Assessment (LCA) method and to associate decision criteria to support the selection of manufacturing strategies for an aeronautic turbine. The dimensionless criteria allow to define environmental trade-offs between additive and subtractive methods. This study provides an approach generalizable to other parts and processes.

      PubDate: 2016-10-16T13:02:50Z
  • Condition based renewal and maintenance integrated planning
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Hiroki Iijima, Shozo Takata
      From the perspective of facility life cycle management, timely renewal and appropriate maintenance are important to minimizing life cycle cost and environmental loads. To determine whether a system should be renewed or the components replaced or repaired, we need to assess the condition and residual life of the items. This paper proposes a method for selecting the optimal treatment from among the following options: doing nothing, component replacement, and system renewal. This method takes into consideration the facility conditions and operation status identified through monitoring data, as well as the operation and maintenance history. The method was verified by application to the multi-split-type air-conditioning system of a commercial building.

      PubDate: 2016-10-16T13:02:50Z
  • High voltage fragmentation and mechanical recycling of glass fibre
           thermoset composite
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Paul T. Mativenga, Norshah A. Shuaib, Jack Howarth, Fadri Pestalozzi, Jörg Woidasky
      Global increase of composite waste urgently requires innovative recycling technology. The three dimensional cross-linked structure makes melting and remoulding of thermoset composite impossible. In this study, high voltage fragmentation, originally conceived for fracturing rocks was investigated as a potential process for composite recycling. It was then benchmarked against its competitor, mechanical recycling. The investigation covered effectiveness in separating composite phases, energy demand and recyclate quality. The work is a new contribution to the performance evaluation of key technologies for rapid recycling glass fibre thermoset composites, a major challenge for manufacturing and end-of-life product waste.

      PubDate: 2016-10-16T13:02:50Z
  • A new method for combining handling systems with passive orientation
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Gunnar Borchert, Annika Raatz
      The development of flexible and cost-saving handling systems is within the scope of ongoing research. In the present work, a parallel robot is extended with a passive orientation device to enhance its mobility. Additional actuators, which are usually used for active orientation, are deliberately excluded to reduce costs and weight. Passive motions are thus caused by accelerations of the parallel robot in conjunction with the inertia coupling between both structures. This contribution presents methods to connect the control of the orientation device with the overlaid handling task. Validation of the process is done in simulation and experimentally.

      PubDate: 2016-10-16T13:02:50Z
  • Model based design of process-specific handling tools for workpieces with
           many variants in shape and material
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Klaus Dröder, Franz Dietrich, Christian Löchte, Jürgen Hesselbach
      A major driver for competition in end-consumer markets is product individualization with regard to functionalities, shape and design. This trend calls for more flexible and versatile production systems. In anticipation of this challenge a new concept for form-flexible handling devices is proposed. It involves a vacuum system in combination with a gripper cushion that is filled with granules. The novel working principle demands a model based design to realize a fast process integration. The feasibility of this concept and the design process are shown in a preforming process. Benefits of such handling tools in versatile production systems are discussed.

      PubDate: 2016-10-16T13:02:50Z
  • A probabilistic approach to workspace sharing for human–robot
           cooperation in assembly tasks
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Stefania Pellegrinelli, Federico Lorenzo Moro, Nicola Pedrocchi, Lorenzo Molinari Tosatti, Tullio Tolio
      Recently, human–robot cooperation (HRC) research activities have focused on the development of new methodologies for the generation of safe robot trajectories. However, the applicability of such methodologies in a real context is limited due to the inherent uncertainty of robot trajectory execution time (i.e. the robot can avoid the worker by modifying its velocity along the path). This paper proposes an approach to estimate a confidence interval on robot trajectory execution time for scenarios in which human–robot space sharing is required. First, human arm movements are studied for a given set of assembly collaborative tasks: worker occupancy volumes and occupancy volume probabilities are derived. Then, a finite number of alternative robot trajectories, crossing human occupancy volumes with different occupancy probabilities, are generated. It is therefore possible to estimate a probability for the robot to reduce its velocity, and a confidence interval on the robot execution time. The application on a real assembly case is discussed.

      PubDate: 2016-10-16T13:02:50Z
  • Augmented reality system for operator support in human–robot
           collaborative assembly
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Sotiris Makris, Panagiotis Karagiannis, Spyridon Koukas, Aleksandros-Stereos Matthaiakis
      This paper presents the design and implementation of an augmented reality (AR) tool in aid of operators being in a hybrid, human and robot collaborative industrial environment. The system aims to provide production and process related information as well as to enhance the operators’ immersion in the safety mechanisms, dictated by the collaborative workspace. The developed system has been integrated with a service based station controller, which is responsible for orchestrating the flow of information to the operator, according to the task execution status. The tool has been applied to a case study from the automotive sector, resulting in an enhanced operator's integration with the assembly process.

      PubDate: 2016-10-16T13:02:50Z
  • Coil winding process modelling with deformation based wire tension
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Florian Sell-Le Blanc, Janna Hofmann, Rico Simmler, Juergen Fleischer
      For electric motors, the stator designs with tooth coils are predominant. Due to their noncircular shape, the tooth coils display a challenge for highly productive winding processes with a low coil resistance. With the use of a process model a prediction of the central process parameters, like the wire tension, can be achieved. This model consists of a wire deformation based multi-body-dynamic simulation, measurements and analytic model aspects which were validated at a test stand. It can be used to optimize controller and actuator designs for wire tension control systems and enables higher winding speeds and winding quality.

      PubDate: 2016-10-16T13:02:50Z
  • A mechanics-based predictive model for chip breaking in metal machining
           and its validation
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): S. Buchkremer, J. Schoop
      In metal cutting, effective chip breaking enables efficient chip removal, prevents workpiece and tool damage, and provides operational safety. Currently available cutting tool insert designs often neglect the underlying physics of chip breaking process governed by ductile fracture on the chip free-surface. This paper presents a predictive model for chip breaking in turning operations, which combines a mechanics-based model, utilizing a ductile fracture criterion, with a finite element model. Experimental validation on aluminum alloy AA7075-T6511 and brass CuZn38As shows that the impacts of the tool and process parameters on chip breakability could be accurately predicted without prior knowledge of the ductile material properties.

      PubDate: 2016-10-16T13:02:50Z
  • Analytical temperature prediction for cutting steel
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Mustapha Abouridouane, Fritz Klocke, Benjamin Döbbeler
      The generated temperatures in cutting operations decisively control the cutting mechanics, the tool life and the process performance. Therefore, several models have been developed to predict the temperatures involved in cutting processes. However, the developed models are very complex, laborious to check, and hence impractical for industrial applications. This work proposes an analytical approach to quickly and easily estimate the temperature when cutting steel. It bases on the classical shear zone theory of Oxley and the heat balancing according to Kronenberg. Orthogonal cutting tests using cemented carbide tools and finite element cutting simulations are performed to successfully validate the developed approach.

      PubDate: 2016-10-16T13:02:50Z
  • Prediction of surface integrity using Flamant–Boussinesq analytical
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Thomas Baizeau, Frédéric Rossi, Gérard Poulachon, José Carlos Outeiro
      Surface integrity prediction of hard machining using PCBN cutting tools remains a major topic for many high value added applications. A Flamant–Boussinesq (FB) analytical model has initially been applied for surface integrity prediction in orthogonal cutting. In order to extend this model to the general case of 3D cutting process, a cutting force model was developed and incorporated into the FB model. This one was then used to evaluate the plastically deformed layer thickness induced by 3D round cutting tools. It was validated by comparing the predicted plastic strains with the micro hardness distribution induced by 3D cutting tests.

      PubDate: 2016-10-16T13:02:50Z
  • Atomic migration of carbon in hard turned layers of carburized bearing
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Vikram Bedekar, Jonathan D. Poplawsky, Wei Guo, Rajiv Shivpuri, R. Scott Hyde
      Grain finement and non-equilibrium carbon segregation within grain boundaries alters the mechanical performance of hard turning layers in carburized bearing steel. An atom probe tomography (APT) study on the nanostructured hard turning layers reveals carbon migration to grain boundaries as a result of carbide decomposition during severe plastic deformation. In addition, samples exposed to different cutting speeds show that the carbon migration rate increases with the cutting speed. These two effects lead to an ultrafine carbon network structure resulting in increased hardness and thermal stability in the severely deformed surface layer.

      PubDate: 2016-10-16T13:02:50Z
  • High speed turning of Inconel 718 using PVD-coated PCBN tools
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Sein Leung Soo, Sarmad A. Khan, David K. Aspinwall, Peter Harden, Andrew L. Mantle, Gregor Kappmeyer, David Pearson, Rachid M'Saoubi
      Five different coatings and two PCBN grades were evaluated when high speed turning Inconel 718. Tool life was 40% higher when employing TiSiN coated over uncoated inserts at 200m/min. When operating at 300–450m/min however, coatings provided no appreciable benefit. Workpiece surface roughness varied between ∼0.25 and 1.05μm Ra while cutting forces were <300N. Increased workpiece microhardness and microstructural deformation were apparent with worn inserts. Medium cBN content (65%) inserts generated near surface compressive residual stresses of approximately −440MPa as opposed to values of −90MPa (measured parallel to feed) when using low cBN content (50%) tools.

      PubDate: 2016-10-16T13:02:50Z
  • The influence of built-up layer formation on cutting performance of GG25
           grey cast iron
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Paolo Fiorini, Gerry Byrne
      The success of high speed machining of grey cast iron relates to the protective built-up layer (BUL) that forms on the tool. The present work investigates BUL formation on pcBN tools for dry, high speed machining of GG25 grey cast iron (up to v c =750m/min). This work suggests that the BUL distribution on the tool at high cutting speed (v c =750m/min) is key to tool protection. Protection in the area of maximum cutting temperature is critical in preventing thermally driven wear modes, such as crater wear, found at low cutting speeds (v c =250m/min).

      PubDate: 2016-10-16T13:02:50Z
  • Reduction of built-up edge formation in machining Al- and cast iron hybrid
           components by internal cooling of cutting inserts
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Friedrich Bleicher, Christoph Pollak, Jens Brier, Anton Siller
      In parallel machining of aluminium and cast iron hybrid components, like in precision boring of crankshaft bearing bores, a tribo-chemical reaction occurs on the rake face of a cutting insert and comes along with significant built-up edge formation. Cooling strategies (external, internal) and the cutting fluid quality show significant influence. The determination of the temperature dependency of the intermetallic compound formation velocity (Fe-Si-C) gives a better understanding of this particular tribo-chemical process. An internal cooling of the cutting insert allows a reduction of the built-up edge effect by reducing the temperature on the rake face.

      PubDate: 2016-10-16T13:02:50Z
  • Effect of structure and residual stresses of diamond coated cemented
           carbide tools on the film adhesion and developed wear mechanisms in
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): G. Skordaris, K.-D. Bouzakis, P. Charalampous, T. Kotsanis, E. Bouzakis, O. Lemmer
      This article deals with the wear mechanisms of variously adherent nano-composite or multi-layer diamond coated tools in milling. The adhesion and residual stresses of these films on cemented-carbide inserts were characterized via inclined impact tests at diverse temperatures. The obtained results were evaluated through FEM-supported mathematical methods for estimating the maximum film residual stress and the shear failure stress (SFLS) of the coating–substrate interface. The coated inserts were used in milling AA7075 T6. The developed wear mechanisms were elucidated considering the film structure, the defined temperature-dependent SFLS and the FEM-determined stress and temperature distribution in the tool wedge region during cutting.

      PubDate: 2016-10-16T13:02:50Z
  • The influences of pulsed-laser-ablation and electro-discharge-grinding
           processes on the cutting performances of polycrystalline diamond
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Paul Butler-Smith, Maximilian Warhanek, Dragos Axinte, Michael Fay, Jean-Francois Bucourt, Raphael Ragueneau, Konrad Wegener
      Geometrically complex micro-tools are manufactured via processes which can affect their cutting performances. This paper studies the effects pulsed-laser-ablation and electro-discharge-grinding on polycrystalline diamond matrices and their binder phases at nanometric scales, revealing distinct differences in the resulting substructures. The dissimilarities in micro-scale material removal phenomena of these manufacturing processes combined with their effects on the generated surface topographies and cutting-edge geometries can significantly influence the wear and cutting performance of micro-drills. A study on the micro-drilling of a ceramic matrix composite workpiece material confirms that pulsed-laser-ablation of composite diamond structures offers a step-change in the fabrication of micro-tools.

      PubDate: 2016-10-16T13:02:50Z
  • The mechanics of milling of germanium for IR applications
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): J.D. Owen, J.R. Troutman, T.A. Harriman, A. Zare, Y.Q. Wang, D.A. Lucca, M.A. Davies
      Freeform germanium optics produced by single crystal diamond milling are important for infrared (IR) imaging applications. However the mechanics of interrupted cutting of germanium is not fully understood. This paper presents new findings from cutting experiments including: (1) uninterrupted orthogonal cutting and (2) interrupted flycutting of germanium. Forces are measured and the cutting mechanics are correlated with surface and subsurface measurements performed with: (1) atomic force microscopy, (2) confocal Raman spectroscopy, and (3) channeling Rutherford backscattering spectrometry. These fundamental results guide parameter choice for more complex freeform ball milling of optics for IR applications ranging from surveillance to medical imaging.

      PubDate: 2016-10-16T13:02:50Z
  • Critical depth of cut and asymptotic spindle speed for chatter in micro
           milling with process damping
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): J.J. Wang, E. Uhlmann, D. Oberschmidt, C.F. Sung, I. Perfilov
      This paper presents formulas for determining the critical depths of cut and asymptotic spindle speed for stable micro milling processes with process damping. The asymptotic spindle speed of a theoretically infinite stable depth of cut is shown to be proportional to the modal natural frequency, radial ploughing constant and radial immersion angle, but inversely proportional to the shearing related cutting constants and tool diameter. These formulas enable identifying the asymptotic speed, absolute stability limit, and in-process radial ploughing constant from experimental stability limits without requiring modal parameters. The presented model is validated by comparison with prior works and verified by experiments.

      PubDate: 2016-10-16T13:02:50Z
  • Thermo-mechanical modeling of the third deformation zone in machining for
           prediction of cutting forces
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Erhan Budak, Emre Ozlu, Hayri Bakioglu, Zahra Barzegar
      Third deformation zone in machining arises due to contact between the cutting edge and the work material resulting in edge forces. Contribution of edge forces can be significant for cases involving large cutting edge radii or small feed rates. In this study, a thermo-mechanical modelling of the third deformation zone is presented with applications. The model eliminates the need for extensive number of calibration tests for identification of these coefficients. Effects of cutting edge geometry and process conditions on the edge forces are investigated through measurements and predictions. The application of the model to micro milling operations is also demonstrated.

      PubDate: 2016-10-16T13:02:50Z
  • Prediction of effect of helix angle on cutting force coefficients for
           design of new tools
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): E. Ozturk, O. Ozkirimli, T. Gibbons, M. Saibi, S. Turner
      For accurate cutting force prediction in a milling process, material data for a given tool and workpiece, i.e. cutting force coefficients are required. Generally two methods, namely, orthogonal to oblique transformation or mechanistic method are used for calculation of cutting force coefficients. These methods have several drawbacks in designing of new milling tools. In order to help design of new tools, two methods are proposed to predict the effect of helix angle on cutting force coefficients. The methods were tested on five tools with different helix angles and predictions of the methods were compared with experiments.

      PubDate: 2016-10-16T13:02:50Z
  • Design of irregular pitch end mills to attain robust suppression of
           regenerative chatter
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): N. Suzuki, R. Ishiguro, T. Kojima
      This paper presents a design method of irregular pitch end mills, which ensures robust suppression of total regeneration in milling. Firstly, general formulation of irregular pitch angles is explained for simultaneous suppression of multi-mode regenerations. An index named “Regeneration Factor (RF)” is introduced to quantify regenerative effect. Minimizing the mean value of the RF within a certain frequency range, suppression frequencies are distributed in the proposed method, resulting in robust suppression of regeneration regardless of chatter frequency and/or spindle speed variations. Experimental investigations verified significant robustness of the end mill with the proposed design against the spindle speed variation.

      PubDate: 2016-10-16T13:02:50Z
  • Chip geometry and cutting forces in gear shaping
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Kaan Erkorkmaz, Andrew Katz, Yasin Hosseinkhani, Denys Plakhotnik, Marc Stautner, Fathy Ismail
      Shaping is a versatile process for machining gear teeth on complex monolithic components, which cannot otherwise be produced using other methods (like hobbing) due to geometric constraints. This paper presents a new model to accurately predict the chip geometry and cutting forces in shaping. Kinematics of gear shaping is modeled and verified. Cutter–workpiece engagement is predicted using a dexel-based geometric modeler, and refined by alpha-shape reconstruction. Varying rake and oblique angles are resolved along the cutting edges and used in three-dimensional force predictions. Simulated forces are shown to agree closely with those measured on a gear shaping machine.

      PubDate: 2016-10-16T13:02:50Z
  • Comparison of conventional drilling and orbital drilling in machining
           carbon fibre reinforced plastics (CFRP)
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): Robert Voss, Marcel Henerichs, Friedrich Kuster
      Drilling of highly abrasive carbon fibre reinforced plastics for the aerospace industry requires a machining process with excellent bore quality, sufficient tool lifetime and simultaneously short cycle time. This paper presents a comparison between conventional and orbital drilling of heavy-to-cut unidirectional CFRP material with diamond coated tools. The material contains high fibre content and a polished-like surface at bore exit. Focus of the process comparison is on introduced workpiece damages, tool wear, bore diameter variances as well as cycle times. Three dimensional bore exit microscopy, micrographs and expansion tests with conical pin are used to evaluate the workpiece integrity.

      PubDate: 2016-10-16T13:02:50Z
  • A new hybrid oscillatory orbital process for drilling of composites using
           superabrasive diamond tools
    • Abstract: Publication date: 2016
      Source:CIRP Annals - Manufacturing Technology, Volume 65, Issue 1
      Author(s): I. Sultana, Z. Shi, H. Attia, V. Thomson
      A new hybrid oscillatory orbital process, using superabrasive diamond tools, was developed for drilling FRP composites. Effects of grain size and tool geometry on forces, temperatures, and surface integrity were experimentally investigated. With proper selection of cutting conditions and process variables, the limitations of conventional orbital drilling using carbide tools can be eliminated by significantly reducing the forces and surface roughness, while increasing tool life by an order of magnitude. This is comparable to PCD tools, at a fraction of the cost. A force model based on process kinematics and chip formation mechanism was developed and validated.

      PubDate: 2016-10-16T13:02:50Z
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