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  Subjects -> ENGINEERING (Total: 2284 journals)
    - CHEMICAL ENGINEERING (192 journals)
    - CIVIL ENGINEERING (184 journals)
    - ELECTRICAL ENGINEERING (102 journals)
    - ENGINEERING (1208 journals)
    - ENGINEERING MECHANICS AND MATERIALS (389 journals)
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    - MECHANICAL ENGINEERING (89 journals)

ENGINEERING (1208 journals)                  1 2 3 4 5 6 7 | Last

Showing 1 - 200 of 1205 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 7)
3D Research     Hybrid Journal   (Followers: 19)
AAPG Bulletin     Hybrid Journal   (Followers: 5)
AASRI Procedia     Open Access   (Followers: 15)
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: 227)
Acta Geotechnica     Hybrid Journal   (Followers: 7)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 2)
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: 11)
Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi     Open Access  
Adsorption     Hybrid Journal   (Followers: 4)
Advanced Engineering Forum     Full-text available via subscription   (Followers: 6)
Advanced Science     Open Access   (Followers: 5)
Advanced Science Focus     Free   (Followers: 3)
Advanced Science Letters     Full-text available via subscription   (Followers: 6)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 7)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 17)
Advances in Artificial Neural Systems     Open Access   (Followers: 4)
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: 10)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 20)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 25)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 9)
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: 12)
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: 37)
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: 29)
Ain Shams Engineering Journal     Open Access   (Followers: 5)
Akademik Platform Mühendislik ve Fen Bilimleri Dergisi     Open Access  
Alexandria Engineering Journal     Open Access   (Followers: 1)
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: 6)
Applied Catalysis B: Environmental     Hybrid Journal   (Followers: 9)
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: 7)
Applied Network Science     Open Access  
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Physics Research     Open Access   (Followers: 3)
Applied Sciences     Open Access   (Followers: 2)
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: 7)
Arid Zone Journal of Engineering, Technology and Environment     Open Access  
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
ASEE Prism     Full-text available via subscription   (Followers: 3)
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: 8)
Asian Journal of Control     Hybrid Journal  
Asian Journal of Current Engineering & Maths     Open Access  
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 8)
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: 8)
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: 4)
Bautechnik     Hybrid Journal   (Followers: 1)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 23)
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: 9)
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: 17)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 32)
Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 5)
Biomedical Microdevices     Hybrid Journal   (Followers: 8)
Biomedical Science and Engineering     Open Access   (Followers: 3)
Biomedizinische Technik - Biomedical Engineering     Hybrid Journal  
Biomicrofluidics     Open Access   (Followers: 4)
BioNanoMaterials     Hybrid Journal   (Followers: 2)
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     Hybrid Journal   (Followers: 14)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 41)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 7)
Case Studies in Thermal Engineering     Open Access   (Followers: 3)
Catalysis Communications     Hybrid Journal   (Followers: 6)
Catalysis Letters     Hybrid Journal   (Followers: 2)
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: 3)
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: 11)
CIRP Journal of Manufacturing Science and Technology     Full-text available via subscription   (Followers: 14)
City, Culture and Society     Hybrid Journal   (Followers: 21)
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: 3)
Coastal Engineering     Hybrid Journal   (Followers: 11)
Coastal Engineering Journal     Hybrid Journal   (Followers: 4)
Coatings     Open Access   (Followers: 3)
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: 26)
Composite Interfaces     Hybrid Journal   (Followers: 6)
Composite Structures     Hybrid Journal   (Followers: 256)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 179)
Composites Part B : Engineering     Hybrid Journal   (Followers: 227)
Composites Science and Technology     Hybrid Journal   (Followers: 197)
Comptes Rendus Mécanique     Full-text available via subscription   (Followers: 2)
Computation     Open Access  
Computational Geosciences     Hybrid Journal   (Followers: 13)
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: 28)
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: 10)
Computing and Visualization in Science     Hybrid Journal   (Followers: 5)
Computing in Science & Engineering     Full-text available via subscription   (Followers: 29)
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: 8)
Control Engineering Practice     Hybrid Journal   (Followers: 42)
Control Theory and Informatics     Open Access   (Followers: 7)
Corrosion Science     Hybrid Journal   (Followers: 25)
CT&F Ciencia, Tecnologia y Futuro     Open Access  

        1 2 3 4 5 6 7 | Last

Journal Cover CIRP Annals - Manufacturing Technology
  [SJR: 2.207]   [H-I: 99]   [11 followers]  Follow
    
   Full-text available via subscription Subscription journal
   ISSN (Print) 0007-8506
   Published by Elsevier Homepage  [3042 journals]
  • Motion planning and scheduling for human and industrial-robot
           collaboration
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Stefania Pellegrinelli, Andrea Orlandini, Nicola Pedrocchi, Alessandro Umbrico, Tullio Tolio
      Step-changes in safety technologies have opened robotic cells to human workers in real industrial scenarios. However, the lack of methodologies for a productive and effective motion planning and scheduling of human–robot cooperative (HRC) tasks is still limiting the spread of HRC systems. Standard methods fail due to the high-variability of the robot execution time, caused by the necessity to continuously modify the robot motion to grant human safety. In this context, the paper introduces an innovative integrated motion planning and scheduling methodology that (i) provides a set of robot trajectories for each task as well as an interval on the robot execution time for each trajectory and (ii) optimizes, at relevant time steps, a task plan, minimizing the cycle time through trajectory selection, task sequence and task allocation. The application of the approach to an industrial case is presented and discussed.

      PubDate: 2017-07-12T08:09:36Z
       
  • Human–robot collaborative assembly in cyber-physical production:
           Classification framework and implementation
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Xi Vincent Wang, Zsolt Kemény, József Váncza, Lihui Wang
      The production industry is moving towards the next generation of assembly, which is conducted based on safe and reliable robots working in the same workplace alongside with humans. Focusing on assembly tasks, this paper presents a review of human–robot collaboration research and its classification works. Aside from defining key terms and relations, the paper also proposes means of describing human–robot collaboration that can be relied on during detailed elaboration of solutions. A human–robot collaborative assembly system is developed with a novel and comprehensive structure, and a case study is presented to validate the proposed framework.

      PubDate: 2017-07-12T08:09:36Z
       
  • Dual arm robot in cooperation with humans for flexible assembly
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Sotiris Makris, Panagiota Tsarouchi, Aleksandros-Stereos Matthaiakis, Athanasios Athanasatos, Xenofon Chatzigeorgiou, Michael Stefos, Konstantinos Giavridis, Sotiris Aivaliotis
      This paper discusses a flexible assembly cell, including a dual arm robot in cooperation with humans for assembly tasks typically performed by operators. The robot performs these tasks both in isolation and cooperation with the human. Sensor data are used for programming the robot’s motion and controlling the program’s execution in a fenceless setup. Safety is ensured with the use of 3D sensing devices, while the tasks’ coordination is managed by the so-called station controller. The programming approach combines both offline and on-line methods, in an intuitive manner. The proposed assembly cell is demonstrated in an automotive industry case.

      PubDate: 2017-07-12T08:09:36Z
       
  • Smooth trajectory generation for industrial robots performing high
           precision assembly processes
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Anna Valente, Stefano Baraldo, Emanuele Carpanzano
      Industrial robots conceived for high-precision assembly processes are demanded to match the best trade-off between precision and speed. This research presents a new approach for defining the motion profiles of robots, based on a smooth trajectory generation model. Execution time is minimized by a novel multi-variable optimization approach, taking into account the performance of each joint and the requirements of extremely precise assembly tasks. The proposed method, tested on a modular robot for the optoelectronics industry, provides jerk-bounded trajectories up to 39% faster compared to the best performing motion planning approaches, while offering the possibility to adapt these trajectories for degraded operating conditions.

      PubDate: 2017-07-12T08:09:36Z
       
  • Creating service modules for customising product/service systems by
           extending DSM
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Tomohiko Sakao, Wenyan Song, Johannes Matschewsky
      Customising offerings effectively for customers’ needs and wants, yet maintaining the provider’s efficiency, is a challenging task. Modularisation is a key to achieve this, but insight on how to create modules for customising product/service systems (PSSs) is limited. This article proposes a new practical method that supports designers to create service modules by extending the DSM (Design Structure Matrix). The method has been applied to existing PSSs by an elevator manufacturer. It was found effective because it reduces complexity in customisation, and thus response time in service provision, as well as increases the chance of reusing previous designs.

      PubDate: 2017-07-12T08:09:36Z
       
  • A novel process-linked assembly failure model for adhesively bonded
           composite structures
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Hamed Yazdani Nezhad, Yifan Zhao, Paul D. Liddel, Veronica Marchante, Rajkumar Roy
      The globally growing market for polymer composites and their increasing use within aircraft structures has necessitated reliable bonding of composite laminates to prevent structural failure. However, knowledge behind the interaction between curing process parameters and the failure of polymer composite bonded joints is not keeping pace with the market. A novel nonlinear correlation analysis has been employed and applied to experimental data, to attentively quantify the effect of curing parameters on the failure of bonded composite assemblies. The materials (adherends and adhesive) and the bonding processes were selected from those used in assembly of composite aircraft structures.

      PubDate: 2017-07-12T08:09:36Z
       
  • Dynamic scheduling of a flow shop with on-site wind generation for energy
           cost reduction under real time electricity pricing
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Yuxin Zhai, Konstantin Biel, Fu Zhao, John W. Sutherland
      On-site renewable electricity generation represents an attractive option for manufacturing enterprises to deal with time varying electricity prices while reducing their carbon footprint. Production scheduling can be used to take full advantage of the installed renewable energy capacity for electricity cost reduction. A dynamic scheduling approach is proposed to minimize the electricity cost of a flow shop with a grid-integrated wind turbine. Time series models are used to provide updated wind speed and electricity prices as actual data becomes available. The production schedule and energy supply decisions are adjusted based on the new information. The approach is demonstrated using a case study.

      PubDate: 2017-07-12T08:09:36Z
       
  • Environmental impacts of electricity self-consumption from organic
           photovoltaic battery systems at industrial facilities in Denmark
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Marios D. Chatzisideris, Alexis Laurent, Michael Z. Hauschild, Frederik C. Krebs
      Organic photovoltaics (OPV) show promise of greatly improving the environmental and economic performance of PV compared to conventional silicon. Life cycle assessment studies have assessed the environmental impacts of OPV, but not under a self-consumption scheme for industrial facilities. We investigate the life cycle environmental impacts of electricity self-consumption from an OPV system coupled with a sodium/nickel chloride battery at an iron/metal industry in Denmark. Results show that an OPV system without storage could decrease the carbon footprint of the industry; installation of the battery increases climate change and human toxicity impacts. We discuss sensitive modelling parameters and provide recommendations.

      PubDate: 2017-07-12T08:09:36Z
       
  • The water–energy nexus in manufacturing systems: Framework and
           systematic improvement approach
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Sebastian Thiede, Denis Kurle, Christoph Herrmann
      Factories consist of production equipment, technical building services (TBS) and building shell, which are connected through interdependent energy and resource flows. The relationship of water and energy flows (water–energy nexus) is an important example—it couples energy and water demands in manufacturing (e.g. cooling, heating, cleaning) with TBS such as boilers, cooling systems or water treatment. While being intensively discussed in context of e.g. industrial ecology, there is no systematic methodological support to improve the water–energy nexus towards sustainability in manufacturing. Therefore, the paper provides a framework and methodology for systematic improvement, which is applied within a case study.

      PubDate: 2017-07-12T08:09:36Z
       
  • On the stability of plastic flow in cutting of metals
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Koushik Viswanathan, Anirudh Udupa, Ho Yeung, Dinakar Sagapuram, James B. Mann, Mojib Saei, Srinivasan Chandrasekar
      We examine large-strain deformation and unsteady flow modes in cutting using high-speed imaging. For metals which exhibit large workability and strain hardening, the commonly assumed laminar flow is inherently unstable. Instead, the cutting is characterized by sinuous flow, with large-amplitude folding, that is triggered by a plastic buckling instability linked to the material microstructure. A microstructure basis is also suggested for shear band flow in high-speed cutting, with the band region showing a fluid-like characteristic with very small viscosity. Mechanochemical Rehbinder effects, long reported in cutting of metals, are found to be closely linked to the unsteady flow modes.

      PubDate: 2017-07-12T08:09:36Z
       
  • PVDF sensor based characterization of chip segmentation in cutting of
           Ti-6Al-4V alloy
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Vinh Nguyen, Patxi Fernandez-Zelaia, Shreyes N. Melkote
      This paper presents a study of chip segmentation in orthogonal cutting of Ti-6Al-4V alloy using a low-cost high fidelity measurement system consisting of a polyvinylidene fluoride (PVDF) thin film piezoelectric dynamic strain sensor. The sensor is shown to be capable of measuring the chip segmentation frequency over a range of cutting conditions. In addition, the sensor is used to characterize the effect of tool wear on chip segmentation frequency and amplitude. Results show that the segmentation frequency increases while the segmentation amplitude decreases with tool wear. Physical reasons for the observed trends are given.

      PubDate: 2017-07-12T08:09:36Z
       
  • Towards cutting force evaluation without cutting tests
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): S. Campocasso, G. Poulachon, S. Bissey-Breton, J.P. Costes, J.C. Outeiro
      Mechanistic cutting force modelling generally involves coefficients identification from machining tests. In order to develop multi-material cutting force models avoiding identification, several studies have tried to link cutting forces to mechanical properties from databases, whose relevance remains questionable. In this study, the cutting coefficients obtained by inverse identification from turning tests are compared with properties obtained from several mechanical tests. The correlations show that cutting forces can be estimated, without cutting tests, using hat-shaped shear tests. The originality of the approach is the behaviour proximity of the five machined materials used: thermal and mechanical treated pure coppers, brass and bronze.

      PubDate: 2017-07-12T08:09:36Z
       
  • Identification of an optimal cutting edge microgeometry for Complementary
           Machining
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Frederik Zanger, Michael Gerstenmeyer, Hartmut Weule
      The process strategy Complementary Machining combines machining and surface modification, resulting in optimal workpiece properties like fatigue strength. Right after machining the cutting tool is used reversely acting as a tool for a mechanical surface modification. The challenge of designing a cutting edge microgeometry that withstands the load spectrum and induces optimal surface layer states during Complementary Machining is solvable by modeling the resulting surface layer using FEM-simulation. Using the simulation-based analyses a deep process understanding is accomplished enabling further optimization of surface integrity (e.g. grain refinement) which is proven by measurements.

      PubDate: 2017-07-12T08:09:36Z
       
  • Assessment of mechanical loads based on surface integrity analysis of
           machined components
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Thilo Grove, Tobias Mörke
      Today, the capability of machined components to provide information on mechanical loads during their usage phase is not being assessed. However, it is well known that especially residual stresses change due to mechanical load. An approach is presented, how this effect can be utilized to determine the mechanical loads a component has been exposed to. To enable the identification, more than one property has to be used to identify the combination of load stress amplitude and number of load cycles. The presented paper focuses on the analysis of precision and reliability of the determined solutions.

      PubDate: 2017-07-12T08:09:36Z
       
  • Investigation of the cutting mechanisms and the anisotropic ductility of
           monocrystalline sapphire
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Yuta Mizumoto, Philipp Maas, Yasuhiro Kakinuma, Sangkee Min
      In this study, plunge-cut tests are conducted on single-crystal sapphire to investigate the brittle and ductile deformation mechanisms from the viewpoint of crystal anisotropy. The anisotropic deformation behaviour of the machined sapphire substrate manifests itself in the critical depth of cut and the diverse crack morphologies. Based on a resolved stress model that is adapted to the experimental procedure, weighted resolved stresses are computed, and the tendency of brittle–ductile transition depending on the peculiarities of the low-symmetry hexagonal crystal structure is discussed. Rhombohedral twinning is assumed to dominate the brittle–ductile transition.

      PubDate: 2017-07-12T08:09:36Z
       
  • Micro milling tool made of nano-polycrystalline diamond for precision
           cutting of SiC
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Hirofumi Suzuki, Mutsumi Okada, Wataru Asai, Hitoshi Sumiya, Katsuko Harano, Yutaka Yamagata, Katsuhiro Miura
      Micro milling tools made of binderless ultra-hard nano-polycrystalline diamond (NPCD) were developed to machine micro-textured or structured surfaces on silicon carbide (SiC) molds. Many cutting edges were fabricated three-dimensionally on the NPCD tool edges using a laser. The NPCD consists of very fine grains having a length of several tens of nano-meters and is harder and more thermally stable. During the cutting experiments of SiC, it was demonstrated that the tool wear in NPCD was extremely small compared with a single crystal diamond and a micro-textured surface with very fine textures was created on the SiC mold in ductile mode.

      PubDate: 2017-07-12T08:09:36Z
       
  • Error correction methodology for ultra-precision three-axis milling of
           freeform optics
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): J.D. Owen, J.A. Shultz, T.J. Suleski, M.A. Davies
      Freeform optics facilitate a revolutionary approach to optical design. Ultra-precision diamond machining is an enabling technology for the manufacture of freeform optics. However, optical designs require tight tolerances across spatial wavelengths ranging from micro-roughness to overall form. To manufacture freeform optics to the necessary tolerances, a novel artifact-based error reduction methodology applicable to multi-axis diamond milling was developed. As demonstrated on a test sphere, the methodology reduces dominant error sources on the test sphere surface from 194 to 40nm RMS. The approach is then successfully applied to an example freeform optical design where comparable error levels are achieved.

      PubDate: 2017-07-12T08:09:36Z
       
  • Surface quality in micro milling: Influences of spindle and cutting
           parameters
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Jan C. Aurich, Martin Bohley, Ingo G. Reichenbach, Benjamin Kirsch
      Micro milling is a competitive process to manufacture small parts and to structure surfaces in high quality with low set-up costs. However, the micro milling process poses many challenges and basic mechanisms are still to be researched. In addition, process-machine interactions are much more pronounced in micro than in macro machining. In this paper, the influence of the tilt angle of the spindle on the generated surface quality is investigated by kinematic simulations and experiments. Single edge micro end mills with an effective milling cutter diameter of 50μm are applied. Recommendations are given to enhance process stability and surface quality.

      PubDate: 2017-07-12T08:09:36Z
       
  • Thermal analysis in Ti-6Al-4V drilling
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Ismail Lazoglu, Gérard Poulachon, Christophe Ramirez, Mohammad Akmal, Bertrand Marcon, Frédéric Rossi, José C. Outeiro, Michaël Krebs
      Ti-6Al-4V is commonly used especially in aerospace and biomedical industries. This alloy is known as a difficult-to-cut material. Due to its poor thermal properties, the heat generated during machining processes traps near material deformation zones. This causes detrimental high temperatures for the cutting tools. This article combines the analytical and FEM modeling techniques to estimate the temperature evolution of carbide tools in Ti-6Al-4V drilling. In this article, a novel thermocouple based temperature measurement setup is also introduced. Moreover, the simulated and measured temperatures under various cutting conditions for the drilling of Ti-6Al-4V are presented for the validation.

      PubDate: 2017-07-12T08:09:36Z
       
  • CFD simulation for internal coolant channel design of tapping tools to
           reduce tool wear
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): D. Biermann, E. Oezkaya
      This paper presents the analysis and controlled modification of the coolant flow in tapping processes by means of Computational Fluid Dynamics (CFD). First, a conventional straight flute tapping tool was analyzed and the results of the CFD simulation show, that the cutting edges are not sufficiently supplied with coolant. Therefore, the design of the internal coolant channels was modified based on these simulation results. To validate the CFD simulation, experimental tests were performed, using an optimized tool. The applied modifications lead to a reduction of the tool wear and an increase of the tool's performance of about 36% was achieved.

      PubDate: 2017-07-12T08:09:36Z
       
  • Cemented carbide tools in high speed gear hobbing applications
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): B. Karpuschewski, M. Beutner, M. Köchig, M. Wengler
      Gears in the modulus range between m n =1mm and m n =4mm are widely used in automotive gear boxes. To enable maximum productivity in gear hobbing cutting tools made of cemented tungsten carbide are used. Despite its ability the full potential of the substrate material is not applied in industry because of unknown process limits and wear mechanisms. To examine the mechanisms and to close down the lack of knowledge three different cases of gearings were thoroughly examined. The wear phenomena and tool life behaviour were inspected within the fly-tooth analogy test at different frame conditions, reaching cutting speeds up to 1000m/min. To determine causal relations the process was also analysed by the means of interpenetration- and FEM-simulations.

      PubDate: 2017-07-12T08:09:36Z
       
  • Computational-experimental investigation of milling porous aluminium
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): N. Michailidis, S. Kombogiannis, P. Charalampous, G. Maliaris, F. Stergioudi
      Porous materials are increasingly incorporated in light-weight structures and although they are near-net-shape fabricated, a finishing step is required to achieve the desired tolerances. Herein, a computational-experimental framework is proposed to investigate milling of porous aluminium. A FEM model was built, for the first time recorded in the literature, to simulate the milling process of the 3D closed-cell porous geometry, reconstructed by a Voronoi-based CAD algorithm. The chip evolution, traced by the developed FEM model, reveals interesting deformation mechanisms, while the chip fragmentations lead to multiple force fluctuations in a single cut, offering a good agreement with the measured forces.

      PubDate: 2017-07-12T08:09:36Z
       
  • Subsurface damage in milling of lightweight open-cell aluminium foams
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Haipeng Qiao, Saurabh Basu, Christopher Saldana, Soundar Kumara
      The present study examined the surface integrity of open cell aluminium foams at full volume using X-ray micro-computed tomography. The structural network was reconstructed in voxel models, for which watershed segmentation and medial axis extraction was utilized to identify interconnected pore (air) and strut (solid) phases. From these models, post-mortem surface integrity characteristics, including pore size, strut bending angle and preferential strut orientation were characterized as a function of controllable parameters of cutting speed, feed rate and depth of cut. Post-mortem characterization of the damage enabled mapping of fundamental failure mechanisms in the mechanics of the subsurface deformation.

      PubDate: 2017-07-12T08:09:36Z
       
  • Microbial-based metalworking fluids in milling operations
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Daniel Meyer, Marvin Redetzky, Ekkard Brinksmeier
      Most commercial metalworking fluids (MWFs), as applied in cutting operations contain mineral-oil. Colonization of water-based MWFs by microorganisms is considered a problem due to metabolism of the MWF components. This paper presents a paradigm shift by exploiting the potential of substituting oil-containing water-based MWFs in machining processes by microbial-based fluids. For the first time, specifically selected microorganisms have been applied in milling experiments and were examined regarding their lubrication performance. Compared to conventional water-based MWFs a prolonged tool life and superior surface finish were obtained in milling. From the results, the working mechanisms of microbial-based MWFs are deduced and discussed.

      PubDate: 2017-07-12T08:09:36Z
       
  • 3D surface topography analysis in 5-axis ball-end milling
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): S. Ehsan Layegh K, Ismail Lazoglu
      This article presents a new analytical model to predict the topography and roughness of the machined surface in 5-axis ball-end milling operation for the first time. The model is able to predict the surface topography and profile roughness parameters such as 3D average roughness (Sa) and 3D root mean square roughness (Sq) by considering the process parameters such as the feedrate, number of flutes, step-over and depth of cut as well as the effects of eccentricity and tool runout in 5-axis ball-end milling. This model allows to simulate the effects of the lead and tilt angles on the machined surface quality in the virtual environment prior to the costly 5-axis machining operations. The effectiveness of the introduced surface topography prediction model is validated experimentally by conducting 5-axis ball-end milling tests in various cutting conditions.

      PubDate: 2017-07-12T08:09:36Z
       
  • Toward a Digital Twin for real-time geometry assurance in individualized
           production
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Rikard Söderberg, Kristina Wärmefjord, Johan S. Carlson, Lars Lindkvist
      Simulations of products and production processes are extensively used in the engineering phase. To secure good geometrical quality in the final product, tolerances, locator positions, clamping strategies, welding sequence, etc. are optimized during design and pre-production. Faster optimization algorithms, increased computer power and amount of available data, can leverage the area of simulation toward real-time control and optimization of products and production systems – a concept often referred to as a Digital Twin. This paper specifies and highlights functionality and data models necessary for real-time geometry assurance and how this concept allows moving from mass production to more individualized production.

      PubDate: 2017-07-12T08:09:36Z
       
  • Shaping the digital twin for design and production engineering
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Benjamin Schleich, Nabil Anwer, Luc Mathieu, Sandro Wartzack
      The digitalization of manufacturing fuels the application of sophisticated virtual product models, which are referred to as digital twins, throughout all stages of product realization. Particularly, more realistic virtual models of manufactured products are essential to bridge the gap between design and manufacturing and to mirror the real and virtual worlds. In this paper, we propose a comprehensive reference model based on the concept of Skin Model Shapes, which serves as a digital twin of the physical product in design and manufacturing. In this regard, model conceptualization, representation, and implementation as well as applications along the product life-cycle are addressed.

      PubDate: 2017-07-12T08:09:36Z
       
  • Point cloud based robot cell calibration
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Gergely Horváth, Gábor Erdős
      This paper presents a method to automatically calibrate an articulated robot arm using measured point cloud data. The method captures the inner structure of complex engineering objects from measured datasets. In the developed workflow first the point cloud is segmented, and then the CAD models of the objects in the work cell are recognized and fitted onto the segmented point cloud. To boost the computational efficiency of the method, parallelization was performed by applying general-purpose programming of the graphics processing unit. In this paper the calibration of a UR5 robot is carried out using measured data of a Kinect sensor.

      PubDate: 2017-07-12T08:09:36Z
       
  • Structure design and analysis with integrated AR-FEA
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): S.K. Ong, J.M. Huang
      Traditional finite element analysis (FEA) tools, which are important tools for design and analysis of engineering structures, do not facilitate model evaluation and result interpretation easily, as they usually have complex and non-intuitive user interfaces. This paper presents a design approach integrating FEA with augmented reality (AR) to enhance structure design and evaluation. With integrated AR-FEA, design engineers can apply virtual loads and examine critical regions directly on physical prototypes with FEA models and results superimposed directly on these prototypes. Intuitive data slicing and clipping allow designers to explore FEA results. Virtual structures can be added to simulate design modification.

      PubDate: 2017-07-12T08:09:36Z
       
  • A generative multi-agent design methodology for additively manufactured
           parts inspired by termite nest building
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Vimal Dhokia, Wesley P. Essink, Joseph M. Flynn
      The geometrical complexity available through additive manufacturing processes requires new tools to help designers maximise its advantages. A termite colony can construct highly complex nests that are optimised for thermoregulation and ventilation. The simple individual behaviour of these termites leads to highly intelligent colony behaviour, allowing nests to be simultaneously designed, optimised and produced. By mimicking termite behaviour, this research has led to a new design methodology using multi-agent algorithms that simultaneously design, structurally optimise and appraise the manufacturability of parts produced by additive manufacturing. A case study demonstrates the generative design of lightweight parts using the multi-agent system.

      PubDate: 2017-07-12T08:09:36Z
       
  • Geometrical product specification and verification in additive
           manufacturing
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Giovanni Moroni, Stefano Petrò, Wilma Polini
      The geometric freedom associated with additive manufacturing (AM) processes create new challenges in defining, communicating, and assessing the dimensional and geometric accuracy of parts. Starting from a review of the ASME-GD&T and ISO-GPS current practices, a new approach is proposed in this paper. The new approach combines current tolerancing practices with an enriched voxel-based volumetric representation scheme to overcome the limitations of standard methods. Moreover, the new approach enables a linkage between product design optimization and product verification with respect to the AM process chain. A case study is considered to demonstrate the concept.

      PubDate: 2017-07-12T08:09:36Z
       
  • Geometrical variations management for additive manufactured product
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Jean-Yves Dantan, Zhicheng Huang, Edoh Goka, Lazhar Homri, Alain Etienne, Nicolas Bonnet, Mickael Rivette
      Additive manufacturing (AM) became an advanced research topic due to its ability to manufacture complex shapes. But the ability to achieve predictable and repeatable shapes is critical. Therefore, to optimize the design of an additive manufactured product, tolerancing is a key issue. This paper focuses on geometrical quality assessment of an AM product. It includes a process oriented geometrical model to predict the surface roughness and dimensional deviations, and a geometrical simulation tool to assess the impacts of these deviations on the geometrical behaviour of the joint. An application of the approach is illustrated through a case study.

      PubDate: 2017-07-12T08:09:36Z
       
  • Reconfiguration of smart products during their use phase based on virtual
           product twins
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Michael Abramovici, Jens Christian Göbel, Philipp Savarino
      Recent ICT innovations have begun to dramatically change traditional products towards intelligent, connected Smart Products. These product-related changes inevitably imply the need for radically new engineering processes. Product development will no longer solely concentrate on the early phase of product lifecycles but also on the product use phase. Here, especially the reconfiguration of products during their use phase across different engineering domains will be a core challenge. This paper introduces a conceptual approach for the reconfiguration of Smart Products, which considers dynamical, virtual models of each real product instance using the concept of virtual product twins and an Internet of Things platform. The conceptual approach is prototypically demonstrated by considering a model environment for smart cars, which are temporarily reconfigured during their use phase.

      PubDate: 2017-07-12T08:09:36Z
       
  • Innovations in digital modelling for next generation manufacturing system
           design
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Rainer Stark, Simon Kind, Sebastian Neumeyer
      Interlinked and autonomous manufacturing systems provide new opportunities in smart manufacturing. Today's manufacturing system design processes and architecture still are based on traditional engineering methods and can hardly cope with increased system complexity. Hence new cyber physical production systems (CPPS) design and architecture principles as well as corresponding validation and verification methods are necessary. This paper presents firstly a new architecture design approach for modularised design of CPPS. Secondly, new capabilities in designing with modular construction kits, simulating functional behaviour and validating with virtual, functional prototype are introduced. Thirdly, a proposal for the development approach and virtual validation is presented and risks as well as challenges are discussed.

      PubDate: 2017-07-12T08:09:36Z
       
  • Open interface design for product personalization
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Jian Zhang, Peihua Gu, Qingjin Peng, S. Jack Hu
      Open interfaces can improve the product personalization using product functional modules developed by third party vendors. They also support the product update through the module upgrading or replacement during the product lifespan. Characteristics of open interfaces are firstly investigated by the comparison with traditional mechanical interfaces. Methods are then introduced for the design, evaluation and operation of open interfaces. An open interface of the electric vehicle is proposed for the connection of different battery packs to verify the feasibility of proposed methods. Novelty of the research is the improved open interface for personalized products.

      PubDate: 2017-07-12T08:09:36Z
       
  • Integrated design for tackling safety and security challenges of smart
           products and digital manufacturing
    • Abstract: Publication date: 2017
      Source:CIRP Annals - Manufacturing Technology, Volume 66, Issue 1
      Author(s): Andreas Riel, Christian Kreiner, Georg Macher, Richard Messnarz
      The Internet of Things (IoT) is the key facilitator for digital manufacturing (Industry 4.0, Cyber-physical Systems), as well as for smart, intelligent products, services and processes. In the IoT, increasingly many product and process functions become safety-critical and exposed to IT security attacks. This adds tremendous complexity to product and process design, which this paper shows by using the automotive sector as a particularly challenging example. The article proposes a new logic and method for tackling the major challenges of design for functional safety and IT security which is essentially based on reducing the design solutions’ complexities by integration.

      PubDate: 2017-07-12T08:09:36Z
       
  • Contributions of precision engineering to the revision of the SI
    • Abstract: Publication date: Available online 29 June 2017
      Source:CIRP Annals - Manufacturing Technology
      Author(s): Harald Bosse, Horst Kunzmann, Jon R. Pratt, Stephan Schlamminger, Ian Robinson, Michael de Podesta, Paul Shore, Alessandro Balsamo, Paul Morantz
      All measurements performed in science and industry are based on the International System of Units, the SI. It has been proposed to revise the SI following an approach which was implemented for the redefinition of the unit of length, the metre, namely to define the SI units by fixing the numerical values of so-called defining constants, including c, h, e, k and N A. We will discuss the reasoning behind the revision, which will likely be put into force in 2018. Precision engineering was crucial to achieve the required small measurement uncertainties and agreement of measurement results for the defining constants.

      PubDate: 2017-07-03T07:07:40Z
       
  • Laser based additive manufacturing in industry and academia
    • Abstract: Publication date: Available online 28 June 2017
      Source:CIRP Annals - Manufacturing Technology
      Author(s): Michael Schmidt, Marion Merklein, David Bourell, Dimitri Dimitrov, Tino Hausotte, Konrad Wegener, Ludger Overmeyer, Frank Vollertsen, Gideon N. Levy
      Additive manufacturing (AM) is pushing towards industrial applications. But despite good sales of AM machines, there are still several challenges hindering a broad economic use of AM. This keynote paper starts with an overview over laser based additive manufacturing with comments on the main steps necessary to build parts to introduce the complexity of the whole process chain. Then from a manufacturing process oriented viewpoint it identifies these barriers for Laser Beam Melting (LBM) using results of a round robin test inside CIRP and the work of other research groups. It shows how those barriers may be overcome and points out research topics necessary to be addressed in the near future.

      PubDate: 2017-07-03T07:07:40Z
       
  • Novel surgical machining via an impact cutting method based on fracture
           analysis with a discontinuum bone model
    • Abstract: Publication date: Available online 17 June 2017
      Source:CIRP Annals - Manufacturing Technology
      Author(s): Naohiko Sugita, Liming Shu, Takehiro Shimada, Masaya Oshima, Toru Kizaki, Mamoru Mitsuishi
      Cutting (including sawing and drilling) is a common procedure in orthopedics. Although it is widely used, cutting is associated with surgical problems, such as bone breakthrough and necrosis. In this study, the phenomenon of large fractures was analyzed with a discontinuum model of a bone by initially predicting crack propagation. A cutting method utilizing impacts by vibration was then proposed, and experiments were performed. The results indicated that the principal cutting force decreased by more than 80% in each cutting direction. The findings suggest that the method can realize low load, high efficiency, and high accuracy of bone machining.

      PubDate: 2017-06-21T21:31:35Z
       
  • Hot stamping of ultra-high strength steel parts
    • Abstract: Publication date: Available online 16 June 2017
      Source:CIRP Annals - Manufacturing Technology
      Author(s): K. Mori, P.F. Bariani, B.-A. Behrens, A. Brosius, S. Bruschi, T. Maeno, M. Merklein, J. Yanagimoto
      The demand for new processes to produce high strength parts, under appropriate cost and productivity, has grown with weight reduction and crash safety improvements in automobile design. The hot stamping processes of quenchable steel sheets potentially offer not only small forming load and high formability, but also high strength and no springback by die quenching. This paper aims to provide an overview of the state-of-the-art in such hot stamping processes, including quenchability, formability, heating and cooling approaches and lubrication. The paper also includes a description of the mechanism of formability and quenching, tailoring, analysis of hot stamping processes and applicability.

      PubDate: 2017-06-16T21:11:53Z
       
  • Materials for additive manufacturing
    • Abstract: Publication date: Available online 9 June 2017
      Source:CIRP Annals - Manufacturing Technology
      Author(s): David Bourell, Jean Pierre Kruth, Ming Leu, Gideon Levy, David Rosen, Allison M. Beese, Adam Clare
      Critical to the selection requirements for additive manufacturing (AM) is the need for appropriate materials. Materials requirements for AM include the ability to produce the feedstock in a form amenable to the specific AM process, suitable processing of the material by AM, capability to be acceptably post-processed to enhance geometry and properties, and manifestation of necessary performance characteristics in service. As AM has matured, specific classes of material have become associated with specific AM processes and applications. This paper gathers this information for each of the seven categories of ISO/ASTM AM categories. Polymers, metals, ceramics and composites are considered. Microstructural features affecting AM part properties are listed. Service properties of AM parts are described, including physical, mechanical, optical and electrical properties. An additive manufacturability index is proposed.

      PubDate: 2017-06-12T09:18:19Z
       
  • Nanomanufacturing—Perspective and applications
    • Abstract: Publication date: Available online 9 June 2017
      Source:CIRP Annals - Manufacturing Technology
      Author(s): F.Z. Fang, X.D. Zhang, W. Gao, Y.B. Guo, G. Byrne, H.N. Hansen
      Nanomanufacturing involves scaled-up, reliable, and cost-effective manufacturing of nanoscale materials, structures, devices, and systems. Nanomanufacturing methods can be classified into top-down and bottom-up approaches, including additive, subtractive, and replication/mass conservation processes. These include a cluster of various techniques such as nanomachining, nanofabrication, and nanometrology to produce nanotechnology components and conduct evaluation. This paper mainly focuses on the manufacturing methods for complex shapes or structures, such as textures on curves and hierarchical structures, and outlines the research perspectives and the current application status of nanomanufacturing fundamentals and key technologies.

      PubDate: 2017-06-12T09:18:19Z
       
  • Modeling competitive market of remanufactured products
    • Abstract: Publication date: Available online 25 May 2017
      Source:CIRP Annals - Manufacturing Technology
      Author(s): Yasushi Umeda, Kazuma Ishizuka, Mitsutaka Matsumoto, Yusuke Kishita
      Although remanufacturing is effective for increasing resource efficiency, its market share is very small in some developing countries. For analyzing market conditions for remanufacturing, this paper proposes a market model to be incorporated in Life Cycle Simulation by employing polynomial logit model. This model successfully simulated market competition among new, remanufactured, and refurbished products. The results suggest the possibility of diffusion of remanufactured products if the circulating system is well established. Polynomial logit model is effective for discussing policy, life cycle design, and product design, since it can map customers’ preference to the attributes of products through the utility function.

      PubDate: 2017-05-28T08:51:29Z
       
  • Product personalization enabled by assembly architecture and cyber
           physical systems
    • Abstract: Publication date: Available online 22 May 2017
      Source:CIRP Annals - Manufacturing Technology
      Author(s): Changbai Tan, S. Jack Hu, Haseung Chung, Kira Barton, Cecil Piya, Karthik Ramani, Mihaela Banu
      Personalization is an emerging manufacturing paradigm towards meeting diversified customer needs. This paper proposes a framework for producing personalized products efficiently. An approach for optimal mix of different module types is proposed in order to construct a proper assembly architecture. Sketch-based modeling, which facilitates easy model creation and modification by customers, is presented as a key to personalized design. A cyber physical system provides the platform for the collaborative design and co-creation of personalized products. A case study on personalized bicycles based on the proposed framework is presented. Such a framework enables open product realization through active customer participation.

      PubDate: 2017-05-23T11:34:16Z
       
  • Increasing productivity in assembling z-folded
           electrode-separator-composites for lithium-ion batteries
    • Abstract: Publication date: Available online 13 May 2017
      Source:CIRP Annals - Manufacturing Technology
      Author(s): Muhammed Aydemir, Arne Glodde, Robert Mooy, Gordon Bach
      Lithium-ion batteries (LIB) are key components of electromobility and a major cost factor of electric-vehicles. With a rising demand, affordable LIB become a success-factor for electromobility. LIB have different electrode-separator-composite-designs. Assembling a z-folded composite is currently characterized through time-consuming sequential pick-and-place operations for handling discrete electrodes and folding uncoiled-strip separators, causing high manufacturing costs. To avoid time-consuming sequential handling tasks, a novel process featuring a continuous separator feeding-speed and a high-speed synchronous handling of discrete electrodes has been developed, hereby enabling for a significant decrease of cycle-times and thus reducing manufacturing costs.

      PubDate: 2017-05-18T07:48:21Z
       
  • Data-assimilated lifecycle simulation for adaptive product lifecycle
           management
    • Abstract: Publication date: Available online 12 May 2017
      Source:CIRP Annals - Manufacturing Technology
      Author(s): Shinichi Fukushige, Masaki Nishioka, Hideki Kobayashi
      This paper proposes a data-assimilated lifecycle simulation (DA-LCS) system. Data assimilation (DA) is a self-adjustment method for decreasing differences between a simulation and observation data from an actual-system by conforming the simulation model parameters to the observation at appropriate time intervals. The proposed system applies DA to LCS for adaptive operations in product lifecycle management. A case study of the lifecycle of a photovoltaic panel reuse business shows that DA-LCS successfully merges measurement data acquired from actual business operations into the LCS model, and sequentially revises the simulation estimations through DA.

      PubDate: 2017-05-18T07:48:21Z
       
  • A framework for the automated design and modelling of soft robotic systems
    • Abstract: Publication date: Available online 12 May 2017
      Source:CIRP Annals - Manufacturing Technology
      Author(s): Gundula Runge, Annika Raatz
      The introduction of collaborative robots is expected to have a positive impact on industrial assembly. In this respect, new generations of robots that can deform and yield in a collision, thus being less harmful, seem a promising supplement to traditional rigid-link robots. Recently, these so-called soft robots have received significant attention and are now beginning to unfold their potential in industrial automation. This paper presents a framework for a soft robot design and modelling tool that effectively combines finite element analysis, continuum robot modelling, and machine learning. To validate the proposed method, a soft actuator is designed, modelled, and tested.

      PubDate: 2017-05-18T07:48:21Z
       
  • Manufacturing energy analysis of lithium ion battery pack for electric
           vehicles
    • Abstract: Publication date: Available online 11 May 2017
      Source:CIRP Annals - Manufacturing Technology
      Author(s): Chris Yuan, Yelin Deng, Tonghui Li, Fan Yang
      Lithium ion batteries (LIB) are widely used to power electric vehicles. Here we report a comprehensive manufacturing energy analysis of the popular LMO-graphite LIB pack used on Nissan Leaf and Chevrolet Volt. A 24kWh battery pack with 192 prismatic cells is analysed at each manufacturing process from mixing, coating, calendaring, notching till final cutting and assembly, with data collected and modelled from real industrial processes. It is found that 29.9GJ of energy is embedded in the battery materials, 58.7GJ energy consumed in the battery cell production, and 0.3GJ energy for the final battery pack assembly.

      PubDate: 2017-05-13T04:30:15Z
       
  • Hybrid tool for high performance structuring and honing of cylinder liners
    • Abstract: Publication date: Available online 8 May 2017
      Source:CIRP Annals - Manufacturing Technology
      Author(s): Dominik Dahlmann, Berend Denkena
      Micro-structuring of cylinder liners reduces friction of combustion engines. However, the process time of known fly-cutting and even laser micro machining is too long. This paper presents a hybrid tool for high performance structuring and finish-honing. The structuring tool is driven by a piezo actuator. A positioning system and control algorithms were developed to overcome the limited travelling range of the piezo and to deal with workpiece errors. Furthermore, the entire process chain and machined surfaces of the liners are examined. It is shown that the structuring of common grooves is up to 6 times faster compared to laser machining.

      PubDate: 2017-05-13T04:30:15Z
       
  • Assessment of environmental performance of shaped tube electrolytic
           machining (STEM) and capillary drilling (CD) of superalloys
    • Abstract: Publication date: Available online 6 May 2017
      Source:CIRP Annals - Manufacturing Technology
      Author(s): Anjali K.M. De Silva, Janaka R. Gamage, Colin S. Harrison
      This paper presents an environmental impact assessment of two specialised electrochemical machining processes, STEM and CD, which are used for making cooling holes in turbine blades for aerospace applications. An industry friendly data collection framework was developed taking insights from CO2PE! and ISO 14044:2006 for ascertaining unit process lifecycle inventories (UPLCI). The ‘ReCiPe2008’ LCA method was used to analyse the environmental impact from a holistic point of view, the contribution from each inventory item, and the impact at the endpoint level. An uncertainty analysis was also performed to assess and improve the credibility of the findings.

      PubDate: 2017-05-08T09:52:04Z
       
 
 
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