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FE analysis of multi-cycle micro-forming through using closed-die upsetting models and forward extrusion models

Pan, W. and Qin, Y. (2008) FE analysis of multi-cycle micro-forming through using closed-die upsetting models and forward extrusion models. Journal of Materials Processing Technology, 201 (1-3). pp. 220-225. ISSN 0924-0136

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Abstract

Research in micro-forming leads to the investigation of the effects of heat generation in the workpiece and temperature changes in the tools during the forming. The results reported in this paper relate to the study of cold micro-forming processes which are usually ignored on its thermal characteristics. Two closed-die upsetting models were used for the simulation of the forming of micro-parts in single forming trial and in mass production (multi-cycle loading), respectively. An elastic-plastic finite element simulation was performed for a single forming trial. The heat transferred to the die, computed from the simulation, was then used as an input for the multi-cycle heat loading analysis in the die. Two materials: silver and low carbon steel, were used as the work material. The results show that the die saturation temperature could still go up to 100 °C for small size dies, which is significant for the forming of micro-parts. Forming errors due to the die-temperature changes were further computed, which forms a basis for developing considerations on the forming-error compensation. Using the same methods and procedures, forming of a micro-pin via forward extrusion was analysed.

Item type: Article
ID code: 9459
Keywords: FE analysis, multi-cycle micro-forming, closed-die upsetting models, forward extrusion models, Mechanical engineering and machinery, Manufactures, Metals and Alloys, Modelling and Simulation, Ceramics and Composites, Industrial and Manufacturing Engineering, Computer Science Applications
Subjects: Technology > Mechanical engineering and machinery
Technology > Manufactures
Department: Faculty of Engineering > Mechanical and Aerospace Engineering
Faculty of Engineering > Design, Manufacture and Engineering Management
Depositing user: Strathprints Administrator
Date Deposited: 21 Feb 2010 14:21
Last modified: 21 May 2015 10:39
URI: http://strathprints.strath.ac.uk/id/eprint/9459

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