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http://dx.doi.org/10.3795/KSME-A.2002.26.7.1366

Experimental Investigation on the Flow Control in Forward-Backward Extrusion of Piston-Pin for Automobile  

Park, Jong-Nam (부산대학교 일반대학원 정밀기계공학과)
Park, Tae-Joon (부산대학교 일반대학원 정밀기계공학과)
Kim, Dong-Hwan (부산대학교 정밀정형 및 금형가공연구센터)
Kim, Byung-Min (부산대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.26, no.7, 2002 , pp. 1366-1375 More about this Journal
Abstract
In cold forging of piston-pin for automobile parts, the flow defect appears by the dead metal zone. This appearance evidently happens in products with a thin piercing thickness for the dimension accuracy and the decrease of material loss. The best method that can prevent flow defect is removing dead metal zone. The purpose of this study is to investigate the material flow behavior of forward-backward extruded piston-pin through the relative velocity ratio and the stroke control of upper moving punch & container using the flow control forming technique. The finite element simulations are applied to analyse the flow defect, then the results are compared with the plasticine model material experiments. The model experiment results are in good agreement with the FE simulation ones.
Keywords
Flow Control Forming; Piston-Pin; Flow Defect; Forward-Backward Extrusion; Model Material Experiment;
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