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http://dx.doi.org/10.5228/KSPP.2003.12.2.116

A Study on the Design of Prestressed Die using Flexible Tolerance Method  

Hur, K.D. (동의대학교 기계.산업시스템공학부 기계공학전공)
Choi, Y. (인제대학교 기계자동차공학부)
Yeo, H.T. (동의대학교 일반대학원 기계공학과)
Publication Information
Transactions of Materials Processing / v.12, no.2, 2003 , pp. 116-122 More about this Journal
Abstract
In the Prestressed die design for cold working, many constraining conditions should be considered to insure the die safety and to improve the dimension accountancy products. Among the constraining conditions, yielding conditions, diameter ratios and interferences between rings are very important. . In this paper, therefore, flexible tolerance method was used in order to search the optimum values of design variables. The maximum inner pressure is used as objective function in this numerical analysis. In the design Process, it was also involved the safety factor to the yield strength of each ring by considering the allowable tensile or compressive hoop stress in each ring. The proposed technique has been applied to the die design of backward extrusion process, and it's analytical results have been compared with that of the conventional design method.
Keywords
Flexible Tolerance Method; Prestressed Die; Diameter Ratio; Interference;
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