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International Journal of Automotive Technology > Volume 20(S); 2019 > Article
International Journal of Automotive Technology 2019;20(S): 45-56.
OPTIMAL PROCESS DESIGN IN HOT FORGING IN TERMS OF GRAIN FLOW QUALITY
Min Cheol Kim1, Suk Hwan Chung2, Man Soo Joun1
1Gyeongsang Nation University
2MFRC
PDF Links Corresponding Author.  Man Soo Joun , Email. msjoun@gnu.ac.kr
ABSTRACT
With the improvement in the accuracy of simulation and computation time, the need for the application of optimization technique in designing process parameters is increasing and is being realized in some fields. However, two obstacles are still preventing the optimization technique from being practically used in forging process. The one is the lack of quantification technique of grain flow quality and the other is difficulty in treating 3 dimensional die shape as design parameters. In this study, 3 kinds of quantification technique of grain flow quality, the overlapping index, cutting index and locally sinking index, are introduced based on the relation between grain flow and product quality. Also, a methodology of treating 3 dimensional die shape as the design parameters is introduced using discretized finite element model.
Key Words: Optimal design, Forging, Grain flow lines, Quantification of grain flow quality, Parameterization of die geometry
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