Transactions of Materials and Heat Treatment

Title：Process optimization and numerical simulation of multi-stage cold heading for railway screw spike

Authors： Xiao Zhiling Liu Baixuan Liu Hua Sun Hongxing Liu Dan Wang Tao Zhang Yishuai

Unit： Zhengzhou Research Institute of Mechanical Engineering Zhengzhou University

KeyWords： screw spike multi-stage cold heading process optimization numerical simulation

ClassificationCode：TG316.1+1

year,vol(issue):pagenumber：2014,39(2):79-83

Abstract：

There were many alternative processes of railway screw multi-stage cold heading to get the optimal technological scheme. Using the optimization mathematical model and Deform-3D simulation method，the load-stroke curves and variation laws of important simulated parameter values were discussed, which were took into the process optimization mathematical model. The results show that for the first scheme the deformation degree of cold forming process is properly distributed; the maximum damage and the strain values increase with the increasing of station deformation degree, and reach the maximum when forming the six angular head. The optimal scheme was calculated and the compose fatigue strength tests of anchor screws reached three million times.

Funds：

国家科技重大专项资助项目“高档数控机床与基础制造装备”（2013ZX04002081）

肖志玲（1983-），女，博士研究生

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