Transactions of Materials and Heat Treatment

Title：Stamping process and drawing die design of upper plate for the front subframe

Authors： Lin Quan Liu Chi

Unit： Liuzhou Vocational & Technical College

KeyWords： upper plate of front subframe stamping process drawing die

ClassificationCode：

year,vol(issue):pagenumber：2015,40(4):45-48

Abstract：

The upper plate of car front subframe of 3.5 mm thickness has complicated variation and contoured surface, and it is difficult to form because the assembly accuracy requirement between assembly hole and other parts is high. In the design, five processes of stamping were formulated，and the drawing process was the most important forming process. Its key technology was to adopt the craft convex hull to prevent cracking from the corner during drawing process. For the problems of large thickness of material，complicated shape and difficulty in inflowing of material for upper plate of the front subframe, the drawbeads were not set on the inside or outside blank holder, so that the forming can be carried out smoothly. The forming process of upper plate was simulated by AutoForm software，and the optimized drawing process model was obtained through adjusting the binder surface, addendum surface, rounded, sheet shape and blank holder force repeatedly. Therefore, the qualified products were produced, and the effectiveness of stamping process improvement was verified.

Funds：

2012年度广西教育厅项目:汽车类特大型厚板成型模开发实践（201203Y13196）

林泉 (1973-)，女，硕士，讲师

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