Transactions of Materials and Heat Treatment

Title：Principles of part geometry design applied for hot stamping? process

Authors： Gui Zhongxiang Zhu Bin Zhang Yisheng

Unit： The 38th Research Institute of CETC Hefei 230088 Huazhong University of Science and Technology

KeyWords： hot stamping deep drawing flanging forming defects part geometry design contact timing temperature gradient

ClassificationCode：TG386

year,vol(issue):pagenumber：2016,41(8):24-28

Abstract：

Based on analysis of hot stamping characteristics and production practice, processing principles of the part geometry design applied for hot stamping were presented. The forming sequence of part should be completed within a single hot stamping stroke. The flange height and curvature were decreased, the hole flanging was avoided, and the design of wider flange and deeper drawing (D>3d, h≥2d) were excluded as much as possible. Deep drawing fillet radius was R≥5t, while slope sidewall α≥93°. Sharp transition of the cross-sectional geometry was deprecated to reduce the asymmetry. Then, the overall geometrical structure was designed as open, and the curvature along the length direction of part was reduced. At last, the application of these principles in the design and production of hot-stamped parts was illustrated with examples.

Funds：

国家自然科学基金资助项目（51275185）；国家自然科学基金青年科学基金资助项目（51405171）

桂中祥（1985-），男，博士，工程师

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