Transactions of Materials and Heat Treatment

Title：Influence of blank holder force on forming quality during blanking

Authors： Yue Xuehu Fan Yujin Zheng Huaihe Wu Jiaxi

Unit： Kunming University of Science and Technology Kunming Kunkai Special CNC Equipment Limited Liability Company China Ship Heavy Industries 750 Test Site

KeyWords： blanking blank holder force forming quality cross section contour DEFORM-3D

ClassificationCode：TG386.2

year,vol(issue):pagenumber：2018,43(4):53-59

Abstract：

The equivalent stress, equivalent strain and material flow characteristics during the blanking process of stainless steel 304 sheet were finite element simulated by software DEFORM-3D, and the influences of deformation process and blank holder forces of sheet metal on the cross section contour during the blanking process were studied under different blank holder forces. Then, the blanking force versus stroke curve and the cross section drawing of blanking pieces during the blanking process of sheet metal were gained. Through the MATLAB software fitting analysis, when the blank holder force acting on the sheet metal is small, the fillet belt length, width, taper and burr length decrease with the increasing of blank holder force, but when the blank holder force acting on the sheet metal exceeds a critical value, the fillet belt length, width, taper and burr length increase with the increasing of blank holder force. Finally, the finite element simulation results were verified by experiments, and the appropriate blank holder force should be selected to improve the cross section quality of blanking pieces in the actual production.

Funds：

昆明理工大学分析测试基金（2017M20162103009）

岳学虎（1992-），男，硕士研究生；E-mail：timeyuehu@163.com；通讯作者：樊瑜瑾（1962-），男，博士，教授；E-mail：fanyujinkmust@163.com

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