Transactions of Materials and Heat Treatment

Title：Research on box-drawing based on variable blank-holder force

Authors： Li Lin Chen Zhongjia Li Qi Liu Zhifeng

Unit： Hefei University of Technology

KeyWords： rectangular box partition variable blank-holder force (VBHF) orthogonal experiment

ClassificationCode：TU 411.01

year,vol(issue):pagenumber：2016,41(2):25-29

Abstract：

For the rectangular box, the blank-holder was segmented into the corner area and the straight side area based on the forces acting on it. The forming process of rectangular box was analyzed by DYNAFORM, and the objective function was established to evaluate the forming quality. Furthermore, the drawing process with variable blank-holder force was studied by orthogonal test. The five different positions 0，10，20，25 and 30 mm were selected in the drawing process, their BHF values were regarded as five factors of orthogonal test. The five-factor and four-level orthogonal test was carried out. The comprehensive index 5.170 is obtained by simulation on the blank-holder force curve optimized from orthogonal test, which is less than the minimum value 5.465 produced by constant BHF mode. The results of experiments show that partition VBHF changing with the position and process can effectively prevent the occurrence of wrinkling and fracture, and the forming quality of stainless steel rectangular box can be ensured.

Funds：

国家自然科学基金资助项目（51135004）

李琳（1989-）, 女, 硕士研究生陈忠家（1972-）, 男，博士，教授

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