Transactions of Materials and Heat Treatment

Title：Controlling technology of blank holder force in the drawing process of printing aluminium cover based on Dynaform

Authors： Xian Xiaohong

Unit： Sichuan Vocational and Technical College

KeyWords： printing aluminium cover stamping drawing blank holder force Dynaform

ClassificationCode：TG386.3+2

year,vol(issue):pagenumber：2016,41(10):152-157

Abstract：

The wrinking and cracking are the two main defects of the printing aluminium cover in the drawing process，so the proper blank holder force plays an important role to prevent wrinkling and cracking. In practice, the proper blank holder force was usually obtained by theoretical calculation and die adjustment. However, the theoretical calculation method has complex calculation and poor operability and the die adjustment is complicated and time-consuming. Based on nonlinear finite element analysis software Dynaform，the printing aluminum cover drawing process and blank holder force were numerically simulated and theoretically analyzed to determine a reasonable range of blank holder force. And then the optimum blank holder force was confirmed by drawing experiment based on this range. The results show that the reasonable range of blank holder force during the first drawing for 1716 printing aluminum cover is 7-8.8 kN, and the ideal blank holder force is about 8.8 kN. The method reduces the blindness of blank holder force adjustment, shortenes the die adjustment time and reduces the die adjustment difficulty. At last, the manufacturing cost of product was reduced.

Funds：

四川省教育厅自然科学基金资助项目（15ZA0347）

作者简介：鲜小红（1967-），男，学士，副教授 E-mail：xianxh123@126.com

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