Transactions of Materials and Heat Treatment

Title：Research and optimization of the excessive thinning for sheet forming based on finite element analysis

Authors： Wang Tiefeng Lin Xiankun Qin Wendong Huang Xingqiong

Unit： Guangxi University of Science and Technology Wanxiang Qianchao Transmission Shaft Co. Ltd.

KeyWords： engine shroud of automobile drawing forming thinning rate wrinkle autoform

ClassificationCode：TG386.41

year,vol(issue):pagenumber：2014,39(12):151-155

Abstract：

For the excessive thinning and wrinkling defects in the stamping process of the hot-dip aluminum-coated steel sheet, the thickness of the sheet was measured for engine shroud of automobile formed, and the stamping process was simulated by the finite element analysis with Autoform software. The thinning rate was selected as the optimization goal, meanwhile friction coefficient, blank holder force, drawbeads, drawing factor and other parameters were optimized. Research results show that the thinning rate of sheet declines after optimization, and the maximum thinning rate decreases from -29.75% to -25.71% which reaches the requirement of the part thinning rate from 5% to -26%. The effect of optimization is evident. After optimization, the friction coefficient decreases from 0.135 to 0.1328, drawing coefficient decreases from 0.5 to 0.415, BHF increases from 100 kN to 114.315 kN. Thus, the stamping process of the hot-dip aluminum-coated steel sheet is improved by the finite element simulating optimization, and effectively in preventing defects produced in steel stamping process.

Funds：

广西柳州市科学研究与技术开发计划项目(2013G010601)；广西自然科学基金资助项目(2012GXNSFAA053208)；广西区教育厅立项项目(LX2014197)；广西科技大学科学基金资助项目(校科自1307120)

汪铁丰（1990-），男，硕士研究生;通讯作者：林贤坤(1976-)，男，博士，副教授

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