Transactions of Materials and Heat Treatment

Title：Thinning predictive model and experimental verification on warm stamping of 6061 aluminum plate for car

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ClassificationCode：TG156. 1

year,vol(issue):pagenumber：2023,48(1):79-84

Abstract：

6061 aluminum plate was simulated and tested by Autoform, and comparing the forming properties of plates under different warm stamping processes, the model that could predict the thinning parameters of warm-formed parts for plate was constructed. Then, the verification experiment scheme was designed, and the qualified rate of parts was improved significantly. The results show that in the process of the temperature increasing for sheet metal, the thinning rate of the warm-formed parts for plate decreases first and then increases. When the blank holder force is gradually increased, the formed part forms a larger thinning rate. When the friction coefficient is increased, the thinning rates of all points increases. The sheet metal temperature, the friction factor and the blank holder force can cause the significant changes of thinning rate, and a thinning prediction model is constructed on the basis of ternary quadratic regression equation. The maximum and minimum errors of the comparison results between the predicted and actual tested thinning rates are 6. 6% and 1. 4%, respectively, indicating that the modified model can accurately predict the thinning amount in the dangerous area. This study provides a theoretical reference for optimizing the warm stamping process of 6061 aluminum alloy sheet metal.

Funds：

国家自然科学基金资助项目(51675383); 河南省科技攻关项目(182102310706); 南阳市科技攻关项目(KJGG019)

作者简介: 方　雅(1982-), 女, 硕士, 讲师 E-mail: fangya1104@ 163. com 通信作者: 户燕会(1982-), 女, 硕士, 讲师 E-mail: hyh850805@ 126. com

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