锻压技术

汽车用6061 铝型板温冲压减薄预测模型及实验验证

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

单位：(1. 河南工业职业技术学院机械工程学院 2. 同济大学中德工程学院 3. 国电投南阳热电有限责任公司 4. 南阳长弓机械科技有限公司

分类号：TG156. 1

出版年,卷(期):页码：2023,48(1):79-84

摘要：

选择Autoform 对6061 铝型板开展模拟测试, 对比不同温冲压工艺下的板材成形性能, 构建了预测型板温成形件的减薄参数模型, 并设计了验证实验方案, 零件合格率得到显著提升。研究结果表明: 板料温度提升过程中, 型板温成形件的减薄率先降低再升高。逐渐提高压边力后, 成形件形成了更大的减薄率。提高摩擦因数后, 各点的减薄率的变化均增大。板料温度、摩擦因数、压边力均会引起减薄率的明显变化, 在三元二次回归方程基础上构建减薄预测模型。预测和实测减薄率对比结果误差的最大值与最小值分别为6. 6%与1. 4%, 说明经过修正处理的模型可以实现对危险区减薄量的准确预测。该研究为优化6061 铝板料温冲压工艺提供了理论参考。

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.

基金项目：

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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