锻压技术

锆合金条带冲压成形的多目标工艺优化

英文标题：Optimization on multi-objective process for zirconium alloy strip stamping

单位：1.湖南交通职业技术学院机电工程学院 2.湖南大学机械与运载工程学院 3.湖南工商大学智能工程与智能制造学院 4.国核宝钛锆业股份公司

分类号：TG386

出版年,卷(期):页码：2023,48(7):93-99

摘要：

为了降低锆合金条带冲压时的减薄开裂风险，针对条带级进冲压时其特征成形具有相同的冲压速度、压边力与摩擦因数的特点，建立条带的简化有限元模型，并通过物理试验对有限元模拟的准确性进行验证。利用支持向量机分别建立条带弹簧与刚凸特征的减薄率预测模型，针对条带整体成形减薄这一多目标问题，基于非支配排序遗传算法和熵权TOPSIS法，求得3种润滑条件下的Pareto前沿解和对应工艺参数的综合排序。结果表明：条带的刚凸特征相较于弹簧特征的减薄率对工艺参数的变化更敏感；不同润滑条件时条带的最优冲压工艺差异明显；常用无润滑条件下，冲压速度为134.41 mm·s-1、压边力为7862 N时，条带级进冲压具有最小的减薄开裂风险。

In order to reduce the risk of thinning and cracking during stamping for zirconium alloy strips, for the strip progressive stamping, its feature forming has the same stamping speed, blank holder force and friction coefficient, a simplified finite element model of strip was established, and the accuracy of finite element simulation was verified by physical test. Then, support vector machine was used to establish thinning rate prediction models for strip spring and rigid convexity feature respectively, and aiming at the multi-objective problem of overall strip thinning during forming process, based on non-dominated sorting genetic algorithm and entropy weight TOPSIS method, the Pareto front solutions and the comprehensive ordering of corresponding process parameters under three lubrication conditions were calculated. The results show that the thinning rate of rigid convex feature for strip is more sensitive to the change of process parameters than that of spring feature, and the optimum stamping process of strip varies obviously under different lubrication conditions. Thus, under the common no-lubrication condition, when the stamping speed is 134.41 mm·s-1 and the blank holder force is 7862 N, the strip progressive stamping has the minimum risk of thinning and cracking.

基金项目：

湖南省教育厅资助科研项目（22C0951）

作者简介：袁佳健（1991-），男，硕士，工程师 E-mail：danny66163@163.com 通信作者：毛建中（1963-），男，博士，教授 E-mail：maojianzhong66@163.com

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