锻压技术

基于Dynaform的凸缘圆筒件拉深工艺有限元分析

英文标题：Finite element analysis on drawing process for cylinder parts with flange based on Dynaform

作者：于传浩张毅

单位：武汉工程大学

分类号：TG386. 1

出版年,卷(期):页码：2022,47(2):56-61

摘要：

针对带凸缘圆筒件在拉深试模生产中出现的凸缘起皱、零件拉裂问题，通过Dynaform软件对圆筒件的拉深成形过程进行建模与仿真计算，根据模拟结果预测了可能出现缺陷的区域，分析了影响圆筒件成形效果的关键因素。为消除缺陷，研究了压边力、拉深速度、摩擦因数、凸凹模间隙4个因素对凸缘起皱及最大减薄率的影响。以工件最大减薄率最小为目标，采用正交试验方法，获得了各影响因素对厚度指标的关键程度，并结合影响趋势图获得了最优工艺参数组合，即压边力为700 kN、拉深速度为5500 mm·s-1、摩擦因数为0.100、凸凹模间隙为2.10 mm。试模后获得了合格的产品，凸缘起皱、零件拉裂问题得到明显改善，有限元模拟结果正确可靠，具有一定的借鉴性。

For the problems of flange wrinkling and part cracking in the test die production of drawing for the cylinder parts with flange, the drawing process of cylinder parts was modeled, simulated and calculated by software Dynaform. According to the simulation results, the possible defect areas were predicted, and the key factors affecting the forming effect of cylinder parts were analyzed. In order to eliminate the defects, the influences of blank holder force, drawing speed, friction coefficient and clearance between punch and die on the flange wrinkling and the maximum thinning rate were studied. The aim was to minimum the maximum thinning rate of workpiece, the key degrees of various influencing factors on the thickness index were obtained by orthogonal test method, and combined with the influence trend diagram, the optimal combination of process parameters was obtained as the blank holder force of 700 kN, the drawing speed of 5500 mm·s-1, the friction coefficient of 0.100, and the clearance between punch and die of 2.10 mm. After the test die, the qualified products were obtained, and the flange wrinkling and part cracking problems were obviously improved. Thus, the finite element simulation results are correct and reliable, which has a certain reference.

基金项目：

国家自然科学基金青年科学基金项目（51605343）

作者简介：于传浩（1972-），男，硕士，副教授,E-mail：yuchuanhao147@163.com

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