锻压技术

圆管内翻边成形的数值模拟及参数优化管材成形

英文标题：Numerical simulation and parameter optimization on inward flanging for tube

作者：赵洋肖洋戴鹏瞩邓华超马莹

分类号：TG386

出版年,卷(期):页码：2020,45(1):80-88

摘要：

以摩托车减震器一翻边成形部件为研究对象，建立圆管内翻边的有限元模型，利用数值模拟方法，分析翻边过程中应力、应变和冲击力的变化。该部件在翻边过后，圆管端缘存在由于变形堆积而起皱的缺陷，针对该缺陷选取圆管不同的结构参数以及凸模的外形，建立不同工况下的有限元模型并对比分析翻边结果。结果表明，当圆管壁厚减小值d取0.25 mm、凸模角度θ为75°时，翻边后的圆管端缘起皱情况得到较好改善，凸模冲击力降低。最后，根据参数化分析结果确定凸模上移余量在0~0.03 mm范围内时，损耗比可控制在5%以下。

For the flanging forming part of motorcycle shock absorber, the finite element model of inward flanging for tube was set up, and the changes of stress, strain and impact force in the flanging process were analyzed by numerical simulation. After flanging of part, the wrinkling occurred at the end edges of tube due to the deformation accumulation. Based on the different structure parameters of tube and shapes of punch, the various finite element models under different working conditions were established, and the flanging results were compared and analyzed. The results show that when the reduction of wall thickness d is 0.25 mm and the punch angle θ is 75°, the wrinkling at the end edges of tube is improved well and the impact force of punch is reduced after flanging. Finally, according to the results of parametric analysis, the loss ratio is controlled below 5% when the upward displacement margin of punch is in the range of 0-0.03 mm.

基金项目：

国家自然科学基金资助项目（51807019）；重庆市基础与前沿研究计划项目(cstc2016jcyjA0443)；重庆市教委科学技术研究项目（KJQN201900632）

作者简介：赵洋（1988-），男，博士，副教授 E-mail：zhaoyang@cqupt.edu.cn 通讯作者：马莹（1985-），女，博士，讲师 E-mail：samecqupt@163.com

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