锻压技术

某轿车底盘车架弯管弯制过程的起皱缺陷分析与优化

英文标题：Analysis and optimization on wrinkling defect in bending process for a car chassis frame bending pipe

作者：胡晓尹晶晶汪创伟王飞龙

关键词：底盘车架酸洗板弯管起皱 SIGMA分析

分类号：TG386.43

出版年,卷(期):页码：2022,47(9):112-117

摘要：

针对某轿车底盘车架弯管弯制过程出现的起皱问题，基于Autoform软件SIGMA模块分析了材料参数对起皱缺陷的影响，确定了材料方面对起皱缺陷影响比较敏感的参数，进而指导材料改进。主要分析了S355MC钢酸洗板材料的屈服强度、抗拉强度、r90和摩擦因数对起皱缺陷的影响。仿真结果显示：屈服强度和抗拉强度对弯管起皱缺陷的影响较大，摩擦因数和r90对起皱缺陷几乎没有影响，降低屈服强度和屈强比对控制起皱缺陷有利。通过加入适量的Cr和调整卷取温度等工艺措施，有效地降低了S355MC钢酸洗板材料的屈服强度和屈强比，平均屈服强度为374.1 MPa，平均屈强比在0.73以下。通过降低材料的屈服强度和屈强比，成功地解决了弯管的起皱问题。

Aiming at the wrinkling problem in the bending process of a car chassis frame bending pipe，based on SIGMA module of Autoform software, the influence of material parameters on wrinkling defect was analyzed, and the parameters of material which were sensitive to wrinkling defect were determined, so as to guide the material improvement. The influence of yield strength, tensile strength, r90 and friction factor on the wrinkling defect for S355MC steel pickling sheet material was analyzed. The simulation results show that the yield strength and tensile strength have a great influence on the wrinkling defect of bending pipe, while the friction factor and r90 have almost no influence on the wrinkling defect. It is beneficial to reduce the yield strength and the yield strength ratio to control the wrinkling defect. By adding an appropriate amount of Cr and adjusting the coiling temperature, the yield strength and the yield strength ratio of S355MC steel pickling sheet material are effectively reduced. The average yield strength is 374.1 MPa, and the average yield strength ratio is below 0.73. By reducing the yield strength and the yield strength ratio of the material, the wrinkling problem of bending pipe is successfully solved.

基金项目：

胡晓（1990-），男，硕士，工程师 E-mail：hgdxiaohu@163.com

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