锻压技术

基于正交试验与响应面法汽车转向节模具结构优化

英文标题：Structural optimization on automobile steering knuckle mold based on orthogonal test and response surface method

作者：胡祚庥刘淑梅毛欣然

单位：上海工程技术大学

分类号：TG316

出版年,卷(期):页码：2022,47(8):178-184

摘要：

以某汽车转向节为研究对象，使用Deform-3D有限元软件进行热锻成形数值模拟，通过分析金属填充效果发现转向节在长枝叉处出现塌角缺陷。针对此缺陷设计阻力墙结构，利用正交试验筛选出对于转向节的预锻成形载荷与飞边长度影响显著的结构因素,依次为阻力墙斜度D、阻力墙间隙C和阻力墙宽度G，确定了桥边宽度为15 mm，阻力墙高度为25 mm，阻力墙圆角半径为15 mm,再利用响应面法，建立了阻力墙间隙C、阻力墙斜度D和阻力墙宽度G与预锻成形载荷Z1和飞边长度Z2的二阶响应面模型，从而获得最优阻力墙参数组合为：阻力墙间隙为2.5 mm、阻力墙斜度为13°、阻力墙宽度为44 mm，实际生产结果表明，该阻力墙结构设计合理，锻件充填完整，未出现塌角缺陷。

For the automobile steering knuckle, the hot forging was simulated numerically by finite element software Deform-3D, and the stepping angle defect of steering knuckle at the long fork was found by analyzing the metal filling effect, Then, in view of this defect, the resistance wall structure was designed, and the significant structural factors affecting pre-forging load and flash length of steering knuckle were screened out by the orthogonal test, namely, slope of resistance wall D, clearance of resistance wall C and width of resistance wall G. Furthermore, it was determined that the width of bridge side was 15 mm, the height of resistance wall was 25 mm and the fillet radius of resistance wall was 15 mm, and the quadratic response surface model for clearance of resistance wall C, slope of resistance wall D, width of resistance wall G and pre-forging load Z1 and flash length Z2 was established by the response surface method to obtain the optimal resistance wall parameter combination with the resistance wall clearance of 2.5 mm, the resistance wall slope of 13°and the resistance wall width of 44 mm. The actual production results show that the structural design of resistance wall is reasonable, and the forgings are filled completely without stepping angle defect.

基金项目：

作者简介：胡祚庥（1995-），男，硕士，E-mail：15320505446@163.com；通信作者：刘淑梅（1968-），女，硕士，副教授，E-mail：1814618623@qq.com

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