锻压技术

轿车连杆热锻模具结构设计改进

英文标题：Structure design improvement of hot forging die for automobile connecting rod

作者：刘雅辉刘淑梅于秋华

单位：上海工程技术大学

分类号：TG312

出版年,卷(期):页码：2014,39(3):108-112

摘要：

基于Deform软件对轿车连杆热锻工艺进行有限元模拟，研究锻模结构对连杆折叠缺陷的影响。用原始锻模进行有限元模拟，结果表明：原始锻模的中心飞边仓深度、两模膛的中心距和旋转角均太大，导致连杆小端出现严重的折叠缺陷。通过移除连杆锻模的中心飞边仓、改变模膛中心距和旋转角的大小，对轿车发动机连杆的锻模结构设计进行改进。利用改进后的模具进行数值模拟，结果表明：锻件无折叠缺陷，金属的侧向流动更加合理，连杆的预锻成形载荷大幅降低。实际热模锻后得到了无缺陷的连杆锻件。

Finite element simulation was performed for hot forging process of automobile engine connecting rod based on Deform software to study the impact of forging die structure on the rod folding defects. Using original forging die for FE simulation, the results show that the center flash gutter depth of the original die and the center distance and rotation angle of two chambers are too big, which lead to severe folding defects at small end of connecting rod. By removing the center flash gutter and changing the center distance and rotation angle of die chambers, the structural design of connecting rod forging dies is improved. Using improved forging die for FE simulation, the results show that the folding defects of forging are reduced, the lateral flow of metal is more reasonable,and the load of pre-forging is significantly reduced. Forging rods without defects were also obtained in actual production.

基金项目：

上海工程技术大学研究生科研创新资助项目(13KY0516)

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