锻压技术

顶杆圆角半径对三销架冷锻成形的影响

英文标题：Influence of corner radius of knock-out pin on spider cold forging process

分类号：

出版年,卷(期):页码：2015,40(10):60-64

摘要：

三销架是球销式等速万向节的重要部件。通过Solidworks对三销架冷锻成形模具及工件进行三维建模，采用大型有限元软件Deform 3D研究了顶杆圆角半径对三销架成形缺陷的影响规律，及其对等效应力、等效应变分布和载荷-位移曲线的影响。结果表明，当顶杆上凸台直径D1为Ф24 mm、下凸台直径D2为Ф22 mm、顶杆速度为10 mm·s-1时，顶杆下圆角半径R2的增大可以减小甚至消除三销架销轴根部的成形缺陷，顶杆上圆角半径R1对三销架成形无影响，三销架的中间孔处及销轴根部的应力应变最大。提出了适用于三销架冷锻成形的顶杆圆角半径R1为2 mm，R2为10 mm，并通过实际生产进行了实验验证。
关键词：三销架；Deform 3D；顶杆圆角半径；冷锻；有限元分析

The spider is an important part of the constant velocity universal joint. 3D models of spider cold forging die and workpiece were set up by Solidworks. The influences of corner radius of knock-out pin on forming defects, equivalent stress distribution, equivalent strain distribution and load-stroke curves in the process of cold forging were investigated by a large-scale finite element analysis Deform 3D software. The results show that when top convex platform diameter D1 of knock-out pin is Ф24 mm, its bottom convex platform diameter D2 is Ф22 mm, and its speed is 10 mm·s-1, the increased bottom corner radius R2 can diminish and even eliminate forming defects of the bases of spider pins. However, the top corner radius R1 has little effect on the spider cold forging process. The maximum equivalent stress and the equivalent strain occur close to the middle hole of spider and the bases of spider pins. It is proposed for the spider cold forging that the top corner radius R1 of knock-out pin is 2 mm and the bottom corner radius R2 of knock-out pin is 10 mm, which is verified by actual experiments.

基金项目：

江苏省自然科学基金资助项目（BK2012594、BK20131144）；常州市科技局项目（CZ20130021）

魏坤霞（1973-），女，硕士，副教授

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