锻压技术

台阶沉头孔的冲锻复合成形工艺

英文标题：Stampingforging compound forming process of step hole

作者：杨程梁凡杨欣怡谢晓东朴永日

分类号：TG316

出版年,卷(期):页码：2018,43(10):22-29

摘要：

为了获得台阶沉头孔，基于冲锻复合成形技术，提出了一步冲锻法、锻-冲法和冲-锻-冲法3种台阶沉头孔的成形方法。采用有限元模拟获得了3种方法的行程-载荷曲线、等效应力应变分布以及材料流动规律。结果表明：冲-锻-冲法成形台阶沉头孔时最大载荷为85818 N，比一步冲锻法小20%，比锻-冲法小16%；等效应力范围为350~1120 MPa，变形更均匀；工件台阶孔的上直角部位材料向外流动0.3 mm，工件宽度增大0.3 mm，比一步冲锻法和锻-冲法的材料向外流动的位移小，工件变形小。按照模拟获得的冲-锻-冲法进行沉头孔的成形实验，可以获得尺寸合格、变形均匀的台阶沉头孔。

In order to obtain step hole, based on the stampingforging compound forming technology, three kinds of forming methods for step hole were put forward, namely, onestep stampingforging method, forgingstamping method and stampingforgingstamping method, and their strokeload curve, equivalent stress and strain distribution and material flow law were obtained by finite element simulation respectively. The results show that when the step hole is produced by the stampingforgingstamping method, the maximum load is 85818N, which is 20% smaller than that produced by the onestep stampingforging method and 16% smaller than that produced by the forgingstamping method. The deformation is more uniform under the equivalent stress range of 350-1120 MPa, the material outward flow displacement in the upper right angle of the step hole is 0.3 mm, and the width of workpiece increases 0.3 mm, which are smaller than these produced by the onestep stampingforging method and the forgingstamping method. Thus, according to the simulation results, the forming experiment is conducted by the stampingforgingstamping method, and the step hole with qualified size and uniform deformation is obtained.

基金项目：

陕西省教育厅专项（16JK1462）；陕西省耐磨材料工程技术研究中心专项（2016NMZX07）

杨程（1976-），男，博士，副教授，E-mail：yang.cheng@stu.xjtu.edu.cn

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