锻压技术

螺塞复合挤压的材料分配规律研究

英文标题：Research on material distribution law in combined extrusion process of screw plug

作者：孙见奇雷君相马晓峰

关键词：复合挤压等应变分流层

分类号：TG13

出版年,卷(期):页码：2013,38(2):65-68

摘要：

针对螺塞零件复合挤压时的材料分配规律进行研究，推导出圆杯正六边形杆复合挤压的材料分配公式，提出材料分流层的形状是旋转抛物面。应用Deform软件对螺塞零件的挤压成形进行数值模拟，得到成形应力图和挤压力行程曲线，研究发现，螺塞的成形过程实际上分为2个阶段：复合挤压和反挤压。最终进行产品试制，试验结果表明：正反挤两个出口高度的实际数值和理论值吻合较好。

Based on the study of the law for material distribution in combined extrusion process of the screw plug, a new formula of material distribution for roundcup/hexagonal-rod combined extrusion was educed, and the dividing flow section pattern was presented to be a paraboloid of revolution. And then, a forming numerical simulation for screw plug with Deform was performed. A forming stress diagram and a pressure-stroke curve were obtained. The forming process of screw plug was actually divided into two phases: the combined extrusion and the backward extrusion. Finally, a trial-production was performed. The two actual values of forward extrusion exit and backward extrusion exit were obtained. These actual values are coincided with the theoretical value.

基金项目：

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