锻压技术

TLJ 400连续挤压机主轴系统性能有限元分析

英文标题：Finite elements analysis on main shaft system of continuous extrusion machine TLJ 400

作者：孙炳晓樊志新陈吉光孙野

单位：大连交通大学

分类号：

出版年,卷(期):页码：2014,39(10):98-102

摘要：

挤压机主轴系统是连续挤压机中主要工作部分,若按理论设计得到的主轴尺寸,其使用寿命是有保证的,但实际生产中,主轴经常有断裂的现象,达不到设计的使用寿命。在分析主轴系统的技术特点上，对TLJ 400连续挤压机主轴系统建立了有限元模型，对连续挤压机主轴系统工作过程中的受力进行了计算机仿真，得出了主轴系统工作时各部件的等效应力及其之间的接触应力。结果表明，主轴系统各部件中挤压轮上接近挡料块部位工况最为恶劣，等效应力高达1540 MPa。挤压轮与内侧轴套接触切应力较大，最大值为79.5 MPa，各接触面正应力与切应力的比值均小于静摩擦系数。

The main shaft system is the key working structure of continuous extrusion machine. If the size of the main shaft is designed theoretically, its service life will be guaranteed. But the shaft system is often broken,so it can not reach the service life in practical production. According to the analysis on technical features of the main shaft system, the FEM model of the system was established. By simulating the force situation during working process of the continuous extrude machine, the Von-Misses stress of components and the contact stress between them during working process of main shaft system were calculated. The results show that the working condition of the component which is near the stopper in the extrusion wheel is the worst, whose Von-Mises stress is up to 1540 MPa.The contact shear stress between the extrusion wheel and inner liner is larger，whose maximum value is up to 79.5 MPa. Both the ratio of contact normal stress and contact shear stress on every contact surface is smaller than static fiction coefficient.

基金项目：

国家科技支撑计划（2011BAE23B01）

孙炳晓（1988-），男，硕士研究生

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