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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。
Extruder spindle system is the main part of the continuous extrusion machine, if the theoretical design of the spindle size, its service life is guaranteed, but the actual production, the spindle often broken phenomenon, the design does not meet the use life. Based on the analysis of the technical characteristics of the spindle system, the finite element model of the spindle system of the TLJ 400 continuous extruder was set up to simulate the stress during the operation of the spindle system of the continuous extruder. Equivalent stress of components and contact stress between them. The results show that the conditions of the squeeze wheel near the block are the worst in all parts of the spindle system, and the equivalent stress is as high as 1540 MPa. Extrusion wheel and the inner sleeve contact shear stress larger, the maximum value of 79.5 MPa, the contact surface normal stress and shear stress ratio are less than the static friction coefficient.