基于有限元法优化离合器毂体壳模锻工艺

Optimization of Die Forging Process for Clutch Shell Based on Finite Element

离合器毂体壳是一带有内外台阶深筒件,锻造成形难度大。依据深筒件的几何特征,利用轴对称有限元模拟分析方法对其锻造成形过程进行了模拟,证明了利用开式模锻成形时,在深筒部位充不满;提出先锻造预制坯来合理分布终锻模膛中坯料金属,然后再开式模锻的成形方案;分析了在成形过程中预制坯形状和倾斜角度是产生充不满和折叠的原因;通过分析,得出了在终锻成形过程中不会产生折叠和充不满的预制坯的形状及角度范围,其范围是11.3°～20.5°和32.9°～45.0°。其结果为优化工艺设计,缩短产品试制周期,生产出合格质量的锻件提供了科学依据。

Clutch shell is a deep sleeve parts with inside and outside step, so its forging and forming is veIy difficult. On basis of its geometry characteristic, the forming process of deep sleeve parts by axial symmetry t-mite element simulation analysis method was simulated. The simulation results displayed that using the technology of open die forging, the deep sleeve position was not full; a scheme was suggested, that it is, firstly forging prefabricating workpiece to distribute reasonable blank metal in final forging die, and then using open die forging; the analysis showed that prefabricating workpiece＇s shape and incline angle scope is the key factor to cause underfill and folding during the forming process; the simulation results displayed the prefabricating workpiece shape and angle scope that didn＇t cause underfill and folding, the angle scopes are 11.3°-20.5° and 32.9°-45.0°, which provided a scientific basis to optimize process design, reduce production period and produce eligible forgings.