基于Deform液压缸筒成形滚柱与滚珠的滚压对比研究

Comparative study of roller rolling and ball rolling for hydraulic cylinder based on Deform

通过实际生产并结合Deform软件仿真模拟,从滚压力、等效应力、应变、温度场及滚压量等方面对比分析了滚柱滚压和滚珠滚压的区别,结果表明:滚柱滚压和滚珠滚压规律类似,滚压力呈现波动状态,滚珠滚压力大于滚柱滚压力;2种滚压等效应力变化范围比较接近,但滚珠滚压时缸筒内壁承受较高等效应力的区域比滚柱滚压大;应变主要发生在缸体内壁表层,缸体心部没有应变;滚珠滚压比滚柱滚压局部温度高,但前者温度只分布在缸筒内壁表层,未向外壁扩散,而滚柱滚压使缸筒整体温度都上升;滚珠滚压缸筒内径变化量更小,加工效率更高。

Combined the actual production with Deform software simulation, the differences between roller rolling and ball rolling were analyzed from the aspects of rolling force, equivalent stress, strain, temperature field and rolling amount. The results showed that the roller rolling and ball rolling laws were similar, the rolling force was fluctuating, and the ball rolling force was greater than the ball rolling force. Both of the rolling equivalent stress variation ranges were relatively close, but the area with higher equivalent stress on the inner wall of the cylinder by ball rolling was wide. The strain mainly occurred on the inner wall surface of the cylinder, while there was no strain in the center. The local temperature of parts by ball rolling was higher than roller rolling, but the former temperature was only distributed on the surface of the inner wall, it didn't diffuse to the outer wall. The temperature of the cylinder was overall risen by roller rolling. The change of the internal diameter of the cylinder was smaller by ball rolling.