旋轮参数对盘形件轮缘多工步旋压锻造增厚的影响

Influence of spinning wheel parameters on thickening for rim of disc-shaped part by multi-step spinning forging

针对此类变厚度盘形件,设计了4工步旋压锻造成形工艺。通过有限元模拟技术,分析了旋压锻造成形过程,研究了旋轮的型槽尺寸参数(上倾角α,槽底圆角半径R,以及型槽深度l)对成形稳定性以及轮缘截面流线的影响;逐步优化了每工步的旋轮型槽参数,得到了最佳的工艺参数组合,并进行了工艺实验验证。研究结果表明:优化的参数组合能够获得较好的成形效果,并成功将厚度为3 mm的圆板轮缘增厚至9.1 mm,其模拟所得轮缘截面和流线分布与实验成形件具有很好的一致性。

A four-step spinning forging process was designed for this kind of disc-shaped parts with non-uniform thickness.The forming process of spinning forging was analyzed by finite element simulation technology,and the effects of the groove size parameters for the spinning wheel(top tilt angleα,bottom fillet radius R and groove depth l)on the forming stability and the flow lines of the rim section were studied.The groove parameters of spinning sheel for each step was optimized sequentially,the best combination of process parameters was obtained and it was verified by process experiment.The results show that the optimized parameter combination can obtain better forming quality,and the thickness for wheel rim of a circular plate is successfully thickened from 3 mm to 9.1 mm.The rim section and flow lines distribution obtained by simulation are in good agreement with the formed part by experiments.