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采用Forge2011软件数值模拟了25Cr Mo4钢汽车全空心半轴的精密旋锻工艺。首先,对汽车空心半轴精密旋锻成形第一工序典型段中的锤头载荷、等效应变场、应力场等各工艺参数进行了研究。然后,根据数值模拟结果确定了正交试验因素和水平,得到了较优参数组:单次坯料转角12°,锤头径向进给量0.5 mm,进锤速度7.5 mm/s。最后,基于正交试验的优化结果对全空心半轴旋锻加工进行数值模拟和产品试制,验证了优化工艺参数的可靠性。
The precision swaging technology of 25Cr Mo4 steel semi-hollow axle is simulated by Forge2011 software. First of all, the process parameters of hammerhead load, equivalent strain field and stress field in the typical first stage of the hollow half-shaft precision swaging of a car are studied. Then, according to the results of numerical simulation, the factors and levels of orthogonal experiment were determined. The optimal parameters were obtained: single billet rotation angle of 12 °, hammer radial feed rate of 0.5 mm and hammer speed of 7.5 mm / s. Finally, based on the optimization results of orthogonal test, the numerical simulation and product trial of full hollow half-shaft swaging are carried out, and the reliability of the optimized process parameters is verified.