楔横轧小断面收缩率轴类件的椭圆度研究

Ovality study of shafts with light area reduction by cross wedge rolling

利用有限元软件对楔横轧成形小断面收缩率轴类件的椭圆度进行数值模拟,通过对数值模拟结果进行正交回归分析,研究工艺参数对小断面收缩率轧件椭圆度的影响规律.结果表明:展宽角和断面收缩率对轧件椭圆度影响显著,展宽角越大或断面收缩率越小,则轧件椭圆度越大;当断面收缩率较小时,成形角对轧件椭圆度几乎没有影响.并解释了各工艺参数对轧件椭圆度影响的原因.通过轧制实验,验证了数值模拟结果的可靠性.

The ovality of shafts with light area reduction by cross wedge rolling was simulated by finite element software. The influence of technological parameters on the ovality of rolled pieces was studied by the orthogonal regression of the numerical results. Results show that the influences of stretching angle and area reduction on the ovality of rolled pieces are significant, and the ovality of rolled pieces increases with the stretching angle increasing or the area reduction decreasing. However, the forming angle has little influence on the ovality of rolled pieces. The reasons for these influences were explained. Finally the reliability of the numerical results was veri-fied by roiling experiments.