小断面收缩率轴类零件楔横轧成形的可行性分析

Feasibility study on forming light area reduction shafts by cross wedge rolling

利用ANSYS/LS-DYNA软件,对楔横轧小断面收缩率轴类零件的成形过程进行了有限元数值模拟,通过与常规断面收缩率轧件对比,分析了小断面收缩率轧件的表面和心部质量情况.结果表明:相同工艺参数条件下,小断面收缩率轧件横截面的椭圆度大于常规断面收缩率轧件;由于小断面收缩率轧件中心点处的平均应力和最大主应力均较大,因而更容易发生心部缺陷.提出了改善轧件表面和心部质量的措施.经轧制实验验证,楔横轧成形小断面收缩率轴类零件是可行的.

The forming process of light area reduction shafts by cross wedge rolling was simulated with the analysis software ANSYS/LS-DYNA.Surface and central qualities of light area reduction rolled pieces were analyzed in comparison with those of conventional area reduction rolled pieces.It is found that the ovality of the light area reduction rolled piece exceeds that of the conventional area reduction rolled piece under the same process parameter condition.Compared with the conventional area reduction rolled piece,the light area reduction rolled piece is more prone to central defects due to its both larger mean stress and maximum principal stress at the central point.Some measures to improve surface and central qualities of the rolled piece were proposed.Rolling experiments were carried out and the results demonstrate that forming light area reduction shafts by cross wedge rolling is feasible.