楔横轧梯形螺旋齿轴金属流动规律

分析金属流动规律,是研究楔横轧螺旋齿成形规律的重要方法。采用DEFORM-3D有限元软件模拟梯形螺旋齿的成形过程,对不同截面上的分析点成形过程进行追踪,获得成形过程轧件径向、轴向金属流动规律。受模具齿形顶部及侧壁挤压作用,在不同位置,轧件上各螺旋齿底部径向金属变化基本相同,轧件齿顶径向流动差别稍大;大部分轴向金属流动量与初始点距轧件中心距离成正比,处于轧件侧壁处金属流动情况略有差别;轧件齿形两端部金属的轴向流动量较大,径向流动量较小。由实验轧件获得的金属流动规律与模拟结果一致。该金属流动规律对模具孔型设计提供了依据。

Study on metal flow law in cross wedge rolling of trapezoidal helical tooth shaft

Analysis of metal flow law is an important method to study forming law of helical tooth shaft in cross wedge rolling.In this paper,the forming process of trapezoidal helical tooth shaft was simulated using the finite element software DEFORM-3D.The analysis points on different cross-sections were selected and tracked in the forming process to obtain the radial and axial metal flow laws for rolled piece in different positions.Because of the extrusion action of the top and sidewall of die teeth,the amount of radial metal flow of helical alveolar of rolled piece was basically same on the bottom of teeth and varied slightly on the top of teeth in different locations.Most of the axial metal flow amount was proportional to the distance between the initial location and the center of rolled piece.But the flow law in the sidewall was slightly different.The amount of axial metal flow at both ends of the teeth of rolled piece was larger,but the amount of radial metal flow was smaller.The conclusion was verified by the experimental data curve of rolled piece.The metal flow law obtained from rolling experiments was consistent with the simulation results.The metal flow law provided the basis for pass design of die.