中间轴楔横轧成形工艺数值模拟优化及试验

发布时间：2018-03-09 21:47

本文选题：阶梯轴　切入点：中间轴　出处：《锻压技术》2017年01期 　论文类型：期刊论文

【摘要】：楔横轧工艺是一种先进的金属成形工艺,广泛应用于成形汽车变速箱的各种阶梯轴。在成形大尺寸非对称的阶梯轴时,轧制力不平衡会导致轧制过程中轧件在水平方向窜动,台阶尺寸不稳定且出现折叠,严重时无法成形;同时,轧件在切线方向摆动量大,从而造成产品弯曲。为了解决轧件台阶尺寸不稳定及弯曲,选取一种典型的非对称阶梯轴,在断面缩减率未超过75%时,采用两次轧制,选用较为合理的成形角和展宽角,同时对料头进行限制,利用有限元模拟软件Deform模拟分析成形过程,并进行试验。结果表明:采用两次轧制能够有效平衡轧制力,保证轧件尺寸稳定;90°直角形状料头比螺旋状料头更能有效限制轧件切向摆动,防止轧件弯曲。
[Abstract]:Cross wedge rolling is an advanced metal forming process, which is widely used in forming various ladder shafts of automobile gearboxes. When forming large size asymmetric step shafts, the uneven rolling force will lead to horizontal movement of the workpiece in the rolling process. The step size is unstable and folded, which can not be formed when it is serious. At the same time, the rolling piece wobbles in the tangent direction, which results in the bending of the product. In order to solve the instability and bending of the step dimension of the workpiece, a typical asymmetric step shaft is selected. When the section reduction rate is not more than 75%, the forming process is simulated and analyzed by means of the finite element simulation software Deform, and the reasonable forming angle and the widening angle are selected for the second rolling process, and at the same time, the material head is restricted, and the finite element simulation software Deform is used to simulate the forming process. The experimental results show that the rolling force can be effectively balanced by twice rolling, which ensures that the material head with 90 掳right angle shape can effectively limit the tangential wobble of the rolling piece and prevent the bending of the rolling piece.
【作者单位】：北京机电研究所;
【基金】：福建省科技计划项目(2014H4025)
【分类号】：TG335.19

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