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在分析花键冷敲成形原理的基础上,采用ABAQUS/Explicit算法对花键冷敲相邻齿槽成形过程进行了有限元模拟仿真,研究了工件经过不同敲打次数后两个相邻齿槽的应力、应变分布规律。在自行研制的LQ200型冷敲设备上加工花键轴,利用光学显微镜研究冷敲花键不同成形区的显微组织形貌,以及不同成形区的影响层深度。结果表明:冷敲成形属于局部表层成形,敲打齿槽在敲击时应力波扩散到了相邻齿槽,应力波对相邻齿槽齿顶、齿侧、齿根的影响依次减小,敲打齿槽在敲击时对相邻齿槽的应变影响很小;齿顶成形区分度圆以上均为影响区,相比齿侧、齿根成形区,齿顶影响区范围最大;齿侧成形区的影响区深度大约为1 mm;齿根成形区的影响区深度大约为600μm。
Based on the analysis of the forming principle of cold tapping, the ABAQUS / Explicit algorithm was used to simulate the forming process of the adjacent taper with cold tapping. Finite element simulation was carried out on the forming process of two adjacent alveolus after different tapping times Stress and strain distribution. The spline shaft was machined on the LQ200 cold knocking equipment developed by ourselves. The microstructure of different forming zones of the cold tapping spline and the depth of influence layer of different forming zones were studied by optical microscope. The results show that the cold tapping is localized on the surface and the stress wave propagates to the adjacent alveolus when striking the tooth groove. The influence of stress wave on the tooth top, The groove had little effect on the strain of the adjacent gullets when tapping; the above of the top of the addendum formation was the influence area, and the area of influence of the tooth top was the largest compared with that of the flank, The depth of influence zone is about 1 mm; the depth of influence zone of dedendum forming zone is about 600 μm.