摘要
在差速器壳生产现场六西格玛质量管理过程中发现,差速器壳轴承外圆直径加工能力不足,通过箱线图和ABAQUS软件分析得出差速器壳夹具结构不合理是导致加工过程能力不足的关键因素,采用ABAQUS软件对差速器壳夹具进行优化并仿真,夹具改进后,差速器壳两端轴承外圆应力应变显著减小,且受力均匀。实际生产SPC质量管理过程中,差速器壳轴承外圆直径加工工艺能力指数Cpk由0.49提升至1.34,产品加工过程能力充足,产品合格率由93.6%提升至100%,改进后的差速器壳夹具有利于提升产品质量。
In the process of the six-sigma quality management of the differential carrier production site,it is found that the machining capacity of the outer diameter of the bearing for the differential carrier is insufficient. Statistical analysis reveals that the insufficient capacity is caused by unsuitable structure of the fixtures. Thus,optimization has been carried out using ABAQUS.The simulation results show that the residual stress applied on the bearing at both ends of the differential carrier are significantly reduced when optimised fixture is installed. Based on such optimization,the capability index Cpk of the machining process for the differential carrier increases from 0. 49 to 1. 34,which makes the processing capacity sufficient. Additionally,the accept ability of the products increases from 93. 6% to 100%,which evidently demonstrates the feasibility of the optimization.
基金
校企合作基金资助项目(611605991)
