关键词: 差速器壳；数控车床；磨床；同轴度；工艺改进

Abstract: With the rapid development of economy and manufacturing technologies, modern CNC machining has become the basic technology for manufacturing industry to realize automation, flexibility and integrated production. In this paper, the machining scheme of the installation outer circle of the differential housing bearing was changed from traditional grinding to CNC turning. Through the selection and optimization of the process influencing factors such as the clamping and positioning accuracy of the CNC machining tool, the cutting performance of the tool, process and cutting parameters, the machining was carried out automatically with the digital program to eliminate the man-made errors of the operator. The processing shape and dimensional accuracy of the product were improved, and the quality was more stable and reliable. Meanwhile, after the grinding process was combined with the turning process, the resource utilization was improved and the product manufacturing cycle was shortened. Due to the shortening of the process chain and the reduction of the number of equipment, the floor area of the workshop, maintenance cost and line personnel allocation were also decreased, which could reduce the production cost and bring high economic benefits.

Key words: Differential shell; CNC lathe; Grinding machine; Coaxiality; Process improvement