The formulation of the mechanical parts processing procedures can be roughly divided into two steps. The first is to develop parts machining process route, and then determine the size of each process step, with the equipment and technology and equipment, as well as cutting specification, fixed working hours. The two steps are interrelated, should conduct a comprehensive analysis. The elaboration of the process route is to develop the overall layout of the process, the main task is to select the processing method of the respective surfaces, and determining the processing order of the respective surfaces, as well as the number of the step in the entire process. The general principles intended process routes are mainly the following:


1, divided into the stages of processing, processing of high surface quality requirements, are divided into the stages of processing, generally can be divided into roughing, semi-finishing and finishing three stages. In order to ensure processing quality; conducive to the rational use of the device; facilitate the arrangement of the heat treatment process; easy found rough defects.

2, first surface after hole, box, bracket and connecting rod parts should be processed plane after processing hole. This planar positioning machining hole, to ensure the accuracy of the plane and the position of the hole, but also for the processing of the hole on the plane to bring convenient.

3, the first machining plane, the parts in the process, as a positioning reference surface should first be processed out, so that as soon as the processing of the subsequent step to provide the fine reference. Called "benchmark first.

4, finishing, finishing processed workpiece. Finishing the main surface (such as grinding, honing, fine grinding \ rolling processing, etc.), should be placed on the final stage of the process route, machined surface finish above in Ra0.8um, a minor bump can damage the surface in Japan , Germany and other countries, finishing, should use the flannel to protect the absolute ban on the hands or other objects in direct contact with the workpiece to prevent surface finishing processing, transport and installation process between damage.