What is the machining order?
The principle of mechanical processing order arrangement is: first base surface, coarse fine apart, first coarse fine, first surface after the hole.
1. The principle of base surface priority
When machining parts, need to choose a suitable surface as positioning base surface, in order to correctly install the workpiece, only the blank surface (not processed surface) used as positioning base surface, in the following the processing process, in order to improve the processing quality, the processing surface as positioning benchmark as possible, obviously, in arranging mechanical processing, first processing base surface, such as shaft parts processing, mainly on the center hole as the benchmark, therefore, in the processing process, should arrange the end surface of the vehicle, drilling center hole technology.
2. The principle of separation of thickness, first coarse and then fine
When the processing quality of parts is high, the surface with high accuracy should be divided into processing stage, which can be divided into three stages: rough processing, semi-finishing and finishing, finishing is a stage, which is conducive to ensuring the processing quality and the arrangement of some heat treatment processes.
To sum up, the general processing order is: first, process the main surface of the reference rough machining (the surface with high accuracy requirements), and the secondary surface treatment should be between the stages.
