I believe that we all know that when we do anything, we have certain principles, that is, we don't know whether we have paid attention to observation. In our daily life, do you know the principle of machining mechanical parts?
Its processing principles are as follows:
1. First process the datum plane. In the process of machining, the surface used as the positioning reference should be machined first, so as to provide the precision reference for the subsequent processing as soon as possible. It is called "benchmark first".
2. Divide the processing stage. Surfaces with high machining quality requirements are divided into three stages: rough machining, semi finish machining and finish machining. It is mainly to ensure the processing quality, to facilitate the rational use of equipment, to facilitate the arrangement of heat treatment process, and to facilitate the detection of blank defects.
3. Face before hole. For the box, bracket, connecting rod and other parts, the plane shall be machined before the hole is machined. In this way, the hole can be machined by plane positioning, ensuring the position accuracy of plane and hole, and bringing convenience to the machining of hole on plane.
4. Finish machining, finished workpiece.