General requirements for hardware CNC machining

　　1. Remove the oxide scale of the parts;

　　2, remove burr and flash;

　　3. The surface of the machined parts should not have scratches, scratches, or damage to the functions of the parts and defects on the surface of the parts;

Machining cutting parts requirements

　　 1. Parts should be inspected and accepted in accordance with the procedure, and can be transferred to the next processing procedure only after the previous procedure has passed the inspection;

　　2. The surface of the parts after the process heat treatment should not have oxide scale, and the mating surface and tooth surface after finishing should not be annealed;

　　3, the processed parts are not allowed to have burrs;

4. The surface processed by rolling shall not peel off after rolling;

5. The finished parts are not allowed to be placed directly on the ground when they are placed. Necessary support and protection measures should be taken. The machined surface is not allowed to have defects such as rust, bumps and scratches that affect performance, service life and appearance. ；

　　6. The surface of the processed thread is not allowed to have defects such as black skin, bumps, random buttons and burrs; precision stamping parts, new energy stamping parts, metal stamping dies