We all know that there are usually three processes for polishing steel shots: coarse grinding, medium grinding and fine grinding. Each transfer process needs to use finer abrasives, and appropriately reduce the rotation speed of the grinding wheel, so as to obtain a finer grinding effect than the previous process.
Generally, the specific steel shot
polishing steps depend on the surface roughness of the workpiece itself. Except for the severe scratch marks on the aluminum material, the machined parts can be polished with l60#, and then the steel shot can be polished. If necessary, 120# rough grinding can be added before that, and then oiled and polished. It is not suitable or recommended to use fine sand abrasives for one-time grinding, otherwise it will not only reduce the work efficiency, but also affect the service life of the polishing wheel.
In order to improve the polishing quality of the steel shot, the rough machining marks left over from the mechanical processing must be worn out during the rough grinding, and the marks left over during the rough grinding must be ground out during the medium grinding, so that the surface finish of the workpiece is gradually improved. Improve and improve, otherwise it will not only take a lot of labor and materials, but also the quality will not be guaranteed.
In addition, in order to avoid the repetition of steel shot polishing track marks and improve the steel shot polishing quality and polishing efficiency, the direction of the grinding wheel must cross the previous grinding track in each polishing pass.
By polishing the steel shot, various macroscopic defects such as burrs, rust, scratches, weld bumps, weld seams, trachoma, and oxide skin on the surface can be removed, so as to improve the flatness and electroplating quality of the steel shot.