Problems to be noticed in mechanical polishing

Should pay attention to problems in mechanical polishing with sandpaper polishing, should pay attention to the following points:

(1) need to use sandpaper polishing stick or soft bamboo stick. When polishing round or spherical surface, the use of cork rod can better fit the circular surface and the surface of the sphere. Hard wood like cherry, polishing is more suitable for smooth surface. Trimming of the wood at the end of the surface shape of steel parts and kept consistent. Only in this way can avoid the wood or bamboo strips) acute angle of contact on the surface of steel caused by deep scratches.

(2) when used for different types of sand paper, the polishing direction should transform 45 ~ 90 degrees, so the former models of sandpaper polishing after leave the shadow stripe can be resolution. Before the change of different types of sand must be 100% pure cotton picks up like alcohol cleaning fluid to the polished surface was carefully wipe, because that will destroy the next a small gravel left on the surface polishing work as a whole. From the sandpaper polished into diamond grinding paste polishing, the cleaning process is equally important. All particles and kerosene must be thoroughly cleaned before the polishing is carried out.

(3) in order to avoid scratches and burn the surface of the workpiece, must be careful in using #1200 and #1500 sandpaper polishing. So it is necessary to load a light load and use the two step polishing method to polish the surface. For each type of sandpaper polishing should be in two different directions of two polishing, two direction between each rotation of 45 degrees ~ 90 degrees.