Grinding plane, generally with a plane as the positioning datum, grinding another plane, if the two planes are required to grinding, can be the basis of repeated grinding. According to the need to adjust the feed speed, grinding can be stopped, to check the size of the more accurate.There are two kinds of plane grinding method, an end grinding method, grinding wheel surface, because of its large contact surface, easy to heat, and the cooling liquid to pour into the workpiece heat deformation, thus grinding accuracy is low, but higher productivity. Another grinding method. On the contrary, the grinding efficiency is low, but the machining precision is high. Sometimes the magnechuck bonded magnets, the advantages outweigh the disadvantages, the There are both advantages and disadvantages., what are the advantages of this approach?1 the degree of freedom of the shape is easy to be made into a magnet with a complex shape or a thin wall ring and a thin sheet magnet. Injection molding can also be embedded with other parts forming.27%. The high precision of the electromagnetic chuck, the shrinkage rate of the sintered magnet is 13% ~ ~ ~ (2), and the shrinkage rate of the bonded magnet is only about 0.2% ~ 0.5%. High precision magnets can be made without two machining.