The factors that Influence the qualified rate of alnico magnets steel

　　The low qualified rate of Alnico Magnets steel is due to the poor size tolerance and geometric tolerance. And the main factors that Influence the size tolerance and geometric tolerance is the datum selection and installation of work piece positioning. The main factors that influence crack and spalling are the cooling fluid and cutting depth.

　　The first is the datum. The size accuracy and surface roughness of datum are the foundation of other machining accuracy and surface roughness. If datum precision and surface roughness is better, the other processing precision and surface roughness will be good, too.

　　The second is the workpiece installation and correction. Properly installing the workpiece has a direct impact on the processing quality and safety production .

　　The third is the cutting depth and cooling fluid. It is well known that the volume will produce a large amount of heat in the aluminum nickel and cobalt alloy board cut process. The temperature of grinding wheel and surface contact layer can reach to 1600 ℃. At this time, the heating speed of the alnico magnets steel metal surface will up to 10000 ℃ / SEC.