Prevent KOYO bearing preload overheat and preloading

Main impregnation: improve KOYO bearing stiffness, eliminate running noise, compensation for the increase in the operation of the wear of clearance, improve the guidance precision of the shaft, the using life of bearing for this delay. KOYO bearing internal clearance before installation ( The original clearance) And after installation to reach operating temperature bearing internal clearance ( Said things clearance) Difference, the former is big, with differences in application places, many negative running clearance requirements, namely the applied load, the preload is supposed to guarantee the bearing in the common used against damage due to sliding load conditions. Preloading is often the main indexes ( Dynamic load rating Cr) Best preloading load coefficient, still need to dispute preloading, after confirmed by experiments on grade to determine the value of money, through the difference of essentials. ( 1) Strictly control the lcrl8Ni9] Ri stainless steel casing, flange forging heating temperature and heating time of heat preservation, prevent work-piece overheating make coarse grains. ( 2) Artifacts in forging production, such as forging ratio is too small, the final forging temperature on the high side, also easy to appear coarse grain structure defects, should make the workpiece forging ratio appropriate, sufficient, finish forging temperature is moderate. ( 3) KOYO bearing the workpiece heat treatment solid solution treatment temperature is unfavorable and exorbitant, heat preservation time shoulds not be too long, the heating temperature should be no higher than 1150 C, the heat preservation time to 1 a l5min/mm calculation is advisable. ( 4) Bulky artifacts, to prevent excessive tissue can be used to forge refine grain method to eliminate defects, to prevent the occurrence of orange peel during cold deformation of workpiece surface defects, improve the surface quality of workpiece.