Machining of miniature bearing

Processing according to the method to adjust the Angle of grinding wheel, dressing grinding wheel, adjust the benchmark after the position of the grinding wheel and guide plate gap, grinding can be performed. Machining, grinding wheel speed, grinding wheel for right 1060 r/min ( Do not adjust) , the left wheel for complex frequency control of motor speed, generally is 750 ~ 850 r/min. Feeding speed table shows for the feed motor speed, general ~ - 450 7 r/min。 Short workpiece length can be appropriately reduced, instead the workpiece is longer, feeding time can be appropriately raise the feeding speed. Every time a grinding amount in 0. 02 ~ 0. Between 6 mm advisable, large amount of grinding, grinding machine load increases, the ground for a long time will cause the cutting Angle change, affecting the product accuracy. Generally when the fine grinding of small value, fine grinding can be appropriate when the larger 8. Special precautions in the workpiece machining (1) check grinding wheel flatness, dressing grinding wheel (2) cutting fluid wants enough in time. Amount of cutting fluid is insufficient, grinding temperature rise, mild can increase the workpiece surface roughness, build or surface quality decline; Severe will burn surface (3) continuous uniform feeding. Grinding feed when the workpiece must be continuous into one after another, to ensure that every piece of work by the same time of grinding wheel grinding area, so as to ensure good thickness size. (4) the workpiece measurement accuracy. Every after grinding a workpiece measurement, as the basis of the next grinding for the results of measurement. Special attention should be paid to the last line of fine grinding of grinding, the workpiece measurement accuracy is directly related to the final amount of compensation, a bit not careful will cause the workpiece scrapped. (5) the accuracy of the compensation. Double end face grinding compensation every little on dial 0. When rotating the handle 005 mm, the compensation must feel with the hand. Rotating the handle has a resistance, explain compensation effectively; If there is no resistance, explain the handle in empty mobile is its dynamic gap between gear teeth, compensation shall be invalid. So the operation application of heart to feel. 6. Every time when cold grinding machine grinding amount of instability. Grinding machine cold machine, main shaft axial clearance, clearance between the compensation of transmission gear tooth, spindle moving oil cylinder pressure, grinding force is uneven, the flow of grinding wheel and the actual compensation amount, usually more ground. To solve this problem, there are two ways: one is in the morning, when the phone is switched on ap grinding wheel with grinder first coarse grinding, fine grinding mill grinder temperature rise up again after stability; Each time the other is a grinding, the workpiece accurately measure time, grasp every grinding amount and the actual amount of compensation is poor, summarize its regularity, provide empirical basis for compensation, appropriate amount of fixed compensation in a word, double face grinding is a kind of skill, precision machining, in particular, should be cautious, tread carefully. As long as the heart operations, constantly sum up experience, can with ease, good and fast.