KOYO self-aligning ball bearing installation accuracy used method

Rolling bearing precision components, when use need corresponding cautious, not only change the use of high-performance KOYO bearings, if use undeserved, they can not achieve the desired performance test results, so use bearing the following aspects: keep the bearing and the surrounding clean. Smile even invisible dust bearing, can increase the iron, bearing wear, vibration and noise. When using the installation does not allow strong carefully and don't allow the bearing with a hammer, allowed through the rolling pressure, a direct hit. The use of appropriate and accurate installation tools, the use of special tools, avoid the use of fabrics and staple and as far as possible. To prevent corrosion of self-aligning ball bearings, direct selection of bearing with the hand, fully the sweat on his hands, and then coated with high quality mineral oil, and then start, especially in the rainy season and summer to pay attention to rust. Bearing in the host after the installation, a measure called cyclic rotation accuracy. This change approximately duplicated the revolution, on behalf of cyclic rotation accuracy 'cycle', the value of the amplitude changed in quasi cycle, is the cycle rotation accuracy is poor. When the bearing spindle with proper preload, the speed can be gradually increased to nearly work speed, to implement the KOYO bearing 'break-in' effect, can improve the circulation of the spindle rotation accuracy. Existing a self-aligning ball bearing accuracy of precision instruments. When the 6202 / P2 type bearing spindle, however its precision is still can't meet the requirements, the bold shaft neck and on the race to replace the inner ring, and the steel ball precision measurement, to size every three grain of a group, each group of steel ball are separated pick up close to 120 °, due to reduced a heavy processing surface, reduce the heavy blend surface, at the same time improve the axial stiffness of the bearing system, and the three largest grain and minimum three grain of steel ball nearly equidistant distribution, and improves the precision of drive shaft rotation, thus satisfying the requirements of the precision of the instrument. Now introduces the comprehensive check method of bearing installation accuracy, first of all is to KOYO bearing load bearing of the spindle, the installation accuracy of check to go through the following four steps: the first is measuring the size of the shaft and bearing hole, to determine with precision of the bearing. Inner ring and the shaft to interference fit, outer ring and bearing hole clearance fit. Second, fixed end before the installation of the bearings on the shaft, bearing in the kerosene used to clean the clean thoroughly clean, then quantitative grease oil gun will fill in the bearing inner; Heat bearing the heat up 20 ~ 30 ℃, using hydraulic press the self-aligning ball bearing into shaft end; Will set casing pressure on the shaft and with appropriate pressure against bearing face makes its axial positioning; The lace will spring balance volume on the bearing outer ring, use the method of measuring start torque calibration of pre-loaded whether there is a substantial change. Again, the bearing - Shaft assembly into the hole: heating holes make up 20 ~ 30 ℃, with a continuous gentle pressure of bearing - Shaft assembly into a hole; Adjust the front cover, for bearing outer end face as a benchmark, the dial gauge meter resistance on shaft neck surface, will beat measuring the rotation axis, will be located on the shaft, dial gauge meter resistance in the back seat hole surface, the shaft rotation to measure before and after bearing hole of the alignment. Finally, the free end bearing selectively on May offset the position of the deviation, after installed on the bearing support position, offset each other as much as possible of roundness error and axiality deviation. The actual measurement of a bearing installed with precision. At this time must use professional measuring method and measuring tools, the bearing surface of the inner hole and cylindrical coordinate measure precision of the actual size, will all be about inner and outer diameter measuring project measure, and make a comprehensive analysis of measured data. As according to the precision with a shaft with a hole the size of the bearing installation site. In the actual measurement with a shaft and the corresponding size and shape of the hole, should be the same as the measured bearing temperature conditions. In order to guarantee a higher actual cooperate effect, the surface of the shaft and hole and bearing are suitable, the roughness should be small as possible. In the measurement should be on the bearing outer circle and inner hole, as well as the shaft and hole corresponding to the surface, near the sides of the assembly chamfering can respond in Ming direction of maximum deviation of two sets of tags, so that when the actual assembly, make suitable maximum deviation on the same position of the two parties, so after the assembly, the two sides to partially offset the deviation. In comprehensive consideration of deviation compensation, make the rotation of supporting their precision is improved, and between the two bearing hole and trunnion coaxiality error to get part on both ends. The size of the rolling bearing hole and the diameter size is according to the standard of tolerance, bearing inner ring and the shaft, the outer ring and housing with the magazine's sealing hole can only control the hole tolerance and tolerance. KOYO bearing inner ring and the shaft hole system, the use of the base, the bearing outer ring and housing holes and the use of the machine tool spindle system. With the right choice, we must know the self-aligning ball bearing the actual load condition, temperature and other requirements, but in fact it is very difficult. Therefore, in most cases is based on the use of the choice of refining.