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Methods to improve the actual matching accuracy of bearings

wallpapers Industry 2020-12-09
In order to improve the actual matching accuracy when the bearing is installed, it is necessary to use measuring methods and measuring tools that do not deform the bearing to accurately measure the size of the matching surface of the inner hole and outer circle of the bearing. The measurement of the inner diameter and outer diameter can be All the items are measured, and comprehensive analysis of the measured data is made. Based on this, the dimensions of the bearing installation parts of the shaft and the seat hole are precisely matched. The actual measurement of the corresponding size and geometry of the shaft and the seat hole should be carried out under the same temperature conditions as when measuring the bearing.
  
In order to ensure a high actual matching effect, the roughness of the matching surface of the shaft and the seat hole and the bearing should be as small as possible.
  
When making the above measurement, two sets of marks showing the direction of maximum deviation should be made on the outer circle and inner hole of the bearing, and on the corresponding surface of the shaft and the seat hole, on both sides close to the assembly chamfer. In the actual assembly, the maximum deviation of the two matching parties should be aligned in the same direction, so that the deviation of the two parties can be partially offset after assembly.
  
The purpose of making two sets of orientation marks is that the compensation of deviation can be considered comprehensively, not only to improve the rotation accuracy of each support at both ends but also to obtain part of the coaxiality error of the seat hole between the two supports and the journal at both ends eliminate. The implementation of surface strengthening measures on the mating surface, such as sandblasting, using a precision plunger with a slightly larger diameter to plug the primary inner hole, etc., will help improve the accuracy of the mating.

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