Talking about the proofreading of bearing self-aligning performance

The ability of the rolling bearing to automatically compensate for the relative deflection of the bearing and the centerline of the housing, thereby ensuring the normal working condition of the bearing, is called the aligning of the rolling bearing.

Due to the machining and installation errors of the bearing housing bore and the shaft, as well as the flexural deformation of the shaft after loading, the shaft and the inner and outer ring axes are unlikely to remain coincident during operation, which may cause a certain deflection. Axis deflection will cause an uneven distribution of the internal contact stress of the bearing. Causes early failure of the bearing. Therefore, in general design, the assembly design requirements should be improved as much as possible. For the case where the deformation of the winding is large, the bearing with good centering performance should be selected.

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Bearing crack treatment method

1. A metamorphic layer formed by grinding force. During the grinding process, the surface layer of the workpiece will be subjected to the cutting force, compressive force and friction of the grinding wheel. In particular, the latter two functions to form a plastic deformation layer and a work hardened layer having a strong directivity on the surface layer of the workpiece. These metamorphic layers necessarily affect the change in the residual stress of the surface layer.

2. The secondary quenching burn will cause the surface layer stress of the nsk bearing workpiece to change. The secondary quenching zone is under pressure, and the material in the high temperature tempering zone below it has the largest tensile stress, which is the place where the crack core is most likely to occur. Cracks are most likely to propagate along the original austenite grain boundaries. Severe burns can cause cracks in the entire grinding surface (more cracking) and scrap the workpiece.

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