Common problems in the production and processing of roller bearings

The production and processing of roller bearings are common problems. In addition to the three-dimensional compressive stress in the small end of the roller bearing and the cylindrical center, most of the general cases are subject to the one-way compressive stress and the two-way tensile stress. , the closer to the big end of the roller bearing, the greater the tensile stress, and the tensile stress will cause the intergranular deformation of the metal material, which will reduce the plastic deformation of the metal material. Therefore, when the blank or abrasive tool specification planning is unscientific, the raw material is poor, and the processing technology is not good, the roller bearing usually causes cracks at the big end rounding. In addition, the friction between the blank and the abrasive tool in the roller bearing, the uneven internal structure of the raw material and the unscientific specification of the abrasive tool will also cause extra stress inside the roller bearing, reduce the plastic deformation of the metal material, and improve the metal The deformation resistance of the material causes internal stress inside the roller bearing. Extraordinary stress will cause the size and appearance of the roller bearing to change and reduce the performance, especially the external friction becomes extraordinarily stress, which is not good for the quality and manufacturing process of the roller bearing, and it is partly caused by the rounding of the small end of the roller bearing. The radial area of ​​the corner reduces the internal and external quality of the rounded corner of the roller bearing, and also increases the damage of the abrasive tool and reduces the service life of the abrasive tool. The link factors that affect the friction are the characteristics of raw materials, the design of the mold, the process performance and the actual effect of lubrication. Cylindrical rollers for bearings come in various designs, series, variants and sizes, and the main design differences are the number of rows of rollers and inner/outer ring flanges, as well as the design and material of the cage. Bearings can cope with large radial loads and high rotational speeds, adapt to axial displacement (except for bearings with flanges on both the inner and outer rings), they have high stiffness, low friction and long service life. Bearing cylindrical rollers are also available in sealed or split designs. In sealed bearings, the rollers are protected from contamination, water and dust, while maintaining lubricant and breaking contamination. This reduces conflicts and extends service life. Split bearings are primarily used in hard-to-reach bearing installations, such as crankshafts, to simplify maintenance and replacement.

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