Third-generation grinding method for outer flange of automotive hub ball bearing

Abstract

A third-generation grinding method for an outer flange of an automotive hub ball bearing mainly comprises the following steps: 1, processing double channels and a lock mouth surface of the outer flange (1) of the automotive hub ball bearing according to the composite plunge-cut grinding technology of a diamond roller (4) and a form grinding abrasive wheel (2); 2, conducting high-speed form trimming on the form grinding abrasive wheel (2) with the diamond roller (4) of which the outline profile is required to be coincident with the required profile of the outer flange (1), so as to ensure that the profile of the form grinding abrasive wheel (2) is coincident with that of the outer flange (1). An electromagnetic centerless clamp (5) serves as a grind positioning tool of the outer flange (1); the outer flange (1) rotates with the speed of 200 turns per minute to 400 turns per minute; the form grinding abrasive wheel (2) under the driving of an abrasive wheel electric spindle (3) with a built-in motor rotates fast with the linear speed of 60 m / second and grinds in the same direction as the rotation of the outer flange (1). Therefore, the channels and the lock mouth surface of the outer flange (1) can be formed in one step through composite grinding. The grinding method provided by the invention has the advantages that the machining precisions are consistent, reliable and guaranteed; and the quality of an automotive hub ball bearing component is improved.

Description

technical field [0001] The invention belongs to the technical field of processing outer flanges of automobile hub bearings, and mainly relates to a third-generation grinding method for outer flanges of automobile hub ball bearings. Background technique [0002] Automobile wheel bearings are important rolling bearings for automobiles. They are installed in automobile hubs, and their main functions are to bear weight and provide precise guidance for the rotation of the hubs. It bears both axial load and radial load, and is a very important component. Automobile hub bearings have experienced the first generation of double row angular contact ball bearings, the second generation of double row angular contact ball bearing assemblies with flanges on the outer ring, and developed to the current third generation of double row with flanges on both the inner and outer rings. Angular contact ball bearing assemblies. Due to the significant improvement in the performance of hub bearing...

AI Technical Summary

Problems solved by technology

Using this processing method of separate grinding in a dispersed process to process the outer flange parts of the third-generation automobile wheel hub bearings not only needs to add more equipment and a number of operators, but also it is difficult to ensure the groove on the outer flange parts to be ground. The consistency of precision between the tracks and lock surfaces, low processing efficiency and low pass rate make the product quality of the third-generation automotive hub ball bearings unable to be effectively controlled, which affects the reliability and safety of the vehicle

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