Processing method of end face asymmetric width positioning slot extra thin wall bearing ring chamfer

Abstract

The invention discloses a processing method for chamfering an ultra-thin-walled bearing ring whose end face is an asymmetric wide positioning groove. The surface of the bearing ring is roughly machined, and an asymmetric wide positioning groove is processed by a milling machine. After heat treatment, the bearing is placed in a constant temperature box. The ferrule is heated to 120 ℃ ~ 140 ℃ for dimensional stabilization treatment. According to the design requirements of the chamfer of the bearing ring, the required chamfer R size is calculated, and the chamfer R sample for measurement and inspection is processed and the cutter head with chamfer is ground. R's carbide turning tool, on the CNC lathe, use special soft claws that have not been quenched for the inner diameter of the bearing ring of the light truck. The bearing ring rotates at a low speed of 50-60r / min, and the tool holder uses a small feed rate of 0.001-0.003mm. The chamfer R is processed by turning once. After turning, the chamfer R sample is used for measurement and inspection, and the special right-angle chamfer ruler is used for measurement. This method will not "gnaw" and damage the turning tool, has high production efficiency, ensures consistent chamfer R size, smooth transition, and meets the processing technology requirements.

Description

technical field [0001] The invention belongs to the technical field of bearing ring processing, and in particular relates to a processing method for chamfering an ultra-thin-walled bearing ring with an asymmetric wide positioning groove on the end face. Background technique [0002] The international standard stipulates that the assembly chamfer of the bearing is a fillet transition, and the finished bearing needs to ensure that the assembly chamfer r 1min and r 2min coordinate size. General bearings, especially ultra-thin-walled bearing rings, have no positioning grooves on the end face. The assembly chamfers are usually machined and formed before heat treatment. Assembly chamfers are no longer machined. For the assembly chamfers of high-precision bearings and bearings with special requirements for assembly chamfers, the assembly chamfers are processed by grinding, which has low processing efficiency and is not suitable for mass production. [0003] For ultra-thin-walle...

AI Technical Summary

Problems solved by technology

For the assembly chamfers of high-precision bearings and bearings with special requirements for assembly chamfers, the assembly chamfers are processed by grinding, which has low processing efficiency and is not suitable for mass production.

[0003] For ultra-thin-walled bearings, when the assembly chamfer of the bearing ring is machined and formed before heat treatment, due to the extremely thin wall thickness of the bearing ring, after heat treatment, the bearing ring will inevitably undergo large deformation and bending, causing the bearing The assembly chamfer of the ferrule is irregular and cannot meet the design requirements

If the end face of the bearing ring has an asymmetrical wide positioning groove, such as figure 1 As shown, there are three asymmetrically wide positioning grooves on the end face of the bearing ring, the deformation of the bearing ring is more irregular, and the assembly chamfer cannot be guaranteed after the bearing ring is processed into a finished product. 1min and r 2min Coordinate size, even a lot of waste products due to unqualified assembly chamfer of bearing ring

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