Device and method for efficiently polishing and processing high-precision balls in cluster magneto-rheological mode

Abstract

The invention discloses a device and a method for efficiently polishing and processing high-precision balls in a cluster magneto-rheological mode. The device comprises upper and lower polishing discs,and a magnetic field generator. Under action of magnetic fields, viscosity of magneto-rheological fluid which enters V-shaped slots of the polishing discs is increased within extremely short time, and a magnetic chain string clamps abrasive particles to form a flexible polishing pad; ceramic balls are coated by the flexible polishing pad in the V-shaped slots; and along with motion (auto-rotationduring revolution) of the polishing discs, the surfaces of the ceramic balls are polished by the abrasive particles in the magneto-rheological flexible polishing pad. The device does not need to adopt a circulating device for regenerating the magneto-rheological fluid, so that the whole process from rough polishing to fine polishing of the ball bodies can be realized through once clamping; and anobtained workpeice is good in surface consistency, is stable in shape precision, is high in processing efficiency, and is free of surface and sub-surface damages; and moreover, the device is low in cost, and is suitable for high-efficiency ultra-smooth uniform grinding and polishing of high-precision ceramic balls in ceramic ball bearings.

Description

technical field [0001] The present invention relates to a spherical part polishing device and polishing method, in particular to a high-speed, high-precision ceramic ball bearing cluster magnetorheological high-efficiency polishing device and method for processing high-precision balls. The magneto-rheological effect further improves the surface quality of ceramic balls, and belongs to the technical field of ultra-precision processing. Background technique [0002] According to the current increase in the spindle speed, the requirements for the bearing are also greatly improved. Hot isostatic pressed silicon nitride (HIPSN) is considered to be the material of choice for manufacturing high-speed, high-temperature precision bearing balls such as aircraft engines, high-speed spindles and precision machine tools. Compared with traditional steel balls, it has the characteristics of lower density, higher hardness, larger elastic modulus (better rigidity), smaller thermal expansion...

AI Technical Summary

Problems solved by technology

However, this method uses many power sources for processing devices, complex structures and control systems, high requirements for manufacturing and assembly precision, and high processing costs.

In addition, there is also a ceramic ball magnetic levitation grinding method, which is mainly characterized by the use of magnetic fluid technology to achieve high-efficiency grinding of the ball blank. In addition to the different pressurization methods for the ball blank, the grinding movement method is the same as the traditional V-shaped groove grinding process and The movement mode in the conical disc grinding process is basically the same, so the sphericity is also limited in the processing process, and the processing device and control system used in the magnetic levitation grinding process are complicated, and the cost of the magnetic fluid is also high. limitations

In view of the low efficiency, poor processing consistency and high cost of ceramic ball polishing at home and abroad, it is urgent to develop a high-efficiency, high-consistency, low-cost grinding / polishing method for batch processing ceramic balls

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