Hemispherical dynamic pressure bearing part grinding tool and grinding method

Abstract

The invention provides a hemispherical dynamic pressure bearing part grinding tool and grinding method. The grinding tool comprises a transmission base, a tool main shaft and a positioning block; pins are evenly distributed on the periphery of the transmission base, and socket head cap screws are arranged on the outer sides of the pins; the bottom end of the tool main shaft is arranged in the center of the transmission base, and a positioning block is arranged at the top end of the tool main shaft; and a horn opening used for containing steel balls is arranged on the positioning block. The grinding method includes the steps that (1) the accuracy of the gyration center of a main shaft of a grinding machine is adjusted; (2) the coincident accuracy of a swing shaft of the grinding machine and the perpendicular main shaft axis is adjusted; (3) the height of the sphere centre of the main shaft of the grinding machine is adjusted; and (4) grinding is carried out. By means of the hemispherical dynamic pressure bearing part grinding tool and grinding method, the technical problems in hemispherical part premise grinding are solved; compared with traditional manual grinding and polishing, the high machining efficiency is achieved; and meanwhile, in the premise grinding process, the machining state is stable, the high machining quality can be achieved, the machining accuracy can reach 0.02 micrometer, and the requirement for a working gap of a dynamic pressure bearing is met.

Description

technical field [0001] The invention belongs to the application field of spherical surface precision grinding, and is used for ultra-precision machining of high-precision, high-hardness, and highly difficult-to-machine hemispherical dynamic pressure bearing parts, and relates to a hemispherical dynamic pressure bearing part grinding tool and a grinding method. Background technique [0002] The hemispherical dynamic pressure bearing adopts the opposed hemispherical structure, which is the core component of the gyro motor. The spherical surface of the hemisphere is sprayed with titanium nitride film + diamond-like film, and the spherical surface of the concave hemisphere is sprayed with titanium nitride film; in order to ensure that the hemispherical dynamic pressure bearing has good dynamic pressure effect and carrying capacity, the working clearance and dimensional accuracy of the dynamic pressure bearing The roundness of the hemispherical parts in different directions is no...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a hemispherical dynamic pressure bearing part grinding tool and grinding method, which solves the technical problem of precision grinding of hemispherical dynamic pressure bearing parts, ensures that the roundness of hemispherical parts in different directions is not greater than 0.3 microns, and the dynamic pressure bearing The working gap and dimensional accuracy meet the requirements of micron level

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