A Clamping Device for Generating Grinding of Few Hemispheres

Abstract

The invention discloses a clamping device for generating grinding of a minor hemisphere. The clamping device comprises a central spindle, a hexagon nut, a spring washer, positioning pressure plates and a sphere center compensation plate. The sphere center compensation plate is mounted on a sphere center compensation plate mounting surface of the central spindle and is in transition fit with the central spindle. The two positioning pressure plates are mounted on bosses at the two ends of the central spindle respectively and are positioned in the radial direction through the bosses respectively. The two end faces of the sphere center compensation plate serve as positioning surfaces of a workpiece. The sphere center compensation plate, the two positioning pressure plates and the workpiece are all coaxial with the central spindle. According to the clamping device which serves as a grinding device, when the surface hardness of the minor hemisphere is greater than or equal to HRC55, the roundness less than or equal to 0.02mm and the surface roughness less than or equal to Ra 0.8 micron, an etalon can be used in the generating grinding process for directly measuring the grinding sphere diameter and the position of the sphere center, so that the shape error of the minor hemisphere is determined, and on-line error adjustment is realized. The clamping device has the advantages of being high in production efficiency and product compactness.

Description

technical field [0001] The invention relates to the field of generative grinding, in particular to a clamping device for generative grinding of spheres with few hemispheres. Background technique [0002] The less-hemispherical spheres used in the aerospace engine industry can usually only be ground one piece at a time when ordinary cylindrical grinders or surface grinders are used for generating grinding. Due to the structure of the less-hemispherical spherical crown, the diameter of the spherical crown is smaller than the maximum diameter of the sphere, so the spherical center of the spherical crown is a space point outside the entity. During the grinding process after clamping, conventional methods and conventional measuring tools cannot be directly measured to obtain accurate results. Ball diameter value, it is difficult to control the position of the center of the ball and the error of the spherical shape, and the production efficiency is low. [0003] Searching for pat...

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Problems solved by technology

[0005] In order to overcome the problems existing in the prior art that the accurate ball diameter value cannot be directly measured, it is difficult to control the position of the center of the ball, the error of the spherical surface shape, and the production efficiency is low, the present invention proposes a grinding device for the generation of less hemispherical spheres. clamping device

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