Electrolytic in-process dressing device of concave spherical surface of spherical coupling

Abstract

The invention provides an electrolytic in-process dressing device of a concave spherical surface of a spherical coupling, comprising a workpiece spindle, a grinding wheel, an electric spindle, a dressing electrode, a gap regulation device and a brushgear. A ball bowl workpiece is fixed on the workpiece spindle and is driven by the workpiece spindle to rotate at a low speed; the grinding wheel is fixed on the electric spindle and is driven by the electric spindle to rotate at a high speed; the rotation axes of the workpiece spindle and the electric spindle are in the same plane and lead rotating movement tracks of the ball bowl workpiece and the grinding wheel are enveloped to a spherical surface; the gap regulation device can regulate axial gaps and radial gaps between the dressing electrode and the grinding wheel; the dressing electrode is provided with a pipe joint; grinding liquid is sprayed on the grinding wheel through the pipe joint and small holes formed inside the dressing electrode; and the brushgear is fixed on a gap regulation piece and supplies electricity for the grinding wheel. The device of the invention has simple structure and convenient use, and solves the difficult problem that the grinding wheel is difficult to be dressed when the electrolytic in-process dressing is carried out on the concave spherical surface of the spherical coupling.

Description

technical field [0001] The invention relates to an online electrolysis trimming device. Background technique [0002] On-line electrolytic dressing (ELID) is aimed at the characteristics of difficult dressing of metal bond diamond and CBN grinding wheels. The grinding wheel and the dressing electrode are respectively added with positive and negative electrodes, and special grinding fluid is sprayed between them, and the non-linear electrolytic dressing is used for continuous dressing. Grinding wheel for constant edge height and good chip clearance. At the same time, as the electrolysis process progresses, a layer of passivation film is gradually formed on the surface of the grinding wheel to prevent the electrolysis process from continuing, so that the wear of the grinding wheel will not be too fast. The abrasive debris is scraped away, and the electrolysis process can continue, dressing the grinding wheel surface. The above process is carried out cyclically, which not onl...

AI Technical Summary

Problems solved by technology

[0003] Since the grinding of the spherical couple is closed grinding, during the grinding process, all or most of the grinding part of the entire grinding wheel is inside the ball bowl. During grinding, the working part of the grinding wheel is the intersection of the end surface of the grinding wheel and the outer circle. The shape of the corresponding dressing electrode is relatively complicated, and the gap between the dressing electrode and the grinding wheel needs to be adjusted in two dimensions along the radial and axial directions, which brings great difficulties to the dressing of the grinding wheel and the spraying of grinding fluid. , so the current ELID technology has not been applied to the processing of spherical couples

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