In-gas discharge dressing and truing method for large-particle diamond grinding wheel

Abstract

The invention discloses an in-gas discharge dressing and truing method for a large-particle diamond grinding wheel. The method includes: fixing the diamond grinding wheel on a grinding wheel shaft, and fixing a conducting electrode on the horizontal plane; connecting the diamond grinding wheel, the electrode, a graphite brush, a power source and a wire to form a discharge circuit; connecting a positive pole of the power source to the grinding wheel, and connecting a negative pole of the power source to the electrode. When rotating, the diamond grinding wheel linearly reciprocates on the surface of the electrode; metal bond is removed by pulse sparks generated between the electrode and the metal bond of the grinding wheel, so that diamond abrasive particles are edged from the surface of the grinding wheel; spark discharge occurs between the metal bond and whirling conducting chips generated when the edged diamond abrasive particles cut the copper electrode, generated instant high temperature is transmitted to cutting edges of the diamond abrasive particles in contact cutting through the chips, the tips of the cutting edges are pneumatically dressed, and accordingly micro edging, dressing and truing of the grinding wheel are achieved, more effective abrasive particles are generated and efficient grinding of smooth mirrors is achieved.

Description

technical field [0001] The invention relates to the field of micro-sharpening and precision machining of superhard diamond grinding wheels, in particular to a method for sharpening and aligning large-grain diamond grinding wheels by electric discharge in air. Background technique [0002] High-performance hard and brittle materials such as optical devices, glass, and engineering ceramics are widely used. They have high hardness and low fracture toughness, which are difficult to process and difficult to obtain high-quality surfaces. Traditional dressing methods such as abrasive grinding method, diamond pen dressing method and grinding mild steel method not only have low dressing efficiency, but also have problems such as difficult control of shaping accuracy and complicated operation. In recent years, many new trimming technologies have emerged, such as laser trimming, electrochemical corrosion trimming, and online electrolytic trimming. Although the trimming accuracy has bee...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of low mechanical dressing efficiency in the prior art, and to provide a method for sharpening and trimming the micro-exit edges of large-grain diamond grinding wheels that are discharged in air, which can be used to repair hard surfaces such as optical glass, ceramics, and hard alloys. Precise mirror grinding of brittle materials

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