A composite high-efficiency and precise dressing method for superabrasive grinding wheels

Abstract

The invention provides an ultrahard abrasive grinding wheel compounded efficient and precise finishing method. The method comprises the following steps: (1) abrasive water jet rough finishing: abrasive water jet is sprayed to a direction with a certain angle; meanwhile, an abrasive water jet nozzle performs a reciprocating motion along a section profile trajectory of a molded surface needed by a grinding wheel; and an ultrahard abrasive grinding wheel is radially fed to realize rough finishing; (2) a finishing roller and a free abrasive are used for extrusion and finishing; abrasive water jetspray heads are arranged in a row; and the jet flow of each spray head is controlled to match with a finishing roller for finishing; and (3) the abrasive water jet is used for finishing sharpness. Theultrahard abrasive grinding wheel compounded efficient and precise finishing method is simple in process, high in finishing precision and suitable for the finishing work of ultrahard abrasive grinding wheels with complex molded surfaces.

Description

technical field [0001] The invention relates to the field of dressing of grinding wheels, in particular to a composite high-efficiency and precise dressing method of superhard abrasive grinding wheels. Background technique [0002] Form grinding technology is the main method to obtain high-quality parts with complex profiles. Therefore, the grinding wheel needs to be trimmed before use to obtain the processing surface of the corresponding profile. [0003] At present, although the metal-bonded grinding wheel prepared by diamond and CBN (cubic boron nitride) superabrasives has excellent characteristics such as high chemical stability, high wear resistance, and long service life, it also brings great difficulty in dressing. The problem. When using traditional dressing methods such as turning dressing method, cup wheel dressing method, and diamond roller dressing method to dress the above-mentioned superabrasive grinding wheel, there are generally problems such as fast wear of...

AI Technical Summary

Problems solved by technology

When using traditional dressing methods such as turning dressing method, cup wheel dressing method, and diamond roller dressing method to dress the above-mentioned superabrasive grinding wheel, there are generally problems such as fast wear of dressing tools, low dressing efficiency, and low dressing accuracy. It is especially obvious when some complex profile grinding wheels with high precision requirements

[0004] In recent years, in response to the above technical problems, some new trimming methods have emerged, such as electrolytic trimming, electric spark trimming, and laser trimming. Among them, although the electrolytic trimming method has high precision, its special electrolyte and special equipment will The entire dressing device is expensive and complicated; although the EDM method can improve the dressing efficiency, it will cause high-temperature carbonization of the abrasive grains, and the surface abrasive grains will wear quickly; the laser trimming method also has the problem of high-temperature carbonization of the abrasive grains during dressing

[0005] In further research, it is found that abrasive jet technology has a good performance in grinding wheel dressing, as the publication number is: CN106392885, and the title of invention is the Chinese patent of "Composite Precision Dressing Device and Dressing Method for Superabrasive Grinding Wheel", but , the process involved in this method is relatively complicated, and the high-pressure abrasive water jet also plays a dressing role on the dressing wheel that plays a finishing role, which is likely to cause changes in the shape of the dressing wheel during the dressing process, which in turn has an adverse effect on the dressing accuracy of the grinding wheel ,Room for improvement

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