Research on CVD rotary dresser precision grinding technology based on error grading and real-time grinding wheel profile

Abstract

Abstract Dressing wheels with CVD rotary dressers are widely used in the grinding process. To meet the accuracy requirements of dressing grinding wheels, the profile accuracy of CVD rotary dressers must be processed to the micron level. However, CVD diamond is a hard and brittle material, making it difficult to machine to a high degree of shape and dimensional accuracy. A graded grinding method is proposed in this paper to achieve precision machining of the CVD rotary dresser. The normal residual error is calculated by measuring the difference between the actual grinding profile and the target profile along the normal direction first, and then graded compensation processing is carried out based on the magnitude of the normal residual error. In the grinding process, it is proposed that the grinding path be planned according to the real-time profile of the grinding wheel. Experiments on a CVD rotary dresser for the NILES ZP 12 gear grinder showed that the profile accuracy (Peak to Valley, PV) of the CVD rotary dresser was improved from 14.79$\upmu$m to 1.57$\upmu$m after grinding. The fluctuation of the arc radii of CVD diamonds in different phases along the circumferential direction was reduced from 0.0117mm to 0.0019mm.