Electroplated grinding wheel Large abrasive diamond grinding wheel takes diamond abrasive as raw material, respectively uses metal powder, resin powder, ceramic and electroplated metal as bonding agent, and the circular bonded abrasive tool with through hole in the center is called diamond grinding wheel (alloy grinding wheel). The following is a detailed introduction to its precision grinding optical glass:

With the wide application of optical glass in aerospace, optoelectronics, space technology and precision engineering, the requirements for processing efficiency and quality of optical glass are getting higher and higher. The fine abrasive wheel can realize the precision grinding of optical glass, but the processing efficiency is low and the dressing is frequent. The large abrasive wheel has the advantages of high machining efficiency and wear resistance. Among the electroplated grinding wheels, the constitutive model of the material is obtained from the nano indentation experiment results, and the grinding force is modeled according to the measurement of the normal force in the surface grinding experiment. Through the analysis of simulation results, it is concluded that under the same grinding parameters, the stress damage to optical glass caused by grinding with large abrasive wheel is less than that caused by grinding with fine abrasive wheel. Therefore, from the perspective of residual stress, the large abrasive wheel will cause less damage to the sub surface of the workpiece after grinding, which is more suitable for optical glass grinding.

Electroplated grinding wheel Finally, in order to further compare the grinding efficiency and processing quality of large abrasive wheel and fine abrasive wheel, large abrasive electroplated diamond wheel, fine abrasive resin bonded diamond wheel and cast iron bonded diamond wheel are respectively used for surface grinding of BK7 glass. By measuring the geometric error of the grinding wheel profile before and after grinding, the wear amount of the grinding wheel is obtained, and then the grinding ratio of the three grinding wheels is calculated. In addition, corresponding to the three kinds of grinding wheels, the optical glass is grinded under the optimal process parameters, and the quality of the machined surface and its subsurface damage are detected and analyzed. The experimental results show that the fine abrasive wheel can achieve higher surface finish, but the grinding ratio is less than 10; The surface roughness of optical glass ground with large abrasive wheel Ra ≤ 20nm, and the damage depth of subsurface layer is less than 3 μ m。 At the same time, on the premise of meeting the requirements of precision grinding, the grinding ratio is as high as 230.