Study on optimization of energy consumption and surface quality of ultrasonic vibration-assisted polishing process based on entropy weight method

As a typical hard and brittle material, optical glass is an important part of various optical systems and is widely used in space probes, aerospace technology, and other fields. Due to the unique material properties, the optical glass is prone to form defects such as micro -cracks and sub -surface damage during processing, which adversely affect the surface quality and performance of the workpiece. Ultrasonic vibration -assisted polishing (UVAP) technology is one of the methods to achieve high -quality processing of hard and brittle materials such as optical glass. However, UVAP technology usually suffers from long processing cycles and high energy consumption, which is not consistent with the development concept of the low -carbon economy. In this study, a unified evaluating mechanism for the experimental results was established using the entropy weight method (EWM) from the perspective of green polishing. The UVAP process parameters were optimized for obtaining excellent polishing quality and satisfactory processing energy consumption. The experimental results showed that the maximum reduction rate of energy consumption was 80%. Meanwhile, the improvement rates of surface roughness Sa and Sq were more than 40%.