Prediction of surface roughness ratio of polishing blade of abrasive cloth wheel and optimization of processing parameters

Abrasive cloth wheel is significantly flexible at high-speed rotation and could realize adaptive micro-surface contact polishing of the blade of aviation engines. To reduce surface roughness and improve the surface integrity and mechanical property of the blade of aviation engine, this study determined the primary and secondary processing parameters by using orthogonal test and range method. Results show a significant linear correlation between blade surface roughness before and after polishing. A range of polishing parameters for orthogonal central combination test was determined based on the tendency chart. A roughness ratio prediction model was established based on the orthogonal central combination test results. This model was verified significant by variance and diversity analyses. The polishing parameters were optimized using response surface method. Finally, polishing experiment using a blisk confirmed the reliability of the established prediction model and the optimized parameters.