Research on material removal of ultrasonic- magnetorheological compound finishing

Ultrasonic-Magnetorheologicai Compound finishing (UMC finishing) is a new technique for the ultraprecision machining of aspheric surfaces, especially for the ultraprecision machining of small-radiused concave surfaces and freeform surfaces. The principle of UMC finishing is introduced. Material removal in UMC finishing is studied when the flat workpiece is hold still. A model for material removal in UMC finishing is developed. Experiments are carried out to testify the proposed model. The results show that the shape of the material removal depth is close to the simulation results. Furthermore, the maximum material removal depth of UMC finishing is approximately proportional to the polishing time.