Abstract
For the machining of both faces of thin cylindrical workpiece, it is used to do external grinding and internal grinding alternatively But considering the efficiency and the grinding rigidity, it is recommended to grind both external and internal faces at the same time In this paper, the mechanism of combined grinding method of shoe type centerless grinding and internal grinding is simulated. The influences of grinding conditions on correcting out of roundness in combined grinding have been analysed in the simulation and the results are as follows. The process of correcting out of roundness of internal face is influenced by the external correcting process It is recommended to take the angle 55° for front shoe and 5° for rear shoe to get high accuracy. In the case that the front shoe angle becomes even times of rear shoe angle the correcting process gets worse. High infeed rate of the wheel give good ability of correcting out of roundness but final out of roundness is small in the condition of low infeed rate and in the condition out of roundness in low frequency is removed easily.
