Study on dynamic parameters of hydrodynamic suspension polishing for metal mould

HOU Haipeng, HONGTao, JI Shiming, WANG Chaorong
(The MOE Key Laboratory of Special Purpose Equipment and Advanced Processing,
Zhejiang University of Technology, Hangzhou 310032, China)

Abstract: In order to solve the problem of automatic polishing for complex cavity and abnormity bores of mould, the system of hydrodynamic suspension polishing for metal mould was established. In order to control the position and speed, a suitable monitoring software of fluid pressure was built. And then the relationship of fluid speed and pressure distributions was established, the material removal model was researched based on hydrodynamic theory. In addition, the influence of polishing tool rotate speed and clearance on fluid pressure was obtained. The polishing effect experiment with rotate speed 6 000 r/min and polishing clearance 60 μm was done. The results indicate that a better polishing effect using the parameters, and the surface of Ra30 nm can be obtained for work piece.
Key words: mould; hydrodynamic suspension; polishing; precision machining