Design and dynamic pressure distribution of linear hydrodynamic polishing machine
                                                         SHEN Zhang jun, WEN Dong hui, YUAN Qiao ling
                         （School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China）

Abstract: Aiming at the problems such as low and unbalanced fluid pressure， inevitable centrifugal force， a linear hydrodynamic polishing method was put forward. This method is based on fluid hydrodynamic lubrication theory，usin g the polishing roller in fluid surrounding at high speed rotation to drive the slurries to realize the process of micro wipe off of workpiece surface. A new polishing roller was put forward and different kinds of grooves were also designed to strengthen the effect of hydrodynamic pressure. Fluid model in polishing environment was also simulated by CFD software to get the result of fluid pressure distribution of linear hydrodynamic polishing and compare it with former achievements， it was found that the new device could form a more powerful dynamic fluid pressure than former devices. The results candidate that the new device could form a more powerful dynamic fluid pressure than former devices， that means this linear polishing method is better to enhance the fluid pressure in working area and problems like pressure unbalance and centrifugal force， so that to meet the requirement of ultra precision polishing better.

Key words: new type; hydrodynamic; rotation roller; polishing; numerical simulation