Finite Element Analysis Of Polishing System And Optimization Of Polishing Process Parameter

At present, manual polishing has been occupying the dominating position for the mould polishing, especially for the complex shape die of automobile, Manual polishing makes hard working, unstable quality, low efficiency and prolonged production lead time of mould, it influences the update of automobile.Nowdays just a few large die companies use the full automatic polisher, because it is very expensive and can only be used in homogeneous polishing. Which leads to low mercantile rate of return. On the other hand, the disadvantage of the existing minitype polisher is that it cannot locate the load direction well. So developing the semiautomatic mould polisher is a feasible plan. Not only can it reduce the cost, but also it can decrease polishing workers'labor intensity, and increase the efficiency. In addition, it adapts any the mould company, and it can be used in both homogeneous and heterogeneous polishing as well.Based on abundant data this thesis analyzes mould especially characteristics and technics of automotive mould and it affirms that the polishing machine instead of manual polishing must have much convertibility, flexible orientation of itself and steady attachment power like an arm in order to adapt to different requirements in polishing. On the basis of the above investigations the author presents the floating semiautomatic polishing system design project, applied theories and realized functions and he also puts forward design drawing.This thesis makes ANSYS analysis of the floating semiautomatic polishing system and contact stress analysis between polishing disk and workpiece surface by ANSYS analysis software, and compare with the analysis results of the experiment of single grain push into the surface of workpiece and the slip-line field theory. The result shows the feasibility of the hypothesis of adhesion. Moreover, making use of orthogonal experiments, the paper analyzes the six factors which influence polishing surface roughness, and makes parameter optimization. The results of parameter optimization are used in experiments and satisfactory outcome has been reached, which makes a basis for the use of polishing machine.