| As the development of the science and technology,super smooth surface processing technology increasingly wide application in optical instruments,high-precision machinery,aerospace and other fields.The requirement of the surface processing quality in many areas has become increasingly demanding with the upgrading of products.Ultra-smooth surface processing technology has become a hot research direction in current manufacturing.In order to better get super smooth surface,the paper study hydrodynamic suspension polishing according to the new polishing method.The new method introduces a new polishing constraint boundary,control fluid border which can effectively improve the dynamic pressure fluid processing region and improve the uniformity of the pressure distribution.The method is more conducive to get less damage-free ultra-smooth surface.The main contents of this paper are:(1)Based on the theory of fluid dynamics,study the fluid motion characteristics,analyze the motion state of the abrasive particles separated from the flow field during the polishing,and learn the removal theoretical removal of material.(2)Establishing the overall flow field three-dimensional model of hydrodynamic suspension polishing,simulate the polishing progress to obtain the distribution of fluid pressure and the velocity of the particles.The influence of the rotational speed,the machining gap and the polishing liquid concentration on the dynamic pressure and the abrasive particle velocity are discussed by the method of orthogonal design.(3)Establishing the finite element model of grains hit the surface to simulate and analyze the residual stress,compared different effects with abrasive particles impact on the surface of the copper workpiece with different incident speed and incident angle.(4)Based on the hydrodynamic suspension polishing systems,measure the dynamic pressure on the work surface during the polishing,and study the effect of the rotational speed and the machining gap on the fluid dynamic pressure. |
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