Research On Topological Grinding Mechanism Of Fish Scale Structured Surface

The structured surface of fish scales can improve the contact performance of the object and effectively reduce the fluid resistance on the surface when the object moves in the fluid.Due to the excellent fluid drag reduction performance of the fish scale structured surface,how to make the fish scale surface in practical engineering applications has also become a hot issue of concern.At present,the manufacturing methods of the structured surface of fish scales mainly include micro hot embossing method,micro plastic casting method,soft engraving technology,ultrasonic vibration assisted milling method and laser engraving technology.However,when faced with mass production and difficult-to-process materials,the above methods have their own limitations in mass preparation of fish scale structured surfaces.In this paper,starting from the morphological characteristics of the structured surface of fish scales,the structure and arrangement properties of the units are analyzed,and the corresponding topological characteristic parameters are extracted.Combined with the extracted topological feature parameters,the corresponding fish scale structured surface model is established.From the point of view of point set topology,combined with the related analysis of grinding motion and related problems of "homeomorphism" transformation,a fish scale structured grinding wheel was designed and manufactured.When designing fish-scale structured grinding wheels,combined with the topological characteristic parameters of fish-scale structured surface and the creation conditions of fish-scale structured surfaces,a fish-scale structured grinding wheel with different arrangement of horizontal and vertical is designed.According to the arrangement in a certain direction,combined with the relevant grinding parameters,several groups of grinding wheels with different grinding wheel radii and different contour sizes of the abrasive cluster unit are designed.The trajectory equation of the abrasive particles was established,and the grinding kinematics simulation was carried out based on MATLAB software.The influence of different grinding parameters on the structured surface morphology of fish scales was discussed.Based on the simulation results,the design of the fish scale structured grinding wheel was optimized to determine the grinding wheel Characteristic parameters,and corresponding grinding parameters.The designed fish-scale structured grinding wheel is manufactured by electroplating method,and the relevant theory of the fish-scale structured grinding wheel grinding the surface of the workpiece is discussed through the grinding experiment,and the experimental results are compared with the simulation results,and relevant conclusions are drawn.The results of the study show that the fish-scale structured grinding wheel with two arrangement directions designed according to the relevant parameters of the fish-scale structured surface can grind the fish-scale structured surface in a plane workpiece.The length and spacing of the fish scale structured unit on the surface of the grinding wheel are related to the grinding parameters and the characteristic parameters of the fish scale structured surface.Through data analysis,when the relevant parameters and grinding parameters of the fish scale structured grinding wheel meet the boundary conditions,the overlapping fish scale structured surface can be ground.Under the condition that the characteristic parameters of the structured grinding wheel remain unchanged,changing the grinding parameters can grind the structured surface of fish scales with different combined states of the surface fish scale units,mainly in three forms: separation,connection and intersection.