Normal contact characteristics of scraped surfaces
Scraping has a significant effect on improving the contact characteristics of the joint surface.In order to further study the normal contact characteristics of the scraped surface,different precision scraped and grinding surface morphologies were obtained based on a three-dimensional topography instrument,and micro texture morphologies were simulated based on the W-M function.Reverse modeling obtains scraped surface,grinding surface,and micro textured surface,and establishes a normal contact simulation model.Conduct nonlinear contact simulations analysis and compare the contact characteristics of different precision levels of scraped surfaces,grinding surfaces,and micro textured surfaces under different loads.The analysis results indicate that under the action of load,scraping,grinding,and simulating micro texture surfaces first come into contact and generate elastic deformation at high points or micro convex bodies.As the load increases,plastic deformation gradually occurs,and the contact stress,deformation,and contact area also increase accordingly;When the load is 80 N,the true contact area of Grade I precision scraped surface is greater than that of precision grinding surface,but smaller than that of micro textured surface.The contact characteristics of Grade I precision scraped surface are better than that of precision grinding surface;Under the same load,the total deformation of Grade I precision scraped surface is less than that of precision grinding and simulated micro textured surface,and its contact stiffness is greater than that of precision grinding and simulated micro textured surface.Scraping processing can effectively improve the contact characteristics of the joint surface.
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