Simulation Analysis And Experimental Research On Vibratory Barrel Finishing Of Workpieces Under Different Fixing Methods

Vibration barrel finishing can effectively remove burrs,surface oxide layers and edge rounding on the surface of the part,and can improve the physical and mechanical properties of the surface of the part,improve the stress distribution on the surface of the part,reduce the surface roughness of the part,and improve the brightness of the surface of the part,Eliminate all kinds of defects caused by mechanical processing on the surface of parts,improve the integrity of the surface of parts.Due to its good processing effect,low cost,and convenient and fast operation,vibratory barrel finishing is widely used in high-end equipment manufacturing industries such as aerospace,weapon industry,automobiles,and railway transportation.In vibratory barrel finishing,the processing of the workpiece is usually in a free state.In large-scale production or when processing large-sized parts,it will cause problems such as bumping of parts and low processing efficiency.Simulation and experimental research were carried out on horizontal vibratory barrel grinding and finishing,to explore the influence of the fixing method,fixed position and fixed angle of the workpiece on the rule of horizontal vibratory barrel finishing and finishing.The specific research contents are as follows:(1)Based on the EDEM software,the trajectory of the media in the horizontal vibration roller polishing process is analyzed.The trajectory is approximately circular.In the bottom area,the motion range of the media is the largest,and in the middle area,the motion range of the roller polishing block is the smallest.(2)Based on EDEM software,the dynamic behavior of vibration-type rolling polishing finishing is studied under two fixing methods.The results show that in the internal fixation method,the work force of the workpiece subjected to the media is about 5-6 times that in the external fixation method,and the speed of the media flowing through the workpiece surface is about 4-5 times that in the external fixation method.the workpiece is located in the area where the bottom area of the media is close to the right barrel wall,and the workpiece is subjected to greater force of the media,the speed at which the media flows through the surface of the workpiece,and the accumulated wear on the surface of the workpiece.(3)Experimental research on the processing effect of the horizontal vibratory barrel finishing of the workpiece under different fixing methods,comparing the processing effects of the two internal and external fixing methods,summarizing the processing rules,analysis shows that:in the internal fixation method,the time required for each region of the workpiece to reach the limit surface roughness is shorter,and the limit surface roughness value that the workpiece can reach is 40%-50% of the external fixation method,the surface uniformity after processing is better and the surface processing effect is better.(4)In the internal fixing method,by analyzing the processing effect of the horizontal vibration finishing on the workpiece in different depths and horizontal positions,the relationship between the processing position and the surface roughness is fitted to find the optimal workpiece The processing position is: embedding depth 220 mm,275mm away from the left barrel wall,and has been verified by experiment.In this paper,the discrete element software is used to analyze the particle dynamics behavior of the workpiece in different fixing methods and positions,and the effect of the fixing method on the machining effect of the workpiece is experimentally studied.Grinding and finishing processing vacancies in the fixation of workpieces.