Optimization Design Of Magnetic Pole Array Scheme And Experimental Research Based On Magnetic Polishing

The proposal of the 2025 China Manufacturing Plan puts higher demands on the development of China’s industry.The demand for precision microcomponents in the highly sophisticated industries such as robots,the automotive industry,and the aerospace industry is increasing,and the requirements for the surface quality of these parts are becoming higher and higher.Due to various factors such as part shape,size,blind hole and small volume,the common fixture when machining this type of workpiece cannot hold it.It is not only necessary to re-customize the fixture,but the traditional deburring method is difficult or impossible to finishing the inner hole,edge and chamfer of the part.In response to this tough problem,it is proposed to use the magnetic grinding technology to precisely process the workpiece’s deburr.This paper analyzes the working principle and material removal mechanism of magnetic polishing technology.The layout of permanent magnet poles is improved by simulation design and a series of process experiments are carried out based on the optimization scheme.Based on the theory of electromagnetism,this paper analyzes the force of the magnetic needle in the rotating magnetic field,and determines the main processing method of the magnetic workpiece for the workpiece in magnetic polishing.The movement mode of the magnetic needle during the polishing process was analyzed,and the specific processing principle and material removal mechanism of the magnetic polishing machine were elaborated.Through the model simulation,the variation of magnetic induction intensity under different schemes is obtained,analyzing and predicting the results of the magnetic needle flow state of different schemes.The changes of the effective processing area of the magnetic needle flow state when different magnetic needles are added under different magnetic pole number arrangements are studied respectively.Observed and compared the trend of the effective processing area ratio when the magnetic needle flow state changes with the number and direction of magnetic poles,the best solution for the magnetic needle flow state is given and verified by experiments.It is found that the burr removal efficiency and processing effect of the optimized magnetic pole arrangement scheme 3 in three different magnetic pole layout schemes are the best.The effects of magnetic needle specifications,motor frequency,magnetic needle addition,processing time and polishing fluid on experimental results were studied through a large number of experiments by using improved magnetic polishing machine.The 6061 aluminum alloy parts were magnetically polished by orthogonal test method,and the optimum processing parameter level was determined by multi-index equilibrium analysis method from range analysis and variance analysis,which provides a certain guiding significance about the selection of the process parameters of the type of workpiece in industrial production in the future.