Mechanism And Experimental Research Of Removing Edge Burrs Of Group Holes Based On Magnetic Abrasive Finishing

Hole parts are widely used in the aerospace field as an important part.However,with the increasing demand for new materials and difficult-to-process materials in this field,the difficulty of making holes has been increasing.In particular,some parts with group holes,such as nickel-based superalloy parts with group holes in key positions such as engines and radiators,have strict requirements on the exit of the hole,the entrance burr and the surface morphology of the hole.Generally,the burrs of hole parts can be removed by traditional grinding methods,but for the small and dense group of holes,the traditional solution has limited removal quality and removal efficiency of the hole edges.In response to this situation,this paper proposes a method of removing edge burrs of the hole based on the magnetic abrasive finishing.The method can realize the flexible finishing processing of the edge of the group hole by the physical characteristics of magnetic abrasives are absorbed by the force of a magnetic field.This paper uses finite element software to simulate the drilling process of nickel-based superalloy samples and analyze the types of burrs.Based on the mechanism of magnetic abrasive finishing,a new scheme for efficiently removing the edge burrs of the nickel-based superalloys is planned,and the burr height is used as a measurement index to analyze the influence of different process parameters on the edge burrs of group holes during the magnetic abrasive finishing process.Finally,this solution can not only remove burrs,but also ensure that the edges will not be damaged by the rigid contact of the tool.The main research contents are as follows:(1)Compared with the research status of burr removal at home and abroad,the basic idea of removing burr on the edge of group holes by magnetic abrasive finishing technology was put forward.(2)The drilling process of the nickel-based superalloy sample plate was simulated by ABAQUS software,and the type of burr was analyzed.Based on the mechanism of magnetic abrasive finishing,the characteristics of the removal of edge burrs by the magnetic abrasive particles were analyzed,and a feasible scheme for efficiently removing the burrs on the edge of the holes was proposed.(3)The simulation of the magnetic field was carried out with Maxwell software,and the influence of the magnetic pole type and slotting method on the magnetic field distribution was analyzed;The grinding trajectory was simulated with ADAMS software and the influence of the trajectory parameters and motion path on the force of the edge burr was analyzed.(4)The experiment was designed and conducted,and the burr height was used as a measurement index to discuss the influence of different process parameters on the edge burr of the group hole during the magnetic abrasive finishing process.The influence degree of the two main grinding parameters,the rotation speed of the magnetic pole and the average particle size of the abrasive,was analyzed.The experiment verified that a better combination of grinding process parameters was obtained.