Study On Removal Mechanism And Surface Quality Of Copper-based Alloy Material By Magnetic Abrasive Finishing With Spherical Abrasive

Magnetic abrasive finishing technology,which is formed by combining magnetic field and magnetic abrasive with traditional grinding technology,is an advanced finishing technology.Due to its advantages,such as flexibility,self-adaptability,self-sharpening,simple equipment and so on,it is widely used in aerospace,medical equipment,modern industry and other fields.Copper-based alloy materials,as structural materials with excellent electrical conductivity,thermal conductivity and mechanical properties,are widely used in these fields.With the development of modern industrial,higher and higher requirements are put forward for the surface quality and performance of the copper-based alloy materials that are used in these fields.Magnetic abrasive finishing technology is an effective technical means to improve the surface quality and performance of products.Therefore,this paper focuses on two copper-based alloy materials of copper-based alloys,CW70 copper-tungsten alloy and B10 copper-nickel alloy,as the research object of magnetic finishing processing.By transforming the XK 7136 C CNC milling machine as the test device of the magnetic abrasive finishing system,and using the iron-based spherical composite magnetic abrasives as the grinding abrasive,which is prepared by our group by the atomization and rapid solidification method,the research was designed according to the response surface method and the orthogonal method,and the finishing experiment was carried out.The processing technology of two materials in magnetic grinding was optimized,the removal mechanism and surface creation mechanism of copper-based alloy materials in magnetic finishing was revealed,and the quality of the finishing surface was evaluated.This research will provide theoretical support and engineering test data for the popularization and application of a new type of atomized spherical magnetism.The main research contents and innovations of this article are as follows:1.Theoretical research on atomized fast-setting spherical magnetic abrasivesThe process of preparing spherical magnetic abrasives by the atomization rapid-setting method is described,and the abrasive characteristics of the atomized rapid-setting spherical magnetic abrasive particles are analyzed.The single-grain abrasive structure model is established,and the force analysis of the single spherical magnetic abrasive particle in the processing area is carried out.At the same time,the pressure on the surface of the material is analyzed and calculated.The factors affecting the fluidity of the abrasive are analyzed,and the energy conversion problem in the finishing process is discussed.2.Design of magnetic poles and construction of machining system for copper-based alloy finishingAccording to the performance parameters of the permanent magnet material,the appropriate neodymium iron boron permanent magnet pole is selected.The magnetic field intensity and the magnetic field line distribution of the magnetic pole is simulated through the ANSYS software.By comparing and analyzing the advantages and disadvantages of the end magnetic pole,the slotted magnetic pole and the copper sleeve slotted magnetic pole,the copper sleeve slotted permanent magnet pole suitable for the magnetic finishing of copper-based alloy materials is produced.The XK 7136 C CNC milling machine is modified,and a clamping system for abrasive materials is designed.3.Design and analysis of response surface and orthogonal experiment of CW70copper-tungsten alloy and B10 copper-nickel alloyThrough the single factor test,the influence of each process parameter on the surface quality of the workpiece is analyzed.The response surface method is designed to optimize the process parameters of the copper-tungsten alloy,and the experiment results are tested for significance.The optimal process parameters of the B10 copper-nickel alloy material are optimized by orthogonal test method,and the changes in the hardness of the material before and after grinding are observed and analyzed.The hydrophobic properties of the material before and after grinding are analyzed,providing basis and technical support for the next step to study the magnetic abrasive finishing of copper-based alloy materials.4.Theoretical research on the grinding of copper-based alloy materials with atomized fast-setting spherical magnetic abrasivesThe relative movement mode between the atomized quick-setting spherical abrasive and the processed material is analyzed.Through the analysis of the test results,the removal model of the copper-based alloy material in the magnetic finishing process is established.At the same time,problems such as the abrasive fluidity during the grinding process are summarized.Through the above research,the finishing of copper-based alloy materials has been achieved,and relatively ideal test results have been achieved,which has laid a good foundation for the next in-depth research and engineering promotion.