Structural Optimization And Working Performance Analysis Of Magnetorheological Polishing Prototype

With the development of science and technology,the traditional polishing technology has been unable to meet the modern optical system of optical components of the surface requirements.Magnetorheological(MRF)is an advanced optical processing technology which has overcome the shortcomings of the traditional optical parts processing methods.It can guarantee the low roughness of the machined surface,the minor sub-surface damage and high of the processing efficiency,is to obtain ultra-smooth surface of the ideal polishing technology.The study and development of this technology for promoting the development of China's optical processing technology has important engineering significance.Surface texture characteristics of optical components have a direct impact on the performance of good optical components,the surface texture uniform,homogeneous to the texture.The existing wheel type magnetorheological polishing machine is characterized in that the magnetic field generating device is fixed and the polished grain is relatively single.In order to avoid this situation and improve the uniformity of the surface texture after the workpiece is finished,the paper studied the surface texture of the polished workpiece on the basis of experiment and theory for the new reciprocating magnetorheological polishing machine.Polishing machine uses the reciprocating movement type magnetic field generator,simultaneously the spindle drives the work piece rotation with high speed,due to the superposition of motion,the work piece and the magnetorheological fluid polishing fluid form a kind of complex relative motion.In the polishing process,the randomness of workpiece surface polished texture will increase,making the workpiece surface texture uniform and smooth.And the magnetorheological polishing liquid in the polishing area of the workpiece can be continuously renewed and replenished due to the reciprocating movement of the magnetic field generating means,which will improve the polishing performance.In this thesis,we focus on the optimization of structure and polishing performance of reciprocating magnetorheological polishing machine,including the following aspects:(1)Domestic and foreign literatures have been consulted,and the development and research status of magnetorheological fluid,magnetorheological polishing technology and magnetorheological polishing machine have been relatively deeply understood and analyzed at home and abroad.(2)According to the structure problem of magnetorheological polishing test-bed,the overall structure of the reciprocating magnetorheological polishing test-bed is optimized by using the modularization idea,and the engineering drawings and processing are produced.(3)The magnetic field distribution of the magnetic field generator is simulated by ANSYS finite element software.The magnetic field and the magnetic field parameters are optimized according to the simulation result,which makes the magnetic field distribution more reasonable and weaken the problem of magnetic field heating..(4)The kinematic simulation of magnetorheological polishing test rig is carried out to analyze its kinematic performance.At the same time,the strength of the test-bed structure is analyzed,and the shortcomings are optimized and improved.(5)Technical information of reciprocating magnetorheological polishing test is.Carring out magneto-rheological polishing experiment with polishing fluid,then analyzing the performance of reciprocating magnetorheological polishing machine.Through the research of the paper,it shows that the optimization of magnetorheological rheology polishing experiment table can solve the original equipment problem and improve the performance,which is more beneficial to the experiment of magnetorheological polishing.The research results are of great engineering significance for the future development of reciprocating magnetorheological polishing machine and Magnetorheological polishing process.