The Structure Design And Simulation Analysis Of Double Mass Magneto-rheological Damping Boring Bar

It is a essential question that how to improve the quality of processing,processing efficiency and machining precision for machinery manufacturing technology in particular metal cutting.Boring is one of the important methods of hole processing,but because of the limitation of boring bar length to diameter ratio,it leads to flutter phenomenon during manufacturing process,which not only undermines the quality of the workpiece surface,but also speeds up tool wear.So this paper introduces increasingly mature magnetorheological fluid technology to vibration boring bar and presents the structure of double mass magneto-rheological damping boring bar,in order to provide a new thought for the boring class processing technology and a new verification for the vibration damping performance of the shock absorber.In order to achieve superior vibration damping performance of double mass magneto-rheological damping boring bar,three degree freedom differential equation is gained by establishing its dynamical model.Besides,the effects of dimension are eliminated by dimensionless method.Then,its parameters are optimized through software as well as compared with the amplitude-frequency characteristic curve of ordinary boring bar of single degree of freedom and two-degree-of-freedom single mass magneto-rheological damping boring bar.The vibration damping performance of the designed boring bar is proved theoretically.After achieving structure design and three-dimensional model of double mass magneto-rheological damping boring bar,the next work is to choose materials of main components,to design and optimize the magnetic circuit and size,which ensure that the most suitable materials,the most reasonable magnetic circuit layout and the ideal size parameters are applied to boring bar.The flexible body model of shock-absorption boring bar is established through ADAMS software and ANSYS software,the frequency response simulation and modal simulation are completed,the simulation result of single degree of freedom as well as two-degree-of-freedom single mass magneto-rheological damping boring barare analyzed that verifies the superior vibration damping performance once again.Finally,this paper researches and analyzes the effect of the density of bumper blocks,the radial stiffness of rubber components and the damping coefficient of magnetorheological fluid on vibration damping performance of vibration damper.It turns out that the dynamic model is reasonable and the material is suitable through the simulation results curve.