Research And Design Of Vibration Isolation Platform Of Machine Tool Monitoring Equipment Based On Nonlinear Mechanics

Traditional workshop monitoring equipment is mostly installed on the wall or far from the production line,and the working status of the machine tool cannot be well observed.An automation company has stricter requirements for product performance and higher requirements for product processing accuracy,and it is necessary to install monitoring equipment on the press machine tool to monitor the pressing process in real time,collect more accurate processing data,and achieve more perfect intelligent control.With the automation of CNC machine tools,the installation of monitoring equipment on machine tools will become a trend,and the design and research of vibration isolation systems for machine tool monitoring equipment is essential.In industrial production,different machine tools have different vibration frequencies,directions,and amplitudes.In order to meet the requirements of multi-directional vibration isolation and improve the vibration isolation bandwidth of the vibration isolation system,this paper designs a vibration isolation platform that can be applied to the vibration isolation of monitoring equipment on most machine tools.The main research contents are as follows:Based on the installation position and environment of monitoring equipment in different machine tools and machine tools,as well as the differences in amplitude and vibration frequency of machine tools,four groups of wire rope vibration isolators that can effectively isolate high-frequency vibration and four groups of cylinder-type air spring shock absorbers that can effectively reduce low-frequency vibration are connected in parallel to form a hybrid vibration isolation platform.Based on nonlinear mechanics,the mechanical model of wire rope isolator was analyzed,and the nonlinear stiffness,dry friction damping force and viscous damping force model of wire rope isolator were analyzed.Based on the ideal gas state equation,the elastic force and stiffness model of the cylinder type air spring shock absorber was established.Based on viscous fluid dynamics,the aerodynamic damping force model of cylinder-type air spring shock absorber with adjustable overflow area was established.A dynamic model of the hybrid vibration isolation platform was established.The nonlinear dry friction damping force function,the pneumatic damping force function,the dynamic equation matrix subfunction,the dynamic equation subfunction,the exciter function,and the frequency domain transformation subfunction were written using Matlab.The diameter and number of damping holes of cylinder type air spring are simulated and optimized.The response of nonlinear force under free vibration of wire rope vibration isolation platform and hybrid vibration isolation platform was studied.The time response of velocity,acceleration and displacement of wire rope vibration isolation platform and hybrid vibration isolation platform under free vibration was analyzed.The vibration response of the wire rope vibration isolation platform and the hybrid vibration isolation platform under different frequency and acceleration excitation was compared and analyzed.According to the simulation conclusion,a vibration test platform was built to simulate the vibration of the machine tool,and the vibration data of the vibration table,hybrid vibration isolation platform and wire rope vibration isolation platform under 50 Hz excitation vibration were collected.The vibration response of the hybrid vibration isolation platform,the wire rope vibration isolation platform and the unisolated vibration table under 50 Hz excitation vibration in the vertical and horizontal directions was compared and analyzed,and the vibration response of the vibration isolation platform as the excitation gradually disappeared.The vibration isolation effect of the hybrid vibration isolation platform and the wire rope vibration isolation platform under 50 Hz excitation vibration is compared.