Dynamic Matching Design And Vibration Suppression Of Laser Cutting Machine

Modern machining and manufacturing for feed transmission system has a higher speed and positioning accuracy,so that the CNC equipment has higher performance.The transmission parts of the feed transmission system are all of quality and flexibility.In the process of high-speed and high-acceleration feeding,the transmission parts will vibrate because of the external excitation or the self-excited oscillation of the feed transmission system,which will affect the positioning accuracy and surface processing quality of the CNC equipment.At the same time,the service life of the CNC equipment will be greatly reduced,Serious will cause damage to the CNC system.Therefore,it is very important to study the dynamic response characteristics of the feed transmission system to improve the machining quality and efficiency of the CNC equipment.In this paper,a laser cutting machine is built with linear module,and the ball screw drive system of laser cutting machine is studied.The specific work is as follows:Firstly,the mathematical model of torsional vibration of the mechanical and electrical transmission system of laser cutting machine is established,and Lab VIEW is used for mathematical simulation analysis.At the same time,the vibration model is imported into Adams for entity simulation analysis.The simulation results verify the correctness of the mathematical model.By simulation curve analysis and summing up the equivalent torsion stiffness,inertia ratio,maximum vibration amplitude and vibration frequency of changes in the relationship between four.it gives the equivalent torsional stiffness and inertia ratio on transmission system the influence law of transient response and precision.Secondly,the specific working conditions of the laser cutting machine are introduced,through the dynamic matching design of the theoretical calculation of the transmission system,the specific parameters needed are calculated.At the same time,a method of dynamic matching design by using ADAMS software of virtual prototype is proposed.By comparing two methods of dynamic matching,the design method of dynamic matching by using virtual prototype can reduce the calculation process.Thirdly,the axial stiffness and contact stiffness of the ball screw pair are studied respectively,and the contact stiffness of the ball screw pair is simulated and analyzed by using the ANSYS Workbench.By comparing with the theoretical calculation,the results of simulation and theoretical calculation are in good agreement.The axial stiffness of the ball screw shaft is different under different fixing methods and different positions of nuts.Finally,the dynamic model of the axial vibration of the ball screw drive system is established,and the dynamic equation of the model is given.MATLAB is used to program the dynamic equation and Adams is used to simulate the model to verify the correctness of the mathematical model.The influence of the different position of the load,the differentinstallation way of the lead screw and the different load quality on the axial vibration of the transmission system is analyzed,so as to provide some improved methods for the suppression of the axial vibration of the transmission system.In the process of transmission system operation,an improved trapezoidal motion planning method is proposed to control the vibration of transmission system,and the effect of vibration suppression is obvious.The research results in this paper are of great significance to improve the positioning accuracy and machining quality of the laser cutting machine.