Electro-mechanical Simulation Research For Feed Drive System Of Machining Center

Modern mechanical manufacture is becoming high speed, high precision, highperformance and automation. All walks of life make higher request to the performance ofmachinery, especially the dynamic characteristic of machinery. Based on the topologyoptimization and Electro-mechanical simulation technique, VMC80high speed machiningcenter was studied to resolve the complex dynamic modeling of multi-axis machine tooland how to improve the dynamic performance of servo system in this paper. The maincontributions of this dissertation are shown as follows:First, high stiffness and lightweight method was studied for the table of the machinetool based on topology optimization technique, and eventually realized reducing the totalweight while ensuring the rigidity, strength, and variation resistance.Then, by employing lumped-mass method and the finite element method，hybriddynamic model was established for machining center. Pre-tightening force, friction,parameters of joint surface, cutting forces and other non-linear factors are considered inthis model to research their influences. Finally virtual prototyping model of verticalmachine center has been set up in ADAMS.Finally, control system of the driving mechanism has been studied as well asmechanical system. Combined with the MATLAB, ANSYS and ADAMS software, thesystem-level electro-mechanical simulation platform has been established for the highspeed MC, which consists of the generation of tool path instructions, AC servo controlsystem, multi-body system dynamics and elasticity. The effects of servo control system,feed drive system, mechanical stiffness on CNC machining performance have beenconsidered in this platform. Using the integrated platform, a three-dimensional spatial camtrack was simulated eventually, whose result indicates that the proposed simulationplatform can be used to analyze and evaluate overall dynamic characteristics of high-speedMC. This also can be used in the servo parameter adjusting, NC machining trajectoryprediction and optimization etc.According to the research above, a feasible method was proposed for the structuraloptimization design, electrical and mechanical system modeling, control parameter tuningand the trajectory dynamic performance research of multi-axis CNC machine tools.