The Application of Maglev Supporting Technology in NC Machine

摘要

Feed motion guides driven by linear motor in NC machine for industrial applications mostly adopt mechanicalsupport and they easily produce wear because of impact and high speed. For above characteristic and the requirementof machining accuracy, application of maglev supporting technology in NC Machine is raised. By analyzing the structureof maglev feed motion guide, the mechanical model of single-degree-freedom and multi-degree-freedom magnetic suspensionsystem is proposed. By MATLAB, the curve of stiffness and damper in steady state is gained from the two groupsof PID parameters, so that the influence of the controller parameters on the stiffness and damper is obtained and the vibrationarea of feed motion guides is made smaller. The conclusion can be reached that the performance of maglev feed motionguides is optimized by adjusting the parameters of controller properly that has an important theoretical significancefor improving machining accuracy of NC machine tools.