The Application of Maglev Supporting Technology in NC Machine

ABSTRACT

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

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