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The machine tool accuracy is comprehensively affected by geometric, thermal, and cutting force-induced errors. A key step in accuracy design and error compensation is error origins analysis. The object of this study is a MCH63 Precision Horizontal Machining Center. Based on the volumetric error model and using the measurement of error origins, the effects of geometric, thermal, and cutting force-induced...
Contact stiffness of machine tool joints is important but hard to be obtained. An integrated modal analysis method is proposed to obtain the contact stiffness of the joints. The method is composed of finite element method, lumped parameter method, and modal testing. By applying the modal testing data in the finite element and lumped parameter model of the whole machine tool, the contact stiffness...
This paper addresses the design and implementation of a digital tracking controller for a fast tool servo to drive the cutting tool to machine workpieces with noncircular cross section in a lathe. The main idea of the controller lies in its actively rejecting disturbance while maintaining the simplicity and intuitiveness of existing PID approach. The proposed active disturbance rejection controller...
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