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首页> 外文会议>2011 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering >Stick-slip mechanism study of CNC heavy-duty horizontal lathe feed systems based on dynamics
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Stick-slip mechanism study of CNC heavy-duty horizontal lathe feed systems based on dynamics

机译：基于动力学的数控重型卧式车床进给系统的滑移机理研究

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When CNC heavy-duty horizontal lathe feed systems is running at a low velocity, the stick-slip phenomenon will be introduced. The stick-slip phenomenon will seriously affect the working accuracy, work piece surface roughness and position accuracy. In this paper, structural characteristic of the feed system of CNC heavy-duty horizontal lathe is analyzed and gear rotor systems dynamics is applied to study the stick-slip mechanism of the feed systems. Elastic dynamics model of the feed systems which considers translatory degrees of freedom and rotational degrees of freedom is set up, at the same time, the influence of the time-varying stiffness excitation, deviation excitation and damping on the dynamics system is also considered. Elastic dynamics response of the feed systems excited by time-varying mesh stiffness and external load has been computed using the Newmark numerical method. Then, the carriage of the feed system displacement was simulated by LMS Virtual.Lab Motion Software as a contrast to the result of the dynamic response solved by numerical method. On this base, measure of avoiding the crawl phenomenon will be suggested.
机译：当CNC重型卧式车床进给系统以低速运行时，会出现粘滑现象。粘滑现象会严重影响加工精度，工件表面粗糙度和位置精度。本文分析了数控重型卧式车床进给系统的结构特点，并采用齿轮转子系统动力学研究了进给系统的粘滑机理。建立了考虑平移自由度和旋转自由度的进给系统弹性动力学模型，同时考虑了时变刚度激励，偏差激励和阻尼对动力学系统的影响。使用Newmark数值方法计算了随时间变化的网格刚度和外部载荷而激发的进料系统的弹性动力学响应。然后，通过LMS Virtual.Lab Motion软件对进给系统位移的托架进行了仿真，以与通过数值方法求解的动态响应结果进行对比。在此基础上，将提出避免爬行现象的措施。

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