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高速切削技术越来越引起人们的关注。实现高速切削的关键技术之一 ,是开发具有高速能力的高性能数控机床。机床主轴的转速近年来有很大的提高 ,而机床进给系统大多仍采用滚珠丝杆传动的方式 ,使机床的最大进给速度受到限制 ,阻碍了机床高速性能的进一步发挥。本文介绍了一种采用直线电机直接驱动的机床高速进给系统。采用非线性系统稳定性分析的方法确定系统的参数 ,并对伺服系统性能进行实验研究。实验证明 ,用这种方法优化该类系统 ,简单可行 ,可很好解决负载等直接干扰对系统性能的影响 ,为系统调试提供理论依据
High-speed cutting technology has drawn more and more attention. One of the key technologies to realize high-speed cutting is to develop a high-performance CNC machine tool with high-speed capability. The spindle speed of the machine tool has been greatly improved in recent years. However, most of the machine tool feeding systems still adopt the way of ball screw drive, which limits the maximum feed speed of the machine tool and hinders the further performance of the machine tool at high speed. This article describes a machine tool high-speed feed system that is driven directly by a linear motor. The nonlinear system stability analysis method is used to determine the parameters of the system, and the servo system performance is experimentally studied. Experiments show that using this method to optimize this type of system is simple and feasible and can well solve the influence of direct interference such as load on system performance and provide a theoretical basis for system debugging