直线电动机在数控机床中应用的特殊性问题研究

Study on the Special Problems in Application of Linear Motor in Computer Numerical Control Machine Tools

直线电动机不需经过任何中间转换机构就可直接进行直线驱动,是现代数控机床高速、高精度伺服系统进给驱动的理想部件。详细讨论了直线电动机在数控机床上应用过程中的特殊性问题,包括直线电动机的选型、与机床本体的结构对接、电动机的发热与冷却、导轨的选择和工作台的轻化等,还分析了直线电动机的端部效应、防磁措施、法向磁吸力和伺服控制策略以及其它一些相关的特殊性问题,并提出了相应的解决方法。

Linear motor is an ideal components of the modem computer numerical control （CNC） machine tools for high-speed and high-precision. It can accomplish the linear movement without any intermediate conversion device. In view of the application in CNC machine tools, the special problems were discussed, including the type selection of linear motor, connection of machine structure, heating and cooling of the motor, choice of rail, lightening of the table and so on. The end effects of the linear motor, measures against magnetic, normal force and the servo control strategies were analyzed as well as other related particular questions. The corresponding reasonable solutions to the above problems were proposed.