NC机床精密进给直线驱动器的研究

Study on Linear Actuator of NC Machine Tool Precision Feeder

本文介绍了一种采用“带压电元件，圆孤缺口杠杆和双平行四边形弹簧的多级放大的一体化结构”的新型直线驱动器的研究。实验表明：该直线驱动器的最大行程为４００μｍ，最大输出力为５０Ｎ，可控精度为０．ｓμｍ，频带宽为１００Ｈｚ，动作频率为５０Ｈｚ。该直线驱动器的特点是驱动力大、精度高、响应快、可直接用于ＮＣ机床、机器人等的精密驱动．

A new linear actuator is proposed in this paper, which has the feature of the piezoelectric element (PZT) circular notchedlevel and biparallelogram multiple amplifier in a body. Experiment results show that the linear actuator drivin rangeis 400 pm, the maximum driving force is 50N,the controlled accuracy is 0. 5 μm, the BW is 100Hz, operating frequency is 50Hz.The linear actuator has the following features:large drive force, ultrahigh accuracy and quick response.The linear actuator can be widely used in the procision direct drive of NC maching tool and robot etc.