电子凸轮摇床头运动轨迹控制系统设计与研究

针对传统选矿摇床效率低、噪声大、摇床头内部结构复杂以及加工困难等问题,设计出一种由电子凸轮摇床头运动轨迹控制系统。通过对传统摇床头的运动特性、运动曲线规律和伺服控制等方面进行分析,提出了一种运用电子凸轮作为动力输出的控制系统。首先,选用PLC作为控制器,采用半闭环控制模式的伺服驱动器进行控制伺服电机;其次,以普拉特-奥运动曲线作为凸轮曲线加入到控制器内;最后,伺服电机连接滚珠丝杠来带动摇床床面实现不对称往复直线运动。结果表明,相对于传统的选矿摇床,电子凸轮摇床由PLC自动控制,更容易实现其运动轨迹的控制,有利于提高摇床的品位及回收率,且易于实现生产自动控制。

Design and Research on Motion Trajectory Control System of Electronic Cam Shaker Head

The traditional beneficiation shaking table has the problems of low efficiency, high noise, complicated internal structure of the shaking table head, and difficult processing. To solve these problems, a motion trajectory control system for an electronic cam swing head was designed. By analyzing the motion characteristics, motion curve and servo control of the traditional shaking table head, this paper proposes a control system using electronic cam as power output. Firstly, the PLC is used as a controller, and a semi-closed loop control servo drive is used to drive the servo motor. Secondly, the Plat-o motion curve is added to the controller as a cam curve. Finally, the servo motor is connected with a ball screw to drive the bed of the shaking table to realize an asymmetric reciprocating linear motion. The results show that, compared with the traditional beneficiation shaking table, the electronic cam shaker is automatically controlled by the PLC, which is easier to achieve the control of its trajectory, which is beneficial to improve the grade and recovery rate of the shaker, and is easy to implement automatic production control.