摘 要：数控钻孔机控制系统是用在孔加工机床上，以可编程序控制器为主控制器，控制钻头相对于工件的定位，由一个定位点向另一个定位点的控制系统。该系统由可编程序控制器、步进电机驱动器、步进电机、触摸屏等构成。PLC是专为工业环境设计的一种工业控制计算机，具有抗干扰能力强、可靠性极强、体积小、编程方便等特点。利用可编程序控制器脉冲输出指令控制步进电机的转速、方向和移动距离，从而实现精确定位。触摸屏可用来显示机器当前运行状态，保存配方数据，还可以设置运行参数。所设计的数控钻孔机控制系统的具有自动控制、手动控制、运行监控、参数设置等功能。
关键词：数控钻孔；可编程序控制器；步进电机；触摸屏；定位控制
Abstract：The control system of NC drilling machine which takes the PLC as the main controller is used in drilling machine. It controls the aiguille moving from one positioning to another positioning relative to the positioning of the workpiece. The system consists of PLC, stepper motor driver, stepper motor, HMI, and so on. PLC that designed for the industrial environment specifically is an industrial control computer. It has many advantages, for example, anti-interference capability, high reliability, small size and easy programming and so on. PLC used Pulse Output Function to control the stepper motor speed, direction and distance of movement, accordingly realizing the purpose of exact orientation. HMI can be used to indicate the system’s operating state, to preserv the Filing data, but also can be to set operating parameters. NC drilling machine control system which is designed has automatic control procedures, manual control, operational control, parameter setting, and other functions.
Keywords：NC Drilling；PLC；Stepper Motor；HMI；Position Control
