毕业设计-----基于PLC的龙门刨床电气控制系统设计

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1、 I 摘 要 传统的龙门刨床控制系统可靠性差， 维护困难， 加工质量及生产效率低。 如今 PLC 技术的不断发展，用 PLC 设计电气控制系统是简便可行的方法。本文介绍的用 PLC 设计龙门刨床的电气控制系统，不但满足了所需的各种控制功能，而且在节省资金的 前提下，还具有结构简单，运行稳定和便于维护等特点。特别是其硬件简单可靠,软件 丰富灵活,运行效果好。 以可编程控制器检测速度过零为换向条件实现了工作台的无冲 击换向。以精密电位计为速度给定元件，可手动实时精确地调节主电机转速，从根本 上克服了龙门刨床换向冲击大、工作效率不高、耗电量大等一系列缺点。系统以数字 显示输出主电机实时转速和电枢电流

2、值，显示准确、直观。 利用 PLC 对龙门刨床电控系统进行设计的途径和方法， 为改进机床设计提供了新 的思路, 对促进工业企业技术进步具有一定意义。 关键词：可编程逻辑控制器；龙门刨床；控制系统；直流调速；刨台运动控制 II ABSTRACT The traditional control system of gantry planer has the shortcomings in reliability, maintenance,processing of quality and efficiency of production. Now as a result of the PLC te

3、chnology unceasing development, designing the electrical control system with PLC is a simple and feasible method.This paper presents the design of gantry planer with PLC for the electrical control system,which will satisfy the needs of control functions.Moreover, under the premise of saveing money i

4、t is also simple, stable and easy to maintain operational characteristics.Especially its hardware is simple and reliable,and its software is rich and nimble.The movement effect is good.The system realizes zero-speed reversing of the work platform and eliminates the impact of original system.The precise potentionmeters are in this system as the speed regulating elements.It can regulate the real-time rotational speed of the main electromotor accurately,and the disadvantages of the original system