立式双柱坐标镗床PLC改造说明书毕业设.docVIP

1. 绪论 3 1.1 T4240B立式双柱坐标镗床PLC改造的背景和意义 3 1.2国内外研究概况 6 摘要 本论文是研究机械加工中常用的T4240B立式双柱坐标镗床传统电气控制系统的改造问题，旨在解决传统继电器——接触器电气控制系统存在的线路复杂、可靠性稳定性差、故障诊断和排除困难等难题。由于PLC电气控制系统与继电器——接触器电气控制系统相比，具有结构简单，编程方便，调试周期短，可靠性高，抗干扰能力强，故障率低，对工作环境要求低等一系列优点。因此，本论文对T4240B立式双柱坐标镗床电气控制系统的改造，将把PLC控制技术应用到改造方案中去，从而大大提高立式双柱坐标镗床的工作性能。论文分析了立式双柱坐标镗床的控制原理，制定了可编程控制器改造T4240B立式双柱坐标镗床电气控制系统的设计方案，完成了电气控制系统硬件和软件的设计，其中包括PLC机型的选择、I/O端口的分配、I/O硬件接线图的绘制、PLC梯形图程序的设计。对PLC控制立式双柱坐标镗床的工作过程作了详细阐述，论述了采用PLC取代传统继电器——接触器电气控制系统从而提高机床工作性能的方法，给出了相应的控制原理图。 关键词：可编程控制器，立式双柱坐标镗床，梯形图，电气控制系统 Abstract: This paper is to studies the machine process in common use T4240B in inside vertical double column jig boring machine electric control system improves problem. The aim is solving device complexity, inferior reliability and stability, malfunction analysis and trouble obviation of the traditional relay electric control system. Because of electric control system PLC there are lots of advantages which include design, install, connect the line and adjust to try workload small, the period of research and manufacture is short, reliability is high, the ability of Anti-interference is very strong, the rate of break down is low, the demand of work environment is low, maintenance convenience a series of advantage etc. Therefore, a work for to the T4240B vertical double column jig boring machine electric control system reforming, will reforming PLC control technique application in the project, then increasing vertical double column jig boring machine’s work function. The paper introduces to the control principle of the vertical double column jig boring machine, Established the programmable controller improve the design project of electric control system of T4240B vertical double column jig boring machine. Completed the design of the software and hardware of the electric control system, Among them include the model of PLC choice、PLC trapezium diagram’s design, It explains that PLC control the work process of vertical double colum