PLC的C650车床控制系统设计+梯形图
毕业论文关键词：C650卧式车床；电气控制原理; S7-200PLC；梯形图
Control System of The c650 Lathe Design Based on PLC
Abstract:For traditional turning lathes having many examples of machine malfunctions, maintenance of troubles, circuit complexities, it’s not fit for the industrial production requirements nowadays more and more. After analyzing electrical schematics and control requirements, a new method was put forward by which using PLC to transform the control system of the turning machine. The design considered many aspects such as I / O points of the controlled object, ratio of the cost-performance, implementation and optimization of the control functions, as well as other sides. Thus mainly analyzed the control principles, the control devices selections, PLC's I / O points’ distributions and the process of control systems FIG programs. PLC control system has less connections, small size, low power consumption, higher control speed, higher reliability, more complete functions and many other advantages. Electrical control systems used in place of the relay control logic, together with the appropriate control system, which creates richer control functions of machine and makes more elevated automation level.
Key words: C650 Horizontal Lathe; Electrical Control Principle; S7-200 PLC; Ladder
目 录
摘要 1
引言 2
1.车床改造的背景意义及研究状况 2
1.1 车床改造的背景及意义 2
1.2车床改造国内外研究现状 3
2. C650卧式车床 3
2.1 C650卧式车床简介 3
2.2 C650卧式车床改造主要内容 5
2.3 C650车床的电气控制原理 5
3.系统元器件的概述与选择 9
3.1 PLC类型的简介 9
3.2 PLC的特点 10
3.3PLC型号的选择 10
3.4 电动机选择 11
3.5其它元器件的选择 12
4. PLC控制电路设计 13
4.1 PLC的硬件电路框图 13
4.2车床控制PLC输入/输出接口分配表 14
5. PLC软件梯形图设计 15
5.1车床控制系统梯形图 15
5.2梯形图状态监测 17
6.结束语 19
参考文献 19
致谢 20
基于PLC的C650车床控制系统设计 引言
近几十年来，工业生产越来越趋近于现代化、自动化。车床作为机械加工工业必不可少的设备，在工业生产中拥有重要的地位。而传统的电气控制车床由于自动化水平低、线路复杂、故障率高、检修麻烦等一系列因素。已经越来越不适应现代化工业生产的要求，正逐渐被数控车床所取代老式的车床全部废弃不用，会造成大量的资源浪费，所以对传统车床进行改造是一条不错的出路。近几十年来，PLC的出现，为工业控制开辟了一片新天地，给工业控制带来了史无前例的变革。随着技术越来越成熟，PLC的功能也越来越全面，已经成为许多控制领域的核心器件。古被设计采用PLC对车床的控制系统进行改造，这大大的简化了车床的硬件线路，降低了车床的故障率，而且辅以合适的程序，可大大提高车床的自动化水平，实现简单的数控功能，是传统车床重新焕发新的生机。