毕业设计真空镀膜机电气控制系统.doc

毕业设计
题目真空镀膜机电气控制系统
学院自动化与电气工程
专业电气工程及其自动化
班级电传1002班
学生黄瑶妹
学号 20100321072
指导教师李聪
二〇一四年六月四日
摘要
本文所研究的真空镀膜机是一种蒸发式卷绕系统的镀膜机,主要应用于PET、OPP、BOPP等塑料薄膜上蒸镀金属膜,也可应用于生产镀铝、镀锌铝或镀银锌铝电容膜。其总体结构主要由真空系统、卷绕系统、蒸镀系统及电控系统组成,通过PLC来实现对真空系统的各种泵、阀门等开关量的控制,通过三菱触摸屏实现后台管理、各种工艺参数的设定及控制功能,自动化程度较高,有利于生产效率的提高。
该电气控制系统主控单元是采用三菱PLC的FX系列的通过三菱触摸屏设置对纸张力、电机速度、蒸发舟的状态和蒸发量等工艺要求参数的控制,同时具有故障报警、保护路线的功能,由RS232/485串行接口、A/D转换模块和控制器等实现各种参数的传输、信息处理、检测控制功能。
文中首先对镀膜机的真空系统和整个蒸镀工艺过程进行了分析;并建立了卷绕系统中放卷、收卷的张力控制模型,找出影响张力的相关因素,并采用了模糊自适应整定PID控制算法作为卷绕系统张力控制策略,结果显示比传统的PID控制效果好,适应性强;同时完成了控制系统软、硬件结构的论证分析和设计,设计过程中采用三菱PLC仿真软件对电气控制系统进行了模拟仿真,并实现上位机与PLC的通讯功能,仿真结果显示,该真空镀膜机自动化程度高,模拟蒸镀效果好,保证了镀膜质量,整个设计图由AutoCAD2007画出。
关键词:真空镀膜机;可编程控制器;张力控制;人机界面;AutoCAD2007
ABSTRACT
In this paper, Vacuum coating machine, which is developed by this paper is an evaporation-type winding coating machine, mainly used in PET, OPP, BOPP and other plastic film evaporated metallic film, also can be used in the production of aluminum, galvanized aluminum or silver plated zinc aluminum capacitor film. position of its overall structure is posed of a vacuum system, winding system, evaporation system and electric control system; On the one hand, through the PLC to control pump of the vacuum system ,valve switch and so on, on the other hand, through Mitsubishi touch screen to conduct back-stage management and control and set all kinds of Process parameters, this will improve the degree of automation and Is conducive to the improvement of production efficiency.
The electric control system of main control unit is controlled by Mitsubishi FX series, through Mitsubishi touch screen to set and control evaporation process on paper tension, motor speed, evaporation boat required parameters, besides fault alarm, protection route function. By RS232/485 serial interface and A/D conversion module controller to achieve various parameters transmission, information processing, detection and control function.
Firstly, the vacuum system for coating machine and the evapor