大学毕业设计__真空镀膜机电气控制系统大学生大学生.docVIP

毕 业 设 计 题 目 真空镀膜机电气控制系统 控制系统主控单元采用PLC的FX系列的通过设置对纸张力、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. The composition of its overall structure is mainly composed 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 evaporation process are analyzed in this paper; and the winding system of roll and the roll tension control model is established, then finding out the relevant factors that affect tension, and adopt the fuzzy adaptive tuning PID control algorithm as the winding tension control system, the results showed that compared with the traditional PID control effect, the fuzzy adaptive tuning PID control algorithm is better and have strong adaptability; at the same time completing the proof analysis and design of the control system of soft, hardware structure, the design process of electrical control system is simulated by using PLC sim