基于PLC和触摸屏的马口瓶装箱机控制系统设计

Design of Control System for Tinplate-bottle Boxing Machine Based on PLC and Touch Screen

目的为解决马口铁瓶番茄汁装箱过程的实时监控和可视化运行,提出基于PLC和触摸屏的马口瓶装箱机控制方法。方法在详细分析马口瓶番茄汁装箱机的工作流程的基础上,以S7-200PLC为控制器,实现对拾取箱板、装箱和胶装等3个工位的电气控制,进行气动原理设计、PLC编程设计和变频器参数设置;以TPC7062K触摸屏为人机交互界面,实现对运行过程的实时监控,完成监控系统设计,并系统调试。结果系统运行稳定、可靠,能够实时监控各个工位的参数变化,自动统计装箱数量。在纸箱尺寸标准、无折叠、变形的情况下,系统能够完成5箱/min的装箱工作,装箱合格率达到100%。结论系统的应用满足了控制要求,提高了自动化程度和生产效率,节省了人力成本,具有良好经济效益。

The work aims to propose the control method for tinplate-bottle boxing machine based on PLC and touch screen in order to solve the problem of real-time monitoring and visual operation in the process of packaging tinplate-bottle tomato juice. On the basis of detailed analysis on the workflow for packaging machines of the tinplate-bottle tomato juice and with S7-200 PLC as the controller, the electric control over three stations（picking-up boxboard, boxing and adhesive binding） was achieved, then the pneumatic principle and PLC program were designed and the parameters of the inverter were set. With TPC7062 K touch screen as the human-machine interface, the real-time monitoring of operation process was achieved, the monitoring system was designed and the system was debugged. Results showed that the system ran stably and reliably and it could monitor the parameter variation of each station in real time and count up the quantity of boxing automatically. The system could package five cases per minute with a percent of pass of 100% under the condition that the carton was of standard size, no fold and deformation. The system applied meets the control requirements and it has improved the automaticity and production efficiency. Moreover, it also has saved manpower cost with good economic benefits.