基于PLC的注塑机控制系统设计说明书.doc

武汉工程大学 毕业设计（ 论 文） 论文题目 基于PLC的注塑机控制系统设计 学 号 学生姓名 专业班级 02 指导教师 文小玲 总评成绩 2015 年 月日 关键词：Abstract The control system of injection molding machine is an important part of the whole machine, the pros and cons of the performance of the machine is essential. In this thesis, I determine the design and ideas of the control system of the injection molding machine firstly. According to the comparison with the single-chip control, the computer control and the relay contractor control, PLC is chosen to control the action of the injection molding machine. When the properties of the PLC input and output interface is determined, I classify and number the detection switch, limit switch, manually operated switch and master switch of the injection molding machine in order to determine the number of I/O put. Based on the number and types of input and output, we could determine the model of the PLC is the FX2N-MR. Then the design of the main circuit and the control circuit is completed. According to each action of the injection molding machine, the process flow diagram is worked out. Then the action flow diagram of the injection molding machine is completed according to the process flow diagram. At last, we could work out the state transition diagram according to the action flow diagram, and write down the stepladder in accordance with the state transition diagram. Keywords: Injection molding machine, Programmable logic controller, Control system, State transition diagram, stepladder  目 录 摘要 I Abstract II 1．绪论 1.1 课题研究的意义 2 1.2 课题的主要内容 3 2．注塑机控制系统的工艺过程 2.1注塑机的结构 4 2.2系统工艺各流程的要求 5 2. 3系统工艺总流程图 7 3．注塑机控制系统的总体设计 3.1 系统总体设计 8 3.2 系统硬件设计 10 3.3 系统软件设计 24 4. 课题总结 34 致谢 35 参考文献 36 1 绪 论 1.1 课题研究的意义 注塑机具有能一次成型外型复杂、尺寸精