基于PLC的注塑机控制系统设计论文.doc

PAGE PAGE 1 郑州航空工业管理学院 毕 业 论 文（设 计） 2012 届 电气工程及其自动化 专业班级 题 目 基于PLC的注塑机控制系统设计 姓 名 学号 指导教师 职称 二О一 二 年 五 月 二十四 日 内 容 摘 要 注塑机是集机、电、液于一体的典型系统，因具有能一次成型复杂制品、后加工量少、加工的塑料种类多等优点，目前已成为塑料成型加工的主要设备。传统中小型注塑机电气部分大多采用继电器控制，随着电子技术的不断进步与发展，其缺点越来越显著的表现出来，其主要表现为线路复杂，继电器动作慢、寿命短，系统控制精度差，故障率高，维修难度大等。针对上述问题，此次毕业设计注塑机的控制系统采用PLC控制系统进行控制。通过编程把各种电气保护和传感信号作为输入，各动作工序作为输出。提高了系统的控制精度，可靠性好，且易于检修。 本文介绍了注塑机的机械结构和控制原理,其次分析了注塑机的基本控制要求和工艺流程，最后给出了PLC控制系统的硬件组成和软件设计方法。 关键词 注塑机;PLC;温度检测;步进控制 Abstract Now injection molding machine is a mechanical, electrical and fluid in one typical system, because of the complexity can be a molding products, less processing, and processing various types of plastics, etc., has become the plastic molding process major equipment. Traditional small and medium-sized electric injection molding machine used relays to control the most part, with the advances in electronic technology and development, its becoming more and more obvious shortcomings of the show, the main line performance for the complex, slow relay, short life expectancy, the system control poor accuracy, the high failure rate, maintenance, etc. is very difficult. In response to these problems, the graduate design of the control system of injection molding machine control system using PLC control. Through the programming to a variety of electrical protection and sensor signals as input, processes the output of the action. To improve the control of the system accuracy, reliability, and easy maintenance. This paper introduces the working principle of injection molding machine, then analyses the controlling system and technicality process, and finally given its PLC control system hardware and software design. Key words :injection molding machine；PLC；temperature test；stepping control 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc325696665 第1章 绪论 PAGEREF _Toc325696665 \h 4 HYPERLINK \l _Toc325696666 1.1注塑机的发展史 PAGEREF _Toc32569666