全电动注塑机专用数控系统的关键技术研究与实现

发布时间：2018-04-26 09:31

本文选题：全电动注塑机 + 控制系统　；参考：《华中科技大学》2013年硕士论文

【摘要】：自上世纪五十年代推出螺杆式塑料注射成型机至今，由注射成型工艺生产的塑料制品已经占据塑料制品总数的80%之多，注射成型机作为一种重要的塑料加工设备，其产量仍在逐年增加。近年来，随着全球能耗问题的日渐突出和人们环保意识的逐渐增强，具有节能、精密及高速稳定等优势的全电动注塑机已经打破了传统液压注射成型机垄断行业的局面。而在这一领域，我国目前尚不具有完全自主知识产权的研发生产能力。本课题围绕“华中8型”高档数控系统展开工作，通过数控系统二次开发的方式尝试突破全电动注塑机专用数控系统中的若干关键技术，本文主要针对全电动注塑机专用数控系统的锁模机构运动控制以及料筒加热温度控制这两个关键技术进行了深入的研究工作。本文在完成控制系统整体设计的基础上对肘杆式开锁模机构进行了力学分析，采用状态机编程对开锁模机构的功能实现方案进行了详细的分析和研究，完成了开锁模机构的压力控制及运动控制，实现了全电动注塑机生产需要的若干特殊功能；在料筒加热模块的温度控制方面，通过模糊PID的控制方法达到了较为理想的实际效果，，提出了PWM信号均匀输出的算法，并对料筒的解耦控制和热力学特性进行了初步的分析。实验表明，本文所做的工作已初步了满足全电动注塑机实际生产的基本要求。
[Abstract]:Since the introduction of the screw plastic injection molding machine in the 1950s, the plastic products produced by the injection molding process have accounted for more than 80% of the total number of plastic products. The injection molding machine is an important plastic processing equipment. Its output is still increasing year by year. In recent years, with the increasing global energy consumption and the increasing awareness of environmental protection, the all-electric injection molding machine with the advantages of energy saving, precision and high speed stability has broken the monopoly situation of traditional hydraulic injection molding machine. But in this field, our country does not have completely independent intellectual property right research and development production capacity at present. This paper focuses on the high-grade CNC system "Huazhong 8", and attempts to break through some key technologies in the special NC system of all-electric injection molding machine by the way of secondary development of CNC system. In this paper, the motion control of the locking mechanism and the temperature control of the cylinder heating in the NC system of all-electric injection molding machine are studied in depth. Based on the whole design of the control system, the mechanical analysis of the locking mechanism with elbow rod is carried out in this paper, and the function realization scheme of the locking mechanism is analyzed and studied in detail by state machine programming. The pressure control and motion control of the locking mechanism are completed, and some special functions for the production of all-electric injection molding machine are realized. The fuzzy PID control method is used to achieve ideal practical results. An algorithm for uniform output of PWM signals is proposed, and the decoupling control and thermodynamic characteristics of the barrel are preliminarily analyzed. The experimental results show that the work done in this paper has met the basic requirements of the practical production of all-electric injection molding machine.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TQ320.52;TP273

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