In chapter three , the paper describes designing of machine constructions and transmissions in this system 在第三章中，具体介绍了钢管打捆机各个机械部分的设计。
In chapter two , by closely researching the required capacities and process principles of this system , project of system design is established 在第二章中，介绍了钢管打捆包装的性能要求，分析了打捆工艺，并确定了钢管打捆机的总体设计方案。
In chapter five , scheme of controlling software in this machine is discussed . functional blocks of softwares used in industrial pc and plc are divided 在第五章中，讨论了钢管打捆机控制软件的设计方案；划分了系统工业pc和主控plc软件的功能模块；给出了打捆工作软件的流程图。
In chapter four , integrated electrical system in this machine is given ; how to realize controlling all machine elements is narrated ; profibus technologies and its application in this machine are discussed 在第四章中，提出了钢管打捆机电气控制的总体方案；对各个机构动作的控制做了具体阐述；并分析了现场总线profibus技术在钢管打捆机中的应用。
The main topic of this paper is about steel pipe strapping machine . according to analyzing machine construction and process principle of this system produced by simatic group . germany , a global scheme of this system is provided ; controlling system of this machine is composed of profibus - dp as central technology , simatic plc as dpm1 , industrial pc as dpm2 is established 通过对德国西马特钢管打捆机的机械结构和打捆工艺原理的分析，提出了钢管打捆机的总体设计方案，确立了以profibus ? dp现场总线技术为核心；以西门子可编程控制器为第一类主站；以工业pc为第二类主站的钢管打捆机控制系统。
Firstly , the paper introduces currently developing condition of steel strapping machines and other technologies involved , at home and abroad . then , the existing shortcomings of steel pipe strapping machine in our country are given . the main work of this paper should be completed is concluded in this chapter 本论文首先介绍了钢管打捆机的国际，国内发展状况以及与其涉及的相关技术，接着分析了国内钢管打捆包装机械存在的不足，提出了本论文所要研究的主要工作。
