弯管机控制系统设计PLC控制和编程.doc

弯管机电气控制系统设计 摘 要 本文以河北沧州盐山县电力管件有限公司给的弯管机系统为设计和写作背景，介绍了弯管机的工作原理、工艺流程、软件编程控制。详细阐述了电气控制系统的特点以及应用。 弯管机广泛应用于石油行业，同时在国家开发的西气东输的工程中也得到了应用，可见弯管机在我国机械事业中占有重要的地位，它的发展也体现了我工国业的发展。现代弯管的特点是大口径，厚臂管，针对这一特点我们采用中频液压加热弯管机对其弯管。采用PLC来控制弯管机，用上位机显示温度、速度等，能更好的控制弯管的质量和效率。 本文介绍了弯管机的工作原理和简单工艺流程， PLC结构、内部原理、使用性能，以及S7-200内部结构和使用它编写弯管机控制程序。使用S7-200可编程控制器在恶劣环境下比继电器、接触器安全、可靠、耐用，并且直观，应用灵活。最后以STEP-7编程软件编写梯形图弯管机的控制程序，以此来控制弯管机弯管时所需的温度和速度。 关键字：弯管机； PLC ；控制系统 ；软件编程 Pipe Bender Electric Control System Design Abstract In this paper, Cangzhou, Hebei Yanshan Electric Power Pipe Fittings Co., Ltd. to the pipe system for the design and writing background, introduced the working principle of bending machine, process, control of software programming. Described in detail the characteristics of electrical control systems and applications. Bending machine is widely used in the oil industry, while the national development of the West-East Gas Pipeline Project has also been applied, can be seen bending machine mechanical cause in our country played an important role, it also reflects the development of industry. Elbow is characterized by modern large-diameter, thick arms and tubes, we have adopted for this characteristic frequency heating hydraulic pipe bender its. PLC used to control bending machine, the host computer display temperature, speed and so on, to better control the quality and efficiency of pipe. This paper introduces the working principle of the bending machine and a simple process, PLC structure, internal principle, the use of performance, as well as the internal structure of S7-200 and use it to prepare bender control procedures. The use of S7-200 programmable logic controller in adverse circumstances than the relays, contactors safe, reliable, durable, and intuitive, flexible application. STEP-7 Finally, the preparation of ladder diagram programming software of the control procedures pipe bender, pipe bender in order to control the temperature required to bend and speed. Keywords: bendi