The Research Of Control System On Preheating Flash Butt Welding Machine Used In Steel Chains

With the development of China's industry, the demand for energy is increasing year by year. In the same time, the demand for high-intensity ring chain is also growing accompanied by increased amounts of coal mining. Preheat flash butt welding technology for its high thermal efficiency; good quality of welded joints is widely used in the field of welding. But flash butt welding machine of mining high-intensity ring chain and its control system has been a difficult problem, which equipment mainly relies on imports. Based on this, our laboratory studied a 550KW mining high strength ring chain hydraulic automatic flash chamber in cooperation with Jilin Coal Machinery Manufacturing Co. This paper analyzes and in-depth considers the Siemens 300 as the main controller for mining high-intensity flash control system and control process welder.Preheat flash, continuous flash, upset the mechanism of such processes and control processes of mining high-intensity flash of welding will be elaborated in detail in this thesis, which also involve the analyzes of design principle of main welding power and some secondary power. In this paper, with the control process and mode of PLC, there are detailed and clear descriptions of Mining ring chain flash butt welding machine hydraulic servo system, introduction of several major hydraulic control apparatus, study of the electro-hydraulic servo control process in the control systems, and lists of some key parameters of the electro-hydraulic servo control system. In this paper, for the control of the flash butt welding core movement fixtures, in which the expert PID control method be used to control systematically, and mathematical models be built and simulated at the same time. The control effect of the traditional PID, expert PID and the control result that used expert PID be detailed analyzed.Here PLC controller for the control program be analyzed systematically, in which the way of automatic control process and how to achieve automatic control be discoursed detailed. Each part of the control program is also fairly detailed. And the Siemens touch screen on the shelf equipment for real-time monitoring and control. By touching screen can also clearly see the historical operation records on welding current, welding pressure and servo control processes, etc., which can provide reference to adjust equipment for staff.At the end of article enumerates some of important parameters of the debugging.Practice has proved that, the flash butt welding machine with PLC control, can control the process more precise, while the control system more stable. The equipment has been put into operation, which has a friendly man-machine interface, stable operation in long time. It comprehensively improve the welding quality and welding efficiency of the mining high-strength round chain.