|
Wire is one important type of iron and steel products, widely used in construction and wire products industry. High speed wire rod production line with high speed rolling, plate material and high yield characteristics, wire production automatic control level rise can reduce the labor intensity of operators, reduce man-made factors on the production of interference, to ensure the production and quality of stability, thus contributing to the development of new products and reduce the cost of production. The first mill of high-speed wire production line in2005October has been put into production, in the process of engineering construction introduces the theory of automatic control, to replace most of the manual operation, and this design in the production of continuous improvement.The main content of this paper includes the following aspects:Firstly, elaborated the high speed wire process production process, technological requirements, based on the high speed wire rod control system is studied in detail, so as to control the system to achieve specific put forward the main control objective, the control objective is divided into the control system of heating furnace, rolling control system and state records of accident of breaking system several components, and the system control target are analyzed.Secondly, expounds the realization of the control system, and the system used in the part of key technology are analyzed. For example, the system using the encoder control billet on, time and distance of step double compensation control of walking beam action accuracy; the looper and the water tank are respectively introduced into the PID algorithm control and centralized control concept.Thirdly, according to the controlled object wide distribution, functional requirements is complex wait for a characteristic, system uses PLC control technology and field bus technology, the hardware design using Siemens S7company’s products, selection of software company Siemens Step7programming software and Wincc configuration software, it illustrates their technical principle, control method and characteristics of application. In software design, to heating furnace automatic control system as an example, gives a detailed control thinking.Finaly, combining with the production practice, discover a problem, put forward the question, come up with solutions, elaborates on the optimization scheme of automatic control system, gives the related optimization program, and illustrates the operation.Generally, In this paper, in the course of the study, in-depth study of the production process, in the process to meet the requirements on the basis of the establishment of the automatic control theory, combined with the production needs improvement, in order to reduce the labor intensity of operating staff, stable quality, improve the yield has provided technical support, and ultimately achieve the research goal, achieved good results.
|