The Alteration Of Electric Control System And The Research Of Loop Control System For High Speed Wire-rolling Mill

With the social development and progress in science and technology, wire rod mill has the trend which is high-speed, continuous, non-twisting, and has single line, the combination drive, mechanization and automation. A higher requirement of quality, variety, performance of steel products is born. The rolling process control faces a new challenge. Since Reform and Opening Up, China's wire rod production is first in the world for several years. However, China's high-speed wire rod mill is a very small proportion of the majority of the production line and it is still in backward state of production, has low production efficiency. The system must be modified as soon as possible. Hot Rolling loop control system is a multi-variable, and the strong coupling system. The traditional way to control the height and tension has been unable to meet the requirements of rolling performance. The use of advanced computer technology improves the loop control system, improves the monitoring of wire rod production, operation, and improves the level of automation. The production efficiency and product quality is increased. It has great significance. This article is based on the actual development situation of China's high-speed wire electric control system, the following work is done:Firstly, in this paper, the high-speed wire electric control system, high-speed wire rod production process, performance requirements and the status of the development of high-speed wire loop control system at home and abroad were introduced.After that, by analyzing ease of use, advanced and speed of products of the world famous PLC manufacturer and combining the existing technology, equipment condition, the system transformation program is proposed and implemented.Then, the important port of high-speed wire rod production line electric control system, loop control system theory is analyzed detailedly. This part includes:the basic ideas of loop control, basic working principle, the measurement of loop, as well as the main control means of loop, and so on. The basis equation of loop system and the formula of tension is derived.Finally, the key port of high-speed wire rod production line electric control system, loop control system is studied deeply. The starting off control of loop; a high degree control of loop; tension control of loop, as well as the protection control of the accident are included. And the working principle of the mainstream products of the current high-speed wire loop control--T400 of Siemens is analyzed. And the loop control system is transform successfully. At present, the debugging work has been finished, the equipments run normally, and design is implemented perfectly.