Analysis Of The Tension Control Of New CGL In Cold Rolling Mill Plant Of Baosteel

With the development of Chinese economy, cars have been the common tools in people's life. Especially in recent years, the requirement of cars is becoming more and more. With the development of Chinese automobile industry, the requirement for car plates is becoming more and more. At the same time, the demand for the quality of car plate's surface is becoming higher. As we know, the main quality problem of car plate's surface is scratch. The main factor affecting car plate's surface is the tension control of CGL. This paper focus on the tension control of CGL, has made researches around the key issue as follows:1. The paper makes research around the tension control of CGL, including the setting system and the close loop control of tension control, etc. The paper shows that the line's tension is established by the speed and output torque of every section's motors, and analyses the reference model of motor speed in CGL process section.2. The paper analyses the reason of unstable tension, introduces the reference model following control, a new method used in the tension control of CGL, analyses the control principle and effect of reference model following control in detail using MATLAB, and compares it with the actual data and curve of equipment tuning, summarizes the advantages about the application of reference model following control, provides the main points of tuning.3. The paper analyses the principle of load balance control used in bridle rolls, introduces the new mode about load balance control, and compare the difference among these control modes. The paper made an analysis and calculation about the output torque of the motor of bridle roll in detail.4. The main character in the new CGL is dancer roll, the new equipment designed for furnace. The paper introduces the tension and position control system of dancer roll in detail, analyses the actual effect in application.