A parameter control method for the initial section of a six-roller cold rolling skin pass mill with continuous annealing

Abstract

The present invention relates to a parameter control method for the initial stage of a six-roller cold-rolled skin pass mill, which specifically includes the following steps: step 1, monitoring and correcting the tracking data of the production line; When the machine is complete, reduce the strip speed to 60m / min. When the weld position is 0.5 meters away from the tempering machine, the speed adjustment is completed and the speed is kept at 60m / min to enter the tempering machine. Step 3, when the speed is reduced to 60m / min , reduce the tempering rolling force to 1100-1300KN, avoid the excessive impact force of the weld seam on the tempering machine work roll to cause roll marks defects, and ensure that the strip passes through the tempering machine stably; step 4, pass the leveling at the head of the strip Calculate the rolling force, tension and other leveling setting parameters at the position 0.5m behind the machine, and increase the strip traveling speed to 200m / min; step 5, adjust the rolling force and leveling tension to the target value according to the strip information, shorten The adjustment time of the rolling force and tension after the seam position is shortened, the strip tension and rolling force fluctuations during the elongation closed-loop control are reduced, and the yield of the strip is improved.

Description

technical field [0001] The invention relates to the field of production parameter control of cold-rolled strip steel, in particular to a parameter control method for the initial section of a continuous-rolling six-roller cold-rolled tempering mill. Background technique [0002] In the process of cold rolling and continuous annealing, the junction of two strips, that is, the vicinity of the welding seam, is the key position of leveling control. The main control parameters of the tempering process are the tempering rolling force and the tension before and after the tempering. Therefore, the control of the elongation of the tempering machine is mainly determined by the tempering rolling force and the tension before and after the tempering. The rolling force of the tempering machine is the control of the tempering machine. A key factor in elongation accuracy. The determination of its elongation process parameters determines the final performance of its strip steel products. If...

AI Technical Summary

Problems solved by technology

[0005] In the current production process, as mentioned in the above patent, the technology of adjusting the rolling force according to the target elongation is relatively mature. The existing problems mainly focus on the initial process setting of the welding seam position at the tempering machine position. The so-called initial The process is mainly the front and rear tension and rolling force parameters of the temper mill. The tempering rolling force needs to be coordinated with the tempering tension. When the initial parameter of the rolling force is too low or too high, the time to adjust to the target elongation will increase significantly. This leads to a long distance at the head of the steel coil that cannot meet the product quality requirements, increases the length of the head cut, and reduces the yield of the unit

Therefore, it is necessary to solve the problem of inaccurate initial process parameter setting of the tempering machine

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