Parameter control method for initial segment of continuous annealing six-roll cold rolling temper mill

Abstract

The invention relates to a parameter control method for an initial segment of a continuous annealing six-roll cold rolling temper mill. The parameter control method specifically comprises the following steps: S1, monitoring and correcting production line tracking data; S2, when the position of a weld joint of a new roll of strip steel is close to the temper mill, reducing the speed of the strip steel to 60 m/min, and when the position of the weld joint is 0.5 m from the temper mill, finishing speed regulation and feeding the strip steel into the temper roll at a speed of 60 m/min; S3, when thespeed is reduced to 60 m/min, reducing the rolling force of the temper mill to 1100-1300 KN to avoid the condition of a roll mark defect as the impact force of the weld joint to a working roll of thetemper mill is too large, wherein the strip steel passes the temper mill stably; S4, after the head of the strip steel passes the position 0.5 m from the temper mill, calculating leveling set parameter such as rolling force and tensile force, and increasing the advancing speed of the strip steel to 200 m/min; and S5, correspondingly adjusting the rolling force and the leveling tensile force to target values according to strip steel information, shortening the adjusting times of the rolling force and the tensile force passing the position of the weld joint, and reducing fluctuation of the tensile force and the rolling force in closed-loop control of ductility, wherein the yield of the strip steel 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...

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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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