Control method for avoiding S roller slippage of single-stand cold-rolling strip steel smoothing machine

Abstract

The invention provides a control method for avoiding the S roller slippage of a single-stand cold-rolling strip steel smoothing machine, and belongs to the technical field of metallurgical automation.A torque control mode and a speed control mode are switched for the S roller control mode according to the difference of the thicknesses of the strip steel to be smoothed, so that an S roller does not slip. According to the torque control mode, a speed of being ahead of the strip steel is given to the S roller at an outlet, or a speed of lagging behind the strip steel is given to the S roller atan inlet, and then the tension amplitude limiting is carried out on the S roller torque, so that the S roller works in the torque closed loop; and according to the speed control mode, the actual measured strip steel speed is used as the S roller given speed, and meanwhile, the relatively small amplitude limiting is carried out on the S roller torque, so that when the strip steel with the relatively thin thickness is smoothened, the S roller does not slip. The control method can satisfy the large tension required for smoothing the thick strip steel, and can also avoid the problem of the S roller slippage when the thin strip steel is smoothed.

Description

technical field [0001] The invention relates to the technical field of metallurgical automation, in particular to a control method for avoiding slipping of S rolls of a single-stand cold-rolled strip tempering machine. Background technique [0002] The tempering process is a process after the cold-rolled strip is annealed. Its purpose is to eliminate the yield plateau of the material, improve the surface roughness of the strip, and correct the shape of the strip. Therefore, the quality control of the tempering process will directly affect the quality of the product. Effect. [0003] Quality control of temper mill mainly includes elongation control, tension control, plate shape control and surface quality control. According to the process requirements, the cold rolling and tempering unit needs to establish a large front and rear tension. In order to avoid the heavy equipment of the uncoiler and coiler, S rollers are equipped at the front and rear of the tempering machine to ...

AI Technical Summary

Problems solved by technology

[0005] In the process of industrial production, the general way to avoid S-roller slippage is to increase the surface roughness of S-roller to ensure sufficient friction to prevent it from slipping. The surface roughness of the S roller will gradually decrease, and the slippage probability of the S roller will gradually increase. This method has high cost, short roll changing cycle, poor feasibility, and cannot completely solve the slippage problem.

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