Band tail slitting and locating control method

Abstract

The invention discloses a band tail slitting and locating control method. Band tails are continuously conveyed through a shear front pinch roll, and a slitting shear is controlled to continuously shear the band tails according to the set band tail cutoff length S0; in the shearing process, when it is detected that the length of the residual band tail reaches the set band tail waste initial lengthL0, the conveying length L1 of the band tails is started to be obtained, and the residual length L2 of the band tails and the residual shearing frequency N are calculated; when the residual shearing frequency N is smaller than or equal to n, the cutoff length of the band tails is pre-controlled and adjusted, and the slitting shear shears the band tails according to the adjusted band tail cutoff length; and when the residual shearing frequency N is calculated to be equal to 0, or it is detected that no band steel passes through the shear front pinch roll, the shear front pinch roll is opened, and band tail slitting is completed. According to the band tail slitting and locating control method, the occurrence rate of steel remaining or steel jamming accidents during tail crushing can be effectively reduced, the safety risk of manual treatment to steel jamming / steel remaining is reduced, and the situation that equipment is damaged when the slitting shear shears dual-layer band steel is avoided.

Description

technical field [0001] The application belongs to the technical field of automatic control, and in particular relates to a strip tail slitting positioning control method applied to the control of the length of cut waste when slitting and cutting the shredded tail in a cold-rolled strip processing line. Background technique [0002] When the tail of the strip on the uncoiler of the cold rolling processing line is flicked to the slitting and shearing, in order to improve the yield, it will continue to move forward for a certain distance according to the plate shape before slitting. Cut into shreds, and the shredded tails fall into the waste chute. [0003] When the slitter cuts the tail, the last strip is sometimes long and sometimes short. If the length of the last strip is too long and exceeds the width of the waste chute, the last strip will be stuck between the shear blade and the waste chute and cannot fall down; If the last piece of strip is too short, the strip will re...

AI Technical Summary

Problems solved by technology

[0003] When the slitter cuts the tail, the last piece of steel strip is sometimes long and sometimes short. If the length of the last piece of steel strip is too long and exceeds the width of the waste chute, the last piece of steel strip will be stuck between the shear blade and the waste chute and cannot fall down; If the last piece of strip is too short, the strip will remain on the platform between the slitter and the pinch roll after it leaves the pre-shear pinch roll, causing the slitter to shear when cutting the next roll of strip. Double layer, bad effect on equipment

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