A kind of thin strip continuous casting free looper control method and device

Abstract

The invention discloses a control method and device for a thin-strip continuous casting free loop. The control device comprises a swing guide plate, a drive hydraulic cylinder of the swing guide plate, and a loop height detection device arranged on the outer side under the swing guide plate, wherein a displacement sensor is arranged on the swing guide plate; both the loop height detection device and the displacement sensor are electrically connected with a loop guide controller; the loop guide device is arranged in front of a horizontal conveying roller path and comprises a loop guide roller set with variable curvature and a corresponding drive hydraulic cylinder; a sensor capable of detecting position data of a loop contact point is arranged on the loop guide roller set; and the loop guide controller is electrically connected with a servo valve for driving the hydraulic cylinder. When the parameter such as the thickness, the loop height or the like of a cast strip is changed, the bending radius of the cast strip guide profile of the loop guide device can be adjusted to be greater than the minimal bending radius capable of leading the cast strip to generate cracks so as to guarantee the cast strip to have no cracks and obtain good quality of the cast strip.

Description

technical field [0001] The invention relates to a continuous casting process and equipment, in particular to a thin strip continuous casting free looper control method and device. Background technique [0002] Twin-roll strip continuous casting technology is an advanced short-flow metallurgical process. [0003] Such as figure 1 As shown, the molten steel is directly poured into a molten pool surrounded by two relatively rotating cooling rolls 1a, 1b capable of rapid cooling and side sealing plates 2a, 2b. Cool and solidify, and then form a solidified shell and gradually grow and then be squeezed together at the smallest gap between the two cooling rollers 1a and 1b to form a cast steel strip 4, which is guided by the guide plate 5 to the looper guide roller 12 and the clamp Send roll 6, and form looper 3 between looper guide roll 12 and cooling roll 1a, 1b, and then roll into thin strip by rolling mill 7, and the rolled strip is driven by conveying roller table 8 to under...

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Problems solved by technology

[0018] On the other hand, the increased loop height of the cast strip also results in a bend radius r at the bottom of the loop b becomes smaller, according to formula (4), if the bending radius of the cast strip here is too small, it will also cause cracks in the cast strip

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