Continuously casting disconnecting device

Abstract

The invention provides a continuous casting and cutting device, which can keep the deviation value of the control instruction of the moving speed of the casting strip, that is, the moving speed of the hydraulic device and the moving speed of the hydraulic guillotine shear to the minimum. The control unit (200) of the hydraulic device is provided with a inactive area compensation unit (30) which controls the moving speed control instruction of the hydraulic guillotine shear (13) which is equal to the moving speed of the casting strip (4), and outputs the deviation with the moving speed testing value in the stated delay time. The inactive area compensation unit (30) generates the deviation between the moving speed control instruction SPD-R of the hydraulic guillotine shear (13) which is equal to the moving speed of the casting strip (4) and the moving speed SPD-F of the hydraulic guillotine shear (13) at the comparison part (30). After sending the deviation to the inactive area compensation part (30b), through the ratio control part (30c) which is used for ratio controlling, the compensation unit (30) then outputs to the retardation compensation part (30d) to retardation compensate the change of the output and keeps the un-matching value between the moving speed of the casting strip (4) and the moving speed of the hydraulic guillotine shear (13) to the minimum.

Description

technical field [0001] The present invention relates to a continuous casting cutting device, in particular to a hydraulic cylinder stretching and contracting according to the moving speed of the slab, so that a hydraulic shear directly connected to the hydraulic cylinder moves and cuts the slab, and then A continuous casting cut-off device that resets hydraulic shears. Background technique [0002] As such a conventional device, there is a method of synchronizing the moving speed of a hydraulic shear with the slab take-out speed (pinch roll speed), and cutting the slab continuously supplied from a pot storing molten steel. The following techniques are well known for moving cutting devices to a predetermined length. [0003] That is, a proportional electromagnetic flow control valve, a casting speed detector for detecting the speed of pinch rolls, and a speed control unit are provided in a hydraulic circuit of a shear moving hydraulic cylinder of a hydraulic shear for a cont...

AI Technical Summary

Problems solved by technology

[0005] However, in the continuous casting cutting device driven by the above-mentioned hydraulic device, since the correlation between the moving speed control command of the hydraulic device for moving the hydraulic shear that cuts the slab and the moving speed of the hydraulic shear is nonlinear, Therefore, if the resulting speed deviation is large, there is a problem that it cannot be controlled by the control method of the above-mentioned conventional device, which hinders the normal operation of the cutting function of continuous casting.

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