JPH0243572B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a cutting control device for a continuous casting machine.

<Prior art> In order to cut slabs that are continuously cast by a continuous casting machine, a clamper installed in a cutting device clamps the slab and cuts the slab while moving the slab and cutting device in synchronization. Cutting devices have been widely used in the past.

In such a cutting device, it is necessary to accurately grasp the length from the tip of the slab to the cutting point, that is, the point at which the clamper clamps the cutting device to the slab and starts synchronous movement. Therefore, the cutting length accuracy of the slab is determined at the time when the cutting device is clamped to the slab by the clamper.

These clampers have a hydraulic or electrical system time delay from receiving a clamping command to completing actual clamping, and assuming that the casting speed does not fluctuate, the clamping start point is calculated based on the clamper's operation time delay. has been decided.

However, if there is a variation in the casting speed of the slab, only the variation will occur as a cutting length error, resulting in poor cutting length accuracy and a decrease in yield.

<Purpose of the Invention> Therefore, the present invention aims to provide a continuous casting machine with a continuous caster that can be used even when the casting speed is changed depending on the steel type and mold size as an operating condition, or when the moving speed of the slab changes due to some external factor. To provide a cutting control device for a continuous casting machine that can automatically adjust the clamping start point of a cutting device for a slab and improve cutting length accuracy of the slab without causing a cutting length error. be.

<Structure of the Invention> The present invention uses the measurement value of the slab length measuring unit provided in the cutting device and the slab moving speed (casting speed) corrected at each predetermined sampling time to the operation of the clamper. The present invention is characterized in that the clamper is operated in consideration of the required actual time delay, and the cutting device is clamped at the desired cutting position of the slab.

<Example> Hereinafter, a description will be given based on an example of the invention shown in the drawings. The attached drawings show a cutting device in which a traveling blowpipe cutter is arranged on a continuous casting machine.

In this embodiment, the molten steel in the tundish 1 passes through the mold 2 and becomes a continuous slab 11, which moves on a roller table. A measurer roll 4 that rolls into contact with the moving slab 11 is provided at a predetermined position on this roller table, and a synchro transmitter 8 is mechanically connected to the measurer roll 4.
is converted into an electrical signal.

Further, on the downstream side of the measure roll 4 of the roller table, a torch car 5 is arranged so as to be able to reciprocate further downstream from a predetermined position downstream of the measure roll 4 as a reference. The torch car 5 has a blowpipe drive unit 6 that cuts the slab 11, and a clamper 7 that clamps the slab 11 and allows the torch car 5 to move in synchronization with the slab 11. The clamper 7 is driven by a hydraulic or electrical system, and is controlled together with the blowpipe drive section 6 by a controller 10, which will be described later.

The torch car 5 also has a built-in measure roll (not shown) that rolls into contact with the slab 11 and measures the length of the slab 11 from the tip of the slab 11 to the torch car 5, and a mechanically connected synchronizer roll. The transmitter 9 converts it into an electrical signal.

This cutting control device also includes a controller 10, to which electric signals from synchro transmitters 8 and 9 are respectively input. Further, the controller 10 has a clamp time setting that sets an actual time delay, which is the operating time of the hydraulic system or electric system from when the clamper 7 provided in the torch car 5 starts operating until it completes clamping on the slab 11. device 12 is connected.

The controller 10 reads the signal from the synchro transmitter 8 connected to the measure roll 4 at every predetermined sampling time, corrects (increments) the moving speed of the slab 11, and always calculates the latest slab moving speed. Further, the controller 10 inputs the signal from the synchro transmitter 9 and calculates the length of the slab 11 from the tip of the slab 11 to the blowpipe drive section 6 provided on the torch car 5. The controller 10 compares and calculates the cutting length of the slab 11 which is set separately with the synchro transmitters 8 and 9 and the clamp time setting device 12, and outputs an activation signal to the blowpipe drive unit 6 to cut the slab 11. It can be cut.

<Operation> The operation of this cutting control device will be explained step by step below.

A clamp time delay specific to the clamper 7 is set in advance in the clamp time setter 12. Slab 1
1 moves on the roller table, the measure roll 4 rolls into contact with the slab 11, and a speed signal of the slab 11 is input from the synchro transmitter 8 to the controller 10.

Further, when the slab 11 reaches the torch car 5, a built-in measure roll starts measuring the length of the slab 11, and a length measurement signal is input from the synchro transmitter 9 to the controller 10.

Here, the desired cutting length; l Current slab length; l' Slab speed; v Clamping time; 10 outputs an operating signal to the clamper 7 of the torch car 5 to clamp the torch car 5 to the slab 11 and move the torch car 5 in synchronization with the slab 11. Next, the controller 10 operates the blowpipe drive unit 6 to cut the slab 11. After cutting, the controller 10 releases the clamp of the clamper 7 and returns the torch car 5 to its initial position.

<Effects of the Invention> The cutting control device for a continuous casting machine according to the present invention is as described above, and can provide the following effects.

During continuous casting slab cutting work, the clamp start point is automatically adjusted according to the current moving speed of the slab, so even if the slab speed changes due to operating conditions or other external factors, The cutting device can be clamped at the desired (desired) cutting position of the slab, cutting can be performed without cutting length errors, and the yield is improved.

[Brief explanation of drawings]

The drawings are schematic illustrations of embodiments of the invention. 1...Tandatetsuyu, 2...Mold, 3...
...Pinch roll, 4...Measure roll, 5...
Torch car, 6... blowpipe drive unit, 7... clamper, 8, 9... synchro transmitter, 10... controller, 11... slab, 12... clamp time setting device.

Claims (1)

[Claims] 1. A clamper that clamps a cutting device to a moving slab and moves it in sync with the moving slab;
A cutting device for a continuous casting machine equipped with a cutting device for cutting a slab into a predetermined length includes: a slab speed detection unit installed in a slab moving path to detect the moving speed of the slab; a length measuring unit that measures the moving distance of the movable slab relative to the cutting device; and a clamp time setting device that sets a time delay from the start of the clamping operation of the slab to the completion of clamping of the clamper provided in the cutting device. , Taking into account the speed read value at each predetermined sampling time from the slab speed detection section, the slab length measurement value from the length measuring section, and the clamp time delay from the clamp time setting device, send a clamp start signal to the cutting device. A cutting control device for a continuous casting machine, comprising: a control circuit configured to output.