KR20000041633A - System for measuring cutting length of slab - Google Patents

Abstract

PURPOSE: A system for measuring cutting length of a slab is provided to measure cutting length by a non-contact method when cutting a slab about 10m to about 3m using gas before transferring a slab produced in a continuous molding line to a rear plate producing factory to be produced in a rear plate. CONSTITUTION: A laser measuring the length of a slab by a non-contact method is installed on one side of an outlet part of a cutter(1) whereon slabs(S) are transferred continuously. The laser is placed on a support stand having a rotary driving part chasing a path of which the central point of the slab is moved by the displacement of the rotational angle according to the transfer of the slabs. A photo-sensor sensing the non-outlet of the slabs and the inlet of the slabs is installed in the point where the cutter passes. The laser and the rotary driving part are connected to a controller collecting and comparing data measured by respective photo-sensor and transmitting a control signal while displaying the data on a monitor. The controller is composed of a cutter controlling PLC(programmable logic controller), a computer, and a multi channel communication device transmitting and receiving data. Herein, error in measurement and pause due to frequent disorder are reduced and productivity is improved.

Description

Cutting length measuring system of slabs

According to the present invention, the slab having a length of about 10M is divided into three parts according to the order of the thick plate factory before the transfer to the thick plate factory in order to make the slab produced in the continuous casting facility. The present invention relates to a cutting length measuring system of a slab in which the cutting length can be measured in a non-contact manner when cutting into a gas.

In general, a slab with a length of about 10M is transferred to about 3M according to the order of the heavy plate factory before the slab (thickness 220 ~ 250m) produced in the continuous casting equipment is transferred to the heavy plate factory to make the plate (5 ~ 10mm thick). The gas was cut into three portions.

1A to 1C are side, plan, and cross-sectional views of a conventional cutting device, in order to cut the length of the slab in order to measure the cutting length of the slab (S) a plurality of drive rolls 2 ( 2 ') is put on the cutter 1 by driving the driving roll in the state put on the top of the slab, the pneumatic cylinder (4) is operated when the slab enters the rotary plate (3) with the encoder attached to the slab (S) As it comes in contact with the side, the angle of rotation of the rotating plate 3 was converted to the length in the encoder to measure the length of the slab and cut it.

The first cut slab is first drawn out by the operation of the driving roll 2 'located on the opposite side of the inlet side of the cutter 1, and drives the driving roll 2 to insert the remaining slabs for the next cutting. Subsequently, the second and third slabs cut to a certain length are obtained by repeating the same method as the above method.

However, the prior art as described above, the malfunction of the pneumatic cylinder (4) frequently occurs due to the temperature decrease in winter, the length measurement is inaccurate, and there is a problem that the productivity is reduced by the media generated from the back plate factory.

On the other hand, when a failure occurs in the facility, the operator climbs directly on the slab, measures it with chalk, marks it with chalk, and checks the scale line using a CCTV monitor, and then operates the driving roll to manually adjust the cutting line.

However, the method of measuring the length of cut by hand was not possible in the case of hot hot rolled slab, so a non-contact measuring device was urgently needed.

The present invention has been made in view of the various problems according to the conventional slab cut length measurement as described above, the object is to provide a slab cut length measurement system that can measure the cut length in a state that is not in contact with the slab. .

In order to achieve the above object, the present invention is provided with a laser measuring the length of the slab in a non-contact state on the exit side of the cutter in which the slab S is continuously transferred, but the laser rotates at an angle of rotation according to the feeding of the slab. While being mounted on the support having a rotary drive for tracking the path of the slab's center point is moved, the photo sensor for detecting the entrance of the slab (S) is installed on the entry side of the cutter, and whether the slab is discharged at the passing point of the cutter And a photo sensor for detecting the entrance of the slab and the slab at the same time, the laser and its rotary drive unit 21 are connected to a controller that sends control signals while collecting and comparing the data measured through the photosensor on the monitor, This controller is connected to computer and multi-channel communication device to send / receive data with cutter control PLC. , Characterized as the Sikkim, increase productivity by reducing the measurement error, and equipment down time due to frequent breakdown of the contact length measuring apparatus according to the configuration.

Figure 1a to 1c is a side and plane and cross-sectional view of a conventional cutting equipment,

Figure 2a to 2c is a plan view showing the operating state of the measuring length system of the present invention, Figure 3 is a state diagram of the laser applied to the system,

4 is a block diagram of a control unit of the measurement system of the present invention;

5 is an operation conceptual diagram of a laser rotating drive unit to which the measuring system of the present invention is applied;

6 is an algorithm for processing the measurement length of the present invention.

<Description of the symbols for the main parts of the drawings>

1: Cutter 2, 2 ': Driven roll

3: rotating plate 4: pneumatic cylinder

10 laser 20 support

21: rotating drive part 30, 30 ', 40, 40': photosensor

50: controller

Hereinafter, the slab cutting length measuring system of the present invention will be described with reference to the accompanying drawings.

Figure 2a to 2c is a plan view showing the operating state of the measuring length system of the present invention, Figure 3 is a diagram showing the installation state of the laser applied to the system, the slab (S) is cut by the set length in the process of continuous transfer The laser 10 for measuring the length of the slab in the non-contact state is installed on the exit side of the cutter (1), the laser 10 tracks the path in which the center point of the slab moves as the rotation angle is displaced according to the transport of the slab. It is attached to the support 20 provided with the rotary drive part 21.

On the entry side of the cutter 1 opposite to the position of the laser 10, photosensors 30 and 30 ′ are installed to detect the entrance of the slab S, but the slab is discharged at the passing point of the cutter 1. The photosensors 40 and 40 'are simultaneously installed to detect whether or not the slab enters.

4 is a block diagram of a control unit of the measuring system of the present invention, wherein the laser 10 and its rotary drive unit 21 are provided through respective photosensors 30, 30 ', 40 and 40'. It is connected to a controller 50 which sends a control signal while collecting and comparing the measured data and displaying it on a monitor. The controller is connected to a computer and a multichannel communication device that transmits and receives data to and from a cutter control PLC.

Therefore, when the entrance of the slab is detected by the entry side photosensors 30 and 30 ', the cutting length indication received from the cutter control PLC appears on the computer monitor of the controller 50, and the laser 10 at the initial measurement position is displayed. ) And at the same time receives the initial position confirmation signal from the rotary drive unit (21).

Subsequently, when the entrance of the slab S is detected by the photosensors 40 and 40 'of the passing side of the cutter 1, the rotary drive unit 21 of the laser 10, which initially sets the measuring point at the center position of the slab, is detected. The measurement starts while rotating the slab to track the slab movement, displaying the data measured by the laser on the monitor and simultaneously transmitting the measurement results to the controller of the cutter 1.

The cutter control PLC controls the speed of the drive roll for feeding the slab and stops the drive roll when the indicated cutting length is reached, and the performance value is displayed on the computer monitor.

After the cutting operation, the driving roll installed on the passing side of the cutter is operated to discharge the first slab initially cut, and when the photosensors 40 and 40 'installed on the passing side of the cutter are turned off, the laser rotating driver Place (21) in the initial position.

The second slab is cut by the continuous operation as described above, and after the cutting is completed, all remaining third slabs are dispensed.

FIG. 5 is a configuration diagram illustrating an operation concept of a laser rotating driver to which the measuring system of the present invention is applied. The rotating driving unit 21 is configured to displace the angle of the laser 10 along the measuring point set at its center point when the slab is moved. While tracking the slab's movement position.

That is, the initial position of the laser measuring device for measuring the length is θ1 is determined by the predetermined length L1 and D1, and the rotation angle received from the rotation driving unit is converted into the cutting length L2 to be transmitted to the cutter control PLC, 6 is a processing algorithm of the present invention for processing the measurement length.

According to the algorithm, when the slab is detected in the state in which the cutting length is input to the controller 50, the laser 10 is driven to start the measurement and transmit the measurement data, and the cutter 1 of the slab When the cutting is completed, the laser is sent to the initial position to cut the second slab.

The slab cutting length measuring system of the present invention prevents malfunction and incorrect length measurement of the pneumatic cylinder that drives the sensing device due to air freezing in the winter, thereby reducing productivity due to the generation of media back from the thick plate factory. There is an effect that can prevent the inconvenience of manual work.

In particular, there is an advantage in that the productivity can be improved by significantly reducing the downtime due to measurement errors and frequent failures and manual measurements caused by contacting the slab to measure its length.

Claims (1)

In that the cutter is installed to cut by the set length in the process of the slab (S) is continuously conveyed, The laser 10 for measuring the length of the slab in a non-contact state is installed on the exit side of the cutter 1, the laser 10 is a path in which the center point of the slab is moved while the rotation angle is displaced according to the transport of the slab. Mounted on a support 20 with a rotary drive 21 to track, On the entry side of the cutter 1 opposite to the position of the laser 10, photosensors 30 and 30 'are provided to detect the entrance of the slab S, and the slab is discharged at the passing point of the cutter 1. Photosensors 40, 40 'are installed to detect whether the entrance of the slab at the same time, The laser 10 and the rotation driving unit 21 collect and compare the data measured through the photosensors 30, 30 ', 40 and 40', respectively, and display a control signal while sending a control signal to the monitor 50. Is connected to the cutting machine control PLC and the computer and the multi-channel communication device for transmitting and receiving data with the cutting machine control PLC.