KR20060075629A - Torch cutting machine with torch cutting speed controlled and cutting method using the same - Google Patents

Abstract

The present invention relates to a torch cutting device, that is, TSI (TORCH CUTTING MACHINE) and a method for cutting a cast using the same. The torch cutting device of the present invention includes at least one torch moving in the cutting direction of the slab to cut the slab, a temperature sensor unit measuring the surface temperature of the slab to be cut, and the surface temperature of the measured slab based on the And a controller for controlling the speed of movement of the torch.

Cast, transfer guide, torch, temperature sensor unit, torch cutting device

Description

TORCH CUTTING MACHINE WITH TORCH CUTTING SPEED CONTROLLED AND CUTTING METHOD USING THE SAME}

1 is a front view of a torch cutting device according to the prior art;

2 is a perspective view of a torch cutting device according to the present invention;

3 is a mounting view of the temperature sensor unit for measuring the temperature of the torch cutting device according to the present invention.

4 is an exploded perspective view of a temperature sensor unit for torch temperature measurement according to the present invention;

5 is a cutting process diagram of the torch cutting device according to the present invention.

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

1: torch cutting device

12: transfer guide

13a, 13b: first and second torch

14a, 14b: torch filler

15: cast

16: temperature sensor unit                 

16a: temperature sensor

16b: sensor body

17a, 17b: first and second support plates

The present invention relates to a torch cutting device, that is, TIMM (TCM, TORCH CUTTING MACHINE) and a method for cutting a cast using the same, in particular the cutting of the torch in the cutting equipment for cutting a high temperature cast produced by a continuous casting machine to a predetermined length It relates to a torch cutting device and a cast cutting method using the same to automatically control the cutting control speed to maximize the capacity

In general, cast steel cast through a continuous casting machine is cut to the appropriate length to meet the needs of the consumer. The conventional torch cutting device 1 includes a transfer guide 2 and two cutting torches 3a and 3b mounted horizontally on the transfer guide. The torch cutting device 1 performs the cutting operation while the first and second torches 3a and 3b move from the edge of the slab 5 toward the center portion.

The cutting operation is performed while the operator of the torch cutting device 1 visually observes the surface temperature of the cast piece 5 drawn out, while manually controlling the torch cutting speed. For this reason, it is difficult for an operator to visually check the surface temperature of the continuously cast steel 5, and if the surface of the cast 5 is not cut when the surface of the cast 5 is overcooled. This manual cutting operation is a situation in which the drawing speed of the continuous casting machine is reduced or the casting operation is interrupted, and the cutting speed of the cast slab by the torch is lowered, so that the gas (GAS) waste is increased.

An object of the present invention is to solve the above-mentioned problems of the prior art, a torch cutting device for cutting a high-temperature slab produced by a continuous casting machine to a predetermined length, the cutting speed at which the torch can cut the slab perfectly It is to provide a torch cutting device and a cast cutting method using the same is automatically controlled.

Another object of the present invention is to maximize the cutting ability of the torch and the convenience of the cutting operation to prevent the case of non-cutting the slab, reduce the gas (GAS) consumption by the appropriate torch cutting, emergency cutting operation case by improving the slab cutting capacity It is to provide a torch cutting device and a cast cutting method using the same that can prevent the.

Torch cutting device of the present invention for achieving the above object is at least one torch moving in the cutting direction of the slab to cut the slab, a temperature sensor unit for measuring the surface temperature of the cut slab, and the measured And a controller for controlling the speed of movement of the torch based on the comfort surface temperature.

The temperature sensor unit includes a temperature sensor for measuring the surface temperature of the cast steel, and a sensor main body in which the temperature sensor is embedded and cooling the temperature sensor, and a translucent member is installed on the front surface of the sensor main body. It includes a tube tube disposed around the temperature sensor, the cooling water may flow through the tube tube.

The sensor body may further include a tube tube disposed around the temperature sensor, and cooling air may flow through the tube tube.

The temperature sensor unit may be mounted on at least one torch.

An insulation may be interposed between the temperature sensor unit and the torch.

In order to achieve the above object, the present invention provides a method for cutting a cast steel, the method comprising the steps of measuring the surface temperature of the slab to be cut, and the torch moving speed control step of increasing or decreasing the moving speed of the torch according to the increase or decrease of the measured surface temperature Include.

The torch movement speed control step measures the torch movement speed by 100 mm / min when the measured slab surface temperature is 300 degrees C or less, and the torch movement speed by 150 mm / min when the measured slab surface temperature is 300 to 400 degrees Celsius. If the surface temperature of the specimen is 400 to 500 degrees Celsius, the torch movement speed is 200 mm / min. If the surface temperature of the measured slab is 500 to 600 degrees Celsius, the torch movement speed is 250 mm / min, and the surface temperature of the measured slab is 600 to 700 degrees Celsius. When the torch movement speed is 300mm / min, and the measured temperature of the cast slab is 700 degrees Celsius or more, the torch movement speed can be controlled to 350mm / min.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

2 is a perspective view of a torch cutting device according to the present invention. Referring to FIG. 2, the torch cutting device according to the present invention includes a transfer guide 12 extending in a horizontal direction perpendicular to the moving direction of the cast piece 15, and slidably mounted left and right on the front surface of the transfer guide. First and second torches 13a and 13b and torch pillars 14a and 14b mounted to the left and right rear ends of the torch.

When the cast piece 15 is moved and supplied so that a position to be cut of the cast piece 15 comes on the connection lines of the first and second torches 13a and 13b, the cast piece 15 stops, and the first and second torches 13a and 13b move horizontally toward the cast piece 15, i.e., in a direction approaching each other. During the movement, when the torch fillers 14a and 14b mounted on the left and right rear ends of the torch 13a and 13b come into contact with the left and right sides of the cast steel, cutting is started to move the cutting work while moving from the edge of the cast steel 15 toward the center. Perform.

The temperature sensor unit 16 is attached to the front surface of the first torch 13a among the first and second torches 13a and 13b. The temperature sensor unit 16 includes a temperature sensor 16a for measuring the surface temperature of the cast steel, and a sensor main body for embedding the temperature sensor 16a and protecting the temperature sensor 16a from the radiant heat of the cast steel 15 ( 16b), which will be described later. However, as the temperature sensor, as a non-contact thermometer measuring a temperature without contacting an object to be measured, a radiation (radiation) thermometer, an infrared thermometer, or the like may be used. Radiation (radiation) thermometers use thermal radiation (radiation) generated on the surface of the object to be measured. There are two types of non-contact, monochromatic wavelength radiation and two wavelength radiation. It is widely used in steel and ceramics. An infrared thermometer measures the temperature of an object by measuring the infrared energy emitted by the object. The thermometer applicable to the present invention is not limited thereto, and any non-contact thermometer capable of measuring a temperature of 0 to 1000 degrees Celsius may be used.

At this time, the surface temperature of the slab 15 cut by the temperature sensor unit 16 attached to the front surface of the first torch 13a is measured, and the torch (not shown) is controlled by the controller (not shown) based on the measured temperature. The moving speed of 13a, 13b) is controlled. The movement speed of the torch 13a, 13b controlled in this way is mentioned later.

3 is a mounting view showing a configuration in which the temperature sensor unit for measuring the temperature of the cast steel in the torch cutting device according to the present invention is mounted on the front surface of the first torch 13a. As shown in FIG. 3, a temperature sensor unit 16 is attached to the front surface of the first torch 13a of the torch cutting device. That is, the first and second supporting plates 17a and 17b are mounted on the torch base plate 13a, which is the front surface of the first torch 13a, for mounting the temperature sensor unit 16. When the first and second support plates 17a and 17b are coupled to each other, a predetermined seating space is formed therebetween so that the temperature sensor unit 16 is seated in the seating space. The first and second support plates 17a and 17b are fixed on the torch base plate 13a which is the front surface of the first torch 13a by the fixing bolt path 17c and the washer 17d.

At least a first support plate 17a of the first and second support plates 17a and 17b may be formed of a heat insulating material, or a heat insulating material may be interposed between the first torch 13a and the first support plate 17a. The heat generated can be prevented from being transferred to the temperature sensor unit.

Although the temperature sensor unit is mounted only to the first torch 13a in FIG. 3, the temperature sensor unit may be mounted to both the first and second torches 13a and 13b. It can also be mounted on a member other than a torch and moved at the same speed as the torch. In this case, the temperature sensor unit may not receive heat directly from the torch.

FIG. 4 is an exploded perspective view of the temperature sensor unit for torch temperature measurement according to the present invention, in which the temperature sensor unit shown vertically in FIG. 3 is shown horizontally. The temperature sensor unit 16 according to the invention is configured to protect the temperature sensor 16a measuring the surface temperature of the cast piece 15 from the radiant heat of the cast piece.

As shown in FIG. 4, the temperature sensor unit 16 includes a temperature sensor 16a for measuring the surface temperature of the cast steel, and the temperature sensor 16a is built in, and the temperature sensor 16a is mounted on the cast steel 15. A sensor body 16b for protecting from radiant heat.

The sensor main body 16b is a hollow cylindrical shape, in which a temperature sensor 16a and a tension adjustment spring 18e are sequentially inserted through the rear surface, and then a fixing cover 18f is fixed to the rear surface by a fastening bolt 18i. The front surface of the sensor body 16b is provided with a translucent member such as transparent glass 18g for protecting the front portion of the temperature sensor 16a, and the transparent glass 18g is fastened to fasten it with the front fixing cover 18h. It is fixed by the bolt 18i.

The sensor main body 16b is built so that a double tube tube is arranged around the temperature sensor 16a, that is, one end of the first tube tube is connected to the other end of the coolant inlet hose 18a for supply of the coolant and the other end thereof. After the introduced coolant cools the temperature sensor 16a, a drain hose 18b for discharging the heat exchanged coolant is connected. In addition, the second tube tube is for cooling the temperature sensor 16a inserted into the sensor main body 16b with air, and an air cooler 19a is connected at one end to supply cooling air into the sensor main body 16b. The other end of the second tube tube is provided with a vent valve 19b for discharging the heated air by heat exchange while cooling the temperature sensor 16a through the one end. At this time, the inlet hose 18a, the drain hose 18b, the air cooler 19a, and the vent valve 19b connected to one end and the other end of the first and second tube tubes are connected through the union 18b, respectively.

In this way, since the temperature sensor 16a is cooled in a double manner, sufficient cooling is achieved and a long cutting operation is possible.

5 is a process chart for controlling the cutting speed of the cast steel of the torch cutting device according to the present invention, deriving and establishing the optimum moving speed of the torch according to the surface temperature of the cast steel. That is, FIG. 5 is a process chart for transferring the surface temperature of the slab 15 continuously measured by the temperature sensor unit 16 to PROGRAMABLE LOGIC CONTROL (PLC), and obtaining an optimum cutting operation by the transmitted values. to be.

First, the relationship between the surface temperature of the cast piece 15 and the moving speed of the torch 13a, 13b will be described. When the surface temperature of the cast steel increases, the cutting of the cast steel becomes easy, so the cutting speed of the cast steel is preferably increased.

The optimum feed rate of the torch, i.e., the cutting speed of the cast steel, according to the surface temperature of the cast steel 15 was obtained as follows through several tests.

Table 1. Optimum Cast Cutting Speeds Depending on Cast Surface Temperature

Referring to Table 1, the cutting of the slab 15 by the torch 13a, 13b of the torch cutting device 11 is performed by the filler 14a of the torch cutting device 11 on the left and right sides of the slab, which is the initial slab cross section, as described above. , 14b) is brought into contact and the cutting starts. In the initial stage of cutting, the slab 15 is cut while the torch 13a, 13b moves at a basic speed of 100 mm / min (100 millimeters per minute), and the surface temperature of the slab measured by the temperature sensor unit 16 is 300 degrees Celsius. Is reached, then the moving speed of the torch is automatically controlled according to the flowchart shown in FIG. That is, the temperature sensor unit 16 continuously detects the surface temperature of the cast steel when cutting the cast steel 15, and if the surface temperature of the cast steel is in the range shown in Table 1 above, the moving speed of the torch is automatically adjusted at a speed corresponding thereto. To control.

On the other hand, the torch cutting device 11 of the present invention is provided with a selection lever in the controller for manually or automatically switching the movement of the torch 13a, 13b in the cutting operation of the cast piece 15, thereby automatically or manually moving the torch. You can choose to drive.

The torch cutting device of the present invention by the above-described configuration provides the following effects. First, the cutting speed of the cast steel is optimally controlled by automatically controlling the moving speed of the torch during cutting of the cast steel, contributing to the maximization of cutting performance of the torch cutting device. In addition, the prevention of uncut cases can be eliminated due to the manual manual cutting work by personnel, and contributes to productivity improvement due to the stability and convenience of the cutting work. Moreover, since the cutting of the cast steel is automatically controlled according to the surface temperature, the amount of cutting gas used is reduced, which can contribute to the reduction of production cost.

Claims (7)

In the torch cutting device, At least one torch moving in the cutting direction of the slab to cut the slab; A temperature sensor unit for measuring the surface temperature of the slab to be cut, And a controller for controlling the moving speed of the torch based on the measured surface temperature of the slab. The temperature sensor unit of claim 1, wherein the temperature sensor unit includes a temperature sensor for measuring the surface temperature of the cast steel, and a sensor body in which the temperature sensor is embedded and cools the temperature sensor. A translucent member is installed on the front surface of the sensor body, and inside the sensor body includes a tube tube disposed around the temperature sensor, torch cutting device, characterized in that the coolant flows through the tube tube. The torch cutting device according to claim 2, further comprising a tube tube disposed around the temperature sensor in the sensor body, wherein cooling air flows through the tube tube. The torch cutting device according to claim 1, wherein the temperature sensor unit is mounted on at least one torch. The torch cutting device according to any one of claims 1 to 3, wherein a heat insulating material is interposed between the temperature sensor unit and the torch. In the slab cutting method by the movement of the torch, Measuring the surface temperature of the slab being cut, And a torch moving speed control step of increasing and decreasing the moving speed of the torch according to the increase and decrease of the measured surface temperature of the cast steel. The torch moving speed control step of claim 6, the torch moving speed is 100mm / min if the measured surface temperature of the slab is 300 degrees Celsius or less, 150mm / torch movement speed if the surface temperature of the measured slab is 300 to 400 degrees Celsius min, the torch movement speed is 200 mm / min when the measured temperature of the cast slab is 400 to 500 degrees Celsius, and the torch movement speed is 250 mm / min when the surface temperature of the measured slabs is 500 to 600 degrees Celsius, the surface temperature of the measured slabs. Is 600 to 700 degrees Celsius torch moving speed 300mm / min, if the measured surface temperature of the slab is more than 700 degrees Celsius, the torch moving speed is 350mm / min characterized in that the slab cutting method.

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