JP2553616Y2 - Apparatus for determining slab clamping state in continuous cast slab clamping type cutting machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for judging an abnormality of a slab clamping apparatus during cutting in a continuous casting slab clamping type cutting machine of a continuous casting facility.

[0002]

2. Description of the Related Art Continuous casting materials sent from a continuous casting machine are:
The rolled material is cut into cast pieces of a predetermined length. Such cutting is generally performed by a cutting device that moves in synchronization with the continuous casting material conveyed on the roller table, and the cut slab is separated from the continuous casting material by the roller table and discharged.

A device for adjusting the moving speed of the cutting device to the continuous casting material is disclosed, for example, in Japanese Utility Model Laid-Open No. 47-2.
As disclosed in Japanese Patent Application Laid-Open No. 3429 and Japanese Patent Application Laid-Open No. 49-65326, there is a method of clamping with a slab clamp device.

[0004] If the cylinders of these clamping devices malfunction or the contact portions with the slab are worn out, the pressing force of the slab is insufficient and the moving speed of the cutting machine main body cannot be synchronized with the casting speed. However, there is a problem that cutting is impossible, cutting length is defective, and cutting shape is defective.

[0005]

[Problems to be Solved by the Invention] Conventionally, during a slab cutting operation, it is necessary for an operator to monitor and judge the holding state of the cutting machine from the cutting machine operation room visually or through an image of a camera. It was an obstacle in terms of unmanning. Further, since the cutting of the slab is performed every 2 to 5 minutes, there has been a problem in that the monitoring work load of the operator is reduced.

The present invention solves the above-mentioned problems, and provides a slab-clamping state determination device in a continuous cast slab-clamping and cutting machine that automatically determines an abnormality of a slab clamping device during slab cutting.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a moving distance meter attached to a cutting machine body which has a slab clamping device and moves in synchronization with the movement of a continuously cast slab, and measures the casting length of the continuous cast slab. The slab length meter to be continuously compared with the cutting machine body moving distance from the start of the cutting to the completion of the cutting and the casting length of the continuous casting slab. When the moving distance is short, the slab clamping device comprises a computer that determines that there is an abnormality, in the continuous cast slab clamping type cutting machine that automatically and quickly determines the abnormality of the slab clamping device during cutting. It is a device for determining a slab clamping state.

[0008]

According to the present invention, a moving distance meter is installed on a cutting machine body equipped with a slab clamping device that moves in synchronization with the movement of a continuous cast slab, and the moving distance meter and the casting length of the continuous slab are measured. By a slab length gauge to be, and a calculator that compares the moving distance of the cutting machine and the pouring length of the continuous cast material, the two lengths in the computer that have been recorded in the past simultaneously with the start of cutting are once reset to zero, Then, by continuously comparing the lengths sent from each of the measuring instruments to the computer at the same timing, it is automatically determined whether or not the synchronization between the continuous cast material and the cutting machine is normally performed. This is to make a judgment.

Here, when the lengths of the two do not match, a signal is sent from the computer to the cutting machine control panel or the like to generate an alarm of abnormality and notify the operator of the abnormality.
Alternatively, a measure such as forcibly stopping the cutting is performed.

[0010]

FIG. 3 is a drawing showing an example of a slab clamping device conventionally used in a continuous cast slab cutting machine.

The slab clamping device operates a piston rod 4 connected to a clamp cylinder 3 with air or hydraulic oil, so that a pressing piece 6 is pressed through a clamp lever 5 so that a continuous casting material 1 on a roller table 2 is formed. Pressed to. Reference numeral 7 denotes a clamp traveling motor, and 8 denotes a clamp traveling screw shaft.

By clamping the continuous cast material 1 with this clamp device, a cutting machine body 12 described later can move in synchronization with the casting speed of the continuous cast material 1.

FIG. 1 is a plan view showing an example of the apparatus for judging a slab holding state according to the present invention, and FIG. 2 is a front view thereof. 1 and 2, after the clamp operation is performed, the cutting torch 9 is moved to the torch carriage 1 while the cutting machine body 12 is moved in synchronization with the continuous casting material 1.
0, and the continuous cast material 1 is cut.

The determination of the slab clamping state according to the present invention is performed by comparing the rack 16 installed along the traveling line of the cutting machine main body 12 with the pinion gear 17 fixed to the cutting machine main body 12 and in contact with the rack 16. A slab length measuring roll 14 is brought into contact with the lower surface of the continuous casting material 1 by using a moving distance measuring device 18 for measuring the moving distance of the cutting machine main body. This is performed by a cast slab pouring length measuring device 15 for measuring the cast length and a computer 19 for comparing the main body movement distance measured by each measuring device with the pouring length. Here, as a method of grasping the moving distance of the cutting machine main body 12, traveling wheels or the like may be used.

FIG. 4 is a flow chart showing a flow of determining a slab clamping state according to the present invention. The pressing piece 6 of the clamp device is pressed against the continuous cast material 1 in accordance with the cutting command of the continuous cast slab. At the same time, the moving distance of the cutting machine body 12 in the computer 19 and the casting length of the continuous casting material 1 are once cleared to zero. Thereafter, the two lengths sent from time to time to the computer 19 from the moving distance measuring device 18 and the slab casting length measuring device 15 are:
Continuous comparison is performed at the same timing.

Here, [cast length-movement distance]> L mm
In this case, the cutting machine main body 12 is moving with a delay without being synchronized with the continuous casting material 1, and it can be determined that the clamping state of the slab is abnormal. Here, Lmm, which is the difference between the casting length and the moving distance, is basically 0 mm.
mm, but when there is an error between the casting and casting length measuring device 15 and the moving distance measuring device 18, a value in consideration of the error may be set.

In this embodiment, since the slab casting length measuring device 15 for measuring the casting length of the continuous casting material 1 is located very close to the cutting machine main body 12, the casting length of the hot continuous casting material 1 is reduced. Although it is not necessary to multiply the shrinkage coefficient,
5 is installed at a position quite remote from the cutting machine main body 12, the slab is thermally contracted from the position where the casting length of the continuous casting material 1 is measured to the cutting machine main body 12. It is necessary to multiply the casting length by the shrinkage coefficient.

Only when the computer 19 detects that the speed of the cutting machine main body 12 is not synchronized with the continuous casting material 1 as described above, a signal is transmitted from the computer 19 to the cutting machine control panel 20 or the like and an alarm is issued. The operator only needs to confirm and take action on the cut length defect, cut surface shape defect, etc. only when this alarm is generated, and it is necessary to be resident in the cutting operation room and monitor the slab cutting condition sequentially. Disappears.

When this alarm occurs, there is a possibility that a slab clamping state defect may have occurred due to a malfunction of the clamp cylinder 3, a breakage of the piston rod 4, a pressing defect due to abrasion of the pressing member 6, or the like. However, it is difficult to continuously cut the continuous cast material 1, and measures such as forcibly stopping cutting can be performed through the cutting machine control panel 20, and a temporary measure for a machine trouble can be promptly executed.

[0020]

[Effect of the Invention] As described above, by using the cutting machine equipped with the apparatus for judging the slab holding state of the present invention,
The operator does not need to constantly monitor the holding state of the cutting machine, and can reduce the load of the cutting monitoring work.

Further, since an abnormality of the slab clamping device, which is a device for synchronizing with the casting speed of the cutting machine body, can be detected at an early stage,
Problems such as inability to cut, defective cutting length, and defective cutting shape can be detected quickly, and damage can be minimized.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a cutting machine provided with a device for determining a slab clamping state according to the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a drawing showing an example of a slab clamping device used in a conventional slab cutting machine.

FIG. 4 is a flowchart of the determination of a slab clamping state according to the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Continuous cast slab 2 Roller table 3 Clamp cylinder 4 Piston rod 5 Clamp lever 6 Pressing piece 7 Clamp traveling motor 8 Clamp traveling screw shaft 9 Cutting torch 10 Torch trolley 11 Torch trolley traveling rail 12 Cutting machine body 13 Cutting machine main body Wheel 14 Slab measuring roll 15 Slab casting length measuring device 16 Rack 17 Pinion gear 18 Moving distance measuring device 19 Calculator 20 Cutting device control panel

Claims (1)

(57) [Scope of request for utility model registration] 1. A moving distance meter attached to a cutting machine main body which has a slab clamping device and moves in synchronization with the movement of a continuous cast slab;
A slab length measuring device that measures the casting length of a continuous cast slab, the cutting machine body moving distance from the start of cutting to the completion of cutting, and the casting length of the continuous cast slab are continuously compared. When the moving distance of the cutting machine main body is short with respect to the casting length, the slab clamping device in the continuous cast slab clamping type cutting machine characterized by comprising a computer that determines that the slab clamping device is abnormal. Judgment device.