JP2507686Y2 - Slab length measuring device in continuous casting equipment - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slab length measuring device for continuous casting equipment.

[0002]

2. Description of the Related Art Normally, in a continuous casting facility, a cast slab is cut into a predetermined length by a cutting device while moving while still hot.

Conventionally, in a device for measuring the length of a moving slab, a length-measuring roller interlocked with an encoder is directly pressed against the slab, and the rotation speed of the length-measuring roller is output as a pulse from the encoder. The length of the slab was measured by counting by the number.

By the way, the length measuring roller is worn during measurement, and an error occurs between the length measured by the encoder and the actually measured length. The correction circuit is configured to perform electrical correction by comparing and.

For example, one pulse is supposed to correspond to 1.0 mm, but one pulse is modified to correspond to 1.2 mm.

[0006]

However, since the length of the slab is actually measured after the slab itself has cooled, there is a problem that the time for correction is delayed, and there is a problem with the encoder. The error between the measured value and the actually measured value cannot always be said to be due to wear of the length-measuring roller, and there is a problem that the cause of the error cannot be immediately grasped accurately.

Therefore, an object of the present invention is to provide a slab length measuring device in a continuous casting facility which can solve the above problems.

[0008]

In order to solve the above problems, a slab length measuring device in a continuous casting facility according to the present invention is designed to be slidably in contact with a slab moving along a slab moving path for rolling measurement. A roller, a magnet scale arranged at a predetermined position, a chain body which is interlockingly connected to the length measuring roller via a clutch device and arranged endlessly along the magnet scale, and in the middle of the chain body. Attached to the magnet scale and detects a pulse based on magnetism when moving along the magnet scale, and outputs a signal corresponding to this pulse, and a predetermined reference distance in the middle of the slab moving path. With the slab detector placed in such a manner, the pulse detector compares the corresponding distance and the reference distance corresponding to the number of pulses detected while moving the reference distance, A square correction signal in response to the difference in the distance is obtained by construction of a controller having a comparator for outputting the arithmetic unit.

[0009]

According to the above construction, while the cutting length of the slab is being measured, the difference between the length measured by the length measuring roller and the reference distance is detected via the magnet scale and the difference is eliminated. Thus, the correction signal is sent to the controller. Therefore, the slab can always be cut with an accurate length.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. The slab length measuring device in the continuous casting facility according to the present invention automatically measures the length of the slab B moving along the slab moving path A, and thereby holds the slab B. The cutting instruction is given to a slab cutting machine C that moves at the same speed as the slab B.

That is, this slab length measuring device comprises a length-measuring roller 1 rotatably arranged so as to be slidably contactable with the lower surface of a slab B moving along a slab movement path A, and a slab movement. Magnet scale 3 arranged along one side of path A
And a chain body 6 endlessly wound around driving and returning sprockets 4 and 5 provided in the vicinity of the front and rear ends of the magnet scale 3, and the length measuring roller 1 of the chain body 6. A clutch device 7 for releasably connecting the drive sprocket 4 provided at the position and the connecting shaft body 2 connected to the length measuring roller 1, and a return device also provided on the other end side of the chain body 6. A drive motor 9 for rotating the sprocket 5 via a clutch device 8 and a pulse based on magnetism are detected when moving along the magnet scale 3 which is attached in the middle of the chain body 6 and responds to this pulse. A pulse detector 10 that outputs a signal, and a pair of front and rear slab detectors that are arranged in the middle of the slab movement path A and separated by a predetermined reference distance (L) to detect the tip of the slab B For example, photo sensor) 1
1, 12 and the corresponding distance corresponding to the number of pulses detected while the pulse detector 10 moves the reference distance and the reference distance (L) are compared, and the correction signal is calculated according to the difference between the two distances. And a control device (not shown) having a comparison unit for outputting to the unit.

In the above construction, the slab B moving along the slab moving path A has a predetermined cutting length measured by the length measuring roller 1 and moves along with the slab B. C
Is cut into a predetermined length.

By the way, when measuring the length of the slab B,
Whether or not the measurement value by the length measurement roller 1 is correct is detected, and if an error occurs, the correction is performed. That is, when measuring the length of the slab B, the length measuring roller 1 and the driving sprocket 4 are connected by the clutch device 7, and the chain body 6, that is, the pulse detector 10 also moves along the magnet scale 3.

The slab B is a pair of slab detectors 11,
A pulse based on magnetism generated via the magnet scale 3 is detected by the pulse detector 10 moved by the chain body 6 during the passage of the reference distance (L) between the 12 and this pulse of the control device. It is sent to the comparison unit and the moving distance (corresponding distance) on the magnet scale 3 is calculated.

Then, the moving distance calculated here and the reference distance (L) are compared, and if there is a difference between them, that is, if there is an error in the measurement value by the length measuring roller 1, the error is generated. The correction signal is sent to the calculation unit so as to eliminate the error, and the correction is always performed so that the measurement length by the length measurement roller 1 is accurate. Note that the temperature correction is performed in the same manner as in the past.

When the pulse detector 10 moves to the other end side, the clutch device 7 separates it from the length-measuring roller 1 side, and the clutch device 8 connects the drive motor 9 and the return sprocket 5. The chain body 6 is moved in the opposite direction by the drive motor 9, the pulse detector 10 is returned to the original position, and the measurement of the next slab B is prepared.

Thus, while measuring the cutting length of the slab, an error in the measuring length by the length measuring roller 1 is detected through the magnet scale 3 and
Since the correction signal is sent to the control device so as to eliminate the error, there is no time delay in error detection as in the conventional case, and the slab can always be cut with an accurate length.

By the way, in the above embodiment, only one pulse detector 10 was provided. However, for example, when the cutting length of the slab becomes short, the time measurement interval for the correction is short. Therefore, as shown in FIG. 2, the chain bodies 6A and 6B to which the pulse detectors 10A and 10B are attached are provided on both sides of the magnet scale 3.

In this case, the connecting shaft body 2 of the length measuring roller 1 and the driving sprockets 4A, 4 of the chain bodies 6A, 6B are used.
Clutch devices 7A and 7B are respectively interposed between the drive motor 9 and the drive motor 9 and the return sprockets 5A and 5B.
Clutch devices 8A and 8B are also interposed between B and B, respectively.

For example, when one pulse detector 10A is moved forward, the drive sprocket 4B of the other chain body 6B and the connecting shaft body 2 of the length measuring roller 1 are separated and the return sprocket is separated. The clutch device 8B on the 5B side is connected and is moved backward by the drive motor 9.

[0021]

As described above, according to the configuration of the present invention, while measuring the cutting length of the slab, the measurement length error by the length measuring roller is detected via the magnet scale, and Since the correction signal is sent to the control device so as to eliminate the error, there is no time delay in error detection as in the conventional case, and therefore the slab can always be cut with an accurate length.

[Brief description of drawings]

FIG. 1 is a plan view showing a schematic configuration of a cast piece length measuring device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a schematic configuration of a slab length measuring device according to another embodiment of the present invention.

[Explanation of symbols]

 1 Roller for length measurement 3 Magnet scale 4 Sprocket for drive 5 Sprocket for return 6 Chain body 7,8 Clutch device 9 Drive motor 10 Pulse detector 11,12 Cast slab detector

Claims (1)

(57) [Scope of utility model registration request] 1. A length-measuring roller which is slidably in contact with a slab moving along a slab moving path, is rollable, a magnet scale arranged at a predetermined position, and is interlocked with the length-measuring roller via a clutch device. A chain body that is connected and is arranged endlessly along this magnet scale, and a pulse based on magnetism is detected when this chain body is attached in the middle of the chain body and moves along the magnet scale. A pulse detector that outputs a corresponding signal,
A slab detector placed at a predetermined reference distance in the middle of the slab moving path, and a corresponding distance and a reference distance corresponding to the number of pulses detected while the pulse detector moves the reference distance. A slab length measuring device in a continuous casting facility, comprising: a control device having a comparison unit for comparing and outputting a correction signal to a calculation unit according to a difference between both distances.