KR102045554B1 - Apparatus for measuring gap between nozzle and roll - Google Patents

Abstract

According to an exemplary embodiment of the present invention, an apparatus for measuring a gap between a nozzle and a cooling roll is rotationally installed in a tundish provided with a nozzle through which molten metal is discharged and a lower portion of the nozzle to measure a gap between cooling rolls for manufacturing the molten metal with a strip. The apparatus comprises: a sensor unit having a light transmitting portion for transmitting a laser light to a space between the nozzle and the cooling roll, and a light receiving portion for receiving the laser light passing through the space; and a stage unit for moving the sensor unit to a standby position or a measurement position according to an operating state of the tundish.

Description

Gap BETWEEN NOZZLE AND ROLL for Measuring Gap between Nozzle and Cooling Roll

The present invention relates to a gap measuring device between the nozzle and the cooling roll.

In the PFC (Planar Flow Casting) process, a tundish including a crucible having a molten metal in the upper part and storing and heating functions is provided, and a nozzle for discharging the molten metal is located in the lower part. A cooling roll for rapid cooling is located. The molten metal stored in the crucible is discharged to the cooling roll through the nozzle and rapidly cooled to have an amorphous structure.

In order to produce an amorphous strip of constant thickness from several micrometers to several tens of micrometers using the PFC method, it is important to continuously measure the distance between the cooling roll and the nozzle during operation and to control it to be kept constant.

However, the gap between the cooling roll and the nozzle is too small, and there is a difficulty in measuring the real time interval due to the hot molten metal discharged from the nozzle and the molten metal scattered when contacted with the cooling roll. In the past, the gap between the cooling roll and the nozzle was set in advance before the operation, and during the operation, the method was controlled depending on the operator's know-how or the distance between the cooling roll and the nozzle was measured using a camera. When measuring the distance between the cooling roll and the nozzle at a long distance by using the camera, the camera can be adjusted at a long distance so that it does not interfere with tundish and other operating equipment. However, the scattering of light due to hot molten metal and the limitation of image processing time Due to the limitation of the real time interval measurement.

Japanese Patent Laid-Open No. 2002-248548

An object of the present invention is to provide an apparatus for measuring a gap between a nozzle and a cooling roll that can solve the above problems with the conventional PFC process technology.

However, the object of the present invention is not limited thereto, and even if not explicitly mentioned, the object which can be grasped from the solution means or the embodiment described below will be included.

An apparatus for measuring a gap between a nozzle and a cooling roll according to an exemplary embodiment of the present invention includes a tundish provided with a nozzle through which molten metal is discharged and rotatably installed at a lower portion of the nozzle to manufacture the molten metal into a strip. An apparatus for measuring an interval between cooling rolls, comprising: a sensor unit including a light transmitting portion for transmitting a laser beam to a space between the nozzle and the cooling roll, and a light receiving portion for receiving the laser light passing through the space; And a stage unit for moving the sensor unit to a standby position or a measurement position according to the operation state of the tundish, wherein the sensor unit has a structure in which the light transmitting portion and the light receiving portion face each other with the space interposed therebetween. The gap may be measured by using the laser beam transmitted by the nozzle or the cooling roll and transmitted to the light receiving unit.
In addition, the gap measuring device between the nozzle and the cooling roll according to an exemplary embodiment of the present invention, a tundish having a nozzle for discharging the molten metal and rotatably installed in the lower portion of the nozzle to the molten metal into a strip An apparatus for measuring an interval between cooling rolls to be produced, comprising: a sensor unit including a light transmitting portion for transmitting a laser beam in a space between the nozzle and the cooling roll, and a light receiving portion for receiving the laser beam reflected after the light projection; And a stage unit for moving the sensor unit to a standby position or a measurement position according to the operation state of the tundish, wherein the sensor unit includes the light transmitting portion and the light receiving portion integrally or at the time of measuring the light receiving portion and the light receiving portion. Is disposed together in front of or behind the nozzle and the cooling roll, the distance can be measured by using the laser beam transmitted by the nozzle or the cooling roll reflected to the light receiving unit.

The measurement position may be defined as a position that causes a collision with the sensor unit when the tundish is driven forward and backward, and the standby position may be defined as a position that does not cause a collision with the sensor unit when the tundish is driven forward and backward.

The stage unit may be disposed such that the light transmitting portion and the light receiving portion face each other in a state where the light transmitting portion and the light receiving portion are mounted, respectively, and reciprocate in a first direction to adjust a horizontal distance between the light transmitting portion and the light receiving portion. A first stage; A second stage supporting the first stage and reciprocating in a second direction perpendicular to the first direction, and adjusting a horizontal distance between the sensor unit, the cooling roll, and the tundish; And supporting the second stage and reciprocating in a third direction perpendicular to a plane implemented by the first direction and the second direction, and adjusting a vertical distance between the sensor unit, the cooling roll, and the tundish. It may include three stages.

The second stage includes a first support on which the first stage is placed and arranged side by side in the second direction, a second support connecting the first support in the first direction, and one end connected to the third stage to extend in the second direction. And a third support to which the second support is reciprocated, and the third stage may include a variable frame to which the third support is connected and reciprocated in the third direction, and a fixed frame supporting the variable frame.

The apparatus may further include a control unit that controls the operation of the stage unit and calculates an interval between the nozzle and the cooling roll.

The nozzle may have a groove forming a step with a bottom surface at both edges of the molten metal from which the molten metal is not discharged, and the light transmitting part may transmit a laser beam in a space between the cooling roll including the groove.

According to one embodiment of the present invention, there can be provided a gap measuring device between the nozzle and the cooling roll that can solve the above problems with the conventional PFC process technology.

Various and advantageous advantages and effects of the present invention is not limited to the above description, it will be more readily understood in the course of describing specific embodiments of the present invention.

1 is a perspective view schematically showing an apparatus for measuring a gap between a nozzle and a cooling roll according to an exemplary embodiment of the present invention.
2A and 2B are rear views schematically showing a state in which the sensor unit is moved to the measurement position and the standby position by the stage unit, respectively.
3 is a side view schematically showing a state in which a sensor unit is moved to a measurement position.
4A and 4B are side views schematically showing the standby and operating states of the tundish, respectively.
5 is a schematic diagram illustrating a concept for measuring a gap between a nozzle and a cooling roll.
Figure 6 is a side view schematically showing a modification of the sensor unit in the gap measuring device between the nozzle and the cooling roll according to an exemplary embodiment of the present invention.
7 is a flow chart illustrating the operation of a gap measuring device between a nozzle and a cooling roll in accordance with an exemplary embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. However, in describing the preferred embodiment of the present invention in detail, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, the same reference numerals are used throughout the drawings for parts having similar functions and functions.

In addition, throughout the specification, when a part is 'connected' to another part, it is not only 'directly connected' but also 'indirectly connected' with another element in between. Include. In addition, the term 'comprising' of an element means that the element may further include other elements, not to exclude other elements unless specifically stated otherwise.

An apparatus for measuring a gap between a nozzle and a cooling roll according to an exemplary embodiment of the present invention will be described with reference to FIGS. 1 to 5.

1 is a perspective view schematically illustrating an apparatus for measuring a gap between a nozzle and a cooling roll according to an exemplary embodiment of the present invention, and FIGS. 2A and 2B are views in which a sensor unit is moved to a measurement position and a standby position by a stage unit, respectively. It is a rear view which shows the state schematically, and FIG. 3 is a side view which shows the state which the sensor unit moved to the measurement position. 4A and 4B are side views schematically showing the standby state and the operating state of the tundish, respectively, and FIG. 5 is a schematic diagram illustrating the concept for measuring the distance between the nozzle and the cooling roll.

The distance measuring device 1 between the nozzle and the cooling roll according to an exemplary embodiment of the present invention is rotatable under the nozzle and the tundish T having the nozzle N through which the molten metal is discharged. It is installed adjacent to the cooling roll (R) for producing molten metal into strips to measure the fine gap (D) between the nozzle (N) and the cooling roll (R).

In one embodiment, the distance measuring device 1 between the nozzle and the cooling roll according to the present invention is a tundish T in a standby state before operation, and moves forward to operate and is located at the top of the cooling roll R. The position may be controlled according to the operating state of the tundish T, such as the tundish T in the operating state.

Referring to the drawings, the gap measuring device 1 between the nozzle and the cooling roll according to an exemplary embodiment of the present invention may include a sensor unit 10.

The sensor unit 10 may include a light transmitting part 11 for transmitting the laser light L and a light receiving part 12 for receiving the laser light L. FIG. The sensor unit 10 may include, for example, a laser displacement sensor.

In one embodiment, the light transmitting part 11 and the light receiving part 12 are disposed at the front and rear of the nozzle N and the cooling roll R, respectively, with the space between the nozzle N and the cooling roll R interposed therebetween. Can be. In addition, the light transmitting part 11 and the light receiving part 12 may be disposed on both left and right sides of the nozzle N with the space between the nozzle N and the cooling roll R interposed therebetween. That is, a pair of sensor units 10 including the light transmitting portion 11 and the light receiving portion 12 are disposed at both the left and right sides in the longitudinal direction of the nozzle N, and the light transmitting portion of the sensor unit 10 disposed at each of the two sides. 11) and the light receiving portion 12 may have a structure that is disposed on both the left and right in the width direction of the nozzle (N).

The light transmitting part 11 transmits the laser light L to the space between the nozzle N and the cooling roll R, and the light receiving part 12 passes through the space between the nozzle N and the cooling roll R. The laser beam L can be received from the opposite side. For example, the light (laser light) transmitted from the light transmitting part 11 is partially covered by the nozzle N and the cooling roll R, and only a portion corresponding to the gap therebetween is transmitted to the light receiving part 12. The fine gap D can be measured using the

On the other hand, the light emitted from the molten metal discharged from the nozzle (N) of the tundish (T) is mainly visible light of infrared rays and red color, and the light transmitting part 11 to minimize the interference with the light of the molten metal May use a green laser or a blue laser.

In one embodiment, to protect the sensor unit 10 from the molten metal, the light transmitting portion 11 and the light receiving portion 12 may be accommodated in a housing (not shown) made of a material having excellent heat resistance, respectively.

Referring to the drawings, the gap measuring device 1 between the nozzle and the cooling roll according to the exemplary embodiment of the present invention may include a stage unit 20.

The stage unit 20 supports the sensor unit 10 and may selectively move the sensor unit 10 to the standby position or the measurement position according to the operation state of the tundish T.

In one embodiment, the measurement position may be defined as a position causing a collision with the sensor unit 10 during the forward and backward driving according to the standby state and the operating state of the tundish T. For example, as in FIG. 2A, in the measurement position, the sensor unit 10 faces each other with the light transmitting part 11 and the light receiving part 12 facing each other with a space between the nozzle N and the cooling roll R interposed therebetween. The structure may be disposed in front and rear of the nozzle (N) and the cooling roll (R), respectively, and the laser light (L) transmitted from the light transmitting portion 11 is at least by the nozzle (N) or the cooling roll (R). It may be partially covered and partly received by the light receiving unit 12.

On the other hand, the standby position may be defined as a position that does not cause a collision with the sensor unit 10 during the front and rear driving of the tundish (T). For example, as shown in FIG. 2B, in the standby position, the sensor unit 10 may be spaced apart from the cooling roll R and the tundish T by a predetermined distance.

The stage unit 20 may include a first stage 21, a second stage 22, and a third stage 23.

The first stage 21 is disposed so that the light transmitting portion 11 and the light receiving portion 12 face each other in a state where the light transmitting portion 11 and the light receiving portion 12 are mounted, respectively, and reciprocated in the first direction (X-axis direction). The horizontal distance between the light transmitting part 11 and the light receiving part 12 may be adjusted while moving.

The second stage 22 supports the pair of first stages 21 and reciprocates in a second direction (Y-axis direction) perpendicular to the first direction, and moves the sensor unit 10, the cooling roll R, and the turn. The horizontal distance between the dishes T can be adjusted. The second stage 22 includes a first support 22a on which the first stage 21 is placed and arranged side by side in the second direction, and a second support 22b connecting the first support 22a in the first direction. And a third support 22c connected to one end of the third stage 23 to extend in the second direction and connected to the second support 22b to reciprocate.

The third stage 23 supports the second stage 22 and reciprocates in a third direction (Z-axis direction) perpendicular to the plane embodied by the first direction and the second direction, and moves the sensor unit 10 and the cooling roll. Vertical distance between (R) and tundish (T) can be adjusted. The third stage 23 may include a variable frame 23a to which the third support 22c is connected and reciprocate in the third direction, and a fixed frame 23b to support the variable frame 23a.

As shown in FIG. 4A, for the PFC operation, the tundish T is generally waited at a position away from the top of the cooling roll R during the standby state or the preparation for operation, and the maintenance of the tundish T, the refractory filling, and the like. The work is done. This prevents the collision between the nozzle N and the cooling roll R due to the shaking or sagging of the tundish T during maintenance, and the deterioration of the cooling roll R due to the high temperature and high temperature during material melting. Has a purpose.

And, as in Figure 4b, for operation, the tundish (T) is advanced forward and located on the top of the cooling roll (R), after the end of the strip production is moved back to the original position in the standby state.

Therefore, the sensor unit 10 measuring the distance D between the cooling roll R and the nozzle N should be installed so as not to be subjected to collision / interference due to the driving of the tundish T. Depending on the operating state of T), the second stage 22 and the third stage 23 may move the sensor unit 10 from the standby position to the measurement position or from the measurement position to the standby position (Figs. 2a and 2b). The first stage 21 finely adjusts the distance between the light transmitting part 11 and the light receiving part 12 and the nozzle N or the cooling roll R at the measurement position to adjust the tundish T and the cooling roll R. Minimize interference with the containing production equipment. Of course, it can also be used to set the position to fit the effective measurement distance of the sensor unit 10.

Referring to the drawings, an apparatus for measuring a gap between a nozzle and a cooling roll according to an exemplary embodiment of the present invention may include a control unit 30.

The control unit 30 may control the operation of the stage unit 20. For example, the second stage 22 and the third stage 23 of the stage unit 20 may be controlled to move the sensor unit 10 to the standby position or the measurement position. In addition, the first stage 21 may be controlled to adjust the distance between the light projector 11 and the light receiver 12.

The control unit 30 can calculate the space | interval D between the nozzle N and the cooling roll R. FIG. The control unit 30 controls the light emission of the laser light L in the light transmitting part 11, analyzes the laser light L received by the light receiving part 12, and between the nozzle N and the cooling roll R. The interval D can be calculated.

In calculating the spacing between the nozzle N and the cooling roll R, the PFC plant uses the spacing D between the nozzle N and the cooling roll R between the large tundish T and the cooling roll R. ) Is set to several hundred micrometers, the space is severely restricted when the light transmitting portion 11 and the light receiving portion 12 are provided. Also, in general, the distance between the light transmitting portion 11 and the light receiving portion 12 is about several tens of centimeters, so that long distance measurement is possible to avoid interference between the cooling roll R and the tundish T while maintaining the desired measurement accuracy. This is impossible.

In the present invention, a commercially available laser displacement sensor is used, and the measurement is performed in a range outside the specification of the sensor by installing by avoiding the interference between the cooling roll R and the tundish T. That is, when the distance between the light transmitting part 11 and the light receiving part 12 is increased, the minimum measurement interval that the laser displacement sensor can measure increases proportionally. When the distance between the nozzle N and the cooling roll R is smaller than this, It becomes impossible to measure. In order to solve this problem, in the present invention, the lower part of the nozzle N may be partially processed to secure a minimum measurement interval.

As shown in Figure 5, the nozzle (N) may be provided with grooves (G) forming a step with the bottom surface on each side edge of the molten metal is not discharged. Therefore, the distance D between the nozzle N and the cooling roll R is increased by the size of the groove G at the position where the groove G is provided.

The light transmitting part 11 transmits the laser light L into a space between the cooling rolls R including the grooves G, and the light receiving part 12 transmits the laser light L that has passed through the groove G. And the control unit 30 subtracts the distance D2 corresponding to the size of the groove from the distance D1 between the groove G and the cooling roll R between the nozzle N and the cooling roll R. The interval D of can be calculated.

6 schematically shows a modification of the sensor unit in the gap measuring device between the nozzle and the cooling roll.

As shown in FIG. 6, the light transmitting part 11 and the light receiving part 12 may be integrally formed, or may be disposed together at the front or the rear of the nozzle N and the cooling roll R.

The laser light L transmitted by the light transmitting part 11 is reflected by the nozzle N and the cooling roll R, and corresponds to the space, that is, the space D between the nozzle N and the cooling roll R. The part passes through as it is. Therefore, the space | interval D between the nozzle N and the cooling roll R can be measured by calculating the width | variety of the reflected laser beam L. FIG.

In the configuration in which the light transmitting portion 11 and the light receiving portion 12 are integrally formed as in the present embodiment, the light transmitting portion 11 and the light receiving portion 12 are disposed in a configuration in which the light transmitting portion 11 and the light receiving portion 12 face each other. The advantage is that the alignment is not necessary. In addition, the molten metal can be disposed avoiding the scattering direction, there is an advantage that the structure is simple. For example, the first stage 21 to which the light transmitting part 11 and the light receiving part 12 are mounted may be provided as a single unit, and a single stage 21 may be provided to adjust the distance between the light transmitting part 11 and the light receiving part 12. Adjusting the distance between the first stage 21 of the pair can be omitted.

7 is a flowchart illustrating the operation of a gap measuring device between a nozzle and a cooling roll according to an exemplary embodiment of the present invention.

Referring to FIG. 7, when the tundish T is advanced to the operation position (S1), the control unit 30 confirms that the tundish T is in the operating state and the second stage 22 of the stage unit 20. ) And the third stage 23 to move the sensor unit 10 to the measurement position under the tundish T. Then, the first stage 21 is driven to adjust the distance between the light transmitting part 11 and the light receiving part 12 (S2). At this time, the moving speed is operated at a low speed to avoid collision between the sensor unit 10 and the cooling roll R due to the shaking.

Next, when the tundish T is lowered to the upper portion of the cooling roll R to produce a strip (S3), the control unit 30 drives the sensor unit 10 to between the cooling roll R and the nozzle N. The interval D is measured in real time (S4). Then, the tundish T is lowered or raised based on the measured interval to adjust the interval between the cooling roll R and the nozzle N. In general, the tundish (T) moved to the initial operation position is located above the operation position to avoid collision with the cooling roll (R).

Next, after the operation is terminated or the operation is stopped due to an emergency or the like and the tundish T is raised (S5), the control unit 30 moves the first to third stages 21, 22, and 23. The sensor unit 10 is driven to return to the standby position (S6). In particular, the movement speed of the stage unit 20 may proceed at a higher speed than the movement speed to the measurement position for the protection of the sensor unit 10 and the convenience of follow-up when the operation is stopped due to an emergency situation.

Next, when the sensor unit 10 moves to the standby position by the stage unit 20, the tundish T reverses and waits in the standby state at the standby position (S7).

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can realize that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. I can understand. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

1 ... gap measuring device between nozzle and cooling roll
10 ... sensor unit
11 ... Floodlight
12 ... Receiver
20 ... Stage Unit
21 ... First Stage
22 ... Second Stage
23 ... Third Stage
T ... Tundish
N ... Nozzle
R ... chill roll
L ... laser light

Claims (7)

An apparatus for measuring a distance between a tundish having a nozzle for discharging molten metal and a cooling roll rotatably installed at a lower portion of the nozzle to produce the molten metal into a strip.
A sensor unit including a light transmitting unit for transmitting a laser beam to a space between the nozzle and the cooling roll, and a light receiving unit for receiving the laser beam passing through the space; And
A stage unit for moving the sensor unit to a standby position or a measurement position according to the operating state of the tundish
Including,
In the measurement, the sensor unit is disposed in a structure in which the light transmitting part and the light receiving part face each other with the space interposed therebetween, and the light emitted by the nozzle or the cooling roll is transmitted to the light receiving part. An interval measuring device between the nozzle and the cooling roll to measure the interval.
An apparatus for measuring a distance between a tundish having a nozzle for discharging molten metal and a cooling roll rotatably installed at a lower portion of the nozzle to produce the molten metal into a strip.
A sensor unit including a light projecting unit for projecting a laser beam into a space between the nozzle and the cooling roll, and a light receiver unit for receiving the laser beam reflected after the projecting; And
A stage unit for moving the sensor unit to a standby position or a measurement position according to the operating state of the tundish
Including,
The sensor unit may include the light transmitting portion and the light receiving portion integrally or at the same time, the light transmitting portion and the light receiving portion are disposed at the front or the rear of the nozzle and the cooling roll, and the nozzle or the cooling among the transmitted laser beams. An apparatus for measuring a gap between a nozzle and a cooling roll for measuring the gap by using the reflection by a roll and transmitted to the light receiving unit.
The method according to claim 1 or 2,
The measurement position is defined as a position causing a collision with the sensor unit during the forward and backward driving of the tundish, and the standby position is defined as a position that does not cause a collision with the sensor unit during the forward and backward driving of the tundish. Gap measuring device between nozzle and cooling roll.
The method of claim 1,
The stage unit,
A first stage in which the light transmitting part and the light receiving part are mounted so as to face each other, the first light emitting part reciprocating in a first direction, and adjusting a horizontal distance between the light transmitting part and the light receiving part;
A second stage supporting the first stage and reciprocating in a second direction perpendicular to the first direction, and adjusting a horizontal distance between the sensor unit, the cooling roll, and the tundish; And
A third supporting the second stage and reciprocating in a third direction perpendicular to a plane implemented by the first direction and the second direction and adjusting a vertical distance between the sensor unit, the cooling roll, and the tundish; stage;
Device for measuring the gap between the nozzle and the cooling roll comprising a.
The method of claim 4, wherein
The second stage includes a first support on which the first stage is placed and arranged side by side in the second direction, a second support connecting the first support in the first direction, and one end connected to the third stage in the second direction. A third support extended in length and connected to the second support to reciprocate;
The third stage, the gap measuring device between the nozzle and the cooling roll, characterized in that it comprises a variable frame to which the third support is connected and reciprocating in the third direction, and a fixed frame for supporting the variable frame.
The method according to claim 1 or 2,
And a control unit which controls the operation of the stage unit and calculates a distance between the nozzle and the cooling roll.
The method according to claim 1 or 2,
The nozzle has a groove forming a step with the bottom surface at both edges of the molten metal is not discharged,
And the light transmitting part transmits a laser beam in a space between the cooling roll including the groove, and a gap measuring device between the nozzle and the cooling roll.

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