KR101562138B1 - Apparatus for controlling nozzle of finishing mill de-scaler and method thereof - Google Patents

Abstract

The present invention relates to an apparatus and a method to control a nozzle of a finishing mill de-scaler. The apparatus comprises: a data inputting part which receives at least one of a rolling reduction of a workpiece or roll gap data from a higher server or a higher apparatus; an injection height calculating part which calculates the injection height (h) from a reference position to a surface of the workpiece; an injection distance calculating part which calculates the injection distance (A) from the reference position to a surface of the workpiece using a lead angle (γ) data and the injection height (h) data calculated in the injection height calculating part; an injection length calculating part which calculates the injection length (B) using data of the injection angle (α), an offset angle (β), and the injection distance (A) calculated in the injection distance calculating part; and a control part which calculates the offset angle (β) to obtain an overlap amount (D) using data of the injection angle (α), the offset angle (β), a nozzle space (E), the injection height (h), and rotates the header direction of a de-scaler nozzle in response to the offset angle (β) by controlling the nozzle header operating part.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus and a method for controlling a nozzle of a finishing mill,

More particularly, the present invention relates to an apparatus and method for controlling a nozzle of a finishing rolling descaler, and more particularly, to an apparatus and method for controlling a nozzle of a finishing rolling descaler, And more particularly, to a nozzle control apparatus and method of a yarn rolling descaler that can be adjusted in accordance with a reduction amount.

In general, the plate rolling product must effectively remove scale formed in the heating furnace and the previous process in order to improve the surface quality.

For example, slabs extracted from a heating furnace are primarily passed through a hydraulic scale breaker (HSB) to remove most of the scale, and residual scales and secondary scales generated during rolling are removed in the finishing rolling process.

At this time, the scrap rolling descaler for removing the scale in the scrap rolling process is fixed and operated at a specific position with reference to the upper roll.

BACKGROUND OF THE INVENTION [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 10-2012-0110356 (published October 10, 2012, Decaler for Rolling Products).

An object of the present invention is to provide a nozzle control device for a yarn rolling descaler which can control the spraying direction of a yarn rolling descaler nozzle for removing scale by spraying high pressure water to adjust the overlap interval of high- And a method thereof.

An apparatus for controlling a nozzle of a finishing rolling descaler according to an aspect of the present invention includes an information input unit for inputting at least one of thickness reduction amount and roll gap information and thickness information from an upper server or an upper apparatus to a workpiece; A spray height calculating unit for calculating an spray height (h) from the reference position to the surface of the workpiece; (A) from the reference position to the surface of the workpiece using the lead angle (?) Information and the injection height (h) information calculated by the injection height calculator; An injection length calculation unit for calculating an injection length B using the injection angle alpha and offset angle beta information and the spray distance A information calculated by the spray distance calculation unit; And an offset angle beta for obtaining a desired overlap amount D using information on the jetting angle alpha, the lead angle gamma, the nozzle interval E and the jetting height h, And controlling the header direction of the descaler nozzle in accordance with the offset angle beta.

In the present invention, the reference position is a position at which a dispenser nozzle header is installed, and the injection height calculating unit subtracts thickness information of the workpiece from height information from the reference position to the transfer table, (H) from the reference position to the surface of the workpiece is calculated.

In the present invention, the spray distance calculating section is characterized by dividing the spray height (h) by the cosine value (cos?) Of the lead angle (?) And calculating the spray height (h / cos?).

In the present invention, the nozzle header driving unit is a means for mechanically linking the headers of at least one or more desalter nozzles arranged at a constant nozzle interval (E), and manually or automatically rotating the headers at a desired angle .

The nozzle head driving unit may include a link unit connected to both sides of the nozzle header and moved in a linear direction to rotate the header of the nozzle; A driving unit connected to the link unit by a driving gear to move the link unit in a linear direction; And a nozzle connection part connecting the nozzle header to the link part and rotating the nozzle header in conjunction with movement of the link part.

In the present invention, the link portion may include a first link connected to the nozzle connecting portion protruding to one side of the nozzle header, and a side of the link linked to the driving portion; And a second link installed parallel to the first link and connected to the nozzle connection portion protruded to the other side of the nozzle cover.

According to another aspect of the present invention, there is provided a method for controlling a nozzle of a finishing rolling descaler, comprising the steps of: a control unit receiving at least one of thickness reduction information and roll gap information and thickness information from an upper server or an upper apparatus; (H) from the reference position to the surface of the workpiece, a spray distance (A) from the reference position to the surface of the workpiece, and a spray length (A) sprayed from the nozzle to the workpiece (B) information; Calculating an offset angle beta for obtaining a desired overlap amount D using the spray angle alpha, the lead angle gamma, the nozzle interval E, and the spray height h information; And rotating the head direction of the descaler nozzle in accordance with the offset angle beta.

In the present invention, in the step of calculating the offset angle (?), The control section calculates the desired overlap amount (D), the injection angle (?), The lead angle (?), The nozzle interval (E) h) information to the equation (2) (2 * ((tan (? / 2) * (h / cos?)) * cos?)) / 2 * cos? And an offset angle? To be adjusted in order to obtain the offset angle?.

The present invention relates to an apparatus and a method for controlling a spraying apparatus for spraying high-pressure water by adjusting a spraying direction of a spraying descaler nozzle for removing scale by spraying high-pressure water to adjust the overlapping interval of high- .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exemplary diagram showing a schematic configuration of a nozzle control apparatus for a yarn rolling descaler according to an embodiment of the present invention; FIG.
FIG. 2 is an exemplary view for explaining various factors related to high-pressure water jetted from a nozzle header in FIG. 1; FIG.
Fig. 3 is an exemplary view for explaining the difference in the amount of high-pressure number overlapped on the workpiece at the entrance and exit sides of the work roll in Fig. 1; Fig.
4 is an exemplary view for explaining a method of adjusting the overlap amount of the high-pressure water by adjusting the offset angle through adjustment of the jetting direction of the descaler nozzle head in FIG.
FIG. 5 is an exemplary diagram illustrating a configuration of a nozzle header driving unit according to an exemplary embodiment of the present invention; FIG.
6 is a flowchart for explaining a nozzle control method of a finishing rolling descaler according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an apparatus and method for controlling a nozzle of a finishing rolling descaler according to the present invention will be described with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a diagram illustrating a schematic configuration of a nozzle control apparatus for a yarn rolling descaler according to an embodiment of the present invention. FIG. 2 is a graph showing various factors related to a high pressure water jetted from a nozzle header Fig.

As shown in FIG. 1, when the rolling process is performed, the workpiece 10 is moved along the feed rollers (not shown) and passes through the work rolls 20 and 30 to perform rolling. The descaler nozzle 50 is connected to the workpiece 10 passing between the pair of work rolls 20 and 30 in order to remove the scale generated on the surface of the workpiece 14 after the predetermined number of rolling processes have been performed And the high-pressure water 40 is sprayed.

The high-pressure water 40 may be supplied to the dispenser 100 in a variety of shapes depending on the shape of the dispenser 100 nozzle head (that is, the jet port through which the high-pressure water is sprayed) (not shown) Etc.). In this embodiment, it is assumed that the shape of the high-pressure water sprayed for the descaling is a fan shape. Accordingly, when the nozzle headers are rotated, the spraying direction can be adjusted.

Referring to FIGS. 1 and 2, the angle formed by the width of the high pressure water 40 is set to a spraying angle? (The spraying angle is fixed information) When the shape of the high-pressure water 40 is viewed from the side (that is, the side in the longitudinal direction in which the workpiece travels), an angle formed by a virtual center line of the nozzle header and a virtual vertical line perpendicular to the surface of the workpiece 10 A lead angle? (The lead angle is fixed information), a virtual horizontal line traversing in the width direction of the workpiece 10 and a nozzle header (a high pressure water jetted in a fan shape from the nozzle header) (The offset angle is changed as the nozzle head is rotated), the distance between the nozzle headers is defined as a nozzle interval E (the nozzle interval is fixed information), an offset angle is defined as an offset angle The high pressure water jetted from each of the nozzles (50) The length overlapped when viewed from the front (that is, the longitudinal direction in which the workpiece travels) is referred to as the overlap length (B) and the length of the high pressure water 40 ejected from each nozzle header D), the length of the high pressure water 40 sprayed from each nozzle header onto the workpiece 10 (that is, the length from the nozzle header to the surface of the workpiece along the imaginary center line of the nozzle header) The vertical distance between the nozzle headers and the nozzle headers on the surface of the workpiece 10 is defined as a jet height h (the jet height is referred to as a work height) It changes according to the thickness of the object).

1, an apparatus for controlling a nozzle of a yarn rolling descaler according to the present embodiment includes an information input unit 110, a jet height calculating unit 120, a jet distance calculating unit 130, a jet length calculating unit 140, A control unit 150, and a nozzle header driving unit 160.

The information input unit 110 receives the information on the amount of reduction (or roll gap information) and thickness information for the workpiece 10 from an upper server (or a higher-level apparatus) (not shown).

At this time, the spray distance A, spray height h, and spray length B to the workpiece 10 vary depending on the thickness information of the workpiece 10 and the amount of rolled-down information (or roll gap information).

The spray height calculating unit 120 calculates the spray height h from the reference position (i.e., the position where the nozzle head is installed) to the surface of the workpiece 10.

For example, the height from the reference position to the transfer table (not shown) is already known. Therefore, when the thickness information of the workpiece 10 is compensated (i.e., subtracted) from the reference position to the transfer table (not shown), the injection height from the reference position to the surface of the workpiece 10 h) can be calculated.

Further, a distance sensor (not shown) may be provided to detect the injection height h or to detect a more accurate injection height h. The control unit 150 may directly detect the spray height h from the reference position to the surface of the workpiece 10 by using the distance sensor (not shown).

The spray distance calculating unit 130 calculates the spray distance from the reference position using the known information (i.e., the lead angle?) And the spray height (h) information calculated by the spray height calculating unit 120 10 to the surface of the sample.

For example, the separation distance (A) can be calculated using 'h / cos?'.

The injection length calculating unit 140 calculates the injection length by using the known information (i.e., the injection angle? And the offset angle?) And the spray distance A calculated by the spray distance calculating unit 130, (B) of the high-pressure water (40) jetted from the surface of the high-pressure water (10).

For example, the spray length B can be calculated using '2 * (tan (? / 2) * A) * cos?'.

The injection height h, the spray distance A, and the spray length B information are calculated at the entrance and exit of the work rolls 20 and 30, respectively. This is because the thickness of the workpiece 10 at the mouth side is thicker than the thickness at the exit side so that the spray height h from the reference position (i.e., the position where the nozzle head is installed) to the surface of the workpiece 10, A), and the injection length (B) information (see FIG. 3).

For example, the inlet side injection height h and the exit side injection height h are different by the reduction thickness (see FIG. 3).

A difference also occurs in the overlap amount (or overlap length) D of the high pressure water according to the spray height h, the spray distance A, and the spray length B information (see FIG. 3).

Assuming that the dispense height h, the spray distance A, and the spray length B of the descaler nozzles provided at the inlet and outlet sides are equal to each other, at the inlet side where the workpiece 10 is inserted, h) is relatively short, the overlap amount (or overlap length) D is small or does not occur. However, on the exit side from which the workpiece 10 is discharged, an appropriate overlap amount (or overlap length) D occurs because the injection height h is relatively long (see FIG. 3).

Experiments have shown that the overlap amount (or overlap length) D of 10 to 15 (mm) is most suitable for scale removal. However, it is not necessary to define the overlap amount (or overlap length) D.

Therefore, it is necessary to adjust the offset angle? (See Fig. 4) in order to obtain an appropriate overlap amount (or overlap length) D at the entrance side (or exit side) of the work rolls 20 and 30.

Fig. 3 is an exemplary view for explaining the difference in high pressure number overlap amount injected to the workpiece at the entrance and exit sides of the work roll in Fig. 1, and Fig. 4 is an explanatory view And adjusting the amount of overlap of the high-pressure water by adjusting the offset angle through adjustment of the direction.

The controller 150 may calculate the overlap amount (or the overlap length) D using the injection length B, the nozzle interval E, and the offset angle? Information.

For example, the overlap amount (or overlap length) D can be calculated using '2 * (B / 2 * cos?) -E'. The overlap amount (or the overlap length) D is set to be 2 * (2 * ((tan (? / 2)) (2) by substituting the above equation for calculating the injection length B and the spray distance A into the above- * (h / cos?)) * cos?)) / 2 * cos?) -E '.

The control unit 150 determines whether or not the desired overlap amount (or overlap length) D (for example, 10 to 15 mm) and the already known or calculated spray angle?, The lead angle? The offset E to be adjusted by substituting the information on the distance E, and the injection height h.

When the offset angle [beta] to be adjusted as described above is calculated, the direction of the nozzle headers is rotated to correspond to the offset angle [beta].

The nozzle header driving unit 160 synchronizes the headers of at least one or more desalter nozzles arranged in a row with each other at a desired angle according to the control of the controller 150 as shown in FIG.

As shown in FIG. 5, the nozzle header driver 160 may mechanically link the headers of at least one descaler nozzle 50 and manually or automatically rotate the nozzles at a desired angle. However, the mechanical structure (link portion) for linking the header of the at least one descaler nozzle is described as an example.

FIG. 5 is an exemplary diagram illustrating a configuration of a nozzle header driving unit in FIG. 1 according to an exemplary embodiment of the present invention.

5, the nozzle 50 includes a nozzle cover 56 (or a nozzle header) 56 surrounding the nozzle body for spraying, a slit hole 57 (see FIG. 5) formed in the nozzle cover 56, And a nozzle connection part 58 formed on the nozzle cover 56 and connecting the link part 60. [

The nozzle cover 56 is rotated in conjunction with the movement of the link portion 60 connected to the nozzle connection portion 58.

The nozzle connection portion 58 protrudes from both sides of the nozzle cover 56 and is connected to the link portion 60. The link portion 60 includes a first link 62 and a second link 65 connected to both sides of the nozzle 50 and moved in a linear direction to rotate the nozzle 50.

The first link 62 is connected to a nozzle connecting portion 58 protruding to one side of the nozzle cover 56 and the side is connected to a driving portion 70 by a driving gear 74. The second link 65 is installed in parallel with the first link 62 and is connected to a nozzle connecting portion 58 protruding to the other side of the nozzle cover 56. [ The first link 62 and the second link 65 are connected to the nozzle connecting portion 58 by a fastening member 67.

The first link 62 can be moved left and right by the operation of the driving unit 70, and the operator can directly hold the first link 62 and move it to the left and right. Also, the second link 65 rotates the nozzle cover 56 while moving in a direction opposite to the first link 62. In one embodiment, the driving unit 70 includes a driving motor 72 and a driving gear 74.

The high pressure water 40 sprayed along the slit hole 57 of the nozzle 50 removes the scale formed on the surface of the workpiece 10. At this time, in order to effectively remove the scale, it is important to adjust the offset angle [beta] of the nozzle 50 so that the high pressure water 40 injected from each nozzle is appropriately overlapped, (See Fig. 4).

The controller 150 controls the nozzle header driving unit 160 to rotate the direction of the nozzle 50 to correspond to the offset angle beta. That is, by operating the driving unit 70 to rotate the driving gear 74 in a desired direction, the first link 62 engaged with the driving gear 74 moves while moving the nozzle cover (i.e., the nozzle head) 56 The angle at which the high pressure water is injected (that is, the offset angle) is changed while the slit hole 57 formed in the center of the nozzle cover 56 is rotated.

At this time, the controller 150 calculates offset angles? Of the descaler nozzles formed at the entrance and exit of the work rolls 20 and 30, and calculates the offset angle? ) Of the nozzle.

6 is a flowchart illustrating a method of controlling a nozzle of a finishing rolling descaler according to an embodiment of the present invention.

6, the control unit 150 uses the information input unit 110 to calculate information on the amount of reduction (or roll gap information) for the workpiece 10 from the upper server (or upper apparatus) (not shown) Information is input (S101).

The control unit 150 calculates the spray height h from the reference position (i.e., the position where the nozzle head is installed) to the surface of the workpiece 10 by using the spray height calculating unit 120, H / cos? 'By substituting known information (that is, the lead angle?) And the injection height (h) information calculated by the injection height calculating unit 120 using the reference position And calculates the jetting distance A to the surface of the workpiece 10 and calculates the jetting distance A based on the information already known (that is, the jetting angle alpha and the offset angle beta) The spray length B is calculated by substituting the spray distance A calculated by the calculating unit 130 into the formula 2 * (tan (? / 2) * A) * cos? '(S102).

A difference also occurs in the overlap amount (or overlap length) D of the high-pressure water depending on the jet height h, the jetting distance A, and the jetting length B. That is, a difference occurs in the overlap amount (or overlap length) D of the high pressure water jetted from the at least one descaler nozzle arranged in a line. In this embodiment, it is assumed that the appropriate overlap amount (or overlap length) D is 10 to 15 (mm). It is necessary to adjust the offset angle [beta] in order to obtain an appropriate overlap amount (or overlap length) D between the high pressure water jetted from the nozzles at the entrance or exit of the work rolls 20 and 30. [

The control unit 150 calculates information on the desired overlap amount (or overlap length) D and the already known or calculated injection angle?, The lead angle?, The nozzle interval E, and the injection height h, It is necessary to adjust it to obtain the desired overlap amount D by substituting it into the equation 2 * (2 * ((tan (? / 2) * (h / cos?)) * Cos? The offset angle beta is calculated (S103).

The control unit 150 controls the nozzle header driving unit 160 to rotate the header direction of the descaler nozzle in accordance with the offset angle? ).

At this time, the control for rotating the header direction of the descaler nozzle corresponding to the calculation of the offset angle? And the offset angle? Thereof is performed for each of the descaler nozzles formed on the entrance and exit of the work rolls 20, .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, I will understand the point. Accordingly, the technical scope of the present invention should be defined by the following claims.

10: workpiece 20: upper roll
30: Lower roll 40: High pressure water
50: nozzle 56: nozzle cover
57: Slit hole 58: Nozzle connection part
60: link portion 62: first link
65: second link 67: fastening member
70: driving part 72: driving motor
74: driving gear 110: information input unit
120: jet height calculating unit 130; Min.
140: injection length calculating unit 150:
160: nozzle header driving unit

Claims (8)

An information input unit for inputting at least one of thickness reduction amount and roll gap information and thickness information from the upper server or the upper apparatus to the workpiece;
A spray height calculating unit for calculating an spray height (h) from the reference position to the surface of the workpiece;
(A) from the reference position to the surface of the workpiece using the lead angle (?) Information and the injection height (h) information calculated by the injection height calculator;
An injection length calculation unit for calculating an injection length B using the injection angle alpha and offset angle beta information and the spray distance A information calculated by the spray distance calculation unit; And
An offset angle beta for obtaining a desired overlap amount D is calculated using the jetting angle alpha, the lead angle gamma, the nozzle interval E and the jetting height h, And controlling the header direction of the descaler nozzle in accordance with the offset angle (beta)
The nozzle head driver may include:
Characterized in that the means for mechanically linking the headers of at least one descaler nozzle arranged at a constant nozzle spacing (E) simultaneously and manually or automatically rotating at a desired angle.
The method according to claim 1,
The reference position is a position where a descaler nozzle header is installed,
The injection height calculating section calculates the injection height (h) from the reference position to the surface of the workpiece by subtracting thickness information of the workpiece from height information from the reference position to the transfer table, which is already known information Wherein the nozzle control device is a nozzle control device of a yarn rolling descaler.
The apparatus according to claim 1,
(H / cos?) Of the spray height (h) by the cosine value (cos?) Of the lead angle (?).
delete The apparatus of claim 1, wherein the nozzle header driver comprises:
A link portion connected to both sides of the nozzle header and moved in a linear direction to rotate the header of the nozzle; A driving unit connected to the link unit by a driving gear to move the link unit in a linear direction; And a nozzle connection unit connecting the nozzle header to the link unit and rotating the nozzle header in conjunction with movement of the link unit.
6. The apparatus according to claim 5,
A first link connected to the nozzle connection portion protruded to one side of the nozzle header and having a side gear connected to the driving portion; And a second link installed parallel to the first link and connected to the nozzle connection portion protruded to the other side of the nozzle cover.
The control unit receiving at least one of thickness reduction amount and roll gap information and thickness information from the upper server or the upper apparatus to the workpiece;
(H) from the reference position to the surface of the workpiece, a spray distance (A) from the reference position to the surface of the workpiece, and a spray length (A) sprayed from the nozzle to the workpiece (B) information;
Calculating an offset angle beta for obtaining a desired overlap amount D using the spray angle alpha, the lead angle gamma, the nozzle interval E, and the spray height h information; And
The controller controlling the nozzle header driving unit to rotate the header direction of the descaler nozzle in accordance with the offset angle,
The nozzle head driver may include:
Characterized in that the means for mechanically linking the headers of at least one or more desalter nozzles arranged at a constant nozzle spacing (E) simultaneously and manually or automatically rotating at a desired angle.
8. The method according to claim 7, wherein in calculating the offset angle (beta)
The control unit sets the desired overlap amount D, the injection angle alpha, the lead angle gamma, the nozzle interval E and the injection height h information to the following equation (2) / 2 * (h / cos?)) * Cos?)) / 2 * cos?) -E 'to calculate an offset angle? To be adjusted in order to obtain the desired overlap amount D Nozzle Control Method of Scrap Rolling Desalter.

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