KR101424458B1 - Apparatus for controlling mandrel of coiler and method thereof - Google Patents

Abstract

The present invention relates to an apparatus and a method for controlling a mandrel of a winding machine, which can adjust the roll diameter of a mandrel capable of independently controlling the left and right sides so that the same tension is applied to the entire area of the strip, The generation of the scope can be prevented and the winding-up property can be improved.

Description

[0001] APPARATUS FOR CONTROLLING MANDREL OF COILER AND METHOD THEREOF [0002]

More particularly, the present invention relates to an apparatus and method for controlling a mandrel in a winder, and more particularly, to a method and apparatus for controlling a mandrel, To a mandrel control device of a take-up machine and a method thereof.

Generally, in a hot rolling mill, a material such as a slab is heated to a predetermined temperature in a heating furnace, then subjected to width rolling and thickness rolling through a width rolling mill and a rough rolling mill, thinly rolled through a finishing mill, To produce a hot-rolled coil which is the material of a desired product or a post-process cold rolling process.

The main facilities of this hot rolling process are heating furnace, width mill, roughing mill, finishing mill, and coiling machine. Particularly, finishing rolling process by finishing rolling mill and winding process by winding machine ensures smooth winding It is a very important process to satisfy both conditions.

Further, in the correction line, the wound coil is unwound, passed through a temper rolling mill and wound up again to improve the shape of the coil, improve the surface quality, and improve the mechanical properties.

Related Prior Art Korean Patent Laid-Open No. 10-2003-0053742 (July 02, 2003) entitled "Strip guide device for winding machine"

The present invention provides a device for controlling mandrel of a take-up machine and method for controlling the roll diameter of a mandrel capable of independently controlling the left and right so as to prevent the occurrence of a telescope by applying the same tension to the entire area of the strip .

A mandrel control device for a take-up machine according to an aspect of the present invention includes a first displacement sensor and a second displacement sensor for respectively measuring both side displacements of a strip wound on a mandrel of a take-up machine; A first diameter adjuster and a second diameter adjuster for independently adjusting the roll diameter of the plurality of mandrels; And a control unit for operating the first diameter adjusting unit and the second diameter adjusting unit so that the same tension is maintained on both sides of the strip based on the displacement difference of the displacement values inputted from the first displacement sensor and the second displacement sensor, And the sensor and the second displacement sensor are installed in a normal direction of a point where the strip first contacts the mandrel.

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According to another aspect of the present invention, there is provided a method of controlling a mandrel of a take-up machine, the method comprising: receiving a first displacement value and a second displacement value, the control unit measuring both side displacements of a strip wound on a mandrel of a take- Calculating a displacement difference between the input first displacement value and the input second displacement value; Calculating a diameter adjustment amount according to a displacement difference; And operating the first diameter adjusting unit and the second diameter adjusting unit according to the diameter adjusting amount, wherein the first displacement value and the second displacement value are displacement values measured in a normal direction of a point where the strip first contacts the mandrel .

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In the present invention, the diameter adjustment amount is an expansion amount and a reduction amount of the first diameter adjustment portion and the second diameter adjustment portion.

The present invention adjusts the roll diameter of mandrels capable of independently controlling the left and right so that the same tension is applied to the entire area of the strip, thereby preventing the occurrence of meandering of the strip and preventing the occurrence of the telescope, .

FIG. 1 is a block diagram showing a mandrel control device of a take-up machine according to an embodiment of the present invention.
2 is a view for explaining an installation position of a displacement sensor in a mandrel control device of a winder according to an embodiment of the present invention.
FIG. 3 is a view illustrating a diameter adjusting unit in a mandrel control apparatus of a winder according to an embodiment of the present invention.
4 is a flowchart illustrating a method for controlling a mandrel of a take-up machine according to an embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a mandrel control apparatus and method 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 block diagram illustrating a mandrel control apparatus for a winder according to an embodiment of the present invention. FIG. 2 illustrates an installation position of a displacement sensor in a mandrel control apparatus of a winder according to an embodiment of the present invention. FIG. 3 is a view illustrating a diameter adjusting unit in a mandrel control apparatus of a winder according to an embodiment of the present invention. Referring to FIG.

As shown in FIGS. 1 to 3, an apparatus for controlling mandrel of a winder according to an embodiment of the present invention includes a first displacement sensor 11, a second displacement sensor 12, a first diameter adjuster 31, 2 diameter adjusting section 32 and a control section 20. [

The first displacement sensor 11 and the second displacement sensor 12 measure the displacement on both sides of the strip 50 wound on the mandrel 45 as a laser displacement sensor.

That is, as shown in FIG. 2, when the strip 50 passing through the roughing mill 60 in the correcting line is wound on the winder 40, when the tension is changed in the strip 50, And if this state continues, the strip 50 is wound while being meandered to generate a telescope.

Therefore, the first displacement sensor 11 and the second displacement sensor 12 are installed in the normal direction of the point where the strip 50 first contacts the mandrel 45 in order to measure the spacing from the mandrel 45 desirable.

As shown in the enlarged view of FIG. 2, the strip is measured in the normal direction of the first point of contact with the mandrel so as to be able to measure the clearance between the mandrel 45 and the strip 50 most clearly, It is possible to accurately measure it.

The first diameter adjusting section 31 and the second diameter adjusting section 32 independently adjust the roll diameters of the plurality of separated mandrels 45. [

As shown in FIG. 3, when the piston 35 moves rightward and leftward in the mandrel 45, the roll diameter of the mandrel 45 is adjusted while being expanded or contracted along the inclined surface.

That is, as shown in (a), when the piston 35 moves inward, the roll diameter is reduced, and when the piston 35 moves outward as shown in (b), the roll diameter is expanded.

In this embodiment, since the mandrel 45 is divided into left and right portions, the roll diameter can be independently adjusted.

The control unit 20 calculates the diameter adjustment amount so that the same tension is maintained on both sides of the strip 50 based on the displacement difference of the displacement values inputted from the first displacement sensor 11 and the second displacement sensor 12, The first diameter adjusting unit 31 and the second diameter adjusting unit 32 are operated.

For example, assuming that the first displacement value is 200 mm and the second displacement value is 150 mm, the diameter adjustment amount to compensate for the displacement difference of 50 mm is calculated, and the first diameter adjustment section 31 and the second diameter adjustment section 32 So that the same tension can be maintained on both sides of the strip 50, and centering control can be performed to prevent meandering.

As described above, according to the mandrel control device of the winding machine according to the present invention, the displacement is measured on both sides of the strip wound on the mandrel through the displacement sensor to adjust the roll diameter of the mandrel capable of independently controlling the left and right, It is possible to prevent the occurrence of meandering of the strip and to prevent the occurrence of the telescope and to improve the windability.

4 is a flowchart illustrating a method for controlling a mandrel of a take-up machine according to an embodiment of the present invention.

4, the method of controlling a mandrel of a take-up machine according to an embodiment of the present invention includes the steps of: firstly, the control unit 20 controls the two side displacements of the strip 50 wound on the mandrel 45 of the take- The first displacement value and the second displacement value from the first displacement sensor 11 and the second displacement sensor 12 are measured (S10).

Here, the first displacement value and the second displacement value are displacement values measured in the normal direction of the point where the strip 50 contacts the mandrel 45 for the first time.

That is, as shown in FIG. 2, when the strip 50 passing through the roughing mill 60 in the correcting line is wound on the winder 40, when the tension is changed in the strip 50, And if this state continues, the strip 50 is wound while being meandered to generate a telescope.

Therefore, in order to sense this, the displacement is measured in the normal direction of the point where the strip 50 first contacts the mandrel 45.

The displacement difference is calculated for the first displacement value and the second displacement value measured from the first displacement sensor 11 and the second displacement sensor 12 (S20).

This displacement difference occurs as the strip 50 meanders while the tension applied to the strip 50 is changed and separated from the mandrel 45. [

Then, a diameter adjustment amount for removing the displacement difference is calculated (S30).

The diameter adjustment amount may be the amount of movement of the piston 35 as shown in FIG. 3 as an expansion amount and a reduction amount of the first diameter adjustment portion 31 and the second diameter adjustment portion 32.

Then, the first diameter adjusting unit 31 and the second diameter adjusting unit 32 are operated according to the diameter adjusting amount so that the same tension can be applied to the entire area (S40).

According to the method of controlling the mandrel of the winding machine according to the present invention, the roll diameter of the mandrel can be independently controlled on the basis of the displacement difference between the first displacement value and the second displacement value measured at both sides of the strip wound on the mandrel It is possible to prevent the occurrence of meandering of the strip and to prevent the occurrence of the telescope and to improve the winding-up property by adjusting the same tension to the entire area of the strip.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

11: first displacement sensor 12: second displacement sensor
20: control part 31: first diameter adjusting part
32: second diameter adjuster 35: piston
40: Winder 45: Mandrel
50: strip 60: temper rolling mill

Claims (5)

A first displacement sensor and a second displacement sensor for respectively measuring both side displacements of the strip wound on the mandrel of the winder;
A first diameter adjuster and a second diameter adjuster for independently adjusting the roll diameter of the plurality of mandrels; And
And a control unit for operating the first diameter adjusting unit and the second diameter adjusting unit such that the same tension is maintained on both sides of the strip based on the displacement difference of the displacement values inputted from the first displacement sensor and the second displacement sensor However,
Wherein the first displacement sensor and the second displacement sensor are installed in a normal direction of a point where the strip first contacts the mandrel.
delete Receiving a first displacement value and a second displacement value which are measured by the control unit on both sides of the strip wound on the mandrel of the take-up machine;
Calculating a displacement difference between the input first displacement value and the input second displacement value;
Calculating a diameter adjustment amount according to the displacement difference; And
And operating the first diameter adjusting unit and the second diameter adjusting unit according to the diameter adjusting amount,
Wherein the first displacement value and the second displacement value are displacement values measured in a normal direction of a point where the strip first contacts the mandrel.
delete The mandrel control method according to claim 3, wherein the diameter adjustment amount is an expansion amount and a reduction amount of the first diameter adjustment portion and the second diameter adjustment portion.

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