KR20000010065U - Hot rolled skin pass roll heater - Google Patents

Abstract

The present invention relates to a hot rolled skin pass roll heater device capable of correcting the flatness of the strip by applying heat to the upper roll when the strip is rolled, and thus using thermal expansion. The bending is provided between the upper roll and the lower roll. In the hot rolled skin pass roll heater device for passing the strip having a pass, and correcting the flatness of the strip by a rolling mill while heating the upper roll, the support shaft portion 100 is coupled to the inner surface of the rolling mill 24, and the support It is configured to include a base portion 200 coupled to the shaft portion 100 to move back and forth, and a heating portion 300 for generating heat by the advance of the base portion 200 to heat the upper roll (10). .

By the configuration and operation of the present invention, without the inconvenience of using the conventional LPG device by heating the upper roll to adjust the necessary roll crown to correct the flatness of the bending strip passing between the upper and lower rolls The effect of producing a product is provided.

Description

Hot rolled skin pass roll heater

The present invention relates to a hot rolled skin pass roll heater device, and more particularly, to a hot rolled skin pass roll heater device capable of correcting flatness of a strip by applying heat to an upper roll when the strip is rolled, and thereby using thermal expansion. .

In general, the upper and lower rolls of hot rolled skin pass have a roll crown of +15/100 to 18/100 mm since the expansion of the roll varies according to the ambient temperature (5 to 40 ° C) depending on the season when the roll is polished. However, since the temperature is different for each roll when the ambient temperature is changed and the roll is polished, it is difficult to maintain the proper roll crown, and it is difficult to precisely manage the roll crown of 1/100 mm or less. .

If rolling pressure is less than proper when rolling with an improper roll crown, the flatness correction is not good during strip rolling. On the contrary, when rolling pressure is higher than appropriate, rolling mills are stiff in the longitudinal direction of the rolled strip. Occurs) and rolls wear prematurely, which causes problems with deterioration in quality and productivity.

Roll Crown

R.C. = c-a + b / 2

↕a ↕c b↕

In other words, the larger the expansion amount of the center portion (c) of the roll, the higher the roll crown, and the lower the roll crown, the larger the expansion amount of the side portions (a, b) of the roll.

1 is a perspective view showing a conventional hot rolled skin pass roll equipment, FIG. 2 is a configuration diagram of a conventional hot rolled skin pass roll heater device, and FIG. 3 is an installation diagram of a conventional hot rolled skin pass roll heater device. The flatness is corrected by the rolling mill 24 while passing through the curved strips 22 between the 20, and the upper roll 10 is provided with a gas burner 12, LPG reservoir 14 Open the valve of the valve) and open the valve of the valve assembly device 16 to ignite the gas burner 12 to heat it, which is inconvenient to open and close the valve every time it is used together with the risk of explosion or fire caused by gas leakage. There was a problem of avoiding its use due to problems such as LPG storage 14 management, and reference numeral 26 in the drawings is an operation panel.

The present invention has been made in order to solve the above problems, it is to provide a hot rolled skin pass roll heater apparatus that can produce a high-quality product by improving the flatness of the strip roll by adjusting to the required roll crown It is done.

1 is a perspective view showing a conventional hot rolled skin pass roll equipment,

2 is a configuration diagram of a conventional hot rolled skin pass roll heater device;

3 is an installation diagram of a conventional hot rolled skin pass roll heater device;

4 is an installation state of the hot rolled skin pass roll heater device according to the present invention,

5 is a perspective view showing a hot rolled skin pass roll heater device according to the present invention;

6 is a plan view and a front view of a hot rolled skin pass roll heater device according to the present invention;

7 is a detailed view of the heating unit in the present invention.

<Description of the code | symbol about the principal part of drawing>

10: upper roll, 20: lower roll, 22: strip, 24: rolling mill, 100: support shaft portion, 110: support shaft, 200: base portion, 210: base, 250, 324: limit switch, 300: heating portion, 320: heater , 322: fan motor, 326: temperature sensor

In the hot rolled skin pass roll heater apparatus for correcting the flatness of the strip by a rolling mill while passing through the strip between the upper roll and the lower roll to achieve the above object, and heating the upper roll, Hot rolled skin pass roll heater device comprising a support shaft portion coupled to an inner surface of a rolling mill, a base portion coupled to the support shaft portion to move back and forth, and a heating portion generating heat by advancing the base portion to heat the upper roll. Is provided.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Figure 4 is an installation state of the hot rolled skin pass roll heater device according to the present invention, Figure 5 is a perspective view showing a hot rolled skin pass roll heater device according to the present invention, Figure 6 is a hot rolled skin pass roll heater device according to the present invention Top view and front view.

In addition, Figure 7 is a detailed view of the heating unit in the present invention, the same reference numerals are given to the same parts as the conventional drawings in the present invention, the hot rolled skin pass roll heater apparatus according to the present invention between the upper roll and the lower roll In the hot rolled skin pass roll heater device for passing the strip having the curvature through, and the flatness of the strip by a rolling mill while heating the upper roll, the support shaft portion 100 is coupled to the inner surface of the rolling mill 24 And a base part 200 coupled to the support shaft part 100 to move back and forth, and a heating part 300 generating heat by advancing the base part 200 to heat the upper roll 10. It is configured to include.

The support shaft portion 100 includes a support shaft 110 whose left and right ends thereof are coupled to the rolling mill 24, a connection bracket 120 coupled to the support shaft 110 to rotate back and forth, and a cylinder rod 132 at the front end thereof. ) Is composed of a cylinder 130 attached to an outer surface of the connection bracket 120.

At this time, the connection bar 122 is attached to the inner surface of the connection bracket 120 is fixed to both sides of the base 210 of the base portion 200.

The cylinder 130 is attached to the inner surface of the rolling mill 24 through the support plate 134, and is operated by a driving device (not shown) to move the cylinder rod 132 back and forth.

The base part 200 is provided with a motor 220 and a drive shaft 230 on an upper portion of the base 210 to which the limit switch 250 is attached at a central portion thereof, and a bevel gear 232 on the drive shaft 230. Is attached, the bevel gear 232 is connected to the screw shaft 240 installed in a direction perpendicular to the drive shaft 230.

The screw nut 242 is fastened to the screw shaft 240, and the screw nut 242 is attached to the bottom of the heater fixing part 310 of the heating part 300 by welding.

The heating unit 300 has a heater 320 attached to the upper portion of the heater fixing unit 310, the limit switch 324 is attached to both ends of the heater 320.

The motor 220 and the limit switches 250 and 324 are electrically connected to each other.

The heater 320 is preferably manufactured to be equal to the circumference of the upper roll 10 (for example, having R 430 mm) in order to effectively transfer heat, and to the operating panel 26 so that each can be operated separately. The switch is installed.

The fan motor 322 is installed on the rear surface of the heater 320, and when the temperature is higher than a predetermined temperature by the temperature sensor 326, the fan motor 322 is operated to effectively transfer heat to the upper roll 10. It is.

The heating wire 320a is built in the heater 320, and the heating wire 320a is fixed by the heating wire support 320b and the heating wire support net 320c, and the outer shell 320d is heated by the heat insulator 320e. The heat reflection mirror 320f is provided inside the heat insulating material 320e to prevent loss.

Hereinafter, the operation of the present invention having the configuration as described above.

Select the heater 320 to power on the control panel 26 (e.g., a central heater that emits heat to the center of the roll when the roll crown is to be raised, i.e. 320b, c, d or 320c, When lowering, the switch is operated by a side heater ie 320a, e) that radiates heat to both sides of the roll.

Subsequently, when the cylinder 130 is operated through the driving device, the base 210 is moved forward by the advance of the cylinder rod 132 and the connection bracket 120 and the connection bar 122, and the motor 220 is moved. By rotating the drive shaft 230 and the bevel gear 232 by the forward rotation, the screw nut 242 connected to the screw shaft 240 is moved in all directions while the heater fixture 310 fixed to the screw nut 242 ) Also moves forward.

At this time, when the limit switch 324 detects the upper roll 10 and the contact is converted, the operation of the motor 220 is stopped and heat is generated while power is supplied to the selected heater 320, and a predetermined temperature or more is sensed. When the fan motor 322 is blown by the temperature sensor 326 to heat the upper roll (10).

The strip 22 is flattened by the thermally expanded upper roll 10 as it passes through the strip 22 having the bent portion between the heated upper roll 10 and the lower roll 20.

On the other hand, after the calibration operation of the strip 22 is completed, when the cylinder 130 is operated when the heater 320 is to be returned to its original position, the base 210 is moved backward by the backward of the cylinder rod 132, and the As the motor 220 reversely rotates, the screw nut 242 moves backward by the rotation of the driving shaft 230 and the bevel gear 232, and the heater holder 310 also moves to the rear side.

At this time, as the limit switch 324 detects the tip of the heater fixing unit 310 and the contact thereof is converted, the operation of the motor 220 is stopped and the heater 320 is positioned at the original position.

As described above, according to the present invention, by heating the upper roll to adjust the required roll crown without the risk or inconvenience caused by the use of the conventional LPG device to correct the flatness of the bending strip passing between the upper and lower rolls It is effective to produce quality products.

Although the technical idea of the hot rolled skin pass roll heater device according to the present invention has been described with the accompanying drawings, this is illustrative of the best embodiment of the present invention and is not intended to limit the present invention.

In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

Claims (1)

In the hot rolled skin pass roll heater device for passing the strip having the curvature through the upper roll and the lower roll, and the flatness of the strip by a rolling mill while heating the upper roll, Support shaft portion 100 is coupled to the inner surface of the rolling mill 24, A base portion 200 coupled to the support shaft portion 100 and moving back and forth, Hot rolled skin pass roll heater device characterized in that it comprises a heating unit 300 for generating heat by the advance of the base portion 200 to heat the upper roll (10).