JPH0550122A - Thermal crown controller for rolling roll - Google Patents

Abstract

PURPOSE:To obtain a sharp thermal crown curve for a roll by cooling and heating the outer periphery of the rolling roll simultaneously. CONSTITUTION:A roll cooling mechanism 11 composed of a cooling jacket 21 provided with a cooling pad and a cooling liquid feeding source 28 is provided on the outer periphery of a rolling roll 13, a roll heating mechanism 12 provided with a steam nozzle is provided adjacently to mechanism 11 a cooling area 20 to prevent generation of the thermal crown is cooled by the roll cooling mechanism 11 and the adjacent part is heated by a roll heating mechanism 12 so that the effect of cooling does not propagate. In this way, limited local cooling can be attained and a sharp thermal crown curve B can be obtained by controlling the roll cooling mechanism 11 and the roll heating mechanism 12 by a controlling means 29.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal crown controller for controlling a thermal crown of a rolling roll, which is capable of obtaining a sharp thermal crown curve of a roll by simultaneously performing cooling and heating. Is.

[0002]

2. Description of the Related Art In a rolling mill for plate rolling, a rolling material is fed between a pair of upper and lower rolling rolls for rolling, and a spray nozzle is provided to prevent heating of the rolling rolls accompanying rolling, water, etc. The cooling liquid is sprayed for cooling. On the other hand, since the uniformity of the plate thickness in the width direction of the product obtained by rolling the plate is an important factor that determines the quality of the product quality, the heat that the center of the rolling roll swells when the rolling roll is heated during rolling. It is necessary to prevent the plate thickness from changing due to the crown. Further, when this hot crown is generated on the rolling roll, depending on its shape, when roll bending is performed on the rolling roll, composite elongation such as pocket wave (quarter buckle) is likely to occur on the plate.

Therefore, various measures have been proposed,
For example, when cooling a rolling roll, extra cooling liquid is applied to that portion to prevent the expansion amount of the rolling roll near the edge of the strip width from changing suddenly, or spot cooling is performed to apply a low temperature cooling liquid to that portion. I am trying.

[0004]

However, in the conventional method for controlling the thermal crown of the rolling roll by spot cooling, as shown in FIG. 4, for example, cooling jackets 2 and 3 arranged along the outer circumference of the rolling roll 1 are provided. The cooling liquid is supplied from the cooling liquid supply source 4 to only the portion surrounded by the cooling jackets 2 and 3 for cooling, but the influence of this spot cooling extends to a wide range of the rolling roll 1. For this reason, as indicated by a broken line A in FIG. 4, the thermal crown of the rolling roll 1 also changes over a wide range, and the roll crown other than the portion necessary for preventing the pocket wave also changes.

The present invention has been made in view of the problems of the prior art, and provides a rolling crown thermal crown control device capable of forming a sharp thermal crown on a rolling roll and controlling the thermal crown. It is the one we are trying to provide.

[0006]

In order to solve the problems of the above-mentioned prior art, a thermal crown controller for a rolling roll according to the present invention includes a cooling jacket installed so as to surround a cooling zone on the outer periphery of the rolling roll, Roll cooling is performed by a cooling pad that is provided in the cooling jacket and that forms a cooling liquid flow path between the rolling roll surface and the roll, and a cooling liquid supply source that supplies the cooling liquid into the cooling liquid flow path. While configuring the mechanism, a roll heating mechanism for heating the surface of the rolling roll is provided adjacent to this roll cooling mechanism, and a control means for controlling the thermal crown of the rolling roll by these roll cooling mechanism and roll heating mechanism is provided. It is a feature.

[0007]

According to this thermal crown controller for rolling rolls, a roll cooling mechanism composed of a cooling jacket, a cooling pad, and a cooling liquid supply source is provided on the outer periphery of the rolling roll, and at the same time, a roll heating mechanism is provided adjacently. In this way, the roll cooling mechanism cools the portion where the generation of the thermal crown is to be prevented, and the roll heating mechanism is used to heat the adjacent portion so that the influence is not spread. As a result, it becomes possible to perform local cooling that is extremely limited, and it becomes possible to obtain a sharp thermal crown curve by controlling the roll cooling mechanism and the roll heating mechanism by the control means.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. 1 to 3 relate to an embodiment of a thermal crown controller for a rolling roll of the present invention, FIG. 1 is an overall configuration diagram, FIG. 2 is a horizontal sectional view, and FIG. 3 is a vertical sectional view. The rolling crown thermal crown control device 10 includes a roll cooling mechanism 11 and a roll heating mechanism 12 adjacent to the roll cooling mechanism 11.

Since the roll cooling mechanism 11 and the roll heating mechanism 12 are located at the portion of the rolling roll 13, as shown in FIG.
As shown in FIG. 3, a gantry 14 is installed near the rolling roll 13, two rails 15 are mounted on the gantry 14 in parallel with the axial direction of the rolling roll 13, and a lateral moving table 16 is attached to the rail 15. Thus, the rolling roll 13 can be moved laterally in the axial direction. At the tip of the horizontal moving table 16, a direction of approaching and separating from the outer peripheral surface of the rolling roll 13 (see FIG.
A moving guide 17 is provided in the left-right direction of the paper) and a moving base 18 is mounted so as to be capable of reciprocating, and a rod of a drive cylinder 19 supported by a pin on the horizontal moving base 16 is connected by a pin to reciprocate. It has become so. Therefore, the moving table 18 can reciprocate with respect to the rolling roll 13 in the axial direction and the direction orthogonal thereto.

A roll cooling mechanism 11 and a roll heating mechanism 12 are mounted on the moving table 18.

As shown in FIGS. 2 and 3, the roll cooling mechanism 11 has a box-shaped cooling jacket 2 having an open tip so as to surround the cooling zone 20 on the outer circumference of the rolling roll 13.
1, for example, two are provided, the opening portion is formed into an arc shape along the outer circumference of the rolling roll 13, and the elastic cushion 22 is attached around the tip end portion.

Inside the cooling jacket 21, the tip is an arcuate surface along the outer circumference of the rolling roll 13, and a gap is formed between the rolling roll 13 and the upper and lower sides of the cooling jacket 21 to form a cooling liquid passage 23. The cooling pad 24 that forms the cooling pad 24 is attached to the left and right walls of the cooling jacket 21 and the cooling pad 24.
A spacer 25 is attached between and. Further, a rod of a space adjusting cylinder 26 attached to the rear surface of the cooling jacket 21 is connected to the back of the cooling pad 24,
The cooling pad 24 is moved with respect to the positioned cooling jacket 21, and the surface of the rolling roll 13 and the cooling pad 24 are moved.
The size of the cooling liquid flow path 23 can be adjusted by adjusting the gap between And this cooling jacket 21
In order to supply or discharge the cooling liquid inside, as shown in FIG. 1, a cooling liquid supply / discharge port 27 is formed in the cooling jacket 21, and the cooling liquid is supplied from the cooling liquid supply source 28. There is. Further, the roll cooling mechanism 11 is provided with a control means 29 for controlling the cooling of the rolling rolls 13,
The thermal crown can be adjusted. Therefore, the cooling liquid supplied from the cooling liquid supply source 28 is rolled in the upper and lower gaps between the cooling jacket 21 and the cooling pad 24 and the gap between the surface of the rolling roll 13 and the tip end face of the cooling pad 24 as the cooling liquid passage 23. Cooling area 2 on the outer peripheral surface of the roll 13
0 can be cooled.

Next, in the roll heating mechanism 12 provided adjacent to the roll cooling mechanism 11, as shown in FIG. 2, the vapor nozzles 30 are provided in the spacers 25 on both sides of the cooling pad 24 in the cooling jacket 21. Be done. A seal material 31 for preventing the coolant from leaking laterally is attached to the tip of the spacer 25, and a steam nozzle 30 is formed on the outer portion of the seal material 31, which is slightly above the surface of the rolling roll 13. They are facing each other with a gap. A heating fluid channel 32 is formed in the spacer 25 to supply heating steam to the steam nozzle 30.

As shown in FIG. 1, heating fluid is supplied from the heating fluid supply source 33 to the heating fluid passage 32 through a supply port communicating with the heating steam through the cooling jacket 21. ing. And this roll heating mechanism 12
Also, the control means 29 is connected to the control means 29 so that the heating amount can be controlled. Therefore, when steam is supplied from the heating fluid supply source 33 with the cooling jacket 21 installed in the cooling zone 20 to be cooled on the outer circumference of the rolling roll 13,
The part of the rolling roll 13 adjacent to the cooling zone 20 is heated by the steam blown out from the steam nozzle 30. Thereby, the influence of the cooling by the roll cooling mechanism 11 can be limited to a very limited portion, and the control means 2
As shown by the broken line B in FIG.
Can be a thermal crown.

In this embodiment, steam is used as the heating source of the roll heating mechanism to prevent the risk of ignition due to heating of the oil cooling liquid used in the rolling of aluminum. However, the present invention is not limited to this, and it is also possible to use electricity as a heating source and heat with an electric heater or provide an induction heating coil for heating. Further, in this embodiment, the vapor nozzle of the roll heating mechanism is formed on the spacer in the cooling jacket to have an integral structure with the roll cooling mechanism, but the invention is not limited to this, and may be installed separately. Further, it goes without saying that each constituent element may be changed without departing from the scope of the present invention.

[0016]

According to the thermal crown controller for a rolling roll of the present invention as specifically described above with reference to one embodiment, a cooling jacket, a cooling pad, and a cooling liquid supply source are provided on the outer periphery of the rolling roll. Since the roll cooling mechanism is provided at the same time as the roll heating mechanism is provided adjacent to the roll cooling mechanism, it is possible to cool the portion where the heat crown is prevented from being generated by the roll cooling mechanism, and the roll cooling mechanism is adjacent to the portion to be cooled. The part can be heated using a roll heating mechanism,
The influence of cooling can be made extremely narrow. Therefore, it becomes possible to perform local cooling to a very limited extent, and a sharp thermal crown curve can be obtained by controlling the roll cooling mechanism and the roll heating mechanism by the control means.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram according to an embodiment of a thermal crown control device for a rolling roll of the present invention.

FIG. 2 is a horizontal sectional view according to an embodiment of a thermal crown control device for a rolling roll of the present invention.

FIG. 3 is a vertical sectional view according to an embodiment of a thermal crown control device for a rolling roll of the present invention.

FIG. 4 is a schematic configuration diagram of a conventional roll cooling device.

[Explanation of symbols]

 10 Roll Crown Thermal Crown Control Device 11 Roll Cooling Mechanism 12 Roll Heating Mechanism 13 Rolling Roll 20 Cooling Area 21 Cooling Jacket 23 Cooling Liquid Flow Path 24 Cooling Pad 25 Spacer 26 Interval Adjusting Cylinder 28 Cooling Liquid Supply Source 29 Controlling Means 30 Steam Nozzle 32 Heating fluid flow path 33 Heating fluid supply source A, B Thermal crown of rolling roll

Claims (1)

[Claims] 1. A cooling jacket which is installed so as to surround a cooling zone on the outer periphery of a rolling roll, and a cooling which is provided in the cooling jacket and forms a cooling liquid flow path between the surface of the rolling roll and an adjustable gap. A pad and a cooling liquid supply source that supplies the cooling liquid into the cooling liquid flow path constitute a roll cooling mechanism, while a roll heating mechanism that heats the surface of the rolling roll is provided adjacent to the roll cooling mechanism. A thermal crown control device for a rolling roll, comprising a control means for controlling the thermal crown of the rolling roll by a roll cooling mechanism and a roll heating mechanism.