KR-20260066338-A - roll crown control apparatus

KR20260066338AKR 20260066338 AKR20260066338 AKR 20260066338AKR-20260066338-A

Abstract

The present invention provides a roll crown adjustment device comprising: a heating unit disposed outside the hearth roll and heating the center portion in the width direction of the hearth roll; and a cooling unit disposed outside the hearth roll and cooling the edge portions on both sides in the width direction of the hearth roll.

Inventors

박재성

Assignees

주식회사 포스코

Dates

Publication Date: 20260512
Application Date: 20241104

Claims (12)

A heating unit disposed outside the hearth roll and heating the center portion in the width direction of the hearth roll; and A roll crown adjustment device comprising: a cooling unit disposed outside the hearth roll and cooling both edge portions in the width direction of the hearth roll.
In paragraph 1, A temperature measuring unit for measuring the temperature distribution in the width direction of the above-mentioned hearth roll: and A roll crown control device comprising: a control unit that measures the roll crown of the hearth roll based on width-direction temperature information provided by the temperature measuring unit, and controls the heating unit and the cooling unit based on the roll crown information.
In paragraph 2, A roll crown adjustment device further comprising: a plurality of distance measuring units installed spaced apart in the width direction of the above-mentioned hearth roll and positioned on the outer side of the above-mentioned hearth roll to measure the distance to the above-mentioned hearth roll.
In paragraph 1, the heating unit is, A heat radiation tube extending in the width direction along the center portion and disposed around the center portion; and A roll crown adjustment device comprising: a heater member disposed inside the heat radiation tube and heating the heat radiation tube.
In paragraph 1, A roll crown control device further comprising: a section heating unit disposed outside the hearth roll, extended along the width direction of the hearth roll, and having a plurality of individually controllable heating sections along the width direction of the hearth roll.
In paragraph 5, The above section heating unit is a roll crown adjustment device installed across a portion of the center portion of the hearth roll and an edge portion close to the center portion.
In paragraph 5, the section heating unit is, A heat radiating tube extending in the width direction along the above hearth roll and disposed around the hearth roll; A partitioning member that divides the interior of the above-mentioned heat radiation tube into a plurality of heating sections; and A roll crown control device comprising: a heater member disposed inside the heat radiation tube to heat a plurality of heating sections and capable of individual temperature control for each heating section.
In Paragraph 7, The above section heating unit is arranged extending along the width direction of the hearth roll and is installed in multiple rows along the circumference direction of the hearth roll, and The above-mentioned section heating unit of multiple rows is a roll crown control device in which the heating sections are arranged staggered from each other.
In paragraph 1, the cooling unit is, A cooling roll that contacts the above hearth roll and cools the above hearth roll; A movable block installed so as to be movable toward the hearth roll, on which the cooling roll is installed; and A roll crown adjustment device comprising: a moving member that moves the above-mentioned moving block toward the above-mentioned hearth roll.
In Paragraph 9, In the above-mentioned movable block, a plurality of cooling rolls are installed spaced apart along the width direction of the above-mentioned hearth roll to form a cooling roll line, and The above cooling roller lines are installed in multiple rows along the circumferential direction of the above hearth roll, and The above-mentioned cooling roller line of multiple rows is a roll crown adjustment device in which the cooling rollers are arranged staggeredly.
In Clause 9, the above-mentioned movable block is, A movable block body that moves toward the hearth roll by the above-mentioned movable member; A cooling roll groove formed within the above-mentioned movable block body and into which the cooling roll is inserted; and A roll crown adjustment device comprising: a cushioning spring that is received at the lower side of the cooling roll groove and elastically supports the lower side of the cooling roll.
In claim 9, the above cooling unit is, A roll crown adjustment device further comprising: a support block having a block lifting groove in which the movable block is raised and lowered, and wherein the movable member is disposed on the lower side of the block lifting groove.

Description

Roll crown control apparatus The present invention relates to a roll crown adjustment device. It should be noted that the content described in this section merely provides background information regarding the present invention and does not constitute prior art. To prevent the strip from meandering inside the annealing furnace, a hearth roll with a certain level of roll crown is installed to pass the strip through. A Roll Crown refers to the difference between the diameter of the center portion of a hearth roll and the diameter of the edge portion of the hearth roll. When the diameter of the center portion is larger, it is called a Regular Crown, and when the diameter of the edge portion is larger, it is called a Reverse Crown. As shown in the upper drawing of FIG. 1, if the hearth roll (R) has a regular crown (C1), a centering force is applied to move the strip (S) to the center portion of the hearth roll during passage, thereby preventing the strip from going astray. As shown in the middle drawing of Fig. 1, when a reverse crown (C2) occurs on the hearth roll (R), the centering force disappears and the force may be applied towards the edge portion of the hearth roll (R). As shown in the lower drawing of Fig. 1, in this state, if a disturbance such as a strip edge wave occurs, meandering occurs in the strip (S). As such, if meandering occurs in the strip (S), the risk of the strip rolling out increases, and as the amount of rollout increases, there is a problem that production failure may occur as the strip and the annealing furnace wall interfere with each other, causing the strip to tear and break. Referring to FIG. 2, conventionally, a steering device (T), such as a CPC (Center Position Controller), was used to send the strip to the center portion when a skew occurred. That is, the amount of skew of the strip was detected, and a steering cylinder (not shown) of the steering device (T) was operated, and the skew of the strip was controlled when the heart roll (R) moved by the steering cylinder and the skewed strip was moved to the center portion. The upper drawing of FIG. 1 illustrates a state in which a centering force acts on the center portion of the hearth roll when a normal crown is formed on the hearth roll, the middle drawing of FIG. 2 illustrates a state in which the centering force disappears as a reverse crown occurs on the hearth roll, and the lower drawing of FIG. 2 illustrates a state in which meandering occurs in the strip as the centering force disappears. Figure 2 is a diagram illustrating a method in which a conventional roll crown adjustment device controls the meandering of a strip. FIG. 3a is a cross-sectional view of an actual hearth roll in which the roll crown adjustment device of the present invention is installed. FIG. 3b is a conceptual diagram of a hearth roll in which the difference in diameter between the center and edge portions of the hearth roll is exaggerated to clearly distinguish between the center and edge portions of the hearth roll. FIG. 4 is a front view of a roll crown adjustment device according to one embodiment of the present invention. Fig. 5 is a side view of the roll crown adjuster of Fig. 4. Figure 6 is a drawing illustrating the components of a heating unit included in the roll crown control device of Figure 4. Figure 7 is a drawing illustrating the components of a section heating unit included in the roll crown control device of Figure 4. FIG. 8 is a perspective view illustrating a cooling unit included in the roll crown adjustment device of FIG. 4. FIG. 9 is a cross-sectional view illustrating the details of the cooling unit of FIG. 8. Preferred embodiments of the present invention will be described below with reference to the attached drawings. However, embodiments of the present invention may be modified in various different forms, and the scope of the present invention is not limited to the embodiments described below. Furthermore, embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. In the drawings, the shapes and sizes of elements may be exaggerated for clearer explanation. In describing the embodiments of the present invention, if it is determined that a detailed description of known technology related to the present invention may unnecessarily obscure the essence of the present invention, such detailed description will be omitted. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intentions or conventions of the user or operator. Therefore, such definitions should be based on the content throughout this specification. The terms used in the detailed description are merely for describing the embodiments of the present invention and should not be limited in any way. Unless explicitly stated otherwise, expressions in the singular form include the meaning of the plural form. In this description,