KR101028118B1 - Roll forming device and roll forming method - Google Patents

Abstract

The present invention is a wheel mold casting part in which the wheel mold is cooled while continuously casting an aluminum alloy cast in a rotating wheel mold; A transfer unit for transferring the aluminum alloy slab; A reheating unit for heating the transferred aluminum alloy slab again; A plate-shape rolling unit for forming the aluminum alloy slab into a plate having a predetermined thickness; And a roll forming unit which deforms a cross-sectional shape of the aluminum alloy sheet material and processes the cross-sectional shape into a square material. The roll forming apparatus and the roll forming method as described above are provided with a plate that is directly rolled while being continuously cast to implement a continuous process of forming a roll to secure high product yield, and to save energy and reduce process costs.

Roll Forming, Sheet Shape Rolling Part, Shape Rolling Roll, Pinch Roll

Description

ROLL FORMING DEVICE AND ROLL FORMING METHOD}

TECHNICAL FIELD The present invention relates to a roll forming apparatus and a roll forming method, and more particularly, to a roll forming apparatus and a roll forming method for roll forming a continuously cast aluminum alloy by continuous multi-stage rolling.

The conventional aluminum sheet roll forming apparatus and roll forming method simultaneously perform multi-stage roll forming and contour forming to easily form a coil-shaped aluminum sheet having a constant width into a complicated shape such as an aircraft body and an automobile chassis. Because of this, even if the product of a complex shape, the work was continuously performed to contribute to the cost savings due to the reduction of the operator, it was possible to improve the precision by forming by the roll.

Korean Patent Application No. 10-2004-0044835 "Roll-Bending Molding Apparatus and Forming Method for Curved Forming of Aluminum Alloy" enables to reduce the number of operations by shaping the cross section and contour of the material in a consistent continuous apparatus. Application No. 10-2005-0113783 "Roll forming apparatus" is to roll forming by adjusting the top and bottom, left and right dimensions of the roll, without changing the roll or stand when the thickness and width of the same shape when the molding is different Made it possible.

However, the conventional roll forming apparatus and the roll forming method as described above, when using the rolled aluminum alloy sheet material as the raw material, the complex and intermittent processes such as slab casting heat treatment, hot and cold rolling required to make the rolled material, etc. Going through. Due to this, the cost is increased, there is a problem that the price of the final product by the roll forming also increases.

An object of the present invention is to provide a roll forming apparatus and a roll forming method, which are provided with a plate that is directly rolled while being continuously cast to enable roll forming.

In addition, the present invention is to provide a roll forming apparatus and a roll forming method that can ensure a high product yield from the raw material to the final product.

It is another object of the present invention to provide a roll forming apparatus and a roll forming method that save energy and reduce process costs due to a continuous process started from melting and casting.

The present invention is a wheel mold casting part in which the wheel mold is cooled while continuously casting an aluminum alloy cast in a rotating wheel mold; A transfer unit for transferring the aluminum alloy slab; A reheating unit for heating the transferred aluminum alloy slab again; A plate-shape rolling unit for forming the aluminum alloy slab into a plate having a predetermined thickness; And a roll forming unit which deforms a cross-sectional shape of the aluminum alloy sheet material and processes the cross-sectional shape into a square material.

In addition, the roll forming unit, the shape rolling roll for modifying the cross-sectional shape by adjusting the cross-section and volume of the aluminum alloy sheet material; A circular rolling roll for forming the aluminum alloy sheet material into an aluminum alloy square member in a cross-sectional shape deformed by the shape rolling roll; A surface control roll controlling a surface of the aluminum alloy shell to reduce a curvature error; And it discloses a roll forming apparatus comprising a pinch roll for loading the aluminum alloy shell by controlling the feed rate of the aluminum alloy shell.

In addition, the circular rolling roll and the pinch roll further includes a reducer, the reducer discloses a roll forming apparatus, characterized in that for controlling the rolling speed of the aluminum alloy.

In addition, the sheet-shape rolling unit discloses a roll forming apparatus, characterized in that by arranging three to four rolling rolls in succession, gradually reducing the thickness of the aluminum alloy sheet material.

In addition, the aluminum alloy slab may be heated up to about 400 degrees by the reheater in case of 5000 series, and may be heated to about 450 to 500 degrees by the reheater in case of 6000 series. Start the device.

The present invention provides a roll forming method, comprising: continuously casting an aluminum alloy slab in a rotating wheel mold, and cooling the wheel mold; The aluminum alloy slab is transferred and heated again; Forming the heated aluminum alloy slab into a plate having a predetermined thickness by a plate shape-providing rolling unit; Deforming the cross-sectional shape of the aluminum alloy sheet by a shape rolling roll; Forming an aluminum alloy sheet by a circular rolling roll into a rectangular shaped cross section; Controlling the surface of the aluminum alloy shell to reduce a curvature error; And it discloses a roll forming method, characterized in that the aluminum alloy formed by the pinch roll is reduced by the feed rate is loaded.

The roll forming apparatus and the roll forming method according to the present invention include a wheel mold casting part, a conveying part, a reheating part, a sheet shape applying rolling part, and a roll forming part, and after continuously casting an aluminum alloy slab, the plate is immediately rolled and the deformed cross-sectional shape. It is possible to form a shell having a. This consistent, continuous process results in high product yields and energy savings and process cost savings to improve the price competitiveness of the final product.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

FIG. 1 is a view illustrating a wheel mold casting part 101, a conveying part 102, a reheating part 103, and a sheet shape applying rolling part 104 in a roll forming apparatus 100 according to the present invention, and FIG. 2. It is a figure which shows the roll forming part 105 arrange | positioned after the board | substrate shape provision rolling part 104 of 1. As shown in Figures 1 and 2, the roll forming apparatus 100 according to the present invention is the wheel mold casting portion 101, the conveying portion 102, the reheating portion 103, the plate-shape rolling unit 104 and And a roll forming unit 105.

The wheel mold casting part 101 continuously casts aluminum alloy slabs. Specifically, the continuous casting of the aluminum alloy cast is made in a rotating wheel mold. At this time, the wheel mold is cooled by the coolant. As a result, the aluminum alloy slabs having medium / high strength are cast.

The conveying part 102 is used to convey the continuously cast aluminum alloy slab in the roll forming apparatus 100.

The reheating unit 103 heats the aluminum alloy slab again. At this time, the aluminum alloy slab is reheated to an optimal rolling temperature. On the other hand, aluminum alloys have different optimum rolling temperatures depending on their kind. For example, the 5000 series aluminum alloy is about 400 degrees and the 6000 series aluminum alloy is about 450 degrees to 500 degrees. Therefore, the reheating unit 103 is designed to reheat 5000 series aluminum alloy slats to about 400 degrees and 6000 series aluminum alloy slats to about 450 degrees to 500 degrees. The aluminum alloy slab heated again by the reheating unit 103 may be easily rolled.

The plate shape-providing rolling part 104 forms the said aluminum alloy slab by the board material of fixed thickness. The aluminum alloy slab is formed of a plate by reducing the cross section through a rolling roll consisting of two stages. On the other hand, when the aluminum alloy sheet material reaches the thickness to be obtained at once, the aluminum alloy sheet material may be broken. Therefore, the plate-shape rolling unit 104 is a form in which two to four rolling rolls are continuously arranged in three to four pieces, and gradually reduce the thickness of the aluminum alloy plate. Generally, the aluminum alloy sheet is rolled to a thickness of about 0.5 mm through the sheet shape imparting rolling section 104.

The roll forming portion 105 is arranged next to the sheet shape imparting rolling portion 104 to be used to process the aluminum alloy sheet into a square material, and to deform the cross-sectional shape of the aluminum alloy sheet. As shown in FIG. 2, the roll forming part 105 includes a shape rolling roll 151, a circular rolling roll 153, a surface control roll 155, a pinch roll 157, and reducers 158 and 159. do. In addition, the aluminum alloy sheet material is processed into the aluminum alloy square material having a cross-sectional shape close to the cross-sectional shape to be obtained by the roll forming unit 105.

The shape rolling roll 151 deforms the cross-sectional shape by adjusting the cross section and the volume of the aluminum alloy plate formed through the plate shape imparting rolling section 104. At this time, the shape rolling roll 151 is a rolling roll having a cross-sectional shape to be deformed. The aluminum alloy sheet is transformed into a cross-sectional shape such as "U", "C" and "H" through the shape rolling roll 151.

The circular rolling roll 153 forms the aluminum alloy sheet material in an aluminum alloy square in a cross-sectional shape deformed by the shape rolling roll 151. Accordingly, the aluminum alloy shell is formed into a cross-sectional shape such as, for example, "U", "C" and "H" characters.

The surface control roll 155 controls the surface of the aluminum alloy shell. That is, the surface of the aluminum alloy square formed by the circular rolling roll 153 is uneven and is even by the surface control roll 155. In addition, the curvature error of the surface of the aluminum alloy shell material is also reduced.

Pinch roll 157 is used to load the aluminum alloy shell having a modified cross-sectional shape to be obtained. The pinch roll 157 receives the driving force of the motor to control the transfer of the aluminum alloy shell. Specifically, the pinch roll 157 reduces the feed speed of the aluminum alloy shell to transfer the aluminum alloy shell to the end of the roll forming apparatus 100. Transfer it and load it.

The reduction gears 158 and 159 are combined with the circular rolling roll 153 and the pinch roll 157, respectively, to control the rolling speed of the aluminum alloy pieces.

3 is a flowchart illustrating a roll forming method according to the present invention. As shown in FIG. 3, the roll forming method of the present invention is performed through seven steps. In the meantime, the components used in the roll forming method use the reference numerals of the components of the roll forming apparatus 100 of FIGS. 1 and 2.

First, the continuous casting step S1 of the aluminum alloy cast is made. In step S1, the aluminum alloy cast is continuously cast in a rotating wheel mold, which is cooled by coolant.

Subsequent to step S1, a step of transferring and reheating the aluminum alloy slab (S2) is performed. The aluminum alloy slab continuously cast in step S2 is transferred and heated again. At this time, the heating temperature of the aluminum alloy cast is heated to the optimal rolling temperature.

Subsequent to step S2, the step S3 of forming the plate into the plate member by the plate shape-providing rolling section 104 of the aluminum alloy slab is performed. The aluminum alloy slab is formed into a plate through three to four times through the plate shape-providing rolling section 104, the thickness thereof is sequentially reduced.

Subsequent to the step S3, the cross-sectional shape deformation step S4 of the aluminum alloy sheet material by the shape rolling roll 151 is performed. In the step S4, the aluminum alloy sheet is deformed into a cross-sectional shape, for example, "U", "C" and "H".

Subsequently to step S4, a step S5 of forming an aluminum alloy sheet having a modified cross-sectional shape of the aluminum alloy sheet by the circular rolling roll 153 is performed. In step S5, the aluminum alloy shell having a deformed shape, for example, a cross-sectional shape such as "U", "C" and "H", is formed. In addition, the circular rolling roll 153 is combined with the reducer 159 for controlling the feed rate of the aluminum alloy square material to form the aluminum alloy square material at a stable speed.

Subsequent to step S5, the curvature error reduction step S6 of the aluminum alloy square material by the surface control roll 155 is performed. In step S6 the surface of the aluminum alloy shell is even.

Subsequent to step S6, the feed rate reduction and loading step (S7) by the pinch roll 157 of the aluminum alloy shell. The aluminum alloy material formed in step S7 is loaded using a pinch roll 157. At this time, the pinch roll 157 is implemented in combination with the reducer 159.

While the present invention has been described in connection with certain exemplary embodiments, it will be understood by those skilled in the art that various changes may be made without departing from the scope of the present invention.

1 is a view showing a wheel mold casting part, a conveying part, a reheating part and a sheet shape imparting rolling part in a roll forming apparatus according to a preferred embodiment of the present invention.

It is a figure which shows the roll forming part arrange | positioned following the plate-shaped provision rolling part of the roll forming apparatus of FIG.

3 is a flowchart illustrating a roll forming method according to a preferred embodiment of the present invention.

Claims (7)

A wheel mold casting part in which the wheel mold is cooled while continuously casting an aluminum alloy slab in a rotating wheel mold; A transfer unit for transferring the aluminum alloy slab; A reheating unit for heating the transferred aluminum alloy slab again; A plate-shape rolling unit for forming the aluminum alloy slab into a plate having a predetermined thickness; And It includes a roll forming unit for modifying the cross-sectional shape of the aluminum alloy sheet material to be processed into a square material, The roll forming unit, A shape rolling roll for modifying the cross-sectional shape by adjusting the cross-section and volume of the aluminum alloy plate; A circular rolling roll for forming the aluminum alloy sheet material into an aluminum alloy square member in a cross-sectional shape deformed by the shape rolling roll; A surface control roll controlling a surface of the aluminum alloy shell to reduce a curvature error; And Roll forming apparatus comprising a pinch roll for controlling the feed rate of the aluminum alloy shell material to load the aluminum alloy shell material. delete The method of claim 1, The circular rolling roll and the pinch roll further includes a reducer, The speed reducer is a roll forming apparatus, characterized in that for controlling the rolling speed of the aluminum alloy. The method of claim 1, And said plate shape imparting rolling portion continuously arranges three to four rolling rolls to gradually reduce the thickness of said aluminum alloy sheet material. The method of claim 1, The aluminum alloy slab may be heated to 400 degrees by the reheater in the case of 5000 series, it may be heated to 450 to 500 degrees by the reheater in the case of 6000 series. In the roll forming method, Continuous casting of the aluminum alloy cast in the rotating wheel mold, the wheel mold is cooled (S1); The aluminum alloy slab is transferred and heated again (S2); A step (S3) in which the heated aluminum alloy slab is formed of a plate material having a predetermined thickness by a plate shape imparting rolling portion; Deforming the cross-sectional shape of the aluminum alloy sheet by a shape rolling roll (S4); A step (S5) of forming the aluminum alloy sheet by the circular rolling rolls having a deformed cross-sectional shape; Controlling the surface of the aluminum alloy shell to reduce a curvature error (S6); And Roll forming method comprising the step (S7) wherein the formed aluminum alloy square material is reduced and loaded by the pinch roll. The method of claim 6, Each of the step S5 and the step S7 further includes a reducer, Roll forming method characterized in that the rolling speed of the aluminum alloy shell material is controlled by the reducer.

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