KR20230087257A - Roll bending apparatus and roll bending method - Google Patents

Abstract

The present invention provides a roll bending apparatus comprising a movably installed roll set frame, and a bending frame having a plurality of bending rolls for bending a material and rotating on the roll set frame to adjust the positions of the plurality of bending rolls. The roll bending apparatus and a roll bending method according to the present invention can improve productivity and dimensional accuracy.

Description

Roll bending device and roll bending method {ROLL BENDING APPARATUS AND ROLL BENDING METHOD}

The present invention relates to a roll bending device and a roll bending method.

It should be noted that the contents described in this section simply provide background information on the present invention and do not constitute prior art.

The roll forming process is a process of manufacturing a beam having a constant cross section by sequentially bending and forming coils or long plates into continuously arranged forming rolls using a roll forming device. After the beam is formed after passing through the last roll of the roll forming process, various post-processes can be applied according to the final product.

The roll bending process is a process of bending a roll-formed straight beam by arranging a roll bending device at a rear end of the roll forming device in the roll forming process. While the bending roll of the roll bending device rotates, the roll forming device may enter the beam at a constant speed, and a transition zone in which the bending curvature of the beam changes may occur while the bending roll rotates.

The curvature of the transition section has an arbitrary value, which may cause a problem in that the design curvature of the part cannot be satisfied by reducing the dimensional accuracy of the part.

KR 20-1994-0004984 Y1

As an aspect of the present invention, it is intended to provide a roll bending device and a roll bending method capable of improving productivity and dimensional accuracy.

As one aspect for achieving the above object, the present invention is a role set frame movably installed; and a bending frame having a plurality of bending rolls for bending materials and adjusting positions of the plurality of bending rolls while rotating on the roll set frame.

The roll set frame may include a support frame; and a moving frame on which the bending frame is installed and which moves along the supply direction of the material on the support frame.

When bending the material in the transition section, the moving frame may move at a speed corresponding to the supply speed of the material on the support frame.

The bending frame includes a circular rotating plate body rotatably installed on the moving frame; and a plurality of bending rolls that are rotationally driven on the rotating plate body and whose positions are adjusted while the rotating plate body rotates.

Positions of the plurality of bending rolls are adjusted while the rotary plate body rotates in the transition section, and at least some of the plurality of bending rolls press the material so that the material follows the shape of the final product.

The bending frame includes a first bending roll, a second bending roll, and a third bending roll disposed radially at intervals of 120 degrees with respect to the rotation center of the rotating plate body, and curvature of the material in a downwardly curved form. When forming, the first bending roll and the second bending roll contact the material to form a radius of curvature of the material, and when the material is formed in an upwardly curved form, the first bending roll and the third bending roll A radius of curvature of the material may be formed while being in contact with the material.

The roll bending device includes a first driving unit installed on the moving frame and connected to one side of the rotating plate body to rotate the rotating plate body; and a second driving unit installed on the moving frame and connected to the other side of the rotating plate body to rotate the rotating plate body together with the first driving unit.

The first driving unit and the second driving unit may include screw bolts rotated by a motor member; a support block fixed to the moving frame and rotatably supporting the screw bolt; a moving block that moves according to the rotation of the screw bolt; and a link member having one side connected to the moving block and the other side connected to the rotating plate body of the bending frame.

The first driving unit and the second driving unit may further include guide rods fixed to the support block and the moving frame to guide the movement of the moving block.

As one aspect for achieving the above object, a material entry step of moving the material to enter the front end of the material between adjacent bending rolls of the bending frame; A first bending step of bending a first transition section of the material by moving the moving frame of the roll set frame along the supply direction of the material and supplying the material while rotating the bending frame in a first direction; and a second bending step of bending the target curvature section of the material after the first transition section by supplying the material in a state in which the movement of the moving frame is stopped and the rotation of the bending frame is stopped. to provide.

The first transition section is a section in which the curvature of the material changes from the first radius of curvature, which is the initial radius of curvature of the material, to the second radius of curvature, which is the target radius of curvature of the material, and is bent. After the section, a certain section of the material may be a section that is bent to the second radius of curvature.

The roll bending method moves the moving frame along the supply direction of the material and supplies the material while the bending frame rotates in a second direction opposite to the first direction to form a second transition section of the material after the target curvature section. A third bending step of bending; may further include.

The second transition section may be a section in which bending is performed while changing the curvature of the material from the second radius of curvature, which is the target radius of curvature of the material, to the first radius of curvature, which is the initial radius of curvature of the material.

The first bending step moves the moving frame at a speed corresponding to the supply speed of the material when bending the material in the first transition section, and the third bending step moves the moving frame when bending the material in the second transition section. The frame can be moved at a speed corresponding to the supply speed of the material.

According to one embodiment of the present invention, there is an effect of improving productivity and dimensional accuracy of the roll bending device and the roll bending method.

1A is a view showing a material bent by a roll bending device and a roll bending method of a comparative example compared to the roll bending device and the roll bending method of the present invention.
Figure 1b is a view showing a material bent by a roll bending apparatus and a roll bending method according to an embodiment of the present invention in contrast to the comparative example of Figure 1a.
2 is a view showing a roll bending device according to an embodiment of the present invention.
3 is a view showing an enlarged detail of the roll bending device of FIG. 2 .
4a and 4b are diagrams illustrating the rotational operation of the bending frame of the roll bending device of FIG. 2 .
5 is a view of FIG. 3 viewed from the 'I' direction.
Figure 6a is a view showing a state in which the material is formed in a downwardly curved form by the roll bending device and the roll bending method according to an embodiment of the present invention.
6B is a view showing a state in which curvature is formed in an upwardly curved form of a material by a roll bending apparatus and a roll bending method according to an embodiment of the present invention.
7 and 8 are views showing a roll bending method according to an embodiment of the present invention.
9 and 10 are diagrams showing enlarged details of the material to be bent in the roll bending method of FIGS. 7 and 8 .

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified in many different forms, and the scope of the present invention is not limited to the embodiments described below. In addition, the embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. The shapes and sizes of elements in the drawings may be exaggerated for clarity.

In the detailed description of the roll bending device and the roll bending method of the present invention, the terms of left and right directions, up and down directions, and forward and backward directions have been used, but this is for convenience of explanation, and the roll bending device and roll of the present invention It should be noted that the technical characteristics of the bending method are not limited to this direction.

Hereinafter, before describing the components of the roll bending device and the roll bending method according to an embodiment of the present invention, the roll bending device and the roll bending method according to the embodiment of the present invention (hereinafter referred to as 'embodiment') And, the roll bending apparatus and roll bending method (hereinafter referred to as 'comparative example') of the comparative example compared to the present invention will be compared and described.

Figure 1a is a view showing a material bent by the roll bending apparatus and roll bending method of a comparative example compared to the roll bending apparatus and roll bending method of the present invention, Figure 1b is a view of the present invention compared to the comparative example of Figure 1a It is a view showing a material bent by the roll bending device and the roll bending method according to an embodiment.

As an example, in the examples and comparative examples, the material is bent to form a transfer section (S1), a first transition section (SN-1), a target curvature range, a second transition section (SN-2), and a transfer section (S1). can form

Here, the transfer section (S1) is a section in which the material is not bent. In the transfer section S1, the material has a first radius of curvature R1, and when the supplied material is a straight line, the first radius of curvature R1 in the transfer section S1 may have an infinite value.

The target curvature section S2 is a section in which a certain section of the material is bent to the second curvature radius R2 after the first transition section SN-1. In the target curvature section S2, the material may have a second curvature radius R2.

In the first transition section SN-1, the curvature of the material changes from the first radius of curvature R1, which is the initial radius of curvature of the material before bending, to the second radius of curvature R2, which is the target radius of curvature of the material. This is the bending section.

In the second transition period (SN-2), the curvature of the material changes from the second radius of curvature R2, which is the target radius of curvature, to the first radius of curvature R1, which is the initial radius of curvature of the material before bending, while the curvature of the material changes to an arbitrary curvature. This is the bending section.

In the first and second transition sections, the material may have an N-th radius of curvature (RN), and the N-th radius of curvature (RN) is a ratio between the first radius of curvature (R1) of the transfer section (S1) and the target curvature section (S2). The curvature may gradually change between the second curvature radii R2.

Referring to Figure 1a, in the case of the comparative example, unlike the embodiment of the present invention, the roll set frame 100 does not move along the supply direction of the material, and accordingly, the first transition section (SN-1) and the second It can be seen that dimensional errors occur in the final product produced as the material is pushed as much as the material supply speed in the second transition period (SN-2).

In addition, in the case of the comparative example, the bending frame 200 rotates and the position of the bending roll 230 is not adjusted, and accordingly, the first transition period SN-1 and the second transition period SN-2 It can be seen that a large dimensional error occurs in the final product produced compared to the embodiment because the radius of curvature of the material cannot be precisely controlled.

Referring to FIG. 1B, in the embodiment, as the roll set frame 100 moves along the material supply direction, even though the material is supplied in the first transition period SN-1 and the second transition period SN-2, the material It can be seen that there is no dimensional error because the is not pushed.

Referring to FIG. 1B, in the embodiment, the bending frame 200 rotates and the position of the bending roll 230 is adjusted, so that the material is changed in the first transition period SN-1 and the second transition period SN-2. It can be seen that the radius of curvature can be precisely adjusted so that dimensional errors do not occur.

Hereinafter, with reference to FIGS. 2 to 4B, components included in the roll bending device according to an embodiment of the present invention will be described in detail.

Figure 2 is a view showing a roll bending apparatus according to an embodiment of the present invention, Figure 3 is a view showing an enlarged detail of the roll bending apparatus of Figure 2, Figures 4a and 4b is a roll bending apparatus of Figure 2 It is a view showing the rotation operation of the bending frame 200 of.

A roll bending device according to an embodiment of the present invention may include a roll set frame 100 and a bending frame 200.

The roll set frame 100 may be movably installed. For example, the roll set frame 100 may be installed to be movable along the supply direction of the material.

The moving frame 110 of the role set frame can move at a speed corresponding to the supply speed of the material. For example, the roll set frame 100 may move from left to right, which is a direction corresponding to the supply direction of the material.

By moving the material (J) with a roll bending device such as a transfer roll (K), the front end of the material (J) may enter between adjacent bending rolls (230) of the bending frame (200). For example, the material J manufactured by the roll forming method may be supplied at a constant speed by a transfer roll K or the like.

The bending frame 200 has a plurality of bending rolls 230 for bending materials, and the positions of the plurality of bending rolls 230 may be adjusted while rotating on the roll set frame 100 .

In the bending roll 230 device, the roll set frame 100 moves along the supply direction of the material, so that the material is not pushed even if the material is supplied in the first transition section (SN-1) and the second transition section (SN-2). It can be seen that there is no dimensional error.

The bending roll 230 device is positioned so that at least some of the plurality of bending rolls 230 press the material so that the material follows the shape of the final product while the bending frame 200 rotates. It can be seen that dimensional error does not occur because the radius of curvature of the material can be precisely controlled in the first transition section SN-1 and the second transition section SN-2 by adjusting .

The role set frame 100 may include a moving frame 110 and a support frame 130 .

The support frame 130 may have a guide rail 131 for guiding the moving frame 110 to move along the supply direction of the material. Guide rails 131 may be installed on the front of the support frame 130, and the guide rails 131 may extend in the left and right directions, and may be installed in pairs spaced apart in the vertical direction.

The moving frame 110 is installed with the bending frame 200 and can move along the supply direction of the material on the support frame 130 .

For example, the moving frame 110 may include a bending frame 200 , a first driving unit 300 and a second driving unit 400 . A guide rail 131 is disposed on the rear surface of the movable frame 110, and the movable frame 110 may be installed to be movable in left and right directions on the guide rail 131. When the material is supplied from left to right, the moving frame 110 can also move from left to right.

When bending the material in the transition section, the moving frame 110 may move on the guide rail 131 at a speed corresponding to the supply speed of the material. Accordingly, while the moving frame 110 moves, a separate degree of freedom is given in the supply direction of the material, and the movement of the material and the moving frame 110 is synchronized to minimize the occurrence of dimensional errors of the material in the transition section. .

For example, when bending the material in the transition section, the moving frame 110 may move at the same speed as the supply speed of the material on the guide rail 131 .

The bending frame 200 may include a rotary plate body 210 and a plurality of bending rolls 230 .

The rotating plate body 210 may be rotatably installed on the moving frame 110 . The rotating plate body 210 may have a circular shape and may be rotatably installed on the moving frame 110 via a rotating shaft.

While the rotary plate body 210 rotates on the moving frame 110, the position of the plurality of bending rolls 230 is adjusted, and at least some of the plurality of bending rolls 230 press the material so that the material follows the shape of the final product. can do.

The plurality of bending rolls 230 are rotationally driven on the rotary plate body 210, and their positions may be adjusted while the rotary plate body 210 rotates. The bending roll 230 may bend the material while contacting the material, and the bending roll 230 may be rotationally driven by a bending motor (not shown) or the like.

A plurality of bending rolls 230 may be arranged radially with respect to the center of rotation of the rotating plate body 210 . For example, a first bending roll 231 , a second bending roll 232 , and a third bending roll 233 may be installed in the rotating plate body 210 .

While the rotating plate body 210 rotates in the transition section, the positions of the plurality of bending rolls 230 are adjusted, and at least some of the plurality of bending rolls 230 press the material so that the material follows the shape of the final product. there is.

The transition section is a section in which the curvature of the material changes to an arbitrary curvature and is bent between the first radius of curvature R1, which is the initial radius of curvature, and the second radius of curvature R2, which is the target radius of curvature of the material. For example, when an unbent linear material is supplied to the roll bending device, the first radius of curvature R1 may have an infinite value.

The transition section may include a first transition section SN-1 and a second transition section SN-2. In the first transition section SN-1, the curvature of the material changes from the first radius of curvature R1, which is the initial radius of curvature of the material before bending, to the second radius of curvature R2, which is the target radius of curvature of the material. It is a section to be bent, and the second transition section (SN-2) is the curvature of the material from the second radius of curvature R2, which is the target radius of curvature, to the first radius of curvature R1, which is the initial radius of curvature of the material before bending. It is a section that is bent while changing with the curvature of .

In the roll bending device, while the bending frame 200 rotates in the first and second transition sections, at least some of the plurality of bending rolls 230 pressurize the material so that the material follows the shape of the final product. 230) may be adjusted.

For example, in the first transition period (SN-1), the first bending roll 231 and the second bending roll 232 are rotated so that the material follows the shape of the final product, so that the dimensional accuracy of the final product is improved while contacting the material. In the second transition period (SN-2), the first bending roll 231 and the third bending roll 233 are rotated to make contact with the material so that the material follows the shape of the final product. Precision can be improved.

The bending roll 230 device may include a first driving unit 300 and a second driving unit 400 .

The first driving unit 300 is installed on the moving frame 110 and is connected to one side of the rotating plate body 210 to rotate the rotating plate body 210 . The second driving unit 400 is installed on the moving frame 110 and is connected to the other side of the rotating plate body 210 to rotate the rotating plate body 210 together with the first driving unit 300 .

The first driving unit 300 and the second driving unit 400 may be spaced apart with the bending frame 200 therebetween. For example, the first driving unit 300 and the second driving unit 400 may be spaced apart from each other in the left and right directions.

The first driving unit 300 and the second driving unit 400 may include screw bolts, support blocks, moving blocks, and link members. The first driving unit 300 includes a first screw bolt 310 rotated by a first motor member 311, a first support block 330, a first moving block 350, and a first link member 370. And, the second driving unit 400 may include a second screw bolt 410, a second support block 430, a second moving block 450, and a second link member 470.

The screw bolt may be rotated by a motor member. For example, the screw bolt may extend in the vertical direction, and a motor member may be disposed on one side of the screw bolt to rotate the screw bolt. The first screw bolt 310 may be rotated by the first motor member 311 , and the second screw bolt 410 may be rotated by the second motor member 411 . A guide rod may be disposed at the rear of the screw bolt, and in FIG. 3 , reference numerals of the guide rods 390 and 490 are indicated by dotted lines.

The support block is fixed to the moving frame 110 to rotatably support the screw bolt. A screw bolt passes through the support block, and a bearing is installed inside the support block to rotatably support the screw bolt. For example, the screw bolt may not have an external screw thread formed in a portion supported by the bearing of the support block so as to prevent the bearing from being damaged as the screw bolt rubs the external screw thread with the bearing.

The moving block may move according to the rotation of the screw bolt. An internal screw thread engaged with an external screw thread of the screw bolt may be formed inside the movable block, and the movable block may move vertically when the screw bolt rotates.

One side of the link member may be connected to the moving block, and the other side may be connected to the rotating plate body 210 of the bending frame 200.

5 is a view of FIG. 3 viewed from the 'I' direction.

The first driving unit 300 and the second driving unit 400 may further include guide rods. The first driving unit 300 may include a first guide rod 390 , and the second driving unit 400 may include a second guide rod 490 .

The guide rod is fixed to the support block and the moving frame 110 to guide the movement of the moving block.

The guide rod may be installed in parallel with the screw bolt to guide the moving block moving on the screw bolt. For example, the guide rod and the screw bolt may extend in the vertical direction.

The guide rod is disposed at the rear of the screw bolt, and when viewed from the front, the guide rod and the screw bolt may be disposed at the same position. That is, the screw bolt and the guide rod may be spaced apart from each other in the front and rear directions and may be arranged in parallel in the vertical direction.

Figure 6a is a view showing a state in which the material is formed in a downwardly curved form by the roll bending device and the roll bending method according to an embodiment of the present invention, Figure 6b is a roll according to an embodiment of the present invention It is a diagram showing a state in which a material is formed in an upwardly curved form by a bending device and a roll bending method.

The bending frame 200 includes a first bending roll 231, a second bending roll 232, and a third bending roll 233 radially disposed at intervals of 120 degrees from the rotation center of the rotating plate body 210. can do.

When forming the curvature of the material in a downward curved form, the first bending roll 231 and the second bending roll 232 may contact the material to form a curvature radius of the material, and the curvature of the material in an upward curved form. During formation, the first bending roll 231 and the third bending roll 233 may form a radius of curvature of the material while being in contact with the material.

A brief description of the operation of the roll bending device is as follows.

The transfer roll (K) or the like can move the material (J) to enter the roll bending device, and the front end of the jammed material (J) will enter between the adjacent bending rolls (230) of the bending frame (200). can

The roll bending device may sequentially bend the first transition section SN-1, the target curvature section S2, and the second transition section SN-2.

First, the moving frame 110 of the roll set frame 100 is moved along the supply direction of the material, and the rotating plate body 210 of the bending frame 200 is rotated in the first direction to supply the material so that the first transition of the material The section SN-1 may be bent. For example, the rotary plate body 210 may rotate in the first direction, clockwise.

Next, by stopping the movement of the moving frame 110 and supplying the material in a state in which the rotation of the rotating plate body 210 is stopped, bending the target curvature section (S2) of the material after the first transition section (SN-1) can do.

Next, while moving the moving frame 110 of the roll set frame 100 along the supply direction of the material and rotating the rotating plate body 210 of the bending frame 200 in a second direction opposite to the first direction, the material is supplied. Thus, the second transition section SN-2 of the material may be bent. For example, the rotary plate body 210 may rotate in the second direction counterclockwise.

Next, the moving frame 110 of the roll set frame 100 returns to the initial position, and the rotating state of the rotating plate body 210 of the bending frame 200 may also return to the initial state. The roll bending device may bend the material while repeating the above operations.

Next, with reference to FIGS. 7 to 10 , components included in the roll bending method according to an embodiment of the present invention will be described in detail.

7 and 8 are views showing a roll bending method according to an embodiment of the present invention, and FIGS. 9 and 10 are views showing enlarged details of a material bent in the roll bending method of FIGS. 7 and 8. .

7 (a) to (d) are roll bending devices applied to the roll bending method in the first step (T1), the second step (T2), the third step (T3), and the fourth step (T4). Steps are shown, and FIG. 9 (a) to (d) and FIG. 7 (a) to (d) are the first step (T1), the second step (T2), the third step (T3), The bending state of the material in step 4 (T4) is shown.

Figure 8 (a) ~ (d) of the roll bending device applied to the roll bending method in the fourth step (T4), fifth step (T5), sixth step (T6), seventh step (T7) Steps are shown, and FIG. 9 (a) to (d) and FIG. The bending state of the material in step 7 (T7) is shown.

7(d) and 8(a) are the same diagram, and FIGS. 9(d) and 10(a) are the same diagram. 7(d) and 8(a) show the same drawings for explanation of the successive steps of FIGS. 7 and 8, and for explanation of the successive steps of FIGS. 9 and 10 ( d), the same drawing is shown in FIG. 10(a).

The first step T1 shows the end point of the material entry step forming the transfer section S1 and the start point of the first transition section SN-1. A material entering step of forming the transfer section S1 may be performed up to the first step T1.

The second step T2 shows the start point of the first transition section SN-1, and the third step T3 shows the end point of the first transition section SN-1. A first bending step of bending the first transition section SN-1 may be performed between the second step T2 and the third step T3.

The fourth step (T4) shows the end point of the first transition section (SN-1), and the first step of bending the target curvature section (S2) between the third step (T3) and the fourth step (T4). Two bending steps may be performed.

The fifth step T5 shows the end point of the second transition period SN-2, and the second transition period SN-2 between the fourth step T4 and the fifth step T5 A third bending step of bending may be performed.

The sixth step T6 shows a process of forming the transfer section S1 after the second transition section SN-2. The seventh step (T7) is a return step in which the moving frame 110 of the roll set frame 100 returns to the initial position and the rotating state of the rotating plate body 210 of the bending frame 200 also returns to the initial state. there is.

A roll bending method according to an embodiment of the present invention may include a material entry step, a first bending step, and a second bending step.

Referring to FIG. 7(a) and FIG. 9(a) , in the step of entering the material, the front end of the material may be moved between the adjacent bending rolls 230 of the bending frame 200 by moving the material. In the material entering step, the unbent material may be passed through to form a material transfer section S1.

Here, the transfer section (S1) is a section in which the material is not bent. In the transfer section S1, the material has a first radius of curvature R1, and when the supplied material is a straight line, the first radius of curvature R1 in the transfer section S1 may have an infinite value.

Referring to (b) and (c) of FIG. 7 and (b) and (c) of FIG. 9 , the first transition section SN-1 between the second step T2 and the third step T3 A first bending step of bending may be performed.

In the first bending step, the moving frame 110 of the frame is moved along the supply direction of the material, and the material is supplied while rotating the bending frame 200 in the first direction to form the first transition section SN-1 of the material. can be bent. In the first bending step, at the end point of the first transition period (SN-1), the roll set frame 100 may stop moving and the rotating frame may stop rotating.

In the first bending step, while the bending frame 200 rotates in the first transition section SN-1, at least some of the plurality of bending rolls 230 pressurize the material so that the material follows the shape of the final product. The position of the dog bending rolls 230 may be adjusted.

For example, in the first transition period (SN-1), the first bending roll 231 and the second bending roll 232 may contact the material to improve the dimensional accuracy of the final product.

In the first bending step, a first material transition section SN-1 may be formed after the material transfer section S1. In the first bending step, the material may be bent while gradually changing the curvature of the material from the first radius of curvature R1 to the second radius of curvature R2.

Referring to (c), (d) of FIG. 7, (c), (d) of FIG. 9, bending the target curvature section S2 between the third step T3 and the fourth step T4 A second bending step may be performed.

In the second bending step, the movement of the moving frame 110 is stopped and the material is supplied in a state where the rotation of the bending frame 200 is stopped, and the target curvature section (S2) of the material after the first transition section (SN-1) can be bent. In the second bending step, a target curvature section S2 of the material may be formed after the first transition section SN-1 of the material.

material entry stage. The first bending step and the second bending step may be sequentially performed.

The first transition section (SN-1) is a section in which the curvature of the material changes from the first radius of curvature R1, which is the initial radius of curvature of the material, to the second radius of curvature R2, which is the target radius of curvature of the material, and is bent, The target curvature section S2 may be a section in which a certain section of the material is bent to the second curvature radius R2 after the first transition section SN-1.

The roll bending method may further include a third bending step, and the third bending step may be performed after the second bending step.

Referring to FIGS. 8 (a) and (b) and FIG. 10 (a) and (b), the second transition section SN-2 between the fourth step T4 and the fifth step T5 A third bending step of bending may be performed.

The third bending step moves the moving frame 110 along the supply direction of the material and supplies the material while the bending frame 200 rotates in the second direction opposite to the first direction, so that the material is supplied after the target curvature section S2. The second transition period SN-2 of can be bent. In the third bending step, the material may be bent while gradually changing the curvature of the material from the second radius of curvature R2 to the first radius of curvature R1.

In the third bending step, while the bending frame 200 rotates in the second transition section SN-2, at least some of the plurality of bending rolls 230 pressurize the material so that the material follows the shape of the final product. The position of the dog bending rolls 230 may be adjusted.

For example, in the second transition period (SN-2), the first bending roll 231 and the third bending roll 233 contact the material to improve the dimensional accuracy of the final product.

material entry stage. First bending step. The second bending step and the third bending step may be sequentially performed.

Referring to FIG. 8(c) and FIG. 10(c) , in the sixth step T6, the material transfer section S1 may be formed after the second transition section SN-2.

Next, referring to FIG. 8 (d) and FIG. 10 (d), in the return step, the moving frame 110 of the roll set frame 100 returns to the initial position, and the rotating plate body of the bending frame 200 ( 210) can also be returned to its initial state.

The second transition section (SN-2) may be a section in which the curvature of the material changes from the second radius of curvature R2, which is the target radius of curvature of the material, to the first radius of curvature R1, which is the initial radius of curvature of the material. there is.

The first bending step moves the moving frame 110 at a speed corresponding to the supply speed of the material when bending the material in the first transition section (SN-1), and the third bending step is the second transition section (SN-2). ) When bending the material, the moving frame 110 can be moved at a speed corresponding to the supply speed of the material.

In addition, it goes without saying that various embodiments of the roll bending apparatus having various embodiments described above can be applied to the roll bending method of the present invention.

Therefore, the configuration of the roll set frame 100, the bending frame 200, the first drive unit 300, and the second drive unit 400 of the roll bending device used in the roll bending method are as described above. Since it is the same as, a detailed description thereof is omitted to avoid duplication.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and variations are possible without departing from the technical spirit of the present invention described in the claims. It will be obvious to those skilled in the art.

100: roll set frame 110: movement frame
130: support frame 131: guide rail
200: bending frame 210: rotating plate body
230: bending roll 231: first bending roll
232: second bending roll 233: third bending roll
300: first driving unit 310: first screw bolt
311: first motor member 330: first support block
350: first moving block 370: first link member
390: first guide rod 400: second driving unit
410: second screw bolt 411: second motor member
430: second support block 450: second moving block
470: second link member 490: second guide rod
J: Material K: Transfer roll
R1: first radius of curvature R2: second radius of curvature
RN: Nth radius of curvature S1: Transfer section
SN-1: 1st transition section SN-2: 2nd transition section
S2: target curvature section T1: first step
T2: second step T3: third step
T4: 4th step T5: 5th step
T6: 6th step T7: 7th step

Claims (14)

A roll set frame that is movably installed; and
A roll bending apparatus comprising: a bending frame having a plurality of bending rolls for bending materials and adjusting positions of the plurality of bending rolls while rotating on the roll set frame.
The method of claim 1, wherein the role set frame,
support frame; and
A roll bending device including a moving frame on which the bending frame is installed and which moves along the supply direction of the material on the support frame.
According to claim 2,
When bending the material in the transition section, the moving frame moves at a speed corresponding to the supply speed of the material on the support frame.
The method of claim 2, wherein the bending frame,
a circular rotating plate body rotatably installed on the moving frame; and
A roll bending device including a plurality of bending rolls that are rotationally driven on the rotating plate body and whose positions are adjusted while the rotating plate body rotates.
According to claim 4,
A roll bending device in which positions of the plurality of bending rolls are adjusted while the rotating plate body rotates in a transition section, and at least some of the plurality of bending rolls press the material so that the material follows the shape of the final product.
The method of claim 4, wherein the bending frame,
A first bending roll, a second bending roll, and a third bending roll disposed radially at intervals of 120 degrees based on the rotation center of the rotating plate body,
When forming the curvature of the material in a downward curved form, the first bending roll and the second bending roll contact the material to form a radius of curvature of the material,
A roll bending device for forming a curvature radius of the material while the first bending roll and the third bending roll come into contact with the material when forming the curvature of the material in an upwardly curved form.
According to claim 4.
a first driving unit installed on the moving frame and connected to one side of the rotating plate body to rotate the rotating plate body; and
A second driving unit installed on the moving frame and connected to the other side of the rotating plate body to rotate the rotating plate body together with the first driving unit; roll bending device further comprising a.
The method of claim 7, wherein the first driving unit and the second driving unit,
A screw bolt rotated by a motor member;
a support block fixed to the moving frame and rotatably supporting the screw bolt;
a moving block that moves according to the rotation of the screw bolt; and
A roll bending device comprising: a link member having one side connected to the moving block and the other side connected to the rotating plate body of the bending frame.
The method of claim 8, wherein the first driving unit and the second driving unit,
A roll bending device further comprising a guide rod fixed to the support block and the movable frame to guide the movement of the movable block.
A material entry step of moving the material and entering the front end of the material between adjacent bending rolls of the bending frame;
A first bending step of bending a first transition section of the material by moving the moving frame of the roll set frame along the supply direction of the material and supplying the material while rotating the bending frame in a first direction; and
and a second bending step of bending the target curvature section of the material after the first transition section by supplying the material in a state in which the movement of the moving frame is stopped and the rotation of the bending frame is stopped.
According to claim 10,
The first transition section is a section in which the curvature of the material changes from the first radius of curvature, which is the initial radius of curvature of the material, to the second radius of curvature, which is the target radius of curvature of the material, and is bent,
The target curvature section is a section in which a certain section of the material after the first transition section is bent to the second radius of curvature.
According to claim 11,
A third step of bending the second transition section of the material after the target curvature section by moving the moving frame along the supply direction of the material and supplying the material while the bending frame rotates in a second direction opposite to the first direction. Bending step; roll bending method further comprising.
According to claim 12,
The second transition section is a roll bending method in which the curvature of the material changes from the second radius of curvature, which is the target radius of curvature of the material, to the first radius of curvature, which is the initial radius of curvature of the material.
According to claim 13,
The first bending step moves the moving frame at a speed corresponding to the supply speed of the material when bending the material in the first transition section,
The third bending step is a roll bending method of moving the moving frame at a speed corresponding to the supply speed of the material when bending the material in the second transition section.

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