KR101648174B1 - helix pipe bending apparatus - Google Patents

helix pipe bending apparatus Download PDF

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Publication number
KR101648174B1
KR101648174B1 KR1020150092542A KR20150092542A KR101648174B1 KR 101648174 B1 KR101648174 B1 KR 101648174B1 KR 1020150092542 A KR1020150092542 A KR 1020150092542A KR 20150092542 A KR20150092542 A KR 20150092542A KR 101648174 B1 KR101648174 B1 KR 101648174B1
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KR
South Korea
Prior art keywords
bending
pipe
guide
frame
tool
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KR1020150092542A
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Korean (ko)
Inventor
이재홍
박승선
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(유)성문
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/05—Bending tubes using mandrels or the like co-operating with forming members

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

A helical pipe bending apparatus according to the present invention includes a frame, a frame supported by a driving shaft provided at one side of the frame, a first bending guide groove formed in a shape for bending the pipe, 1 bending tool, and a bending unit including a drive unit for rotating the drive shaft in the forward and reverse directions; A first guide unit supported on the frame to guide a pipe bent by the first bending tool and to prevent deformation of a cross-sectional shape of the pipe; A first support part installed on the frame and inserted into a hollow part of a pipe for bending to support the pipe, and a second support part installed on an end of the first support part and positioned inside the pipe bending by the first bending tool, And a first section deformation preventing unit including a first mandrel for preventing a diameter change of the pipe.

Figure R1020150092542

Description

[0001] HEELIX PIPE BENDING APPARATUS [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending apparatus, and more particularly, to a bending apparatus for a bending helical pipe capable of preventing variation in bending diameter of the pipe and bending in various shapes.

Generally, a bending apparatus fixes one end of a pipe at a starting point of a curvature of a rotary mold having a desired curvature, and then moves along the main surface of the rotary mold while the roller closely contacts the outer surface of the rotary mold, Bending the pipe with curvature.

This bending apparatus has a problem in that the cross section of the pipe is deformed (diameter is distorted) in the process of plastic deformation of the pipe along the curvature of the outer circumferential surface of the rotary mold. Such a change in cross section causes a resistance of the fluid flowing through the pipe.

Korean Patent Registration No. 10-68317 discloses a roller pipe bending device, and Korea Patent No. 583206 discloses an automatic bending device. Korean Patent Registration No. 0489932 discloses a bending apparatus for a rod and a billet, wherein a driving roller of a driving motor is rotatably coupled to a mounting base, and a V-shaped or semicircular lateral groove is formed along the outer periphery of the rotating roller, And a pusher roller installed at predetermined intervals with respect to the pusher roller.

However, even if the pusher roller is installed at a certain interval with respect to the rotating roller, the bending apparatus described above has a problem in that the bending force is uneven in the process of bending, and the cross-section is distorted due to the difference in the amount of plastic deformation at the bent portion It can not be fundamentally solved.

Also, there is a problem in that it is difficult to bend a pipe bending product having a three-dimensional shape or a diameter different from or different from the pitch.

Korea Patent No. 0489932 Korean Patent No. 583206

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a bending device for a bending helical pipe capable of fundamentally preventing a cross section from changing due to a difference in amount of plastic deformation at each bending portion.

Another object of the present invention is to provide a bending device for bending a pipe having a different diameter at the time of bending of a pipe and a bending device for bending a pipe at an accurate bending angle by minimizing a spring- .

According to an aspect of the present invention, there is provided a helix pipe bending apparatus comprising: a frame; a drive shaft provided at one side of the frame; a first bending guide groove formed in a shape for bending the pipe, A bending unit including a first bending tool having a grip portion for supporting the drive shaft, and a driving portion for rotating the drive shaft in the forward and reverse directions;

A first guide unit supported by the frame and guiding a pipe bent by the first bending tool and preventing a deformation of a cross-sectional shape of the pipe,

A first support portion installed in the frame and inserted into a hollow portion of a pipe for bending to support the pipe, and a pipe installed at an end of the support portion and bendingly positioned inside the pipe at a portion bent by the first bending tool And a first section deformation preventing unit including a first mandrel to prevent a diameter change.

In the present invention,

The first bending tool of the bending unit has a bending inducing groove formed on the outer circumferential surface thereof in a spiral shape and the first bending inducing groove corresponding to a pitch adjacent to the pitch of the first bending inducing groove has a different diameter or a shifted center .

A first shank portion coupled to an end of the support portion and substantially identical to a hollow diameter of a bendable pipe; a first shank portion extending from the first shank portion and being bent at a bending curvature, And a first bending guide portion.

 A second bending tool installed at the other side of the drive shaft and having a second bending guide groove formed in a circumferential direction on an outer circumferential surface thereof to bend an angle within 360 degrees of the pipe,

A second guide unit supported on the frame and guiding a pipe bent by the second bending tool,

A second support portion installed in the frame and inserted into the hollow portion of the pipe for bending to support the pipe, and a second support portion provided at the end of the second support portion and positioned inside the pipe bending by the second bending tool, Further comprising a second section deformation preventing unit including a second mandrel for preventing a diameter change of the pipe.

The helix pipe bending apparatus of the present invention can bend the pipe in various three-dimensional shapes and prevent the pipe from being distorted due to deformation of the pipe during plastic deformation due to the bedding of the pipe.

In the helical pipe bending apparatus of the present invention, since the precise position of the portion where the bending of the pipe is started can be fixed by the first or second mandrel drilling, the incidence of defects due to the bending operation can be minimized, Improvement can be achieved.

1 is a perspective view of a helix pipe bending apparatus according to the present invention,
2 is a plan view of a helix pipe bending apparatus according to the present invention,
FIG. 3 is a side view of the helical pipe bending apparatus shown in FIG. 1,
FIG. 4 is a perspective view illustrating a core configuration of a helical pipe bending apparatus,
FIG. 6 is a sectional view showing a state where a pipe is bent by the helical pipe bending apparatus shown in FIG. 1;

In the helical pipe bending apparatus of the present invention, the pipe is bent so that the cross section of the pipe is not deformed. An embodiment is shown in Figs. 1 to 5.

Referring to the drawings, a helical pipe bending apparatus 10 according to the present invention includes a frame 11, a first bending guide groove (not shown) supported by a drive shaft provided at one side of the frame 11, A first bending tool 20 having a grip portion 22 for supporting an end portion of a pipe 100 formed with a bending portion 21 and a drive portion 30 for rotating the drive shaft 31 in a forward and reverse direction A bending unit (40); And a first guide unit 50 which is supported by the frame 11 to guide the pipe 100 bent by the first bending tool 20 and prevent the deformation of the cross-sectional shape of the pipe. The pipe bending apparatus 10 includes a first support portion 61 installed in the frame 11 and inserted into the hollow portion 110 of the pipe 100 for bending to support the pipe 100, And a first mandrel (62) provided at an end of the first support portion (61) and positioned inside the pipe at a portion bent by the first bending tool to prevent a change in the diameter of the bending pipe, Prevention unit (60).

The pipe bending apparatus 10 according to the present invention constructed as described above will be described in more detail as follows.

The bending unit 40 has a first bending guide groove 21 formed along the spiral direction on the outer circumferential surface of the first bending tool 20 installed at one side of the drive shaft 31 rotatably installed in the frame 11 And a grip portion 22 for gripping an end portion of the pipe 100 to be bent is provided at the start portion of the first bending guide groove 21. [ The grip portion 22 is formed with a grip hole 23 to which an end of the pipe 100 is coupled. The grip portion 22 may be formed by coupling two members having a semicircular groove corresponding to the radius of the pipe.

The first bending guide groove 21 formed on the outer circumferential surface of the first bending tool 20 may be formed in a spiral shape. The first bending guide groove 21 may be formed in a shape corresponding to a pitch adjacent to the pitch of the first bending guide groove 21 1 bending inducing grooves 21 may be formed to have different diameters or be shifted in center. The first bending guide groove 21 is not limited to the above-described embodiment, and may be formed in various patterns so as to correspond to a shape to bend the pipe. The first bending guide groove 21 formed in a helical shape may be formed in a left-hand or right-hand direction. In this case, the first bending tool may have a bending guide groove formed in the left spiral direction and a bending groove formed in the right spiral direction. Alternatively, the first bending tool may be selectively mounted on the drive shaft or installed on both sides of the drive shaft. It is also possible to bend the pipe spirally with different pitches and diameters of the bending pipes.

The drive unit 30 for driving the drive shaft 31 of the bending unit 40 is provided with a drive sprocket 32 on the drive side 31 supported by the pillow block and the drive sprocket 32 is provided with a chain 33). Both ends of the chain 33 engaged with the drive sprocket 32 are connected to the rods 34a and 35a of the first and second drive cylinders 34 and 35 provided on the frame 11, respectively. The first and second driving cylinders (34) and (35) are installed in such a manner that each end of the chain (33) can be moved forward and backward by operating alternately.

The first guide unit 50 guides the pipe 100 supported by the frame 11 and is bent by the first bending tool 20 and prevents deformation of the cross-sectional shape of the pipe. The first guide shaft 51 is provided with a first conveying member 52 sliding along the first guide shaft 51 in a direction perpendicular to the bending direction of the pipe, Respectively. The first conveying member 52 is provided with first elevating cylinders 53 arranged in a direction parallel to the pipe and a first supporting bracket 54 is fixed to the rod 53a of the first elevating and lowering cylinders 53, The first support bracket 54 is provided with a plurality of first guide rollers 55 for supporting the bending pipe 100 in the longitudinal direction. The first guide roller 55 is formed with a groove corresponding to the radius of the pipe 100 on the outer circumferential surface to prevent the deformation of the end face of the pipe 100 during bending, .

The first end face deformation preventing unit 60 supports the pipe 100 for bending and is inserted into the hollow portion 110 of the pipe 100 to prevent deformation of the end face when the pipe 100 is plastically deformed A first support portion 61 is provided at a front portion of the first bending tool 20 so as to be moved back and forth by a third drive cylinder 65. At the end of the first support portion 61, There is provided a first mandrel 62 that is located inside the pipe 100 at a portion bent by the first bending tool 20 and prevents a change in the diameter of the pipe at the portion to be plastically deformed. Here, the third driving cylinder 65 is moved by the conveying guides 65a such that the third driving cylinder 65 can be moved in the left-right direction, that is, substantially parallel to the rotational axis when the pipe is bent in the left-hand or right- .

 The first mandrel 62 includes a first shank portion 62a which is substantially identical to the hollow diameter of the bendable pipe 100 coupled with the end of the first support portion 61 as shown in Figure 5, And a plurality of first bending guide portions 62b extending from the first shank portion 62a and having an outer peripheral surface having a plurality of spherical surfaces. The first bending inducing portion 62b may be formed by connecting balls having a diameter substantially equal to the diameter of the pipe by a connecting member such as a separate wye and an elastic rod. However, the present invention is not limited to this, and the first bending guide portion 62b may be configured to be deformable according to the bending curvature of the bending pipe. For example, an elastic body having an elastic force and having a spherical surface to reduce the frictional contact area with the inner surface of the pipe.

1 to 4, a second bending tool 70 is installed at the other end of the driving shaft 31 and a frame 11 is supported at an upper side of the second bending tool 70 A second guide unit 80 for guiding the pipe 100 bent by the second bending tool 70 and for preventing deformation of the cross-sectional shape of the pipe is provided. The frame 11 on the front side of the second bending tool 70 has a second support portion 91 inserted into the hollow portion 110 of the bending pipe 100 to support the pipe, And a second mandrel (92) provided at an end of the pipe (91) and positioned inside the pipe (100) at a portion bent by the second bending tool (70) Unit 90 is further provided.

The second bending tool 70 has a second bending guide groove 71 formed on an outer circumferential surface thereof so that the pipe 100 can be bent at an angle of 360 degrees (preferably, 270 degrees). A second grip portion 72 may be provided at the start of the second bending guide groove 71.

The second guide unit 80 is substantially the same as the first guide unit 80 and the two-section deformation preventing unit 90 is substantially the same as the first section deformation preventing unit 60.

That is, the second guide unit 80 guides the pipe 100 supported by the frame 11 and bent by the second bending tool 20, and prevents the deformation of the cross-sectional shape of the pipe. A second guide shaft 81 is provided in the frame 11 in a direction perpendicular to the bending direction of the pipe, that is, in a direction parallel to the drive shaft 31. The second guide shaft 81 is provided with a second conveying member 82 are installed. The second conveying member 82 is provided with second elevating cylinders 83 arranged in a direction parallel to the pipe and a second supporting bracket 84 is provided on the rod 83a of the second elevating cylinders 83. [ And the second support bracket 84 is provided with a plurality of second guide rollers 85 for supporting the bending pipe 100 in the longitudinal direction.

The second section deformation preventing unit 90 supports the pipe 100 for bending and is inserted into the hollow portion 110 of the pipe 100 to prevent the end face of the pipe 100 from being deformed during plastic deformation A second support portion 91 is provided at the front portion of the second bending tool 70 to be moved forward and backward by a fifth drive cylinder 95. At the end of the second support portion 91, A second mandrel 92 (see FIG. 5) for preventing a change in diameter of a pipe located in a portion of the pipe 100 that is bent by the second bending tool 70 and is located inside the pipe 100 is provided.

When the bending tool having the right helical bending guide groove is mounted on the other end side of the drive shaft 31, the fifth drive cylinder 95 can be moved in the left-right direction by the transfer guide .

The operation of the helical pipe bending apparatus of the present invention constructed as described above will be described below.

In order to bend the pipe 100 in a three-dimensional shape, the pipe 100 is first moved to the first end of the first annular drill (not shown) while the third drive cylinder 65 of the first end face deformation preventing unit 60 is operated and retracted 62 are installed in the hollow portion 110 of the pipe 100 to support the pipe 100 for bending.

In this state, after the end portion of the pipe 100 is supported on the grip portion 22, the third drive cylinder 65 of the first end face deformation preventing unit 60 is operated to move the first support portion 61 So that the first mandrel drill 62 provided at the end portion can be positioned inside the portion to be deformed by the first bending tool 20. [

The first guide rollers 55 can be supported on the upper surface of the pipe 100 by operating the first elevating cylinder 53 of the first guide guide 50, So that the upper peripheral side of the pipe supported by the first bending guide groove 21 can be covered. The outer circumferential surface of the pipe 100 to be bent is surrounded by the grooves formed in the outer circumferential surfaces of the first bending guide groove 21 and the first guide roller 55. [

In this state, the drive unit 30 is operated to rotate the drive shaft provided with the first bending tool 20. That is, the first drive cylinder 34 and the second drive cylinder 35 are alternately operated to pull the one side of the chain 33 engaged with the drive sprocket 32 to rotate the drive shaft 31.

In this case, when the pipe 100 moves along the first bending guide groove 21 of the first bending tool 20, the pipe 100 is plastically deformed. In this process, since the first mandrel drill 62 provided at the end of the first support portion 61 is located inside the plastic deformation portion of the pipe 100 by the first bending tool 20, It is possible to prevent the cross section of the pipe 100 from being deformed.

In this process, since the spiral grooves are formed on the outer circumferential surface of the first bending tool 20, the first transfer member 52 of the first guide unit 50 moves along the first guide shaft 51 .

On the other hand, the bending of the pipe by the second bending tool 70, the second guide unit 80 and the second section deformation preventing unit 90 is performed as described above.

When a bending tool having a left-handed bending guide groove is provided at the end of the drive shaft as shown by a phantom line in FIG. 4, the pipe can be rotated (reversely rotated) by the drive unit.

As described above, the helical pipe bending apparatus according to the present invention can prevent the cross section of the pipe from being changed due to the plastic deformation of the pipe during the bending of the pipe, and further, the quality of the product to be bent can be made uniform.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

The pipe bending apparatus of the present invention is widely applicable to the bending of pipe members of various patterns used in industrial machinery vessels.

Claims (7)

A first bending tool having a frame and a grip portion which is supported by a drive shaft provided at one side of the frame and in which a first bending guide groove is formed in a shape for bending the pipe and which supports an end portion of the pipe to be bent, A bending unit including a driving unit for driving the movable member in the forward and reverse directions;
A first guide unit supported by the frame and guiding a pipe bent by the first bending tool and preventing a deformation of a cross-sectional shape of the pipe,
A first support part installed on the frame and inserted into a hollow part of a pipe for bending to support the pipe, and a second support part installed on an end of the first support part and positioned inside the pipe bending by the first bending tool, And a first section deformation preventing unit including a first mandrel for preventing a diameter change of the pipe,
The first bending tool of the bending unit may have a first bending inducing groove formed on the outer circumferential surface thereof in a spiral shape. The first bending inducing groove corresponding to a pitch adjacent to the pitch of the first bending inducing groove may have a different diameter, Wherein the first and second helix pipes are formed at different pitches. delete The method according to claim 1,
A first shank portion coupled to an end of the first support portion and substantially identical to a hollow diameter of a bendable pipe; a first shank portion extending from the first shank portion and being bent at a bending curvature, Wherein the first bending guide portion has a plurality of first bending guide portions. The method according to claim 1,
A second bending tool installed at the other side of the drive shaft and having a second bending guide groove formed in a circumferential direction on an outer circumferential surface thereof to bend an angle of 360 degrees or less,
A second guide unit supported on the frame and guiding a pipe bent by the second bending tool,
A second support portion installed in the frame and inserted into the hollow portion of the pipe for bending to support the pipe, and a second support portion provided at the end of the second support portion and positioned inside the pipe bending by the second bending tool, Further comprising a second section deformation preventing unit including a second mandrel for preventing a change in the diameter of the pipe. The method according to claim 1,
Wherein the drive unit includes a drive sprocket installed on the drive shaft, a chain engaged with the drive sprocket, and first and second drive cylinders installed on the frame and provided with rods at both ends of the chain. Bending device. The method according to claim 1,
Wherein the first support portion is connected to a rod of a third cylinder rotatably installed on the frame, and the third cylinder is installed to be movable in a direction parallel to the drive shaft by a conveyance guide. The method according to claim 1,
The first guide unit includes first guide shafts provided on the upper side of the first mandrel drill in a direction parallel to the drive shaft of the first bending tool, a first conveying member slidable along the first guide shafts, A first supporting bracket installed on a rod of the first elevating and lowering cylinders; a plurality of second supporting brackets provided on the first supporting bracket for supporting the bending pipe in a longitudinal direction; Wherein the first guide rollers comprise first guide rollers.
KR1020150092542A 2015-06-29 2015-06-29 helix pipe bending apparatus KR101648174B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112045006A (en) * 2020-07-10 2020-12-08 张家港市昆仑管业有限公司 Bending method of reverse-rotation spiral pipe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100489932B1 (en) 2003-01-22 2005-05-17 로크산업 주식회사 bending machine for bar steel
JP2005186143A (en) * 2003-12-26 2005-07-14 Jfe Steel Kk Mandrel for rotating, drawing and bending tube, and device and method for rotary draw-bending
KR100583206B1 (en) 2004-08-23 2006-05-25 (주)파비스 Automatic bending system
KR20060126790A (en) * 2004-01-24 2006-12-08 팔리마 웨. 루드위흐 운트 코. Hot flow forming and bending method, and device for carrying out said method
JP2010131649A (en) * 2008-12-05 2010-06-17 Kogakuin Univ Apparatus and method for bending steel tube

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100489932B1 (en) 2003-01-22 2005-05-17 로크산업 주식회사 bending machine for bar steel
JP2005186143A (en) * 2003-12-26 2005-07-14 Jfe Steel Kk Mandrel for rotating, drawing and bending tube, and device and method for rotary draw-bending
KR20060126790A (en) * 2004-01-24 2006-12-08 팔리마 웨. 루드위흐 운트 코. Hot flow forming and bending method, and device for carrying out said method
KR100583206B1 (en) 2004-08-23 2006-05-25 (주)파비스 Automatic bending system
JP2010131649A (en) * 2008-12-05 2010-06-17 Kogakuin Univ Apparatus and method for bending steel tube

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112045006A (en) * 2020-07-10 2020-12-08 张家港市昆仑管业有限公司 Bending method of reverse-rotation spiral pipe
CN112045006B (en) * 2020-07-10 2022-02-15 张家港市昆仑管业有限公司 Bending method of reverse-rotation spiral pipe

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