KR20170088713A - helix pipe bending apparatus - Google Patents

helix pipe bending apparatus Download PDF

Info

Publication number
KR20170088713A
KR20170088713A KR1020160008963A KR20160008963A KR20170088713A KR 20170088713 A KR20170088713 A KR 20170088713A KR 1020160008963 A KR1020160008963 A KR 1020160008963A KR 20160008963 A KR20160008963 A KR 20160008963A KR 20170088713 A KR20170088713 A KR 20170088713A
Authority
KR
South Korea
Prior art keywords
bending
pipe
bent
frame
guide groove
Prior art date
Application number
KR1020160008963A
Other languages
Korean (ko)
Other versions
KR101874569B1 (en
Inventor
이재홍
박승선
Original Assignee
(유)성문
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (유)성문 filed Critical (유)성문
Priority to KR1020160008963A priority Critical patent/KR101874569B1/en
Publication of KR20170088713A publication Critical patent/KR20170088713A/en
Application granted granted Critical
Publication of KR101874569B1 publication Critical patent/KR101874569B1/en

Links

Images

Classifications

    • 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
    • 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
    • B21D7/02—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
    • B21D7/025—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member and pulling or pushing the ends of the work
    • 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
    • B21D7/03—Apparatus with means to keep the profile in shape
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

The present invention relates to a helix pipe bending apparatus comprising a frame and a driving shaft provided at one side of the frame and having a first bending guide groove formed in a shape for bending the pipe, A bending unit including a first bending tool having a gripping portion for bending the first bending tool and a drive unit for rotating the drive shaft in a forward and reverse direction, A first support unit installed on the frame and inserted into a hollow portion of the pipe for bending to support the pipe, and a second support unit installed on an end of the first support unit, And a first mandrel to prevent a change in diameter of the pipe which is located inside the pipe at a portion bent by the first bending tool and is bent Wherein the first bending guide groove has a distance from the center line of rotation of the first bending tool as the distance from the first bending guide groove increases along the circumferential direction of the first bending tool Or increase.

Figure P1020160008963

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, since the bending apparatus described above is formed in a circular shape having a predetermined radius with respect to the center of rotation of the rotating roller, the bending apparatus has a difficulty in bending the pipe with different curvature along the longitudinal direction.

It is an object of the present invention to provide a bending device for bending a pipe having different curvatures along the longitudinal direction of the pipe.

According to an aspect of the present invention, there is provided a helix pipe bending apparatus comprising: a frame; a driving shaft provided on 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 an end portion of the driving shaft and a driving portion for rotating the driving shaft in a forward and reverse direction, and a pipe supported by the frame and bending by the first bending tool, A first support unit installed on the frame and inserted into a hollow portion of the pipe for bending to support the pipe, and a second support unit installed on the end of the first support unit, Wherein the bending tool is located inside the pipe at a portion bent by the first bending tool to prevent a change in diameter of the pipe bent Wherein the first bending guide groove has a first bending guide groove extending in a circumferential direction of the first bending tool with respect to the gripper, Are formed to decrease or increase the separation distance.

Wherein the first mandrel includes a first shank portion coupled to an end of the support portion and having an outer diameter corresponding to a hollow diameter of the pipe to be bended and a second shank portion extending from the first shank portion and being bent at a predetermined bending curvature And a plurality of first bending guide portions having spherical surfaces on the outer circumferential surface.

The helical pipe bending apparatus according to the present invention includes 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 the pipe at an angle of less than 360 degrees, A second guide unit supported on the frame for guiding the pipe bent by the second bending tool and for preventing deformation of a cross-sectional shape of the pipe, And a second bending tool installed at an end of the first bending tool to prevent a change in the diameter of the pipe bent and positioned inside the pipe at a portion bent by the second bending tool, And a second section deformation preventing unit including a second men drill.

The first bending guide groove in which the pipe is supported is positioned at a center of rotation of the first bending tool as the distal end of the pipe is moved along the circumferential direction of the first bending tool with respect to the gripping portion where the end of the pipe is gripped, Since the spacing distance is reduced or increased, it is possible to easily bend the pipe with a different curvature along the longitudinal direction of the pipe.

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

Hereinafter, a helix pipe bending apparatus according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 6 show a helical pipe bending apparatus 10 according to the present invention.

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 for guiding the pipe 100 supported by the frame 11 and bent by the first bending tool 20 and preventing the deformation of the cross- ). The helical pipe bending apparatus 10 includes a 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 drill (62) installed at an end of the 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 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 is spaced apart from the rotation center line of the first bending tool 20 by a distance along the circumferential direction of the first bending tool 20 with respect to the gripper 22, Is decreased. The first bending guide groove 21 is not limited to the example shown in the drawing but may be different from the first bending guide groove 21 in the circumferential direction of the first bending tool 20, May be formed so as to increase the spacing distance with respect to the rotation center line.

Since the first bending guide groove 21 is formed as described above, the pipe 100 can be easily bent at different curvatures along the longitudinal direction of the pipe 100. 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.

In addition, 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 20 may be provided with 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 20 may be selectively mounted on the drive shaft or installed on both sides of the drive shaft have. It is also possible to bend the pipe spirally with the pitch and diameter of the bending pie.

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 provided on 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 support portion 61 which is moved forward and backward by a third drive cylinder 65 is provided on a front portion of the first bending tool 20 and a first bending portion 61 is provided on an end portion of the first support portion 61, There is provided a first mandrel (62) which is located inside the pipe (100) at a portion bent by the tool (20) and prevents a change in the diameter of the pipe at the plastically deformed portion. Here, the third drive cylinder 65 is supported by the third drive cylinder transfer guides 65a so as to be movable in the left-right direction, that is, substantially parallel to the rotation axis when bending the pipe into the left spiral or the right spiral. do.

 The first mandrel 62 includes a first shank portion 62a substantially identical to the hollow diameter of the pipe 100 to be bent and coupled to the end of the 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.

And the second guide unit 80 is substantially the same as the first guide unit 50 and the second 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 70, 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 support portion 91 which is moved forward and backward by a fifth drive cylinder 95 is provided on the front portion of the second bending tool 70 and a second bending portion 91 is provided on the end of the second support portion 91, A second mandrel 92 (see FIG. 5) is provided which is located inside the pipe 100 at a portion bent by the tool 70 and prevents a change in the diameter of the pipe at the portion to be plastically deformed.

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 fifth drive cylinder transfer guide 95a .

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 unit 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 drive shaft 31 is rotated by pulling one side of the chain 33 hooked on the drive sprocket 32 by operating the first drive cylinder 34 and the second drive cylinder 35 alternately.

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 upper 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 groove is 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 guide 80 and the second section deformation preventing unit 90 is carried out in the manner 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.

10: Helix pipe bending device
11: Frame
20: First bending tool
21: first bending guide groove
22:
30:
40: Bending unit
50: first guide unit
51: first guide shaft
52: first conveying member
53: 1st lift cylinder
54: first support bracket
55: first guide roller
60: first end face deformation preventing unit
61: Support
62: 1st mandrel
65: Third drive cylinder
70: 2nd bending tool
71: second bending guide groove
72: second grip section
80: second guide unit
81: second guide shaft
82: second conveying member
83: 2nd lift cylinder
84: second support bracket
85: second guide roller
90: second section deformation preventing unit
91: second support portion
92: 2nd mandrel
95: fifth drive cylinder

Claims (3)

A first bending tool supported by a driving shaft provided at one side of the frame and having a first bending guide groove formed in a shape for bending the pipe and having a grip portion for supporting an end of the pipe bent; A bending unit including a driving unit for rotating the driving shaft in the forward and reverse directions;
A first guide unit supported by the frame and guiding the pipe bent by the first bending tool, and preventing deformation of a cross-sectional shape of the pipe;
A first support portion installed in the frame and inserted into a hollow portion of the pipe for bending to support the pipe; a first support portion provided at an end of the first support portion, And a first end face deformation preventing unit including a first mandrel to prevent a change in the diameter of the pipe bent and positioned at the first end face,
Wherein the first bending guide groove is formed to decrease or increase a spacing distance with respect to the rotation center line of the first bending tool as the distance from the first bending guide groove increases along the circumferential direction of the first bending tool. Bending device.
The method according to claim 1,
Wherein the first mandrel includes a first shank portion coupled to an end of the support portion and having an outer diameter corresponding to a hollow diameter of the pipe to be bended and a second shank portion extending from the first shank portion and being bent at a predetermined bending curvature And a plurality of first bending guide portions having spherical surfaces on an outer circumferential surface thereof.
The method according to claim 1,
A second bending tool installed on the other side of the drive shaft and having a second bending guide groove formed in a circumferential direction on the outer circumferential surface to bend the pipe at an angle within 360 degrees;
A second guide unit supported on the frame to guide the pipe bent by the second bending tool and to prevent deformation of a cross-sectional shape of the pipe;
A first support portion inserted into the hollow portion of the pipe for mounting deer bending to the frame and supporting the pipe; a first support portion provided at an end of the first support portion, And a second section deformation preventing unit including a second mandrel to prevent a change in diameter of the pipe that is bent and is bent.





KR1020160008963A 2016-01-25 2016-01-25 helix pipe bending apparatus KR101874569B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160008963A KR101874569B1 (en) 2016-01-25 2016-01-25 helix pipe bending apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160008963A KR101874569B1 (en) 2016-01-25 2016-01-25 helix pipe bending apparatus

Publications (2)

Publication Number Publication Date
KR20170088713A true KR20170088713A (en) 2017-08-02
KR101874569B1 KR101874569B1 (en) 2018-07-04

Family

ID=59651819

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160008963A KR101874569B1 (en) 2016-01-25 2016-01-25 helix pipe bending apparatus

Country Status (1)

Country Link
KR (1) KR101874569B1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109127804A (en) * 2018-09-27 2019-01-04 吉林大学 A kind of bend molding apparatus and its forming method of metal pipe material
CN111360111A (en) * 2020-04-10 2020-07-03 郑州铁头机械科技有限公司 Equipment for automatically bending steel pipe
KR102187319B1 (en) * 2019-10-21 2020-12-04 조진수 Pipe bending machine for fence decoration
CN113619087A (en) * 2021-07-07 2021-11-09 岳阳高澜节能装备制造有限公司 Pipeline bending device capable of preventing port from deforming
KR20230035907A (en) * 2021-09-06 2023-03-14 동의대학교 산학협력단 Pipe bending device to improve pipe quality

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109127804A (en) * 2018-09-27 2019-01-04 吉林大学 A kind of bend molding apparatus and its forming method of metal pipe material
KR102187319B1 (en) * 2019-10-21 2020-12-04 조진수 Pipe bending machine for fence decoration
CN111360111A (en) * 2020-04-10 2020-07-03 郑州铁头机械科技有限公司 Equipment for automatically bending steel pipe
CN113619087A (en) * 2021-07-07 2021-11-09 岳阳高澜节能装备制造有限公司 Pipeline bending device capable of preventing port from deforming
CN113619087B (en) * 2021-07-07 2023-09-29 岳阳高澜节能装备制造有限公司 Pipeline bending device capable of preventing port from deforming
KR20230035907A (en) * 2021-09-06 2023-03-14 동의대학교 산학협력단 Pipe bending device to improve pipe quality

Also Published As

Publication number Publication date
KR101874569B1 (en) 2018-07-04

Similar Documents

Publication Publication Date Title
KR101874569B1 (en) helix pipe bending apparatus
JP3550366B2 (en) Bending machine for strips such as pipes, bars, profiles, metal wires, etc.
JP5838214B2 (en) Spin molding process and apparatus for manufacturing articles by spin molding
CN101585062B (en) Method and corresponding intrument for bending pipe fitting, bar, profiled section and similar blanks
EP3225321A1 (en) Method for manufacturing steel pipe and press mold used in said method
US7104100B2 (en) Bending device for tube
KR101322482B1 (en) Flexible three-dimensional work-piece forming equipment
CN109807208B (en) Variable-bending-diameter thin-wall pipe bending forming device for multi-roller envelope forming
WO2012015009A1 (en) Apparatus for manufacturing coil spring
KR101755371B1 (en) pipe bending apparatus
KR101648174B1 (en) helix pipe bending apparatus
JP5042059B2 (en) Aging device and aging method for flexible tube for endoscope
JP2008168300A (en) Method and apparatus for manufacturing spiral pipe
US20150198351A1 (en) Multi-shaft bending machine for bending rectangular duct body
JP2010188406A (en) Pipe bending apparatus and method
KR101032970B1 (en) Device of producing fin tube
JP2017189790A (en) End part press flexure device
CN107116115A (en) A kind of sigmoid curve bend pipe process equipment
KR100812244B1 (en) Straightening machine for polygonal metal rod and tube
US3857266A (en) Rotary arbor wire straightener
KR100393896B1 (en) Straitening fixture of a wire and a pipe
JP2003126916A (en) Production method and equipment for pipe with helical groove
KR100494241B1 (en) The equipment and method formation of taper roller
CN214814391U (en) Sine straightening device for induction heating of titanium alloy wire
KR100873853B1 (en) Shape deformation unit for pipe and shape deformation apparatus having the same

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant