KR101528155B1 - Press bending device for producing welded pipe - Google Patents

Press bending device for producing welded pipe Download PDF

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Publication number
KR101528155B1
KR101528155B1 KR1020140082023A KR20140082023A KR101528155B1 KR 101528155 B1 KR101528155 B1 KR 101528155B1 KR 1020140082023 A KR1020140082023 A KR 1020140082023A KR 20140082023 A KR20140082023 A KR 20140082023A KR 101528155 B1 KR101528155 B1 KR 101528155B1
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KR
South Korea
Prior art keywords
outlet
inlet
support
steel pipe
frame
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KR1020140082023A
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Korean (ko)
Inventor
백승태
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(주)재원산업기계
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Priority to KR1020140082023A priority Critical patent/KR101528155B1/en
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Publication of KR101528155B1 publication Critical patent/KR101528155B1/en

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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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/10—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
    • B21D5/12—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers

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

Abstract

The present invention relates to a press-bending device forming a welding pipe using a plate as a raw material comprising: a body (20) with a movable mold (22) and a punch (26) on a frame (21); an inlet supporter (30) connected to one side of the frame (21) to be able to rotate, including a hydraulic cylinder (35) to adjust an inclined angle; an outlet supporter (40) connected to the other end side of the frame (21) to be able to rotate, including a hydraulic cylinder (45) to adjust an inclined angle; and a control means (50) changing the inclined angles of the inlet supporter (30) and the outlet supporter (40) in correspondence to a forming process of the body (20). The control means (50) is characterized by including touch sensors (52) installed in the inlet and outlet supporters (30, 40); a linear sensor (54) installed in the hydraulic cylinders (35, 45); and a controller (56) applying power to the hydraulic cylinders (35, 45) using an algorithm set by receiving signals of the sensors. Accordingly, the present invention is capable of improving quality stability and productivity by automating a major process of manufacturing a large-diameter thick-wall welding pipe, and obtains an effect of improving working conditions for a heavy-object processing process to be pleasant.

Description

TECHNICAL FIELD [0001] The present invention relates to a press bending apparatus for a welded steel pipe forming machine,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welded steel pipe forming machine, and more particularly, to a press bending mechanism of a welded steel pipe forming machine for bending a plate material to be introduced into a field line in a predetermined order.

Welded steel pipes are collectively referred to as pipes having parallel or spiral welds parallel to the tube axis. They are manufactured by forming the steel or steel plate into a cylindrical shape and then welding or cutting the butt joints of the edges.

In general, large-diameter steel pipe with a diameter of 500 mm or more is manufactured by spiral forming, bending roll forming, gauge roll forming, U.O.E press method, etc., and submerged arc welding is mainly used as a method of joining the butt joint. Major applications include piping such as sewer pipes and oil pipelines, and structural use such as steel pipe piles for bridges and harbors.

As a prior art document related to the automation of such a welded steel pipe manufacturing process, Japanese Unexamined Patent Publication (Kokai) No. 57-36092 discloses a part including a punch 3 on which an upper body 1 for molding is mounted and a lower body A mechanism for bending the end portion of the plate by punching up and down, and a mechanism for bending the lower plate spaced apart by 180 ° corresponding to the punch interval, and moving the punch The end of the plate is pressed to weld the butt joint.

However, according to the above-mentioned prior patent, since it is applied to a pipe having a small diameter in addition to a large diameter, it is insufficient to form a heavy wall thickness pipe and shows a limit to apply to a very large steel pipe having a pipe diameter exceeding 4,000 mm.

1. Japanese Unexamined Patent Publication No. 57-36092 "Method of manufacturing a metal welded pipe and its apparatus" (published on Feb. 2, 1982)

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned problems of the prior art by providing a press bending mechanism of a welded steel pipe forming machine capable of automating main processes related to manufacturing a large diameter welded steel pipe, .

Another object of the present invention is to alleviate a shock vibration and noise generated in the process of forming a welded steel pipe, thereby reducing defects due to product damage and aiming at comfort in a heavy work environment.

In order to accomplish the above object, the present invention provides a press bending mechanism for forming a welded steel pipe from a plate material as a raw material; A body having a movable mold and a punch on a frame; An inlet support pivotally connected to one side of the frame and having a hydraulic cylinder for adjusting the tilt angle; An outlet support member rotatably connected to the other side of the frame and having a hydraulic cylinder for adjusting the inclination angle; And control means for varying the inclination angle of the inlet support and the outlet support corresponding to the molding process of the main body.

According to the detailed construction of the present invention, the movable mold of the main body is provided with a pair of opposing rollers rotatably and movably.

At this time, the mold is positively accommodated between the opposed rollers.

According to the detailed construction of the present invention, the inlet support and the outlet support are provided with a buffer to prevent impact and scratches during the molding process of the plate.

As a modification of the present invention, the inlet support and the outlet support are further provided with a guide bar that is movable to support both ends of the plate and guide the plate to the correct position.

According to a detailed configuration of the present invention, the control means includes a touch sensor provided on a support, a linear sensor provided on a hydraulic cylinder, and a controller for receiving an input of a sensor signal and applying an output to a hydraulic cylinder with a predetermined algorithm .

In this case, the touch sensor of the control means is provided at a plurality of points on the support so as to recognize the contact state of the plate material during molding.

Industrial Applicability As described above, according to the present invention, it is possible to automate the main processes for manufacturing the welded steel pipe of the large diameter hosiery, thereby improving the quality stability and greatly improving the productivity by reducing the impact noise during the bending work, have.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a plan view generally showing a press bending mechanism according to the present invention;
Figure 2 is an elevation view generally showing a press bending mechanism according to the present invention;
Fig. 3 is a plan view schematically showing the main part of Fig. 1
FIG. 4 is a configuration diagram showing a portion cut along AA 'of FIG. 3
5 is a configuration diagram showing an operating state of a press bending mechanism according to the present invention;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention proposes a press bending mechanism for forming a welded steel pipe from a sheet material as a raw material. The plate material used as the raw material for the welded steel pipe is not limited to the rolled steel sheet of the beef cut to a certain size. As an example of application to the aftermarket steel pipe, the line pipe for transporting crude oil and natural gas is useful for preventing deformation due to earthquake or crustal change.

According to the present invention, the main body 20 is characterized by a structure having a movable mold 22 and a punch 26 on a frame 21. [ The main body 20 is disposed between an inlet conveyor 12 for introducing the sheet material and an outlet conveyor 14 for discharging the welded steel pipe. The movable mold 22 supports the plate material on the bottom surface and the punch 26 performs up and down movement on the upper side of the movable mold 22. [

The movable mold 22 and the punch 26 are provided at a length corresponding to the width of the sheet material to be fed. The punch 26 is connected to a press apparatus (not shown) of high load (for example, 8000 tons) so as to press the plate material of the bottom plate to cause plastic deformation.

According to the detailed configuration of the present invention, the movable mold (22) of the main body (20) is provided with a pair of opposed rollers (23) rotatably and movably.

The roller 23 is provided so as to face the inside of the frame 21 and performs bending of the plate material together with the punch 26 that descends from the upper side. The rollers 23 are connected to each other by a separate motor so that the sheet material can be conveyed in the longitudinal direction.

At this time, the mold 24 is accommodated between the facing rollers 23 so that the mold 24 can be positively fluctuated.

The mold 24 supports the curved surface of the sheet material during the sintering process by the roller 23 and the punch 26.

The attitude change of the mold 24 is a motion including the inclination of the upper surface, the height adjustment of the upper and lower sides, and the like.

On the other hand, the exit conveyor 14 may use the carrier 16 to move the finished product of the welded steel pipe to the set position.

According to the present invention, the inlet support 30 is rotatably connected to one side of the frame 21 and has a hydraulic cylinder 35 for adjusting the inclination angle. The inlet support 30 is rotatably connected to one side of the frame 21 via a hinge 31. [ The hydraulic cylinder 35 is installed in a four-bar link structure by a hinge so as to move the inlet support 30 to a predetermined rotation stroke stage.

In addition, according to the present invention, an outlet support base 40 is rotatably connected to the other side of the frame 21, and a hydraulic cylinder 45 for adjusting the inclination angle is provided.

The outlet support base 40 is rotatably connected to the other side of the frame 21 via a hinge 41. The hydraulic cylinder 45 is installed in a four-bar linkage structure by a hinge so as to move the inlet support 40 to a predetermined rotation stroke stage.

In Fig. 1, an inlet support 30 is associated with an inlet conveyor 12 and an outlet support 40 is arranged in conjunction with an outlet conveyor 14. In Fig. The plate inserted into the inlet conveyor 12 is easily loaded into the inlet support 30 and the steel pipe completed in the main body 20 is easily loaded into the carrier 16 from the outlet support 40. [ Since the required area (length) at the exit side is first reduced during the plastic deformation of the plate material, the exit support rods 40 may be shorter than the entrance support rods 30.

In Fig. 2, the reference numerals 30 and 40 of the two side supports 30 and 40 denote an up-stroke stage and reference numerals 30 'and 40' denote down-stage stages. It is useful for loading / unloading the sheet material to the entrance conveyor 12 and the exit conveyor 14 that the lowering stroke end is turned in an inclined state lower than the horizontal plane.

According to the detailed construction of the present invention, the inlet support 30 and the outlet support 40 are provided with buffering parts 33 and 43 to prevent impact and scratching during the molding process of the plate. The buffer beds (33) and (43) require a buffering property and a wear resistance in addition to the strength to withstand high loads. If defects such as scratches occur during the plastic deformation of the plate material, there is a fear that the air flow increases in the post-treatment, as well as the deformation is concentrated and the buckling resistance is weakened.

As a modification of the present invention, the inlet support 30 and the outlet support 40 further include guide bars 37 (47) that are movable to guide the plate material to the correct positions at both ends. The guide bars 37 and 47 are configured to move the brackets on the supports 30 and 40 to one end and the other end. On the bracket of the guide bars 37 and 47, a clamp for supporting the end portion of the plate material may be provided.

According to the present invention, the control means (50) is characterized by a structure in which the inclination angles of the inlet support (30) and the outlet support (40) vary in response to the molding process of the main body (20). The control means 50 is connected to the inlet conveyor 12, the inlet support 30, the movable mold 22 of the main body 20 and the punch 26, the outlet support 40 and the outlet conveyor 14 Thereby inducing automatic movement and molding of the sheet material. Particularly, the inclination angle variation of the entrance support 30 and the exit support 40 is an important part of the automation process.

According to the detailed configuration of the present invention, the control means 50 includes a touch sensor 52 installed on the supports 30 and 40, a linear sensor 54 installed on the hydraulic cylinders 35 and 45, And a controller (56) for receiving an input of a signal from the hydraulic cylinder (35) and applying an output to the hydraulic cylinder (35) (45) with an established algorithm.

The touch sensor 52 is installed on the inlet support 30 and the outlet support 40, respectively, and generates a signal as to whether or not the plate contacts.

The touch sensor 52 can be selected from one or more of a pressure sensor, a proximity sensor, and an optical sensor.

The linear sensor 54 is installed in the hydraulic cylinder 35 and the hydraulic cylinder 45, respectively, and generates a signal about the position of the operating rod.

The controller 56 is composed of a microprocessor, a memory, and a microcomputer circuit including an input / output interface. The program having the operating algorithm of the present invention is loaded into the memory of the controller 56. [

At this time, the touch sensor 52 of the control means 50 is provided at a plurality of points on the supports 30 and 40 so as to recognize the contact state of the plate material during molding. The plurality of points mean that they are installed in a matrix structure over the length and width of the supports 30 and 40. This is in consideration of the fact that the size of the plate material varies depending on the diameter of the welded steel pipe to be manufactured.

5, the both side supports 30 and 40 load the plate material in the horizontal state of the reference numerals 30a and 40a, and the right end of the plate is placed on the movable die 22 while the punch 26 Both sides are inclined about the punch 26 by the plastic deformation of the plate material and the both supports 30 and 40 are moved to the positions 30b and 40b by the operation of the hydraulic cylinders 35 and 45 When the contact is sensed by the touch sensor 52, the rotation of both the support rods 30 and 40 is stopped and the support rods 30 and 40 are moved to the positions 30a and 40a When the plate material is held in a stable position on the horizontal plane, the workpiece is transferred to the right side to vary the processing position. When the left end is laid on the movable mold 22, plastic deformation is performed in the same process as the above- , And plastic deformation is performed in a state where the center of the plate is again spread over the movable mold (22).

In this manner, a welded steel pipe having a butt joint at its edge is formed while pressing the right end, the left end, and the center of the raw material of the plate sequentially. In this process, when both supports 30 and 40 are not used, the sheet material is optionally rolled due to its own weight at the instant of elevation after pressing of the punch 26, so that vibration and noise are caused by the impact. The present invention can maintain a stable posture in which the support rods 30 and 40 are rotated in close contact regardless of the changing shape during plastic deformation of the plate material so as to significantly reduce the operating noise.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. It is therefore intended that such variations and modifications fall within the scope of the appended claims.

12, 14: Conveyor 16: Carrier
20: main body 21: frame
22: movable mold 23: roller
24: mold 26: punch
30: inlet support 31, 41: hinge
33, 43: Buffer 35, 45: Hydraulic cylinder
37, 47: guide base 40: exit support base
50: control means 52: touch sensor
54: Linear sensor 56: Controller

Claims (7)

A press bending mechanism for forming a welded steel pipe using a plate material as a raw material, comprising:
A main body 20 having a movable mold 22 and a punch 26 on a frame 21;
An inlet support 30 rotatably connected to one side of the frame 21 and having a hydraulic cylinder 35 for adjusting the inclination angle;
An outlet support rod (40) rotatably connected to the other side of the frame (21) and having a hydraulic cylinder (45) for adjusting the inclination angle; And
And control means (50) for varying the inclination angle of the inlet support (30) and the outlet support (40) in response to the molding process of the main body (20)
The control means 50 includes a touch sensor 52 mounted on the inlet and outlet support members 30 and 40, a linear sensor 54 mounted on the hydraulic cylinders 35 and 45, And a controller (56) for applying an output to the hydraulic cylinders (35) (45) in accordance with a set algorithm. The method according to claim 1,
Wherein the movable mold (22) of the main body (20) comprises a pair of opposed rollers (23) rotatably and movably. The method of claim 2,
And a mold (24) is accommodated between the opposing rollers (23) so as to be capable of attitude change. The method according to claim 1,
Wherein the inlet support (30) and the outlet support (40) are provided with buffering parts (33, 43) to prevent impact and scratching during the molding process of the plate material. The method according to claim 1,
Wherein the inlet support base (30) and the outlet support base (40) further include guide bars (37) (47) that are movable to support both ends of the plate material and guide the plate material into a proper position. The method according to claim 1,
The main body 20 is disposed between an inlet conveyor 12 for introducing the sheet material and an outlet conveyor 14 for discharging the steel pipe and the outlet conveyor 14 is provided with a carrier 16 for moving the steel pipe A press bending mechanism of a welded steel pipe forming machine. The method according to claim 1,
Characterized in that the touch sensor (52) of the control means (50) is provided at a plurality of points on the inlet and outlet supports (30, 40) to recognize the contact state of the plate material being formed. .
KR1020140082023A 2014-07-01 2014-07-01 Press bending device for producing welded pipe KR101528155B1 (en)

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KR1020140082023A KR101528155B1 (en) 2014-07-01 2014-07-01 Press bending device for producing welded pipe

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102208184B1 (en) * 2020-08-05 2021-01-27 주식회사 현대알비 A steel tube banding apparatus for shock absorption and steel tube discharge apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120077113A (en) * 2010-12-30 2012-07-10 대우조선해양 주식회사 Shape fitting type plate supporting apparatus for curvature forming system
JP2012210650A (en) * 2011-03-31 2012-11-01 Komatsu Ltd Bending device of steel plate, bending method and bending program
JP2012250285A (en) * 2011-05-31 2012-12-20 Sms Meer Gmbh Method of and device for producing slit tube from plate material
KR101363722B1 (en) * 2013-05-08 2014-02-14 주식회사 티엠씨 Apparatus and method for forming large corrugation of membrane sheet for liquified natural gas storage tank

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120077113A (en) * 2010-12-30 2012-07-10 대우조선해양 주식회사 Shape fitting type plate supporting apparatus for curvature forming system
JP2012210650A (en) * 2011-03-31 2012-11-01 Komatsu Ltd Bending device of steel plate, bending method and bending program
JP2012250285A (en) * 2011-05-31 2012-12-20 Sms Meer Gmbh Method of and device for producing slit tube from plate material
KR101363722B1 (en) * 2013-05-08 2014-02-14 주식회사 티엠씨 Apparatus and method for forming large corrugation of membrane sheet for liquified natural gas storage tank

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102208184B1 (en) * 2020-08-05 2021-01-27 주식회사 현대알비 A steel tube banding apparatus for shock absorption and steel tube discharge apparatus

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