WO2023022532A1 - Tuyau de raccord pour un soudage automatique - Google Patents

Tuyau de raccord pour un soudage automatique Download PDF

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Publication number
WO2023022532A1
WO2023022532A1 PCT/KR2022/012322 KR2022012322W WO2023022532A1 WO 2023022532 A1 WO2023022532 A1 WO 2023022532A1 KR 2022012322 W KR2022012322 W KR 2022012322W WO 2023022532 A1 WO2023022532 A1 WO 2023022532A1
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WO
WIPO (PCT)
Prior art keywords
pipe
fitting
automatic welding
fitting body
opening
Prior art date
Application number
PCT/KR2022/012322
Other languages
English (en)
Korean (ko)
Inventor
이상헌
Original Assignee
(주)뉴아세아
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
Priority claimed from KR1020220102592A external-priority patent/KR20230026960A/ko
Application filed by (주)뉴아세아 filed Critical (주)뉴아세아
Publication of WO2023022532A1 publication Critical patent/WO2023022532A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles

Definitions

  • the present invention relates to a fitting pipe applied to automatic welding, and more particularly, to be welded with an automatic welding machine without the need for machining such as a chamfer surface at each end of a pipe to be connected and welded to each other. It relates to a fitting pipe for automatic welding manufactured by strictly managing the verticality and roundness of the end welded to the pipe.
  • fitting pipes such as elbows or tees, which are pipe bends
  • pipe joint connectors used by being connected to a position where the flow direction of a fluid such as liquid or gas flowing inside the pipe is changed, and is molded into various angular shapes. In order to do so, it is manufactured by bending a metal pipe material.
  • the bend pipe means 'a pipe bent in the shape of an elbow' in the dictionary meaning, and is called an elbow.
  • the bend pipe means 'a pipe bent in the shape of an elbow' in the dictionary meaning, and is called an elbow.
  • the process of manufacturing an elbow includes a bending step of bending a straight metal pipe, a first pipe expansion step of putting the bent metal pipe into the primary expander and expanding the pipe, and putting the first expanded metal pipe into the secondary expander. It may consist of a secondary expansion process to expand the tube.
  • the elbow manufactured in this way can be used as a pipe fitting for a metal pipe.
  • Patent Document 1 KR10-1640538 B1
  • the technical problem to be solved by the present invention is the verticality and roundness of the end of the connected pipe and the end to be welded so that the end of the connected pipe and the welded portion are welded with an automatic welding machine without the need for machining such as chamfering. It is intended to provide a fitting pipe for automatic welding that is manufactured by strictly managing.
  • a fitting pipe for automatic welding according to the present invention for solving the above technical problem includes a fitting body having an open opening at an end corresponding to an open end of a connected pipe, and an end of the opening is the blood It is formed on a plane to form a vertical or horizontal joint surface in contact with the open end of the connecting pipe, and a welding bead is formed by an automatic welding machine along the vertical or horizontal joint surface to be welded to the connected pipe. .
  • the first off distance formed between a tangent line contacting the end of the opening of the fitting body and a vertical line intersecting at right angles to the center line of the fitting body may be set to 1.0 mm or less.
  • the second off distance formed between a vertical line passing through the center of the body of the fitting body and a vertical axis passing through the center of the opening of the fitting body may be set to 1.0 mm or less.
  • the fitting body may be molded and manufactured by processing a metal raw material having a thickness of 2 mm or more.
  • the fitting pipe for automatic welding of the present invention having the above-described configuration forms the end of the opening of the fitting body that abuts each end of the pipe to be connected with each other on a plane perpendicular to the machining process, which is a preceding step for forming the chamfered surface. It is fundamentally excluded to reduce manufacturing cost, and it is possible to more efficiently perform an operation of welding the fitting body and the connected pipe to each other by an automatic welding machine.
  • 1 is a configuration diagram showing butt welding between a general elbow fitting pipe and a connected pipe.
  • FIG. 2 is a configuration diagram showing butt welding between a fitting pipe for automatic welding and a connected pipe according to an embodiment of the present invention.
  • 3A and 3B are front and side views showing tolerances of a fitting tube for automatic welding according to an embodiment of the present invention.
  • 4a, 4b, 4c and 4c are schematic diagrams illustrating a process of manufacturing an elbow pipe from a fitting pipe for automatic welding according to an embodiment of the present invention in a forming device.
  • 5A and 5B are schematic views illustrating a process of manufacturing a fitting pipe for automatic welding according to an embodiment of the present invention into a tee pipe in another molding apparatus.
  • FIGS. 3A and 3B are allowable tolerances of a fitting pipe for automatic welding according to an embodiment of the present invention. It is a front view and a side view showing.
  • a fitting pipe E for automatic welding includes a fitting body 10 having a substantially circular opening 10a opened at one end corresponding to the open end of the connected pipe 20. can do.
  • the fitting body 10 may be made of a hollow tube made of a metal material whose body is bent at an angle of about 90° or a hollow tube made of a metal material whose body is formed in an approximate T shape.
  • the central opening may be formed and processed by an elbow forming device or a tee forming device to be described later to have the same inner and outer diameters.
  • These openings 10a come into contact with the open ends of the connected pipes 20 facing each other during automatic welding by an automatic welding machine (not shown) to form a substantially vertical or substantially horizontal joint surface such as a chamfered surface. It may be formed on a plane that is not formed.
  • the end of the open opening 10a of the fitting body 10 may be formed as a vertical surface or a horizontal surface intersecting at right angles to a center line extending from the center of the opening.
  • the end of the open opening 10a of the fitting body 10 and the end in contact with the open end of the connected pipe 20 are vertical or horizontal without forming an inclined surface such as a chamfered surface by the automatic welding machine.
  • a bonding surface can be formed.
  • the end of the fitting body 10 and the end of the connected pipe 20 are connected to each other by forming a welding bead B while performing automatic welding along the circumference of the vertical or horizontal joint surface using an automatic welding machine. Can be welded together.
  • the welding bead (B) integrates the joint surface between the vertical or horizontal end of the fitting body (10) and the end of the connected pipe (20) and integrates the open end of the fitting body (10) with the connected pipe (20). It is a weld metal that is melt-joined to the outer surface of the fitting body and the outer surface of the pipe to be connected along the circumference so as to weld the open ends of (20) to each other.
  • a first offset distance formed between a tangent line X1 contacting the end of the opening 10a of the fitting body 10 and a vertical line X2 crossing the center line of the fitting body 10 at right angles ( X) is preferably set to approximately 1.0 mm or less.
  • a second offset distance (Y) formed between a vertical line (Y1) passing through the center of the body of the fitting body (10) and a vertical axis (Y2) passing through the center (O) of the opening of the fitting body (10) is preferably set to approximately 1.0 mm or less.
  • the first and second off distances (X, Y) are such that the opening end of the fitting body 10 is aligned with the vertical line (X2) or the vertical axis (Y2). It is preferable to manage the dimensions from 0 coincident with 1.0 mm or less, which is a distance away from the vertical line or vertical axis.
  • 4a, 4b, 4c, and 4d are schematic diagrams illustrating a process of manufacturing an elbow pipe from a fitting pipe for automatic welding according to an embodiment of the present invention in a forming device.
  • the automatic welding fitting pipe E having the above configuration includes upper and lower molds 100 and 200, a mandrel 300 and a pusher 400.
  • a tee forming device including upper and lower molds 100a and 200b, a pair of left and right pushers 400a and an upper pusher 400c It can be manufactured in the form of a tee tube by.
  • the process of manufacturing an elbow-shaped fitting tube is to precisely cut a line C at both ends of a hollow pipe having a certain length using a cutting machine such as a laser cutter to a preset design value.
  • a cutting machine such as a laser cutter to a preset design value.
  • the length of the hollow pipe cut along the cutting line (C) has a tolerance of about 2 to 3 mm in consideration of elastic deformation and shrinkage deformation during molding of the pipe-shaped raw material (P) by the elbow forming device. It is preferable to set large to have.
  • the upper mold 200 is moved upward to a certain height relative to the lower mold 100, and the mandrel 300 is disposed on the curved path of the lower mold 100, and both ends are
  • the pipe-shaped raw material P which is cut obliquely at a certain angle and has a substantially trapezoidal cross-section, is placed and placed at the entrance of the lower mold 100 corresponding to the pusher.
  • the pipe-shaped raw material P is vertically combined by the forward operation of the pusher 400.
  • a hollow cavity capable of entering and moving toward the mandrel is formed inside the upper and lower molds.
  • the pipe-shaped raw material P is forced into the gap formed between the inner surfaces of the upper and lower molds 100 and 200 and the outer surface of the mandrel 300. While being deformed into the same curved shape as the outer surface of the mandrel, the fitting body 10 is formed.
  • the pipe-shaped raw material (P) may be a metal material having a thickness of 2 mm or more, and the fitting body 10 is molded and manufactured by processing such a pipe-shaped raw material (P).
  • the upper mold 200 is raised and returned together with the mandrel 300 inserted into the outer surface of the fitting body 10, and then the fitting body 10 is lifted and returned.
  • the ends of the openings 10a on both sides coincide with the imaginary intersection line that intersects the center line of the opening at a substantially right angle, and the elbow-shaped fitting pipe E formed on a vertical or horizontal plane is manufactured.
  • the fitting pipe E formed by the elbow forming device is stored in the fitting pipe before being shipped to the outside by the correction block 500 or the upper and lower correction molds 600.
  • a process of calibrating the curvature of the bent portion formed to be bent and the inner diameter of both open ends of the fitting pipe to match a preset design value may be performed.
  • a correction block 500 is prepared in which a curved curved groove 505 into which the bending part is inserted is recessed on the upper surface corresponding to the bending part of the fitting pipe E.
  • a pair of internal diameter correction jigs 501 disposed facing both open ends of the fitting tube E in a state where the bending portion corresponding to the middle of the length of the fitting tube E is inserted into the curved groove of the correction block By forcibly entering the ends into the inside of both open ends of the fitting pipe (E) by the pressing force of an unshown hydraulic device, the inner surface of the both open ends of the fitting pipe (E) is the inner diameter of the opening end of the fitting pipe (E) set in advance. In contact with the outer surface of the end of the inner diameter correction jig 501 manufactured to match, it can be calibrated to the inner diameter size corresponding to the inner diameter design value of the fitting pipe.
  • the curved end of the curvature correction jig 502 disposed facing the bent portion of the fitting tube E disposed in the curved curved groove of the correction block 500 is pressed by a hydraulic device, not shown.
  • the inner bending part of the fitting pipe is in contact with the outer curved end of the curvature correction jig 502 manufactured to match the curvature size of the bending part of the fitting pipe set in advance, and the fitting pipe is calibrated to a curvature corresponding to the curvature design value of, and the outer bending portion of the fitting pipe is in contact with the inner surface of the curved curved groove made to match the curvature size of the bending portion of the fitting pipe set in advance, and the curvature design value of the fitting pipe It can be corrected with a corresponding curvature.
  • upper and lower orthodontic molds 600 and 700 in which upper and lower curved grooves 601 and 701 in which the bending parts are inserted and disposed are respectively recessed are prepared on the upper and lower surfaces corresponding to the bending parts of the fitting pipe E. .
  • Upper and lower curved grooves may be calibrated to a curvature corresponding to the design value of the curvature of the fitting tube as the inner and outer surfaces come into contact with each other and are pressed.
  • 5A and 5B are schematic views illustrating a process of manufacturing a fitting pipe for automatic welding according to an embodiment of the present invention into a tee pipe in another molding apparatus.
  • the upper mold 200a is first moved upward to a certain height with respect to the lower mold 100a, and the lower mold 100a The openings on both sides of the pipe-shaped raw material P1 formed in the shape of a tee at the top are seated and prepared so that they face the pair of left and right pushers 400a.
  • the raw material P1 may be a metal material having a thickness of 2 mm or more, and the fitting body 10 is molded and manufactured by processing the raw material P1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

La présente invention concerne un tuyau de raccord pour un soudage automatique, et plus spécifiquement un tuyau de raccord pour un soudage automatique avec lequel il n'est pas nécessaire d'usiner une surface chanfreinée aux parties où les extrémités de tuyaux respectifs à raccorder sont en butée les unes contre les autres et sont soudées, en gérant rigoureusement la verticalité d'une partie d'extrémité soudée avec un tuyau à raccorder, de façon à pouvoir souder avec une soudeuse automatique. À cet effet, le tuyau de raccord pour un soudage automatique, selon la présente invention, comprend un corps de raccord ayant des ouvertures à chaque extrémité de celui-ci correspondant aux parties d'extrémité ouvertes de tuyaux à raccorder, l'extrémité d'une ouverture étant amenée en contact avec une partie d'extrémité ouverte d'un tuyau à raccorder, l'extrémité de l'ouverture étant formée de façon à avoir une forme de surface plate pour former une surface de jonction verticale ou horizontale, et des cordons de soudure étant formés, au moyen d'une soudeuse automatique, le long de la surface de jonction verticale ou horizontale, et ainsi le tuyau de raccord pouvant être soudé et relié au tuyau à raccorder.
PCT/KR2022/012322 2021-08-18 2022-08-18 Tuyau de raccord pour un soudage automatique WO2023022532A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2021-0108435 2021-08-18
KR20210108435 2021-08-18
KR1020220102592A KR20230026960A (ko) 2021-08-18 2022-08-17 자동용접용 피팅관
KR10-2022-0102592 2022-08-17

Publications (1)

Publication Number Publication Date
WO2023022532A1 true WO2023022532A1 (fr) 2023-02-23

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Application Number Title Priority Date Filing Date
PCT/KR2022/012322 WO2023022532A1 (fr) 2021-08-18 2022-08-18 Tuyau de raccord pour un soudage automatique

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KR (1) KR20240010520A (fr)
WO (1) WO2023022532A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5539177A (en) * 1993-10-27 1996-07-23 Kabushiki Kaisha Kobe Seiko Sho Method of and apparatus for overlap welding of the inner surface of an elbow pipe
JP2002224840A (ja) * 2001-01-29 2002-08-13 Kawasaki Steel Corp オープンパイプの溶接方法
JP4682780B2 (ja) * 2005-09-30 2011-05-11 Ｊｆｅスチール株式会社 溶接部特性の良好な電縫管製造方法
KR20130135608A (ko) * 2012-06-01 2013-12-11 현대중공업 주식회사 스테인리스 피팅의 용접방법
KR20160128909A (ko) * 2015-04-29 2016-11-08 주식회사 우신이엠시 하이브리드 드라이브 샤프트 및 그 제조방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5539177A (en) * 1993-10-27 1996-07-23 Kabushiki Kaisha Kobe Seiko Sho Method of and apparatus for overlap welding of the inner surface of an elbow pipe
JP2002224840A (ja) * 2001-01-29 2002-08-13 Kawasaki Steel Corp オープンパイプの溶接方法
JP4682780B2 (ja) * 2005-09-30 2011-05-11 Ｊｆｅスチール株式会社 溶接部特性の良好な電縫管製造方法
KR20130135608A (ko) * 2012-06-01 2013-12-11 현대중공업 주식회사 스테인리스 피팅의 용접방법
KR20160128909A (ko) * 2015-04-29 2016-11-08 주식회사 우신이엠시 하이브리드 드라이브 샤프트 및 그 제조방법

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