KR20130135608A - Welding method of stainless fitting - Google Patents

Welding method of stainless fitting Download PDF

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Publication number
KR20130135608A
KR20130135608A KR1020120059331A KR20120059331A KR20130135608A KR 20130135608 A KR20130135608 A KR 20130135608A KR 1020120059331 A KR1020120059331 A KR 1020120059331A KR 20120059331 A KR20120059331 A KR 20120059331A KR 20130135608 A KR20130135608 A KR 20130135608A
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South Korea
Prior art keywords
fitting
welding
improvement
improved
fittings
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KR1020120059331A
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Korean (ko)
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안동익
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현대중공업 주식회사
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Priority to KR1020120059331A priority Critical patent/KR20130135608A/en
Publication of KR20130135608A publication Critical patent/KR20130135608A/en

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    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/02—Seam welding; Backing means; Inserts
    • B23K9/035—Seam welding; Backing means; Inserts with backing means disposed under the seam
    • 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
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/02—Carriages for supporting the welding or cutting element
    • B23K37/0276—Carriages for supporting the welding or cutting element for working on or in tubes
    • 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
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/06—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for positioning the molten material, e.g. confining it to a desired area

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Arc Welding In General (AREA)

Abstract

The present invention relates to a method for welding fittings or the fittings with pipes especially for forming a back bead on the inner circumference by welding one side on the outer circumference of a welding unit without a root gap in the welding unit. The method for welding the fittings, according to the present invention to achieve the purpose, is characterized by including a step of improving the circumference end of a member to which the fitting is welded and the circumference end of the fitting in order for a rood pass to become 0; a step of arranging the improved end of the fitting and the end of the member; and a step of welding an improvement unit of the member and an improvement of the fitting located to be adjacent to each other.

Description

스테인리스 피팅의 용접방법{Welding Method of Stainless Fitting}Welding Method of Stainless Fitting

본 발명은 스테인리스 피팅(Fitting)을 배관 또는 피팅(Fitting)끼리 용접하는 방법에 관한 것으로서, 특히 용접부의 외주면에서 일면 용접으로 내주면에 백비드를 형성할 수 있도록 구성한 것이다.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of welding a stainless steel fitting (Pitting) to pipes or fittings to each other. In particular, the present invention is configured to form a back bead on the inner circumferential surface by one side welding on the outer circumferential surface of the weld portion.

산업현장에서 배관 라인에는 각종 피팅들이 용접 고정된다. 피팅에는 엘보우 (Elbow), 리듀서(Reducer), 티(Tee) 등이 있으며, 이와 같은 피팅을 배관에 용접하기 위해서는 피팅의 용접부를 개선하고 더불어 배관의 단부 또한 개선한다.In the industrial field, various fittings are welded to the pipe line. Fittings include elbows, reducers, tees, and the like. In order to weld such fittings to pipes, the welds of the fittings are improved and the ends of the pipes are also improved.

도면에서, 도 1은 종래 피팅의 개선부와 배관의 개선부를 나타낸 단면도이다.1 is a cross-sectional view showing the improved part of the conventional fitting and the improved part of the piping.

도 1에 도시된 바와 같이, 단부가 개선된 피팅(10)과 배관(20)을 맞대응 시킨 상태에서 개선부(11, 21)의 외주면을 따라 용접한다. 여기에서 종래의 피팅(10) 및 배관(20)의 개선부(11, 21)는 외주면에서 내주면으로 점차 좁아지는 구조의 경사면(13, 23)이 형성되고, 경사면(13, 23)의 하단에는 루트 페이스(Root Face)(15, 25)가 형성된다. As shown in Figure 1, the welded along the outer circumferential surface of the improved parts (11, 21) in a state in which the fitting 10 and the pipe 20 is improved in the end portion. Here, the improved parts 11 and 21 of the conventional fitting 10 and the pipe 20 are formed with inclined surfaces 13 and 23 having a structure that gradually narrows from the outer circumferential surface to the inner circumferential surface, and the lower ends of the inclined surfaces 13 and 23. Root Faces 15 and 25 are formed.

이와 같은 개선부(11, 21)가 형성된 피팅(10)과 배관(20)을 맞대응함에 있어서는, 개선부(11, 21)를 용접하는 중에 용융물이 루트 페이스(15, 25)의 사이를 통과해 내주면에 백비드(30)가 돌출되게 형성되도록 루트 페이스(15, 25)의 사이에는 루트 갭(Root Gap)(19)이 형성되어야 한다.In abutting the fitting 10 and the pipe 20 in which the improvement parts 11 and 21 are formed, the melt passes between the root faces 15 and 25 while welding the improvement parts 11 and 21. A root gap 19 must be formed between the root faces 15 and 25 so that the back bead 30 protrudes on the inner circumferential surface.

이와 같이 루트 갭(19)을 형성하기 위해서는 피팅(10)과 배관(20)을 취부할 때 루트 갭(19)을 균일하게 유지하는 작업이 필요하다는 단점이 있다.As described above, in order to form the root gap 19, there is a disadvantage in that an operation for uniformly maintaining the root gap 19 is required when mounting the fitting 10 and the pipe 20.

한편, 아래의 선행기술문헌인 대한민국 공개특허공보 제2010-0065449호에 언급된 기술은 개선부위를 양면 용접하는 방법으로서, 피팅 및 배관과 같은 부재에서는 양면 용접이 불가함으로써, 선행기술문헌의 기술을 적용할 수 없다는 문제점이 있다.
On the other hand, the technique mentioned in the Republic of Korea Patent Publication No. 2010-0065449, the prior art document below is a method of welding both sides of the improved portion, it is impossible to weld on both sides in the member, such as fittings and pipes, the technique of the prior art document There is a problem that is not applicable.

대한민국 공개특허공보 제2010-0065449호(공개일; 2010.06.17)Republic of Korea Patent Publication No. 2010-0065449 (Publication date: June 17, 2010)

본 발명은 앞에서 설명한 바와 같은 종래 기술의 문제점을 해결하기 위하여 발명된 것으로서, 피팅의 단부와 배관의 단부를 접촉시킨 상태에서 루트갭 없이 피팅의 단부와 배관의 단부의 외주면에서 개선부를 용접하여 내주면에 백비드가 형성되도록 구성한 피팅의 용접방법을 제공하는 데 그 목적이 있다.
The present invention has been invented to solve the problems of the prior art as described above, in the state in which the end of the fitting and the end of the pipe in contact with the inner peripheral surface by welding the improved portion at the outer peripheral surface of the end of the fitting and the end of the pipe without a root gap. It is an object of the present invention to provide a method of welding a fitting configured to form a back bead.

상기와 같은 목적을 달성하기 위한 본 발명에 따른 피팅의 용접방법은 피팅의 원주 단부와 피팅을 용접하고자 하는 부재의 원주 단부를 개선하는 단계, 개선된 피팅의 단부와 부재의 단부를 접하도록 배치하는 단계와, 접해 위치한 피팅의 개선부와 부재의 개선부를 용접하는 단계를 포함하는 것을 기술적 특징으로 한다.The welding method of the fitting according to the present invention for achieving the above object is to improve the circumferential end of the fitting and the circumferential end of the member to be welded, the end of the improved fitting and the end of the member is disposed And welding the improved portion of the fitting and the improved portion of the member positioned adjacent thereto.

또한, 본 발명의 바람직한 실시예에 따르면, 개선하는 단계에서는 스테인리스 피팅 루트 패이스를 0으로 가공하여 외주면에서 내주면까지 V형태의 경사면으로만 형성되도록 개선한다.In addition, according to a preferred embodiment of the present invention, in the step of improving, the stainless fitting root face is processed to 0 to be improved to be formed only in the inclined surface of the V shape from the outer peripheral surface to the inner peripheral surface.

또한, 본 발명의 바람직한 실시예에 따르면, 피팅의 단부와 부재의 단부가 접하였을 때에 개선부는 V형태로 형성되고, 개선부 안쪽을 용접하였을 때에 용융물은 상호 접해 위치한 피팅 및 부재의 내주면을 용융시켜 내주면에 백비드를 형성한다.
Further, according to a preferred embodiment of the present invention, when the end of the fitting and the end of the member are in contact with each other, the improvement part is formed in a V shape, and when the inside of the improvement part is welded, the melt melts the inner circumferential surfaces of the fitting and the member which are in contact with each other. A back bead is formed on the inner circumferential surface.

앞서 설명한 바와 같이, 본 발명에 따른 피팅의 용접방법은 피팅의 단부와 배관의 단부를 접촉시킨 상태에서 용접이 이루어짐에 따라 종래와 같이 피팅과 배관 사이의 루트 갭(Root Gap)을 형성하기 위한 정밀 작업이 필요치 않아 편리하다는 장점이 있다.As described above, the welding method of the fitting according to the present invention is precision for forming a root gap between the fitting and the pipe as the conventional welding as the welding is made in contact with the end of the fitting and the end of the pipe. It is convenient because there is no work required.

또한, 본 발명에 따른 피팅의 용접방법은 피팅 및 배관의 개선부가 경사면만 형성됨에 따라 종래와 같이 루트 페이스(Root Face)를 감안하여 용접할 때 보다 편리하다는 장점이 있다.
In addition, the welding method of the fitting according to the present invention has an advantage that when the improved part of the fitting and the pipe is formed only the inclined surface when welding in consideration of the root face (Root Face) as in the prior art.

도 1은 종래 피팅의 개선부와 배관의 개선부를 나타낸 단면도이다.
도 2는 본 발명에 따른 피팅 용접에 따른 개선부를 루트 페이스가 0가 되도록 나타낸 단면도이고
도 3은 도 2에 도시된 개선부를 용접하였을 때를 나타낸 단면도이다.1 is a cross-sectional view showing an improved part of a conventional fitting and an improved part of a pipe.
Figure 2 is a cross-sectional view showing the root face is zero to improve the fitting according to the present invention
FIG. 3 is a cross-sectional view when the improved part illustrated in FIG. 2 is welded.

아래에서는 본 발명에 따른 피팅의 용접방법의 양호한 실시예를 첨부한 도면을 참조로 하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings a preferred embodiment of the welding method of the fitting according to the present invention will be described in detail.

도면에서, 도 2는 본 발명에 따른 피팅 용접에 따른 개선부를 루트 페이스가 0가 되도록 나타낸 단면도이고, 도 3은 도 2에 도시된 개선부를 용접하였을 때를 나타낸 단면도이다.In the drawings, FIG. 2 is a cross-sectional view showing the root portion of the improvement part according to the fitting welding according to the present invention to be zero, and FIG. 3 is a cross-sectional view when the improvement part shown in FIG. 2 is welded.

도 2 및 도 3에 도시된 바와 같이, 피팅(110)을 배관(120)에 용접하고자 할 경우, 피팅(110)의 용접부 및 배관(120)의 용접부에는 경사면을 갖는 개선부(111, 121)가 형성된다.As shown in FIGS. 2 and 3, when the fitting 110 is to be welded to the pipe 120, the improved parts 111 and 121 having inclined surfaces are formed at the welded part of the fitting 110 and the welded part of the pipe 120. Is formed.

이와 같이 개선부(111, 121)는 피팅(110) 및 배관(120)을 동일하게 외주면에서 내주면으로 경사진 경사면(113, 123)이 형성됨으로써, 피팅(110)의 개선부(111)와 배관(120)의 개선부(121)를 접하였을 때에 V형 개선부가 형성된다.In this way, the improved parts 111 and 121 are formed with the inclined surfaces 113 and 123 inclined from the outer circumferential surface to the inner circumferential surface of the fitting 110 and the pipe 120 in the same manner, whereby the improvement part 111 and the piping of the fitting 110 are connected. The V-shaped improvement part is formed when the improvement part 121 of 120 is contacted.

개선부(111, 121)가 형성된 피팅(110)과 배관(120)을 상호 접하도록 위치한다. 여기에서 종래에는 루트 페이스(15, 25)를 형성하고 루트 갭(19)이 형성되도록 배치하였으나, 본 발명에서는 루트 페이스의 구성이 없으며 또한 루트 갭이 형성되지 않도록 피팅(110)과 배관(120)을 접하도록 위치한다.The fittings 110 and the pipes 120 in which the improvement parts 111 and 121 are formed are positioned to be in contact with each other. Here, although the root faces 15 and 25 are formed in the related art, the root gaps 19 are formed to be formed. However, in the present invention, the fitting 110 and the pipe 120 do not have the root face and the root gaps are not formed. Position it to contact.

이 상태에서 개선부(111, 121)를 용접하면 용융물의 온도에 의해 두께가 얇아지는 내주면의 접한 부위가 용융되며 접한 부위가 용융됨에 따라 용융물이 내주면으로 유입되어 백비드(130)를 형성하게 된다. In this state, when the improvement parts 111 and 121 are welded, the contact portion of the inner circumferential surface that becomes thin due to the temperature of the melt is melted, and as the contact portion is melted, the melt flows into the inner circumferential surface to form the back bead 130. .

여기에서 TIG 용접을 주로하는 내부식성이 강한 스테인리스 강 재질의 피팅과 배관을 대상으로 하며, 스테인리스 강재질의 피팅과 배관을 용접함에 있어서, 개선각 즉 V형 개선부의 내각(θ)은 40°±5° 인 것이 바람직하다.
Here, it is intended for fittings and piping made of stainless steel with high corrosion resistance mainly for TIG welding. In welding fittings and piping made of stainless steel, the angle of improvement (ie, the angle of the V-shaped part) is 40 ° ± 5. It is preferred to be °.

110 : 피팅
111, 121 : 개선부
113, 123 : 경사면
120 : 배관
130 : 백비드110: fitting
111, 121: Improvement department
113, 123: slope
120: Piping
130: back bead

Claims (3)

피팅의 원주 단부와 피팅을 용접하고자 하는 부재의 원주 단부를 개선하는 단계, 개선된 피팅의 단부와 부재의 단부를 접하도록 배치하는 단계와, 접해 위치한 피팅의 개선부와 부재의 개선부를 용접하는 단계를 포함하는 것을 특징으로 하는 피팅의 용접방법.
Improving the circumferential end of the fitting and the circumferential end of the member to which the fitting is to be welded, arranging the end of the improved fitting and the end of the member, and welding the refinement of the adjacent fitting and the improvement of the member Welding method of the fitting comprising a.
제1항에 있어서,
개선하는 단계에서는 스테인리스 피팅 루트 패이스를 0으로 가공하여 외주면에서 내주면까지 V형태의 경사면으로만 형성되도록 개선하는 것을 특징으로 하는 피팅의 용접방법.
The method of claim 1,
In the step of improving, the welding method of the fitting, characterized in that the stainless steel fitting route face to be processed to 0 to be formed only in the inclined surface of the V shape from the outer peripheral surface to the inner peripheral surface.
제1항 또는 제2항에 있어서,
피팅의 단부와 부재의 단부가 접하였을 때에 개선부는 V형태로 형성되고, 개선부 안쪽을 용접하였을 때에 용융물은 상호 접해 위치한 피팅 및 부재의 내주면을 용융시켜 내주면에 백비드를 형성하는 것을 특징으로 하는 피팅의 용접방법.3. The method according to claim 1 or 2,
The improvement part is formed in V shape when the end part of the fitting and the end part of the member contact each other, and when the inner part of the improvement part is welded, the melt melts the inner circumferential surface of the fitting and the member which are in contact with each other to form a back bead on the inner circumferential surface. How to weld fittings.
KR1020120059331A 2012-06-01 2012-06-01 Welding method of stainless fitting KR20130135608A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105108281A (en) * 2015-08-29 2015-12-02 中国北车集团大连机车车辆有限公司 Welding process for oil pipe of main transformer of electric locomotive
WO2023022532A1 (en) * 2021-08-18 2023-02-23 (주)뉴아세아 Fitting pipe for automatic welding

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105108281A (en) * 2015-08-29 2015-12-02 中国北车集团大连机车车辆有限公司 Welding process for oil pipe of main transformer of electric locomotive
WO2023022532A1 (en) * 2021-08-18 2023-02-23 (주)뉴아세아 Fitting pipe for automatic welding

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