KR101206148B1 - Surface processing method of elbow shpae pipe caliber - Google Patents

Surface processing method of elbow shpae pipe caliber Download PDF

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KR101206148B1
KR101206148B1 KR1020050117681A KR20050117681A KR101206148B1 KR 101206148 B1 KR101206148 B1 KR 101206148B1 KR 1020050117681 A KR1020050117681 A KR 1020050117681A KR 20050117681 A KR20050117681 A KR 20050117681A KR 101206148 B1 KR101206148 B1 KR 101206148B1
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South Korea
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elbow
pipe
inner diameter
welding
shaped pipe
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KR1020050117681A
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Korean (ko)
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KR20070058874A (en
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최학희
김상범
정진현
이청래
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두산인프라코어 주식회사
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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
    • B23K9/04—Welding for other purposes than joining, e.g. built-up welding
    • B23K9/044—Built-up welding on three-dimensional surfaces
    • B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
    • B23K9/048—Built-up welding on three-dimensional surfaces on surfaces of revolution on cylindrical surfaces
    • 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
    • B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
    • B23K28/02—Combined welding or cutting procedures or apparatus
    • 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
    • B23K31/025—Connecting cutting edges or the like to tools; Attaching reinforcements to workpieces, e.g. wear-resisting zones to tableware
    • 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
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
    • 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
    • B23K5/00—Gas flame welding
    • B23K5/18—Gas flame welding for purposes other than joining parts, e.g. built-up 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
    • B23K9/00—Arc welding or cutting
    • B23K9/235—Preliminary treatment
    • 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

Abstract

본 발명은 엘보우 형상의 파이프의 내경 육성용접방법에 관한 것으로, 엘보우 형상의 파이프를 3 등분으로 절단하는 단계; 상기 3 등분으로 절단된 각각의 파이프의 내경 표면을 초경합금을 이용하여 육성용접하는 단계; 상기 3 등분으로 절단되고 육성용접된 파이프를 상호 이음용접하는 단계;를 포함하여 구성된다. 이에 따라, 엘보우 형상의 파이프의 내경 육성용접에 따른 작업성을 상대적으로 향상시킬 수 있다.The present invention relates to an inner diameter growth welding method of an elbow-shaped pipe, comprising: cutting an elbow-shaped pipe into three equal parts; Growing and welding the inner diameter surface of each pipe cut into three equal parts using cemented carbide; And jointly welding the pipes cut and cultivated in three equal parts. Accordingly, the workability according to the inner diameter growth welding of the elbow-shaped pipe can be relatively improved.

파이프, 육성용접층, 용접비드 Pipe, Welded Weld Layer, Weld Bead

Description

엘보우 형상의 파이프의 내경 육성용접방법 {SURFACE PROCESSING METHOD OF ELBOW SHPAE PIPE CALIBER}Welding method for raising inner diameter of elbow shaped pipe {SURFACE PROCESSING METHOD OF ELBOW SHPAE PIPE CALIBER}

도 1은 종래의 엘보우형 파이프 구조를 도시한 단면도,1 is a cross-sectional view showing a conventional elbow pipe structure,

도 2a 내지 도 2d는 본 발명에 따른 엘보우 형상의 파이프의 내경 육성용접과정을 단계적으로 도시한 단면도,Figure 2a to 2d is a cross-sectional view showing the inner diameter growth welding step of the elbow-shaped pipe according to the present invention,

도 3는 본 발명에 따른 엘보우 형상의 파이프의 내경 육성용접방법을 도시한 흐름도이다.3 is a flow chart illustrating an inner diameter growth welding method of an elbow-shaped pipe according to the present invention.

< 도면의 주요 부분에 대한 부호의 설명 >             Description of the Related Art

20 : 파이프 22 : 제1파이프            20 pipe 22 first pipe

24 : 제2파이프 26 : 제3파이프            24: second pipe 26: third pipe

30 : 육성용접층 40a,40b : 용접비드            30: growth welding layer 40a, 40b: welding bead

본 발명은 엘보우 형상의 파이프의 내경 육성용접방법에 관한 것으로서, 보다 상세하게는 엘보우 형상의 파이프의 내경 육성용접 작업을 효율적으로 개선시킬 수 있는 엘보우 형상의 파이프의 내경 육성용접방법에 관한 것이다.The present invention relates to an inner diameter growth welding method of an elbow-shaped pipe, and more particularly, to an inner diameter growth welding method of an elbow-shaped pipe that can efficiently improve the inner diameter growth welding operation of an elbow-shaped pipe.

일반적으로, 파이프(Pipe)는 주로 유체(기체?액체) 또는 분체(粉體)의 수송에 사용되며, 그 사용목적 및 용도에 따라 형상 및 재질이 다양하게 구분된다.In general, pipes are mainly used for transporting fluids (gas and liquids) or powders, and various shapes and materials are classified according to their purpose and use.

이러한 파이프는 내부에 유체 또는 분체가 이송될 수 있는 내부통로가 형성되어 있으며, 이 내부통로의 형상은 원형, 각형 또는 불규칙 형상을 지니고 있다. Such a pipe has an internal passage through which fluid or powder can be transported, and the inner passage has a circular, rectangular or irregular shape.

그리고 파이프의 내부통로를 따라 흐르는 유체의 종류에 따라 내마모성, 내부식성, 내약품성 등이 요구될 때에는, 파이프의 내경을 육성용접 또는 이종재질의 접합 등을 통해 표면처리하고 있다.In addition, when wear resistance, corrosion resistance, chemical resistance, and the like are required according to the type of fluid flowing along the inner passage of the pipe, the inner diameter of the pipe is surface treated by thick welding or bonding of dissimilar materials.

그러나 파이프의 내경 육성용접은 파이프의 내부통로가 작고 길이가 길거나, 파이프가 불규칙한 형상을 가지고 있을 때에는 그 작업이 어렵거나 거의 불가능하다는 문제점이 있다. 즉, 파이프의 내경이 작은 상태에서 길이가 길거나 굴곡진 형상을 지니고 있을 경우 용접토치가 들어가는 깊이까지만 육성용접이 가능하였고, 나머지 부분은 거의 용접을 할 수가 없었다. However, the inner diameter welding of the pipe has a problem that the operation is difficult or almost impossible when the inner passage of the pipe is small and the length is long, or the pipe has an irregular shape. In other words, when the length of the pipe is small or the shape of the pipe is long or curved, the welding welding is possible up to the depth of the welding torch, and the rest of the pipe is hardly welded.

예컨대, 콘크리트 펌프카에 사용되는 엘보우형 파이프가 그 대표적인 예인데, 콘크리트 펌프카에 설치되는 엘보우형 파이프는 모래, 자갈, 시멘트가 물과 혼합된 콘크리트를 이송하므로 내마모성 및 내부식성 등과 같은 재질적 특성이 요구된다. For example, an elbow pipe used in a concrete pump car is a representative example. An elbow pipe installed in a concrete pump car transfers concrete mixed with water such as sand, gravel, and cement, and thus requires material properties such as wear resistance and corrosion resistance. do.

이 때, 파이프 내경의 표면을 내마모성 및 내부식성 등이 우수한 재질로 육성용접 또는 이종재질을 접합해야 하나, 파이프의 형상적 특징으로 인해 표면처리작업에 어려움이 많았다.At this time, the surface of the inner diameter of the pipe should be welded or dissimilar materials made of a material having excellent abrasion resistance and corrosion resistance, but due to the shape characteristics of the pipe, the surface treatment was difficult.

상기와 같은 문제점으로 인해, 현재에는 대부분 도 1에서와 같이 엘보우형 파이프(2)의 외측 원주방향에 일정 두께의 보강부(3) 형성하여 그 마모속도를 늦추고 있다. Due to the above problems, at present, as shown in FIG. 1, the reinforcing portion 3 having a predetermined thickness is formed in the outer circumferential direction of the elbow type pipe 2 to slow down its wear rate.

그러나 상기와 같은 방법은 엘보우 형상의 파이프의 내경 표면의 마모속도를 다소 지연시키는 효과는 있으나, 엘보우 형상의 파이프의 내경 표면의 마모를 방지할 수 있는 근본적인 해결책은 못되고 있는 실정이다.However, the above method has an effect of somewhat delaying the wear rate of the inner diameter surface of the elbow-shaped pipe, but it is not a fundamental solution to prevent the wear of the inner diameter surface of the elbow-shaped pipe.

본 발명은 상기와 같은 문제점을 감안하여 창출된 것으로, 엘보우 형상의 파이프의 내경 육성용접작업을 용이하게 할 수 있는 엘보우 형상의 파이프의 내경 육성용접방법을 제공하고자 하는 데 그 목적이 있다.The present invention has been made in view of the above problems, and an object of the present invention is to provide an inner diameter growth welding method of an elbow-shaped pipe which can facilitate the inner diameter growth welding operation of an elbow-shaped pipe.

상기와 같은 목적을 달성하기 위하여 본 발명은, 엘보우 형상의 파이프의 내경 육성용접방법에 있어서, 상기 엘보우 형상의 파이프를 3 등분으로 절단하는 단계; 상기 3 등분으로 절단된 각각의 파이프의 내경 표면을 초경합금을 이용하여 육성용접하는 단계; 상기 3 등분으로 절단되고 육성용접된 파이프를 상호 이음용접하는 단계; 상기 이음용접된 엘보우 형상의 파이프의 접합부에 발생되는 용접비드를 그리인딩하는 단계를 포함하여 이루어지는 데 그 특징이 있다.In order to achieve the above object, the present invention, in the inner diameter growth welding method of the elbow-shaped pipe, cutting the elbow-shaped pipe in three equal parts; Growing and welding the inner diameter surface of each pipe cut into three equal parts using cemented carbide; Joint welding the pipe cut and cultivated into three equal parts; Grinding the weld bead generated in the joint of the jointed elbow-shaped pipe is characterized in that it comprises.

상기 파이프는 엘보우 형상을 가질 경우, 그 내경의 육성용접이 특히 용이하다.When the pipe has an elbow shape, the welding of the inner diameter thereof is particularly easy.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

도 2a 내지 도 2d 및 도 3에 도시된 바와 같이, 본 발명에 따른 파이프의 내경 육성용접방법은 크게 4단계로 분류할 수 있다.As shown in Figures 2a to 2d and 3, the inner diameter growth welding method of the pipe according to the present invention can be largely classified into four steps.

① 제1단계(S1) : 도 2a에서와 엘보우 형상의 파이프(20)를 소정 등분으로 절단하여 제1,2,3파이프(22,24,26)로 구분하는 단계.① first step (S1): the step of dividing the elbow-shaped pipe 20 and the first, second, and third pipes (22, 24, 26) in Figure 2a.

이 때, 파이프(20)는 내경의 육성용접작업을 용이하게 수행할 수 있을 정도의 크기로 절단되며, 절단위치 및 절단간격은 필요에 따라 적절히 조절 가능하다.At this time, the pipe 20 is cut to a size sufficient to easily perform the welding welding of the inner diameter, the cutting position and the cutting interval can be appropriately adjusted as necessary.

② 제2단계(S2) : 절단된 복수의 파이프(22,24,26) 각각의 내경을 육성용접하여 육성용접층(30)을 형성하는 단계.② second step (S2): forming a growth welding layer 30 by fusing and welding the inner diameter of each of the plurality of cut pipes (22, 24, 26).

이 때, 복수의 파이프(22,24,26) 각각의 내경에 마련되는 육성용접층(30)의 형성방법은 육성용접 또는 이종재질의 접합 등 공지된 다양한 방법을 사용할 수 있다.At this time, the formation method of the growth welding layer 30 provided in the inner diameter of each of the plurality of pipes 22, 24, 26 may use various known methods such as growth welding or joining of dissimilar materials.

특히, 육성용접시에는 내마모성 및 내부식성이 상대적으로 우수한 초경합금을 이용하는 것이 바람직하다.In particular, it is preferable to use a cemented carbide that is relatively excellent in wear resistance and corrosion resistance during welding.

③ 제3단계(S3) : 육성용접된 복수의 파이프(22,24,26)를 상호 이음용접하는 단계; ③ the third step (S3): joint welding the plurality of pipes (22, 24, 26) fostered welded to each other;

이 단계에서 절단된 복수의 파이프(22,24,26)가 제1단계에서와 같이 하나의 파이프(20)로 결합되며, 복수의 파이프(22,24,26) 접합부에는 이음용접에 의한 용접비드(40a,40b)가 발생된다.A plurality of pipes (22, 24, 26) cut in this step is combined into one pipe 20 as in the first step, the welding bead by the joint welding to the plurality of pipes (22, 24, 26) joint 40a and 40b are generated.

④ 제4단계(S4) : 이음용접된 파이프(20)의 접합부에 발생되는 용접비드(40a,40b)를 그라인딩하는 단계;④ fourth step (S4): grinding the weld beads (40a, 40b) generated in the joint of the welded pipe 20;

이 단계에서 파이프(20)의 외형이 제1단계에서의 파이프(20)와 동일하게 되며, 그라인딩 작업은 공지된 다양한 종류의 그라인더를 선택적으로 적용할 수 있다.In this step, the outer shape of the pipe 20 becomes the same as that of the pipe 20 in the first step, and the grinding operation may selectively apply various kinds of grinders known in the art.

이와 같이, 제1단계～제4단계의 과정을 거침으로써 파이프의 내경 육성용접 과정이 최종적으로 완료된다.In this way, the inner diameter raising welding process of the pipe is finally completed by going through the first to fourth steps.

상기에서는 엘보우형 파이프의 내경 육성용접에 대해서 설명한 것이다.In the above description, the inner diameter growth welding of the elbow pipe is described.

이상에서 설명한 바와 같이 본 발명에 따르면, 엘보우 형상의 파이프의 내경 육성용접에 따른 작업성을 상대적으로 향상시킬 수 있다. 특히, 장형 또는 불규칙한 형상을 갖는 소구경 엘보우 형상의 파이프의 내경 육성용접 작업을 상대적으로 용이하게 수행할 수 있다.As described above, according to the present invention, the workability according to the inner diameter growth welding of the elbow-shaped pipe can be relatively improved. In particular, the inner diameter growth welding operation of the pipe having a small diameter elbow shape having a long or irregular shape can be performed relatively easily.

Claims (2)

엘보우 형상의 파이프의 내경 육성용접방법에 있어서,In the inner diameter growth welding method of the elbow-shaped pipe, 상기 엘보우 형상의 파이프를 3 등분으로 절단하는 단계;Cutting the elbow-shaped pipe into three equal parts; 상기 3 등분으로 절단된 각각의 파이프의 내경 표면을 초경합금을 이용하여 육성용접하는 단계;Growing and welding the inner diameter surface of each pipe cut into three equal parts using cemented carbide; 상기 3 등분으로 절단되고 육성용접된 파이프를 상호 이음용접하는 단계;를 포함하는 것을 특징으로 하는 엘보우 형상의 파이프의 내경 육성용접방법.Weld welding method of the inner diameter of the elbow-shaped pipe, characterized in that it comprises a; joint welding the pipe cut and grown in three equal parts. 제1항에 있어서,The method of claim 1, 상기 이음용접된 엘보우 형상의 파이프의 접합부에 발생되는 용접비드를 그라인딩하는 단계를 더 포함하는 것을 특징으로 하는 엘보우 형상의 파이프의 내경 육성용접방법.Grinding the weld bead generated in the joint portion of the jointed elbow-shaped pipe, the inner diameter growth welding method of the elbow-shaped pipe, characterized in that it further comprises.
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Publication number Priority date Publication date Assignee Title
JPH0342136A (en) * 1989-07-10 1991-02-22 Nippon Chikasui Kaihatsu Kk Manufatcure of radiant tube for non-spraying water type snow extingusher
JPH0665336U (en) * 1993-02-23 1994-09-16 日本ハードメタル株式会社 Duct for conveying chips
JP2003205389A (en) * 2002-01-09 2003-07-22 Akihisa Murata Finishing method for welded zone of belt-like metallic sheet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0342136A (en) * 1989-07-10 1991-02-22 Nippon Chikasui Kaihatsu Kk Manufatcure of radiant tube for non-spraying water type snow extingusher
JPH0665336U (en) * 1993-02-23 1994-09-16 日本ハードメタル株式会社 Duct for conveying chips
JP2003205389A (en) * 2002-01-09 2003-07-22 Akihisa Murata Finishing method for welded zone of belt-like metallic sheet

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