KR101423617B1 - Ceramic backing material and butt welding method using it - Google Patents

Ceramic backing material and butt welding method using it Download PDF

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Publication number
KR101423617B1
KR101423617B1 KR20130121413A KR20130121413A KR101423617B1 KR 101423617 B1 KR101423617 B1 KR 101423617B1 KR 20130121413 A KR20130121413 A KR 20130121413A KR 20130121413 A KR20130121413 A KR 20130121413A KR 101423617 B1 KR101423617 B1 KR 101423617B1
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South Korea
Prior art keywords
welding
ceramic
backing material
welded
ceramic backing
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KR20130121413A
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Korean (ko)
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구창용
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구창용
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Priority to KR20130121413A priority Critical patent/KR101423617B1/en
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Priority to PCT/KR2014/009546 priority patent/WO2015053592A1/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
    • 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
    • B23K9/0356—Seam welding; Backing means; Inserts with backing means disposed under the seam the backing means being a tape or strip
    • 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
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
    • B23K2103/52—Ceramics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S29/00—Metal working
    • Y10S29/013—Method or apparatus with electric heating

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

The present invention relates to a ceramic backing material for minimizing a back gouging during a backside back gouging for removing a crack of one side flux cored arc welding (FCAW) root passing and a butt welding method using the same. The ceramic backing material is attached to the basal surface of a weld zone between two welding materials arranged in a shape of a stick. The ceramic backing material includes: a ceramic support instrument for supporting the bottom of the weld zone; and an aluminum tape for attaching the ceramic support instrument to the basal surface of the welding material on the bottom of the weld zone. On both sides of the ceramic support instrument, material support portions are formed, and a convex portion corresponding to a weld zone groove of the weld zone is formed while protruding on the top the ceramic support instrument. On both sides on the top surface of the convex portion, the material support is slantly formed.

Description

일면 FCAW(FLUX CORED ARC WELDING) 초층 용접부 균열 제거를 위한 이면 백가우징시 백가우징 최소화를 위한 세라믹 백킹재 및 그를 이용한 맞대기 용접방법{Ceramic backing material and butt welding method using it}Technical Field [0001] The present invention relates to a ceramic backing material and a butt welding method using the ceramic backing material and the butt welding method,

본 발명은 선박 건조 시에 용접강도 증대를 위하여 2회에 걸쳐 겹쳐지게 용접을 하는데 사용되는 일면 FCAW(FLUX CORED ARC WELDING) 초층 용접부 균열 제거를 위한 이면 백가우징시 백가우징 최소화를 위한 세라믹 백킹재 및 그를 이용한 맞대기 용접방법에 관한 것으로, 더욱 상세하게는 용접부의 하방에 부착 설치하는 세라믹 백킹재의 상면에 용접부홈의 하부를 막는 볼록부를 형성하고, 그 세라믹 백킹재를 용접부 하방에 부착한 상태로 1차용접한 뒤에, 세라믹 백킹재를 제거한 상태에서 볼록부에 의해 형성되는 오목부에 초층 균열 제거를 위하여 가우징 작업 후 2차용접을 실시함으로써, 종래에 1차용접 후에 용접부의 하측에 볼록하게 형성되는 하면돌출비드를 제거하여 가우징홈을 형성할 때, 제거깊이가 깊었던 것에 비하여 가우징작업이 최소화되게 하여 용접작업에 대한 생산성을 향상시킬 수 있도록 하기 위한 것이다.(FLUX CORED ARC WELDING), a ceramic backing material for minimizing the whitewashing during the back side of a welded joint for cracking, and a ceramic backing material More particularly, the present invention relates to a butt welding method using the same, and more particularly, to a method of manufacturing a butt welding method using the same, After the abutment, the ceramic backing material is removed and the recess formed by the convex portion is subjected to secondary welding after the gouging operation to remove the cracks of the superficial layer. As a result, When forming the gouging grooves by removing the projecting beads, the gouging operation is minimized as compared with the case where the removal depth is deeper Thereby improving the productivity of welding work.

근래에 건조되는 선박은 철판들 간의 용접을 양면에 걸쳐 겹쳐지게 용접을 하여 용접부에 대한 용접강도가 증대되게 용접작업을 시행하고 있는데, 이와 같은 양면에 걸친 용접을 하기 위한 세라믹 백킹재와 그 세라믹 백킹재를 이용한 용접방법은 도 1에 도시된 바와 같다.Recently, a ship which is to be dried is welded so that the welding between the steel plates is overlapped on both sides so as to increase the welding strength to the welding part. The ceramic backing material for welding on both sides and the ceramic backing The welding method using ash is as shown in Fig.

즉, 종래의 세라믹 백킹재(10)와 그 세라믹 백킹재를 이용한 용접방법은, 도 1에서 보는 바와 같이 2개의 철판(용접모재:1)을 맞대기 용접하기 위하여 간격을 유지하게 배치되게 되는데, 이 간격을 용접부홈(6)이라고 칭하며, 이 용접부홈(6)의 하방에 세라믹 백킹재(10)를 부착하되, 세라믹 백킹재(10)의 상면에 오목하게 형성되는 오목비드홈(12)이 용접부홈(6)에 대응되게 부착한다.That is, the conventional ceramic backing material 10 and the welding method using the ceramic backing material are arranged so as to maintain the gap for the butt welding of two steel plates (welding base material 1) as shown in FIG. The concave bead groove 12 formed in the upper surface of the ceramic backing member 10 is formed in the welded portion groove 6 in the welded portion groove 6, So as to correspond to the grooves 6.

상기 세라믹 백킹재(10)는 세라믹 소재로 형성되는 세라믹받침구(11)의 상면 가운데에 용접쇳물이 받쳐지는 오목비드홈(12)이 용접부홈(6)과 대응되게 형성되며, 이 세라믹받침구(11)의 양측면과 저면을 감싸도록 알루미늄테이프(14)를 부착하되, 이 알루미늄테이프(14)의 양측은 외측방으로 날개형태로 연장 형성되어 양측 용접모재(1)의 저면에 세라믹 백킹재(10)를 도 1의 (가)와 부착할 수 있게 된다.The ceramic backing material 10 has a concave bead groove 12 formed in the upper surface of a ceramic support 11 formed of a ceramic material so as to support welded trenches to correspond to the weld groove 6, The aluminum tape 14 is attached so as to surround both side surfaces and the bottom surface of the base material 11 and both sides of the aluminum tape 14 are extended in the form of a wing outwardly to form a ceramic backing material 10 can be attached to Fig. 1 (a).

이 상태에서 도 1의 (가),(나)와 같이 양측 용접모재(1) 사이의 용접부를 1차로 용접하게 되면, 용접봉과 용접모재(1)의 용접부가 용해되면서 형성되는 용접쇳물이 용접부홈(6)에 채워지는데, 용접부홈(6)의 하방에는 오목비드홈(12)을 형성한 세라믹받침구(11)가 부착되어 있음에 따라 용해된 용접쇳물이 세라믹받침구(11)에 받쳐지면서 용접부홈(6)을 채워지게 되며, 그 용접부에 대한 용접작업이 정지되면, 용접쇳물이 응고되면서 형성되는 용착금속(2)에 의해 양측 용접모재(1)가 용접으로 결합되게 된다.In this state, when the welding portions between the welding base materials 1 on both sides are first welded as shown in Figs. 1 (a) and 1 (b), the welding dregs formed by melting the welding rod and the welding portion of the welding base material 1, Since the ceramic support 11 having the concave bead groove 12 is attached to the bottom of the weld groove 6 so that the dissolved weld metal is supported on the ceramic support 11, The welding grooves 6 are filled. When the welding operation for the welding parts is stopped, the welding base material 1 is welded by the welding metal 2 formed by solidification of the welding dregs.

그 다음에 도 1의 (나),(다)에서 보는 바와 같이 세라믹 백킹재(10)를 용접부 하방에서 제거하게 되면, 용착금속(2)의 하면은 세라믹받침구(11)의 오목비드홈(12)에 대응되게 하면돌출비드(2a)가 하측으로 돌출 형성되어 있게 된다.Then, when the ceramic backing material 10 is removed from below the welded portion as shown in FIGS. 1B and 1C, the lower surface of the weld metal 2 comes into contact with the concave bead groove of the ceramic support 11 12, the projecting beads 2a protrude downward.

이 상태에서 작업여건에 따라 하면돌출비드(2a)와 작업자가 용이하게 대면하도록 2개의 용접모재(1)를 용접한 용접체를 뒤집거나, 세우거나, 또는 작업자가 하면돌출비드(2a) 측으로 이동하는 등의 작업을 거친다.In this state, the welded body to which the two welding base materials 1 are welded is turned upside down, raised, or moved to the side of the bottom protruding bead 2a so that the bottom protruded bead 2a can easily face the workpiece under the working conditions And so on.

그 뒤에는 도 1의 (다),(라)에서 보는 바와 같이 하면돌출비드(2a)에 대하여 가우징(gauging) 작업을 실시하여 하면돌출비드(2a)를 제거하게 되면, 가우징 작업을 실시하는 과정에서 하면돌출비드(2a)가 제거된 자리에 가우징홈(3)이 형성되게 된다.Thereafter, a gauging operation is performed on the bottom protruding bead 2a as shown in FIGS. 1 (C) and 1 (D), and when the protruding bead 2a is removed, a gouging operation is performed The gouging grooves 3 are formed at the positions where the protruding beads 2a are removed.

위와 같이 형성되는 가우징홈(3)에 도 1의 (마)와 같이 2차용접을 실시함에 따라 양측 용접모재(1)의 사이에는 1차용접에 의해 결합 형성되는 용착금속(2)과, 2차용접에 의해 결합 형성되는 2차용착금속(4)이 이중으로 겹쳐지게 형성되어 용접부에 대한 결함을 방지하여 용접 품질을 향상시키게 되는 것이다.The welded metal 2, which is formed by primary welding between the both side welded base materials 1 by performing secondary welding as shown in (E) of FIG. 1 in the gouging groove 3 formed as described above, The secondary weld metal 4 coupled by car welding is formed so as to overlap with each other to prevent defects in the welds, thereby improving the welding quality.

그러나, 이는 용착금속(2)의 하방에 하향 돌출되게 형성되는 하면돌출비드(2a)를 제거하기 위한 가우징작업을 필히 실시해야 하므로, 하측으로 볼록하게 돌출되었던 하면돌출비드(2a)는 상측으로 오목하게 가우징홈(3)을 형성하게 되므로 도 6의 (가)와 같이 가우징작업에 의한 가우징제거부(16a)의 제거량이 많아져서 작업시간과, 인력, 전력, 비용이 추가로 소요됨에 따라 생산성이 저하되는 문제뿐만 아니라, 가우징 작업과정에서 발생되는 금속 분진과, 소음에 의해 작업자의 건강을 해치는 것은 물론이고, 환경을 오염시키는 등의 심각한 문제를 지니고 있었다.However, since the gouging operation for removing the bottom protruding bead 2a, which is formed so as to protrude downward below the weld metal 2, must be performed, the bottom protruding bead 2a, As shown in FIG. 6 (a), the removal amount of the gouging retarder 16a by the gouging operation is increased and the work time, manpower, electric power and cost are further required because the gouging grooves 3 are formed concavely Not only the productivity is deteriorated but also the serious problem such as polluting the environment as well as harming the health of the operator due to the metal dust and noise generated in the gouging process.

실용신안등록출원 제20-1989-13930호(고안의 명칭 : 용접지지구)Utility model registration application No. 20-1989-13930 (name of design: welded area)

본 발명은 상기의 문제점을 해결하기 위한 것으로서, 용접부의 하방에 부착 설치하는 세라믹 백킹재의 상면에 용접부홈에 대응되는 볼록부를 형성하고, 그 세라믹 백킹재를 용접부 하방에 부착한 상태로 1차용접한 뒤에 세라믹 백킹재를 제거하게 되면, 용착금속의 저면에 볼록부에 대응하는 오목부가 자동으로 형성됨에 따라, 그 오목부에 가우징작업을 조금만 해도 가우징홈이 형성되어 종래에 실시하던 가우징 작업보다 본 발명에서는 가우징작업이 최소화되게 되며, 그것으로 인하여 과도한 이면 비드 형성에 따른 불필요한 용착 금속을 작게 형성시킴에 따라 생산성을 향상시키는 것을 기술적 과제로 한다.SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a ceramic backing member which is provided under the welded portion and has a convex portion corresponding to the groove of the welded portion formed on the upper surface thereof, When the ceramic backing material is removed, a concave portion corresponding to the convex portion is automatically formed on the bottom surface of the deposited metal, so that a gouging groove is formed in the concave portion even if the gouging operation is performed only slightly. According to the invention, the gouging operation is minimized, and as a result, the unnecessary deposited metal due to excessive backside bead formation is made small, thereby improving the productivity.

상기의 목적을 달성하기 위한 본 발명은, 본 발명은 맞대기 형태로 배치되는 2개의 용접모재 사이의 용접부 이면에 부착 설치되는 것으로, 용접부 하방을 받쳐주는 세라믹받침구와, 세라믹받침구를 용접부 하방의 용접모재 저면에 부착하는 알루미늄테이프로 구성되는 세라믹 백킹재에 있어서, 상기 세라믹받침구의 양측에는 모재지지부가 형성되며, 상면에는 용접부의 용접부홈에 대응되는 볼록부가 돌출되게 형성되고, 상기 볼록부의 양측 상면에 형성되는 모재지지부가 경사지게 형성되는 것을 특징으로 한다.According to an aspect of the present invention, there is provided a welding apparatus comprising: a ceramic support for supporting a lower portion of a weld; a ceramic support for supporting a lower portion of the weld, The ceramic backing material is made of aluminum tape adhered to the bottom surface of the base material. The base material supporting portion is formed on both sides of the ceramic base, the convex portion corresponding to the welding portion groove of the welding portion is formed on the upper surface, And the base material supporting portion to be formed is formed to be inclined.

또한, 세라믹 백킹재를 이용한 맞대기 용접방법은, 맞대기 용접부의 하방을 받쳐주는 세라믹받침구와, 세라믹받침구를 용접부 하방의 용접모재 저면에 부착하는 알루미늄테이프로 구성되는 세라믹 백킹재의 세라믹받침구 상면 가운데에 세라믹받침구의 전후 전길이에 걸쳐 볼록부가 형성되는 세라믹 백킹재를 준비하는 1단계와, 볼록부가 2개의 용접모재 사이의 용접부홈으로 삽입되게 세라믹 백킹재를 용접부 저면에 부착하는 2단계와, 양측 용접모재 사이의 용접부에 1차용접을 하는 3단계와, 상기 3단계에서 용접한 용착금속이 자연 냉각된 뒤에 세라믹 백킹재를 용접부 저면에서 분리 제거하는 4단계와, 상기 4단계에서 세라믹 백킹재를 제거하여 형성되는 오목부에 가우징작업을 실시하는 5단계와, 상기 가우징 작업된 오목부에 2차용접을 실시하는 6단계가 포함되는 것을 특징으로 한다.The butt welding method using a ceramic backing material includes a ceramic support for supporting the bottom of the butt weld and a ceramic backing for the ceramic backing composed of an aluminum tape for attaching the ceramic support to the bottom of the welding base, A step of preparing a ceramic backing material having a convex portion formed over the entire length of the ceramic support sphere; a step of attaching the ceramic backing material to the bottom of the welded portion so that the convex portion is inserted into the welded portion groove between the two welded preforms; A third step of firstly welding a welded portion between the base materials, a fourth step of separating and removing the ceramic backing material from the bottom surface of the welded portion after the weld metal that has been welded in the third step is naturally cooled, and the ceramic backing material is removed A step of performing a gouging operation on the concave portion formed by the gouging process; 6 steps are included.

이상에서 살펴본 바와 같은 본 발명은, 세라믹 백킹재 상면에 용접부홈 만큼의 폭을 가지는 볼록부를 형성를 형성함에 따라 1차용접으로 형성되는 용착금속의 저면에 볼록부에 대응하는 오목부가 자동으로 형성됨에 따라 종래에 많은 용착금속을 가우징으로 제거해야 했던 가우징작업을 최소화하게 되어 용접작업에 대한 생산성이 향상되는 효과와, 가우징작업을 최소화함에 따라 작업자의 건강을 해치게 하던 문제와 환경을 오염시키는 등의 문제를 유발시키지 않게 되는 효과가 있는 것이다.According to the present invention as described above, since the convex portion having the width equivalent to the weld groove is formed on the upper surface of the ceramic backing member, the concave portion corresponding to the convex portion is automatically formed on the bottom surface of the weld metal formed by the first welding It is possible to minimize the gouging work which had conventionally been required to remove the gouging metal by gouging and to improve the productivity of the welding work and to minimize the gouging work and thereby to pollute the problem of the worker's health and the environment It is possible to prevent the problem of the problem.

또한, 본 발명에서는 오목부에 가우징작업을 하게 됨에 따라 종래의 하측으로 볼록한 하면돌출비드를 제거할 때보다 가우징작업 깊이가 낮아지게 되어 가우징 작업량이 감축되어 가우징 작업이 용이해 이를 위한 작업시간,인력,전력 비용절감 되는 효과가 있는 것이다.In addition, according to the present invention, as the gouging operation is performed on the concave portion, the depth of the gouging operation becomes lower than that of the conventional method of removing the projecting bead on the lower side, so that the gouging operation can be reduced. It has the effect of reducing work time, manpower and power cost.

도 1의 (가) 내지 (마)는 종래의 세라믹 백킹재와, 그 세라믹 백킹재를 이용한 용접과정을 나타내는 설명도.
도 2의 (가) 내지 (라)는 본 발명의 세라믹 백킹재와, 그 세라믹 백킹재를 이용한 용접과정을 나타내는 설명도.
도 3의 (가)(나)는 본 발명에 포함되는 세라믹받침구의 상면이 경사지게 형성된 것을 나타내는 단면도.
도 4의 (가) 내지 (라)는 본 발명에 포함되는 세라믹받침구에 형성되는 볼록부(15)의 각종 다른 예를 나타내는 단면도.
도 5는 본 발명의 작업방법을 나타내는 공정도.
도 6의 (가)(나)는 종래방법에서의 가우징제거부와 본 발명에서의 가우징제거부의 제거량을 비교하는 비교도면.1 (a) to 1 (e) are explanatory views showing a conventional ceramic backing member and a welding process using the ceramic backing member.
2 (a) to 2 (d) are explanatory diagrams showing a ceramic backing material of the present invention and a welding process using the ceramic backing material.
3 (a) and 3 (b) are cross-sectional views showing that the upper surface of the ceramic base included in the present invention is formed to be inclined.
4 (A) to 4 (D) are cross-sectional views showing various other examples of the convex portion 15 formed in the ceramic support included in the present invention.
5 is a process chart showing a working method of the present invention.
6 (a) and 6 (b) are comparative diagrams comparing the removal amounts of the gouging agent rejection in the conventional method and the gouging agent rejection in the present invention.

이하, 본 발명에 따른 맞대기용접용 세라믹 백킹재 및 그를 이용한 맞대기 용접방법에 대하여 첨부된 도면 도 2 내지 도 6을 참고하여 설명하면 다음과 같다.Hereinafter, a butt welding method using a butt-joint ceramic backing member and a butt welding method using the same will be described with reference to FIGS. 2 to 6 attached hereto.

먼저, 본 발명에 따른 세라믹 백킹재(10)는 도 2 내지 도 4에서 보는 바와 같이 맞대기 형태로 배치되는 2개의 용접모재(1) 사이의 용접부 저면에 부착 설치되는 것으로, 용접부 하방을 받쳐주는 세라믹받침구(11)와, 세라믹받침구(11)를 용접부 하방의 용접모재(1) 저면에 부착하는 알루미늄테이프(14)로 구성된다.2 to 4, the ceramic backing material 10 according to the present invention is attached to the bottom surface of a weld between two welding base materials 1 arranged in a butt shape, A support 11 and an aluminum tape 14 for attaching the ceramic support 11 to the bottom of the weld base 1 under the weld.

상기 용접부의 용접부홈(6)에 대응되는 세라믹받침구(11)의 상면에 볼록부(15)가 돌출되게 형성되는 구성이 포함된다. And a convex portion 15 is formed on the upper surface of the ceramic support 11 corresponding to the welded portion groove 6 of the welded portion.

이때, 상기 볼록부(15)의 형상은 도 4의 (가) 내지 (라)에서 보는 바와 같이 사다리꼴형, 삼각형, 사각형, 라운딩형 등과 같은 다양 형태로의 형성이 가능함을 밝혀둔다.At this time, it is noted that the shape of the convex portion 15 can be formed into various shapes such as a trapezoidal shape, a triangular shape, a rectangular shape, a rounding shape, and the like as shown in FIGS. 4A to 4D.

그리고, 도 3의 (가)(나)에서 보는 바와 같이 세라믹받침구(11)의 볼록부(15) 양측에 형성되는 모재지지부(13)를 상측으로 경사지게 형성하거나, 또는 하측으로 경사지게 형성할 수 있는데, 이는 맞대기용접을 하는 양측 용접모재(1)의 상면높이를 맞추기 위한 것으로, 맞대기 용접을 하고자 하는 용접모재(1)의 형상이 평평한 것뿐만 아니라, 모재지지부(13)에 지지되는 용접모재(1)의 형상이 경사진 것, 오목하거나 볼록한 것 등과 같이 다양한 형상의 용접모재(1)를 받칠 수 있게 하는 것이다.As shown in FIG. 3 (A) and FIG. 3 (B), the base material supporting portions 13 formed on both sides of the convex portion 15 of the ceramic base 11 may be inclined upward or inclined downward This is to match the height of the upper surface of the welding base material 1 on both sides for butt welding. The welding base material 1 to be butt welded is not only flat, 1 can be supported on various types of welding base materials 1 such as inclined, concave or convex shapes.

다음은 세라믹 백킹재를 이용한 맞대기 용접방법에 대한 설명으로서, 이는 도 2 및 도 5를 참고하여 설명하기로 한다.The following is a description of a butt welding method using a ceramic backing material, which will be described with reference to Figs. 2 and 5.

세라믹 백킹재를 이용한 맞대기 용접방법은, 첫 번째로 맞대기 용접부의 하방을 받쳐주는 세라믹받침구(11)와, 세라믹받침구(11)를 용접부 하방의 용접모재(1) 저면에 부착하는 알루미늄테이프(14)로 구성되는 세라믹 백킹재(10)의 세라믹받침구(11) 상면 가운데에 세라믹받침구(11)의 전후 전길이(전후 폭)에 걸쳐 볼록부(15)가 형성되는 세라믹 백킹재(10)를 준비하는 1단계(101)를 수행한다.The butt welding method using the ceramic backing material includes a ceramic support 11 for supporting the bottom of the butt weld portion first and an aluminum tape 11 for attaching the ceramic support 11 to the bottom of the welding base member 1 Ceramic backing material 10 in which a convex portion 15 is formed in the center of the top surface of the ceramic base 11 of the ceramic backing material 10 constituted by the ceramic backing 11, (Step 101).

이때, 볼록부(15)의 형상은 도 4의 (가) 내지 (라)에서 보는 바와 같이 사다리꼴형, 삼각형, 사각형, 라운딩형 등과 같은 다양 형태로의 형성할 수 있는 것이다.At this time, the shape of the convex portion 15 can be formed in various shapes such as a trapezoidal shape, a triangular shape, a rectangular shape, a rounding shape, and the like as shown in FIGS.

상기와 같이 상면에 볼록부(15)를 형성한 세라믹 백킹재(10)를 준비한 뒤에는, 도 2의 (나)에서 보는 바와 같이 볼록부(15)가 2개의 용접모재(1) 사이의 용접부홈(6)으로 삽입되게 세라믹 백킹재(10)를 용접부 저면에 부착하는 2단계(102)를 수행하는데, 세라믹 백킹재(10)를 용접부 저면에 부착할 때, 알루미늄테이프(14)의 점착면을 용접모재(1)의 저면에 부착하는 것은 당연한 것이다.2 (b), after the ceramic backing material 10 having the convex portions 15 formed on the upper surface thereof as described above, the convex portions 15 are welded to the welded portion between the two welding base materials 1 The ceramic backing material 10 is adhered to the bottom surface of the welded portion so that the ceramic backing material 10 is adhered to the bottom surface of the welded portion 6. In this case, It is a matter of course to attach to the bottom surface of the welding base material 1. [

위와 같이 용접부 저면에 세라믹 백킹재(10)을 부착한 뒤에는 도 2의 (가)(나)에서 보는 바와 같이 상측이 개구된 용접부홈(6)를 통하여 양측 용접모재(1) 사이의 용접부에 1차용접을 하는 3단계(103)를 수행한다.After the ceramic backing material 10 is attached to the bottom of the welded portion as described above, the welded portion between the welded portions 1 is welded to the welded portion 1 through the welded portion groove 6 with the opened upper side as shown in FIG. 2 (A) (103) of car welding is performed.

이렇게 1차용접을 실시하여 발생하는 용접쇳물이 용접부홈(6) 하측의 볼록부(15)에 받쳐지면서 용접부홈(6)에 채워지게 되며, 그 부분에 대한 1차용접작업이 멈춰지면, 용접쇳물이 자연 응고되면서 고착되어 양측 용접모재(1)를 견고하게 결합하는 용착금속(2)이 형성되게 된다.When the primary welding operation is stopped with respect to the welded trench, the welding trench generated by the primary welding is filled in the welded portion groove 6 while being supported by the convex portion 15 on the lower side of the welded portion groove 6, The molten metal is naturally fixed and solidified, so that the weld metal 2 is firmly bonded to the both side welding base materials 1.

위와 같이 3단계(103)를 거친 뒤에는 4단계(104)를 수행하게 되는데, 이 4단계(104)는 상기 3단계(103)에서 용접한 용착금속(2)이 자연 냉각된 뒤에 세라믹 백킹재(10)를 용접부 저면에서 분리 제거하는 단계이다.After the third step 103, the fourth step 104 is performed. In the fourth step 104, after the weld metal 2 welded in the third step 103 is naturally cooled, the ceramic backing material 10 from the bottom of the welded portion.

이렇게 4단계(104)에서 세라믹 백킹재(10)를 분리 제거하게 되면, 세라믹 백킹재(10)의 세라믹받침구(11) 상면 가운데에 볼록부(15)가 상향 돌출되게 볼록하게 형성되어 있음에 따라 볼록부(15)에 대응되는 용착금속(2)의 저면에는 오목부(5)가 형성되게 된다.When the ceramic backing material 10 is separated and removed in the fourth step 104, the convex portion 15 is formed to protrude upward in the center of the upper surface of the ceramic support 11 of the ceramic backing material 10 The concave portion 5 is formed on the bottom surface of the weld metal 2 corresponding to the convex portion 15.

이와 같이 볼록부(15)를 형성한 세라믹 백킹재(10)를 용접부 저면에 부착 한 상태에서 1차용접을 실시한 뒤에 사용을 마친 세라믹 백킹재(10)를 제거하는 간편한 작업에 의해 오목부(5)가 자연적으로 형성된 뒤에는 그 오목부(5)를 가우징작업을 하는 5단계(105)를 수행한다.The ceramic backing material 10 having the convex portion 15 formed thereon is attached to the bottom surface of the welded portion and subjected to the first welding and then the ceramic backing material 10 is removed. ) Is naturally formed, a fifth step (105) of performing the gouging operation on the concave portion (5) is performed.

위와 같은 5단계(105)에서 실행하는 가우징작업은 세라믹 백킹재(10)의 볼록부(15)에 의해 매끈하게 형성되는 오목부(5)를 거칠게 홈을 형성하게 하여 추후에 실행하는 2차용접에 의한 2차용착금속(4)과 1차용접에 의해 고착 형성된 용착금속과 견고하게 결합되며, 초층에 발생하는 고온 균열(hot crack)을 제거하기 위하여 실시한다.The gouging operation performed in the above-described fifth step 105 may be performed by forming a rough groove in the concave portion 5 smoothly formed by the convex portion 15 of the ceramic backing material 10, It is firmly bonded to the weld metal formed by welding with the secondary weld metal (4) welded by primary welding and is carried out in order to remove the hot crack generated in the superlayer.

이때, 5단계(105)에서 실시하는 가우징작업은 도 2의 (가)(나)와 도 6의 (나)에서 보는 바와 같이 상면이 볼록하게 돌출된 볼록부(15)에 의해 용착금속(2)의 저면에 상측으로 오목한 오목부(5)가 형성된 상태에서 그 오목부(5)에 조금 더 깊어지도록 가우징작업을 실시하게 되므로, 도 6의 (가)에 도시된 종래의 가우징제거부(16a) 보다 본 발명에서는 도 6의 (나)에서 보는 바와 같이 가우징제거부(16b)가 작아져서 그 만큼 제거량이 대폭 감축되게 되는 것이다. At this time, the gouging operation performed in step 5 (105) is performed by the convex portion 15 whose upper surface is protruded convexly as shown in (A) and (B) of FIG. 2 The gouging operation is performed such that the concave portion 5 is slightly deeper in the state where the concave portion 5 concaved upward is formed on the bottom surface of the concave portion 2 of the concave portion 2, As shown in FIG. 6 (b), the gouging agent rejection 16b is smaller than that in the embodiment 16a, so that the amount of the gouging agent 16b is significantly reduced.

위와 같은 5단계(105)에서 가우징작업을 실행하고 난 뒤에는 가우징작업에 의해 오목부(5)를 가우징작업하는 5단계(105)보다 더 깊어지고 표면이 거칠게 형성된 오목부에 2차용접을 실시하는 6단계(106)를 실시한다.After the gouging operation is performed in the fifth step 105 as described above, secondary welding is performed on the concave portion which is deeper than the fifth step 105 for gouging the concave portion 5 by the gouging operation, (Step 106).

위와 같은 6단계(106)의 2차용접을 실시함에 따라 2개의 용접모재(1) 사이의 용접부에는 1차용접에 의해 고착 형성된 용착금속(2)과, 2차용접에 의해 고착 형성되는 2차용착금속(4)에 의해 용접부의 강도가 대폭 증대되게 되어 선박 구조물을 견고하게 제작할 수 있게 되는 것이다.By performing the secondary welding of the above-mentioned six steps 106, the weld metal between the two welding base materials 1 is welded to the weld metal 2 fixedly formed by the primary welding, The strength of the welded portion is greatly increased by the weld metal 4, and the ship structure can be firmly manufactured.

1 : 용접모재 2 : 용착금속 3 : 가우징홈
4 : 2차용착금속 5 : 오목부 6 : 용접부홈
10 : 세라믹 백킹재 11 : 세라믹받침구 12 : 오목비드홈
13 : 모재지지부 14 : 알루미늄테이프 15 : 볼록부
101 : 1단계 102 : 2단계 103 : 3단계
104 : 4단계 105 : 5단계 106 : 6단계
16a, 16b : 가우징제거부1: welding base material 2: weld metal 3: gouging groove
4: secondary weld metal 5: recess 6: weld groove
10: ceramic backing material 11: ceramic base 12: concave bead groove
13: base material supporting portion 14: aluminum tape 15: convex portion
101: Step 1 102: Step 2 103: Step 3
104: fourth step 105: fifth step 106: sixth step
16a, 16b: Rejecting goggles

Claims (3)

맞대기 형태로 배치되는 2개의 용접모재 사이의 용접부 저면에 부착 설치되는 것으로, 용접부 하방을 받쳐주는 세라믹받침구와, 세라믹받침구를 용접부 하방의 용접모재 저면에 부착하는 알루미늄테이프로 구성되는 세라믹 백킹재에 있어서,
상기 세라믹받침구의 양측에는 모재지지부가 형성되며, 상면에는 용접부의 용접부홈에 대응되는 볼록부가 돌출되게 형성되고,
상기 볼록부의 양측 상면에 형성되는 모재지지부가 경사지게 형성되는 것을 특징으로 하는 일면 FCAW 초층 용접부 균열 제거를 위한 이면 백가우징시 백가우징 최소화를 위한 세라믹 백킹재.A ceramic backing member that is attached to the bottom of the weld between the two welding base materials disposed in a butt shape and includes a ceramic base supporting the lower portion of the welding portion and a ceramic backing member composed of an aluminum tape adhered to the bottom of the welding base portion below the welding portion As a result,
A base material supporting portion is formed on both sides of the ceramic base, a convex portion corresponding to a groove of the welding portion of the welding portion is formed on the upper surface,
And a base material support portion formed on both upper surfaces of the convex portion is formed to be inclined. A ceramic backing material for minimizing the whitewashing during back side whitening for crack removal of one-sided FCAW super-layer welded portion. 삭제delete 맞대기 용접부의 하방을 받쳐주는 세라믹받침구와, 세라믹받침구를 용접부 하방의 용접모재 저면에 부착하는 알루미늄테이프로 구성되는 세라믹 백킹재의 세라믹받침구 상면 가운데에 세라믹받침구의 전후 전길이에 걸쳐 볼록부가 형성되는 세라믹 백킹재를 준비하는 1단계와,
볼록부가 2개의 용접모재 사이의 용접부홈으로 삽입되게 세라믹 백킹재를 용접부 저면에 부착하는 2단계와,
양측 용접모재 사이의 용접부에 1차용접을 하는 3단계와,
상기 3단계에서 용접한 용착금속이 자연 냉각된 뒤에 세라믹 백킹재를 용접부 저면에서 분리 제거하는 4단계와,
상기 4단계에서 세라믹 백킹재를 제거하여 형성되는 오목부에 가우징작업을 실시하는 5단계와,
상기 가우징작업된 오목부에 2차용접을 실시하는 6단계가 포함되는 것을 특징으로 하는 일면 FCAW 초층 용접부 균열 제거 이면 백가우징 최소화를 위한 세라믹 백킹재를 이용한 맞대기 용접방법.A convex portion is formed over the entire length of the ceramic base in the center of the upper surface of the ceramic base of the ceramic backing member composed of the aluminum base tape and the aluminum base tape and the ceramic base plate supporting the lower portion of the butt welding portion, A step of preparing a ceramic backing material,
Two steps of attaching the ceramic backing material to the bottom surface of the welded portion so that the convex portion is inserted into the welded portion groove between the two welded preformed portions,
A third step of performing a first welding to a welded portion between the two welding base materials,
A fourth step of separating and removing the ceramic backing material from the bottom surface of the welded part after the welded metal welded in step 3 is naturally cooled,
A fifth step of performing a gouging operation on the recess formed by removing the ceramic backing material in the step 4,
And a sixth step of performing secondary welding on the gouging concaved portion. The method of butt welding using a ceramic backing material for minimizing back warping.
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