JP5575313B1 - Backing material for welding - Google Patents
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- JP5575313B1 JP5575313B1 JP2013170113A JP2013170113A JP5575313B1 JP 5575313 B1 JP5575313 B1 JP 5575313B1 JP 2013170113 A JP2013170113 A JP 2013170113A JP 2013170113 A JP2013170113 A JP 2013170113A JP 5575313 B1 JP5575313 B1 JP 5575313B1
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Abstract
【課題】溶接抜けを防止でき、溶接部に異物が混入生ぜず、また固化した溶融金属の表面が滑らかで綺麗にすることができる溶接用裏当て材を提供する。
【解決手段】並列して並べられた複数本の棒状の無機質材料製裏当て材部品１２を金属製連結シート１４で連結してなる溶接用裏当て材１０であって、裏当て材部品の各々が、連結シート接着面、被溶接物接触面、および第１および第２側壁面を備え、第１側壁面２０は、断面が凸型をしており、第２側壁面２２は、断面が凹型をしており、溶接用裏当て材が平坦状態にあるときには、前記凹弧状部に隣接する裏当て材部品の凸弧状部が比較的浅く嵌合しており、前記連結シート側を外にして曲げられたときには、前記隣接する裏当て材部品の凸弧状部が前記凹弧状部により深く嵌合するようになっていることを特徴とする。
【選択図】図１The present invention provides a welding backing material which can prevent welding from being lost, foreign matter does not enter the welded portion, and the surface of the solidified molten metal can be made smooth and clean.
A welding backing material 10 in which a plurality of rod-shaped inorganic material backing material parts 12 arranged in parallel are connected by a metal connecting sheet 14, each of the backing material parts. Includes a connection sheet adhesion surface, a workpiece contact surface, and first and second side wall surfaces. The first side wall surface 20 has a convex cross section, and the second side wall surface 22 has a concave cross section. When the welding backing material is in a flat state, the convex arc-shaped portion of the backing material component adjacent to the concave arc-shaped portion is fitted relatively shallowly, with the connecting sheet side facing out. When bent, the convex arc-shaped portion of the adjacent backing material part is fitted deeper into the concave arc-shaped portion.
[Selection] Figure 1
Description
本発明は、溶接用裏当て材に関し、特に、異形鉄筋の溶接の際に使用される溶接用裏当て材に関するものである。 The present invention relates to a welding backing material, and more particularly to a welding backing material used when welding deformed reinforcing bars.
異形鉄筋の溶接の際に使用される溶接用裏当て材としては、特許第３３７８１３６号公報に記載されたエンクローズ溶接用裏当材が知られている。
特許第３３７８１３６号の第１の発明に係るエンクローズ溶接用裏当材は、複数本の棒状のセラミクス部材と、前記セラミクス部材を並列に整列させ、隣接するセラミクス部材同士を夫々屈曲可能に繋支する繋止材とを有し、前記繋止材はセラミクス繊維、セラミクス帯及びセラミクス網からなる群から選択された１種の可撓性部材により構成されていて、前記セラミクス部材の表面に固定されていることを特徴とするものである。
As a backing material for welding used when welding deformed reinforcing bars, a backing material for enclosing welding described in Japanese Patent No. 3378136 is known.
The backing material for enclose welding according to the first invention of Japanese Patent No. 3378136 has a plurality of rod-shaped ceramic members and the ceramic members aligned in parallel to support adjacent ceramic members so that they can be bent. And is formed of a flexible member selected from the group consisting of a ceramic fiber, a ceramic band, and a ceramic net, and is fixed to the surface of the ceramic member. It is characterized by that.
特許第３３７８１３６号の第２の発明に係るエンクローズ溶接用裏当材は、複数本の棒状のセラミクス部材と、前記セラミクス部材を並列に整列させ、隣接するセラミクス部材同士を夫々屈曲可能に繋止する繋止材とを有し、前記繋止材は金属線により構成されていることを特徴とするものである。 The backing material for enclose welding according to the second invention of Japanese Patent No. 3378136 aligns a plurality of rod-shaped ceramic members and the ceramic members in parallel so as to be able to bend adjacent ceramic members in a bendable manner. It is characterized by the above-mentioned, and the said locking material is comprised with the metal wire.
特許第３３７８１３６号の第３の発明に係るエンクローズ溶接用裏当材は、１枚の矩形板状のセラミクス部材により構成されており、前記セラミクス部材の１方の面には幅方向に延びる複数本の平行な切り欠きが前記セラミクス部材の長手方向に一定ピッチで形成されており、前記セラミクス部材に形成された前記切り欠きに対して直交する方向に繋止材が固定されており、折曲時に前記繋止材により前記セラミクス部材が繋止され、前記繋止材はセラミクス繊維、セラミクス帯及びセラミクス網からなる群から選択された１種の可撓性部材により構成されていて、前記他方の面に固定されていることを特徴とするものである。 The backing material for enclose welding according to the third invention of Japanese Patent No. 3378136 is composed of a single rectangular plate-shaped ceramic member, and a plurality of surfaces extending in the width direction on one surface of the ceramic member. Parallel notches of the book are formed at a constant pitch in the longitudinal direction of the ceramic member, and a locking material is fixed in a direction perpendicular to the notches formed in the ceramic member. Sometimes the ceramic member is locked by the locking material, and the locking material is composed of one type of flexible member selected from the group consisting of ceramic fibers, ceramic bands and ceramic network, It is fixed to the surface.
前記特許第３３７８１３６号の第１および第２の発明に係るエンクローズ溶接用裏当材においては、裏当て材の構成要素であるセラミック部材が棒状であったり、矩形板状であったりするため、当初から隣り合うセラミック部材同士の間に隙間ができ、また第３の発明に係るエンクローズ溶接用裏当材においては、鉄筋表面のカーブに合わせて折り曲げた時に、前記切欠きの部分から割れてしまい、この部分に亀裂ないしは隙間が出来、その結果、ロボット溶接をする場合、溶接抜けが生じ、ロボットが停止してしまうという問題がある。 In the backing material for enclose welding according to the first and second inventions of Patent No. 3378136, because the ceramic member that is a constituent element of the backing material is rod-shaped or rectangular plate-shaped, A gap is formed between adjacent ceramic members from the beginning, and the enclosing welding backing material according to the third invention is cracked from the notch portion when bent according to the curve of the reinforcing bar surface. As a result, there is a crack or gap in this portion. As a result, when robot welding is performed, there is a problem that welding is lost and the robot stops.
また、前記隙間または亀裂のため、固化した溶融金属の表面に凹凸が生じてしまい、表面加工等の後処理が必要な場合がある。
さらにまた、前記特許のエンクローズ溶接用裏当材においては、実際に使用するとき、繋止材が被溶接物である鉄筋側に来るので、異物が溶接部に入り込み、溶接欠陥となる恐れがある。さらに、固化した溶融金属の表面に繋止材痕が生じてしまい、この場合にも、表面加工等の後処理が必要な場合がある。
Further, due to the gaps or cracks, irregularities are generated on the surface of the solidified molten metal, and post-treatment such as surface processing may be necessary.
Furthermore, in the backing material for enclose welding of the patent, since the anchoring material comes to the reinforcing bar side to be welded when actually used, foreign matter may enter the welded portion and become a welding defect. is there. Furthermore, a sealing material trace is generated on the surface of the solidified molten metal. In this case as well, post-processing such as surface processing may be necessary.
そこで、本発明は、溶接抜けを防止でき、溶接部に異物が混入生ぜず、また固化した溶融金属の表面が滑らかで綺麗にすることができる溶接用裏当て材を提供することを目的とする。 Then, this invention aims at providing the backing material for welding which can prevent a welding omission, a foreign material does not mix in a welding part, and can make the surface of the solidified molten metal smooth and beautiful. .
前記目的は、本発明の次の（１）〜（８）の構成の溶接用裏当て材により達成される。
（１）
並列して並べられた複数本の棒状の無機質材料製裏当て材部品を金属製連結シートで連結してなる溶接用裏当て材であって、
前記裏当て材部品の各々が、その底部の前記連結シートが接着される連結シート接着面、その上部の被溶接物に接触する被溶接物接触面、および第１および第２側壁面を備え、
前記第１側壁面は、全体で見て、横に凸型をしており、前記連結シート接着面の一方の側縁から上方に所定長立ち上がる第１立ち上がり部、およびこの第１立ち上がり部の上端から前記被溶接物接触面まで延びる凸弧状部を備え、
前記第２側壁面は、全体で見て、横に凹型をしており、前記連結シート接着面の他方の側縁から上方に前記第１立ち上がり部よりは短く所定長立ち上がる第２立ち上がり部、およびこの第２立ち上がり部の上端から、前記凸弧状部の半径以上の半径で前記被溶接物接触面まで延びる凹弧状部を備えており、該溶接用裏当て材が平坦状態にあるときには、前記凹弧状部に隣接する裏当て材部品の凸弧状部が浅く嵌合しており、前記連結シート側を外にして曲げられたときには、前記隣接する裏当て材部品の凸弧状部が、前記凹弧状部に、該溶接用裏当て材が平坦状態にあるときより深く嵌合するようになっている
ことを特徴とする溶接用裏当て材。
（２）
前記凸弧状部と凹弧状部の半径が同じである請求項１の溶接用裏当て材。
（３）
被溶接物の表面の曲面に合わせて、曲げて使用される前記（１）または（２）の溶接用裏当て材。
（４）
前記裏当て材部品は、主成分としてＳｉＯ２とＡｌ２Ｏ３を含有する材料で形成されている前記（１）〜（３）のいずれかの溶接用裏当て材。
（５）
前記裏当て材部品の材料が、鋳物用珪砂、礬土頁岩、カイヤナイト類、蝋石、ドロマイト、およびマグネサイト等の耐火物原料から選ばれた少なくとも一種の材料である前記（４）の溶接用裏当て材。
（６）
前記溶接用裏当て材の材料が、溶接用エンドタブ材または裏当て材製造不具合品または使用済み棄材の粉砕物である前記（１）〜（５）のいずれかの溶接用裏当て材。
（７）
溶接用裏当て材の材料が、製鉄・非鉄精錬・焼成炉等の炉材や湯路等の廃棄用耐火物の粉砕物である前記（１）〜（５）のいずれかの溶接用可撓性裏当て材。
（８）
溶接用裏当て材の材料が、フラックス粉である前記（１）〜（３）のいずれかの溶接用裏当て材。
（９）
前記金属シートが、アルミニウム製である前記（１）〜（８）のいずれかの溶接用裏当て材。
The object is achieved by a welding backing material having the following configurations (1) to (8) of the present invention.
(1)
Backing material for welding formed by connecting a plurality of rod-shaped inorganic material backing material parts arranged in parallel with a metal connecting sheet,
Each of the backing material parts includes a connecting sheet bonding surface to which the connecting sheet at the bottom is bonded, a workpiece contact surface to be in contact with a workpiece to be welded thereon, and first and second sidewall surfaces.
The first side wall surface has a laterally convex shape as a whole, a first rising portion rising upward for a predetermined length from one side edge of the connecting sheet bonding surface, and an upper end of the first rising portion A convex arc-shaped portion extending from the workpiece contact surface to the workpiece,
The second side wall surface has a concave shape laterally when viewed as a whole, a second rising portion that rises from the other side edge of the connecting sheet bonding surface upward for a predetermined length shorter than the first rising portion, and A concave arc-shaped portion extending from the upper end of the second rising portion to the workpiece contact surface with a radius equal to or larger than the radius of the convex arc-shaped portion; and when the welding backing is in a flat state, the concave portion convex arcuate portion of the backing material component adjacent to the arcuate portion is fitted rather shallow, when bent by the connecting sheet side outside the convex arcuate portion of the backing part of the adjacent said concave A welding backing material, wherein the welding backing material is adapted to fit deeper into the arcuate portion when the welding backing material is in a flat state .
(2)
The welding backing material according to claim 1, wherein the convex arc-shaped portion and the concave arc-shaped portion have the same radius.
(3)
The welding backing material according to (1) or (2), which is used by being bent in accordance with the curved surface of the surface of the workpiece.
(4)
The backing material for welding according to any one of (1) to (3), wherein the backing material component is formed of a material containing SiO 2 and Al 2 O 3 as main components.
(5)
For the welding according to (4), the material of the backing material part is at least one material selected from refractory materials such as silica sand for casting, clay shale, kyanite, wax, dolomite, and magnesite. Backing material.
(6)
The welding backing material according to any one of (1) to (5), wherein the material of the welding backing material is a welded end tab material, a backing material production defect product, or a pulverized product of used waste material.
(7)
The welding flexible material according to any one of the above (1) to (5), wherein the material of the welding backing material is a pulverized product of a furnace refractory material such as a furnace material such as iron making, non-ferrous smelting and firing furnaces, and a hot water channel Sex backing material.
(8)
The welding backing material according to any one of (1) to (3), wherein the material of the welding backing material is flux powder.
(9)
The welding backing material according to any one of (1) to (8), wherein the metal sheet is made of aluminum.
本発明の溶接用裏当て材においては、該溶接用裏当て材を構成する複数の裏当て材部品の第１および第２側壁面が凹弧状部とこれに嵌合する凸弧状部を有するので、隣り合う裏当て材部品の間の間隙が狭く、しかもストレートではなく、更には被溶接物である鉄筋の表面に合わせるべく曲げたとき、凸弧状部が更に深く凹弧状部に嵌合するので、前記間隙の幅が更に狭くなり、または全くなくなり、したがって、平坦状態で使用しても、曲面状態で使用しても溶接抜けを極力抑止できる。 In the welding backing material of the present invention, the first and second side wall surfaces of the plurality of backing material parts constituting the welding backing material have a concave arc-shaped portion and a convex arc-shaped portion fitted to the concave arc-shaped portion. Since the gap between adjacent backing material parts is narrow and not straight, and when bent to match the surface of the rebar that is the work piece, the convex arc-shaped part fits deeper into the concave arc-shaped part. , The width of the gap is further narrowed or eliminated at all, and therefore it is possible to suppress the loss of welding as much as possible even when used in a flat state or in a curved state.
更には、裏当て材部品同士を連結する連結シートは、溶接用裏当て材を使用するとき、被溶接物の表面とは反対側になり、通常は溶融金属に触れることがないので、溶接部に異物が混入することがない。 Furthermore, the connecting sheet that connects the backing material parts is the side opposite to the surface of the work piece when using the welding backing material, and usually does not touch the molten metal. Foreign matter is not mixed in.
以下、添付図面を参照しつつ、本発明の実施の形態による溶接用裏当て材１０について説明する。
本発明の実施の形態による溶接用裏当て材１０は、並列して並べられた複数本の棒状の無機質材料製裏当て材部品１２を金属製連結シート１４で連結してなるものである。
Hereinafter, a welding backing material 10 according to an embodiment of the present invention will be described with reference to the accompanying drawings.
A welding backing material 10 according to an embodiment of the present invention is formed by connecting a plurality of rod-shaped inorganic material backing material parts 12 arranged in parallel by a metal connecting sheet 14.
前記裏当て材部品１２の各々は、その底部の前記連結シート１４が接着される連結シート接着面１６、その上部の被溶接物（図３に符号Ｍで示した）に接触する被溶接物接触面１８、および第１および第２側壁面２０および２２を備えている。 Each of the backing material parts 12 is contacted with a connection sheet bonding surface 16 to which the connection sheet 14 at the bottom is bonded, and a workpiece to be welded that is in contact with a workpiece to be welded (indicated by symbol M in FIG. 3). A surface 18 and first and second sidewall surfaces 20 and 22 are provided.
前記第１側壁面２０は、図２に良く示されているように、全体で見て、横に凸型をしており、前記連結シート接着面の一方の側縁から上方に所定長立ち上がる第１立ち上がり部２４、およびこの第１立ち上がり部の上端から前記被溶接物接触面１８まで延びる凸弧状部２６を備えている。この凸弧状部２６の直径は、前記第２側壁面は１２の高さより大きく設定されている。この凸弧状部の弧の中心をＣ１で示した。 As shown in FIG. 2, the first side wall surface 20 has a laterally convex shape as a whole, and rises a predetermined length upward from one side edge of the connecting sheet bonding surface. One rising portion 24 and a convex arc-shaped portion 26 extending from the upper end of the first rising portion to the workpiece contact surface 18 are provided. The diameter of the convex arc-shaped portion 26 is set larger than the height of 12 on the second side wall surface. The center of the arc of the convex arc-shaped portion is indicated by C1.
前記第２側壁面２２は、全体で見て、横に凹型をしており、前記連結シート接着面１６の他方の側縁から上方に前記第１立ち上がり部２４よりは短く所定長立ち上がる第２立ち上がり部２８、およびこの第２立ち上がり部の上端から、前記凸弧状部の半径以下の半径で前記被溶接物接触面１８まで延びる凹弧状部３０を備えている。この凹弧状部３０の弧の半径と凸弧状部２６の弧の半径は、互いに嵌合することが出来る限りにおいて、実質的に等しいことが望ましい。 The second side wall surface 22 has a concave shape on the side as a whole, and the second side wall surface 22 rises upward from the other side edge of the connecting sheet bonding surface 16 for a predetermined length shorter than the first rising portion 24. And a concave arc-shaped portion 30 extending from the upper end of the portion 28 and the second rising portion to the workpiece contact surface 18 with a radius equal to or smaller than the radius of the convex arc-shaped portion. It is desirable that the radius of the arc of the concave arc-shaped portion 30 and the radius of the arc of the convex arc-shaped portion 26 are substantially equal as long as they can be fitted to each other.
これら凸弧状部２６と凹弧状部３０は、該溶接用裏当て材１０が図１に示した平坦状態にあるときには、前記凹弧状部３０に隣接する裏当て材部品１２の凸弧状部２６が比較的浅く嵌合しており、図３に示したように前記連結シート１４側を外にして曲げられたときには、前記隣接する裏当て材部品１２の凸弧状部２０が前記凹弧状部２２により深く嵌合するようになっている。 When the welding backing material 10 is in the flat state shown in FIG. 1, the convex arc-shaped portion 26 and the concave arc-shaped portion 30 are formed so that the convex arc-shaped portion 26 of the backing material component 12 adjacent to the concave arc-shaped portion 30. When the fitting is relatively shallow and is bent with the connecting sheet 14 side outward as shown in FIG. 3, the convex arc-shaped portion 20 of the adjacent backing material part 12 is caused by the concave arc-shaped portion 22. It is designed to fit deeply.
本溶接用裏当て材１０は、図３に示したように被溶接物の表面の曲面に合わせて、曲げて使用される。図３の（ａ）の被溶接物の鉄筋Ｍ１は、直径が２２ｍｍの鉄筋であり、図３の（ｂ）の被溶接物の鉄筋Ｍ２は、直径が３６ｍｍの鉄筋である。図３の（ａ）と（ｂ）から、小さい半径で曲げられた方が、凸弧状部２０がより深く凹弧状部２２に嵌合（密接）していることが分かる。 As shown in FIG. 3, the main welding backing material 10 is bent and used in accordance with the curved surface of the surface of the workpiece. 3A is a reinforcing bar having a diameter of 22 mm, and the reinforcing bar M2 of the welding object in FIG. 3B is a reinforcing bar having a diameter of 36 mm. 3 (a) and 3 (b), it can be seen that the convex arc-shaped portion 20 is more deeply fitted (closely) to the concave arc-shaped portion 22 when bent with a small radius.
前記裏当て材部品１２は、主成分としてSiO2とAl2O3を含有する材料で形成されていることが好ましい。
前記裏当て材部品の材料は、鋳物用珪砂、礬土頁岩、カイヤナイト類、蝋石、ドロマイト、およびマグネサイト等の耐火物原料から選ばれた少なくとも一種の材料であることが望ましい。
The backing material part 12 is preferably formed of a material containing SiO 2 and Al 2 O 3 as main components.
The material of the backing material part is desirably at least one material selected from refractory materials such as silica sand for casting, clay shale, kyanite, wax, dolomite, and magnesite.
上記裏当て材部品の粉体の材料は、また、溶接用エンドタブ材または裏当て材製造不具合品または使用済み棄材の粉砕物であることが特に望ましい。
上記裏当て材部品の材料は、更にまた、製鉄・非鉄精錬・焼成炉等の炉材や湯路等の廃棄用耐火物の粉砕物であることが望ましい。これにより、産業廃棄物の再利用が図れ、廃棄コスト等を節約できる。
上記裏当て材部品の材料は、フラックス粉とすることもできる。
前記金属シートは、アルミニウム製であることが好ましい。
It is particularly desirable that the material of the powder of the backing material part is a welded end tab material or a backing material manufacturing defect product or a pulverized product of used waste material.
It is desirable that the material of the above-mentioned backing material part is further a ground material of a waste refractory such as a furnace material such as iron making, non-ferrous smelting and firing furnaces, and a water channel. As a result, industrial waste can be reused, and disposal costs can be saved.
The material of the backing material component may be flux powder.
The metal sheet is preferably made of aluminum.
以上説明した本発明の実施の形態による溶接用裏当て材においては、該溶接用裏当て材を構成する複数の裏当て材部品の第１および第２側壁面が凹弧状部とこれに嵌合する凸弧状部を有するので、隣り合う裏当て材部品の間の間隙が狭く、しかもストレートではなく、更には被溶接物である鉄筋の表面に合わせるべく曲げたとき、凸弧状部が更に深く凹弧状部に嵌合するので、前記間隙の幅が更に狭くなり、または全くなくなり、したがって、平坦状態で使用しても、曲面状態で使用しても溶接抜けを極力抑止できる。
更には、裏当て材部品同士を連結する連結シートは、溶接用裏当て材を使用するとき、被溶接物の表面とは反対側になり、通常は溶融金属に触れることがないので、溶接部に異物が混入することがない。
In the welding backing material according to the embodiment of the present invention described above, the first and second side wall surfaces of the plurality of backing material parts constituting the welding backing material are fitted to the concave arc-shaped portion. Since the convex arc-shaped part is narrow, the gap between the adjacent backing material parts is narrow, not straight, and when bent to match the surface of the rebar as the work piece, the convex arc-shaped part is more deeply concave. Since it fits into the arcuate portion, the width of the gap is further narrowed or eliminated at all, and therefore, it is possible to suppress weld loss as much as possible even when used in a flat state or a curved surface state.
Furthermore, the connecting sheet that connects the backing material parts is the side opposite to the surface of the work piece when using the welding backing material, and usually does not touch the molten metal. Foreign matter is not mixed in.
１０ 溶接用裏当て材
１２ 裏当て材部品
１４ 連結シート
１６ 連結シート接着面
１８ 被溶接物接触面
２０ 第１側壁面
２２ 第２側壁面
２４ 第１立ち上がり部
２６ 凸弧状部
２８ 第２立ち上がり部
３０ 凹弧状部
Ｍ１ 被溶接物
Ｍ２ 被溶接物
DESCRIPTION OF SYMBOLS 10 Backing material for welding 12 Backing material components 14 Connection sheet 16 Connection sheet adhesion surface 18 Workpiece contact surface 20 First side wall surface 22 Second side wall surface 24 First rising portion 26 Convex arc portion 28 Second rising portion 30 Concave arc-shaped part M1 Workpiece M2 Workpiece
Claims (9)
前記裏当て材部品の各々が、その底部の前記連結シートが接着される連結シート接着面、その上部の被溶接物に接触する被溶接物接触面、および第１および第２側壁面を備え、
前記第１側壁面は、全体で見て、横に凸型をしており、前記連結シート接着面の一方の側縁から上方に所定長立ち上がる第１立ち上がり部、およびこの第１立ち上がり部の上端から前記被溶接物接触面まで延びる凸弧状部を備え、
前記第２側壁面は、全体で見て、横に凹型をしており、前記連結シート接着面の他方の側縁から上方に前記第１立ち上がり部よりは短く所定長立ち上がる第２立ち上がり部、およびこの第２立ち上がり部の上端から、前記凸弧状部の半径以上の半径で前記被溶接物接触面まで延びる凹弧状部を備えており、該溶接用裏当て材が平坦状態にあるときには、前記凹弧状部に隣接する裏当て材部品の凸弧状部が浅く嵌合しており、前記連結シート側を外にして曲げられたときには、前記隣接する裏当て材部品の凸弧状部が、前記凹弧状部に、該溶接用裏当て材が平坦状態にあるときより深く嵌合するようになっている
ことを特徴とする溶接用裏当て材。 Backing material for welding formed by connecting a plurality of rod-shaped inorganic material backing material parts arranged in parallel with a metal connecting sheet,
Each of the backing material parts includes a connecting sheet bonding surface to which the connecting sheet at the bottom is bonded, a workpiece contact surface to be in contact with a workpiece to be welded thereon, and first and second sidewall surfaces.
The first side wall surface has a laterally convex shape as a whole, a first rising portion rising upward for a predetermined length from one side edge of the connecting sheet bonding surface, and an upper end of the first rising portion A convex arc-shaped portion extending from the workpiece contact surface to the workpiece,
The second side wall surface has a concave shape laterally when viewed as a whole, a second rising portion that rises from the other side edge of the connecting sheet bonding surface upward for a predetermined length shorter than the first rising portion, and A concave arc-shaped portion extending from the upper end of the second rising portion to the workpiece contact surface with a radius equal to or larger than the radius of the convex arc-shaped portion; and when the welding backing is in a flat state, the concave portion convex arcuate portion of the backing material component adjacent to the arcuate portion is fitted rather shallow, when bent by the connecting sheet side outside the convex arcuate portion of the backing part of the adjacent said concave A welding backing material, wherein the welding backing material is adapted to fit deeper into the arcuate portion when the welding backing material is in a flat state .
The welding backing material according to any one of claims 1 to 8, wherein the metal sheet is made of aluminum.
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| JP2013170113A JP5575313B1 (en) | 2013-08-20 | 2013-08-20 | Backing material for welding |
| PCT/JP2014/069465 WO2015025671A1 (en) | 2013-08-20 | 2014-07-23 | Backing material for welding |
| KR1020147032983A KR101740107B1 (en) | 2013-08-20 | 2014-07-23 | Backing material for welding |
| CN201480001368.8A CN104661790B (en) | 2013-08-20 | 2014-07-23 | Welding backing plate |
| TW103128149A TWI611860B (en) | 2013-08-20 | 2014-08-15 | Welding pad |
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| JP2013170113A JP5575313B1 (en) | 2013-08-20 | 2013-08-20 | Backing material for welding |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2016083682A (en) * | 2014-10-27 | 2016-05-19 | 株式会社スノウチ | Weld backing steel plate |
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