JP2014168808A - Insert material for weld - Google Patents

Insert material for weld Download PDF

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JP2014168808A
JP2014168808A JP2013043055A JP2013043055A JP2014168808A JP 2014168808 A JP2014168808 A JP 2014168808A JP 2013043055 A JP2013043055 A JP 2013043055A JP 2013043055 A JP2013043055 A JP 2013043055A JP 2014168808 A JP2014168808 A JP 2014168808A
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insert material
welding
plate portion
workpiece
vertical surface
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JP6077889B2 (en
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Chiaki Ito
千秋 伊藤
Masahiko Akamatsu
政彦 赤松
Shingo Yonemoto
臣吾 米本
Takayoshi Kozuki
崇功 上月
Atsuhito Aoki
篤人 青木
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Kawasaki Heavy Industries Ltd
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Kawasaki Heavy Industries Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an insert material for weld with which when vertically arranged workpieces are welded to each other, a weld flaw can be suppressed.SOLUTION: An insert material 3 for weld which is disposed between workpieces 1,2 vertically separated from each other, includes a plate part 32 which is sandwiched between the workpieces 1,2, and a backing part 32 having an upper side projection 33 and a lower side projection 34 which are vertically extended from the plate part 32. The height of projection of the upper side projection 33 from the plate part 31 is smaller than the height of projection of the lower side projection 34 from the plate part 31.

Description

本発明は、ワーク同士を溶接する際に使用される溶接用インサート材に関する。   The present invention relates to a welding insert material used when welding workpieces.

従来から、例えば配管同士を突合せ溶接する際には、配管の内側の裏ビードを容易に形成するために、リング状の溶接用インサート材が使用されている。この溶接用インサート材は、例えば開先加工が施されたワークのルート部間に配置され、当該インサート材に向かってタングステン電極からアークが生成されることによって溶融し、ワークのルート部と融合する。   Conventionally, for example, when butt welding pipes, a ring-shaped welding insert material is used to easily form a back bead inside the pipe. This welding insert material is disposed between, for example, the root portion of the workpiece that has been subjected to groove processing, and melts by generating an arc from the tungsten electrode toward the insert material, and is fused with the root portion of the workpiece. .

溶接用インサート材としては、フラットな座金状のものあるし、断面形状が略T字状のものもある(例えば、特許文献1参照)。T字型の溶接用インサート材は、ワーク同士の間に挟まれるプレート部と、双方のワークの裏面(ワークが配管の場合は内周面)に宛がわれる半円状の裏当部を有している。   As the welding insert material, there is a flat washer-like material and a cross-sectional shape is substantially T-shaped (for example, see Patent Document 1). The T-shaped welding insert material has a plate part sandwiched between the workpieces and a semicircular backing part addressed to the back surfaces of both workpieces (inner circumferential surface when the workpiece is a pipe). doing.

特開平8−19831号公報JP-A-8-19831

溶接用インサート材を用いた配管同士の突合せ溶接は、通常は配管同士を横並びにして(すなわち、溶接方向が縦向きで)行われる。しかし、建設現場などでは、配管同士を縦並びにして(すなわち、溶接方向が横向きで)突合せ溶接しなければならない場合もある。本発明の発明者らが実験を行った結果、上下に離間するワーク同士の間にT字型の溶接用インサート材を配置して溶接すると、多くの場合は完全溶け込み溶接が実現できず、溶接欠陥が生じることが分かった。   Butt welding of pipes using a welding insert material is usually performed with the pipes side by side (that is, the welding direction is vertical). However, at a construction site or the like, it may be necessary to butt-weld the pipes vertically (that is, the welding direction is horizontal). As a result of experiments conducted by the inventors of the present invention, when a T-shaped welding insert material is arranged and welded between workpieces that are separated from each other vertically, in most cases, complete penetration welding cannot be realized and welding is performed. It was found that defects occurred.

そこで、本発明は、縦並びのワーク同士を溶接するときの溶接欠陥を抑制することができる溶接用インサート材を提供することを目的とする。   Then, an object of this invention is to provide the insert material for welding which can suppress the welding defect at the time of welding the workpieces arranged in a line.

前記課題を解決するために、本発明の発明者は、鋭意研究の結果、T字型の溶接用インサート材を用いたときに溶接欠陥が生じるのは、T字型の溶接用インサート材の断面形状が(上下)対称であることに起因することを突き止めた。それ故に、T字型の溶接用インサート材を上下に離間するワーク同士の間に配置した場合には、裏当部における上側突出部に溶け残り生じることが分かった。一方、上側突出部を完全になくした場合には、アンダーカットの欠陥が新たに生じることも確認された。本発明は、このような観点からなされたものである。   In order to solve the above-mentioned problems, the inventors of the present invention, as a result of diligent research, show that when a T-shaped welding insert material is used, a weld defect is caused by the cross section of the T-shaped welding insert material. We found out that the shape was due to (vertical) symmetry. Therefore, it has been found that when the T-shaped welding insert material is disposed between the workpieces that are vertically spaced apart, it remains undissolved in the upper protruding portion of the backing portion. On the other hand, it was also confirmed that undercut defects newly occur when the upper protrusions are completely eliminated. The present invention has been made from such a viewpoint.

すなわち、本発明の溶接用インサート材は、上下に離間するワーク同士の間に配置される溶接用インサート材であって、前記ワーク間に挟まれるプレート部と、前記プレート部から上下に張り出す、上側突出部および下側突出部を有する裏当部と、を備え、前記上側突出部の前記プレート部からの突出高さは、前記下側突出部の前記プレート部からの突出高さよりも小さいことを特徴とする。   That is, the welding insert material of the present invention is a welding insert material disposed between workpieces that are vertically separated, and a plate portion sandwiched between the workpieces, and projects vertically from the plate portion. A backing portion having an upper protruding portion and a lower protruding portion, and a protruding height of the upper protruding portion from the plate portion is smaller than a protruding height of the lower protruding portion from the plate portion. It is characterized by.

上記の構成によれば、裏当部に上側突出部を残すことにより、アンダーカットを防ぐことができる。また、上側突出部の突出高さを下側突出部の突出高さよりも小さくすることにより、上側突出部の溶け残りを抑制することができる。   According to said structure, an undercut can be prevented by leaving an upper side protrusion part in a backing part. Further, by making the protruding height of the upper protruding portion smaller than the protruding height of the lower protruding portion, it is possible to suppress the unmelted residue of the upper protruding portion.

前記上側突出部の突出高さは、前記下側突出部の突出高さの0.5〜0.8倍であることが望ましい。この構成によれば、上側突出部を上方に位置するワークの位置決めに利用可能としつつ、上側突出部の溶け残りを効果的に抑制することができる。   The protrusion height of the upper protrusion is preferably 0.5 to 0.8 times the protrusion height of the lower protrusion. According to this configuration, it is possible to effectively suppress the remaining undissolved portion of the upper protruding portion while making the upper protruding portion usable for positioning of the workpiece positioned above.

前記裏当部の前記プレート部と反対側の表面は、前記プレート部を厚さ方向に二等分する平面上に、前記プレート部と反対側に最も突出する頂点を有する滑らかな凸面であってもよい。この構成によれば、裏当部における最も入熱量の大きな箇所の厚さを最大とすることができ、熱を上側突出部および下側突出部へ効率的に分配することができる。   The surface of the backing portion opposite to the plate portion is a smooth convex surface having a vertex that protrudes most on the opposite side of the plate portion on a plane that bisects the plate portion in the thickness direction. Also good. According to this configuration, the thickness of the portion having the largest heat input amount in the backing portion can be maximized, and heat can be efficiently distributed to the upper protrusion and the lower protrusion.

前記上側突出部は、前記プレート部の上面から垂直に立ち上がる上側垂直面を有し、前記下側突出部は、前記プレート部の下面から垂直に垂れ下がる下側垂直面を有し、前記凸面は、前記上側垂直面の上端から前記下側垂直面の下端まで連続していてもよい。この構成によれば、全幅に亘って均一な形状の裏ビードを形成することができる。   The upper protrusion has an upper vertical surface that rises perpendicularly from the upper surface of the plate portion, the lower protrusion has a lower vertical surface that hangs vertically from the lower surface of the plate portion, and the convex surface is You may be continuous from the upper end of the upper vertical surface to the lower end of the lower vertical surface. According to this configuration, a back bead having a uniform shape can be formed over the entire width.

例えば、前記溶接用インサート材は、リング状をなしていてもよい。   For example, the welding insert material may have a ring shape.

本発明によれば、縦並びのワーク同士を溶接するときの溶接欠陥を抑制することができる。   According to the present invention, it is possible to suppress welding defects when welding workpieces arranged in tandem.

本発明の一実施形態に係る溶接用インサート材を用いて溶接される縦並びのワークの一例を示す正面図である。It is a front view which shows an example of the workpiece | work of the vertical alignment welded using the welding insert material which concerns on one Embodiment of this invention. 図1のII−II線に沿った断面図である。It is sectional drawing along the II-II line of FIG. 図2の要部拡大図である。FIG. 3 is an enlarged view of a main part of FIG. 2. 本発明の一実施形態に係る溶接用インサート材の断面形状を示す図である。It is a figure which shows the cross-sectional shape of the insert material for welding which concerns on one Embodiment of this invention. 変形例の溶接用インサート材の断面形状を示す図である。It is a figure which shows the cross-sectional shape of the insert material for welding of a modification.

図1に、本発明の一実施形態に係る溶接用インサート材3(図2参照)を用いて溶接される縦並びのワーク1,2の一例を示す。溶接用インサート材(以下、単に「インサート材」という。)3は、図2に示すように、上下に離間するワーク1,2同士の間に配置される。   FIG. 1 shows an example of vertically aligned workpieces 1 and 2 that are welded using a welding insert 3 (see FIG. 2) according to an embodiment of the present invention. As shown in FIG. 2, a welding insert material (hereinafter simply referred to as “insert material”) 3 is disposed between workpieces 1 and 2 that are spaced apart from each other.

図1および図2に示す例では、下方に位置する第1ワーク1が水平方向に延びる大きな直径の配管であり、上方に位置する第2ワーク2が、第1ワーク1の側面に接合される、鉛直方向に延びる小さな直径の配管である。そして、インサート材3は、第2ワークの断面形状と相似なリング状をなしている。   In the example shown in FIGS. 1 and 2, the first work 1 positioned below is a pipe having a large diameter extending in the horizontal direction, and the second work 2 positioned above is joined to the side surface of the first work 1. A small-diameter pipe extending in the vertical direction. And the insert material 3 has comprised the ring shape similar to the cross-sectional shape of a 2nd workpiece | work.

第1ワーク1には、内周面1bと外周面1aをつなぐように、上向きに開口する円形の貫通穴15が形成されている。貫通穴15の直径は、第2ワーク2の内径とほぼ等しい。   The first workpiece 1 is formed with a circular through-hole 15 that opens upward so as to connect the inner peripheral surface 1b and the outer peripheral surface 1a. The diameter of the through hole 15 is substantially equal to the inner diameter of the second workpiece 2.

第1ワーク1aの外周面1aには、貫通穴15から少し離れた位置に環状の溝12が形成されている。これにより、外周面1aには、貫通穴15を縁取る薄肉の周壁11が形成されている。周壁11の上端面は、水平方向にフラットに加工されている。   An annular groove 12 is formed on the outer peripheral surface 1 a of the first workpiece 1 a at a position slightly away from the through hole 15. Thereby, the thin peripheral wall 11 which borders the through-hole 15 is formed in the outer peripheral surface 1a. The upper end surface of the peripheral wall 11 is machined flat in the horizontal direction.

一方、第2ワーク2の下端部21は、外周面2aに開先加工によって傾斜面22が形成されることにより、薄肉となっている。なお、開先形状がJ形開先などの場合は、傾斜面22は曲面となる。換言すれば、下端部21は開先のルート部である。下端部21のルートフェイス厚は、第1ワーク1の周壁11の肉厚とほぼ等しい。ただし、第2ワーク2の肉厚が薄いときは、外周面2aへの開先加工は不要である。すなわち、外周面2aは、第2ワーク2の全長に亘って内周面2bと平行であってもよい。   On the other hand, the lower end portion 21 of the second workpiece 2 is thinned by forming the inclined surface 22 on the outer peripheral surface 2a by groove processing. When the groove shape is a J-shaped groove or the like, the inclined surface 22 is a curved surface. In other words, the lower end portion 21 is a root portion of the groove. The root face thickness of the lower end 21 is substantially equal to the thickness of the peripheral wall 11 of the first workpiece 1. However, when the thickness of the second workpiece 2 is thin, groove processing on the outer peripheral surface 2a is not necessary. That is, the outer peripheral surface 2 a may be parallel to the inner peripheral surface 2 b over the entire length of the second workpiece 2.

なお、溝12と傾斜面22とで囲まれる空間は、インサート材3を用いてTIG(Tungsten Inert Gas)溶接が行われた後に、図2に二点鎖線で示すように、MIG(Metal Inert Gas)溶接またはMAG(Metal Active Gas)溶接などにより溶接材で埋められる。   Note that the space surrounded by the groove 12 and the inclined surface 22 is MIG (Metal Inert Gas) as shown by a two-dot chain line in FIG. 2 after TIG (Tungsten Inert Gas) welding is performed using the insert material 3. ) Filled with welding material by welding or MAG (Metal Active Gas) welding.

インサート材3は、図3に示すように、略T字状の断面形状を有している。具体的に、インサート材3は、第1ワーク1の周壁11と第2ワーク2の下端部21との間に挟まれるプレート部31と、プレート部31から上下に張り出す裏当部32とを含む。裏当部32は、第1ワーク1の貫通穴15の内面(周壁11の内周面)に宛がわれる下側突出部34と、第2ワーク2の内周面2bに宛がわれる上側突出部33を有している。   As shown in FIG. 3, the insert material 3 has a substantially T-shaped cross-sectional shape. Specifically, the insert material 3 includes a plate part 31 sandwiched between the peripheral wall 11 of the first work 1 and the lower end part 21 of the second work 2, and a backing part 32 projecting up and down from the plate part 31. Including. The backing portion 32 has a lower protruding portion 34 addressed to the inner surface (the inner peripheral surface of the peripheral wall 11) of the through hole 15 of the first workpiece 1 and an upper protruding portion addressed to the inner peripheral surface 2 b of the second workpiece 2. A portion 33 is provided.

インサート材3は、当該インサート材3に向かってTIGトーチ5のタングステン電極51からアークが生成されることによって溶融し、第1ワーク11の周壁11および第2ワーク2の下端部21と融合する。   The insert material 3 is melted by generating an arc from the tungsten electrode 51 of the TIG torch 5 toward the insert material 3 and is fused with the peripheral wall 11 of the first workpiece 11 and the lower end portion 21 of the second workpiece 2.

インサート材3の径方向におけるプレート部31の幅は、第1ワーク1の周壁11および第2ワーク2の下端部21の厚さと等しくてもよいが、表ビードを良好に形成するために、それらの厚さよりも若干大きいことが望ましい。   The width of the plate portion 31 in the radial direction of the insert material 3 may be equal to the thickness of the peripheral wall 11 of the first workpiece 1 and the lower end portion 21 of the second workpiece 2, but in order to form a front bead well, It is desirable that the thickness is slightly larger than the thickness of.

次に、図4を参照して、インサート材3の形状をより詳しく説明する。   Next, the shape of the insert material 3 will be described in more detail with reference to FIG.

プレート部31は、水平方向にフラットな上面31aおよび下面31b、ならびに先端面31cを有している。先端面31cの断面形状は、裏当部32と反対側に凸となる円弧状であってもよいし、直線であってもよい。   The plate portion 31 has an upper surface 31a and a lower surface 31b that are flat in the horizontal direction, and a tip surface 31c. The cross-sectional shape of the distal end surface 31c may be an arc shape that is convex on the opposite side to the backing portion 32, or may be a straight line.

上側突出部33は、プレート部31の上面31aから略垂直に立ち上がる上側垂直面33aを有し、下側突出部34は、プレート部33の下面31bから略垂直に垂れ下がる下側垂直面34aを有している。   The upper protruding portion 33 has an upper vertical surface 33a that rises substantially vertically from the upper surface 31a of the plate portion 31, and the lower protruding portion 34 has a lower vertical surface 34a that hangs substantially vertically from the lower surface 31b of the plate portion 33. doing.

プレート部31の上面31aから略垂直に立ち上がる上側垂直面33aは、テーパ加工等の傾斜加工が施されている場合は、傾斜面であってもよい。プレート部33の下面31bから略垂直に垂れ下がる下側垂直面34aについても同様である。   The upper vertical surface 33a that rises substantially vertically from the upper surface 31a of the plate portion 31 may be an inclined surface when an inclined process such as a taper process is performed. The same applies to the lower vertical surface 34a that hangs substantially vertically from the lower surface 31b of the plate portion 33.

上側突出部33のプレート部31からの突出高さ(上側垂直面33aの高さ)H1は、下側突出部34のプレート部31からの突出高さ(下側垂直面34aの高さ)H2よりも小さい。上側突出部33の突出高さH1は、下側突出部34の突出高さH2の0.5〜0.8倍であることが望ましい。H1<0.5H2であれば、周壁11にセットされたインサート材3上に第2ワーク2を載置するときに上側突出部33を利用して第2ワーク2を位置決めすることが難しくなり、H1>0.8H2であれば、上側突出部33の溶け残りが起き易くなるからである。すなわち、上側突出部33の突出高さH1を0.5H2以上0.8H2以下とすることにより、上側突出部33を第2ワーク2の位置決めに利用可能としつつ、上側突出部33の溶け残りを効果的に抑制することができる。   The protruding height of the upper protruding portion 33 from the plate portion 31 (the height of the upper vertical surface 33a) H1 is the protruding height of the lower protruding portion 34 from the plate portion 31 (the height of the lower vertical surface 34a) H2. Smaller than. The protrusion height H1 of the upper protrusion 33 is preferably 0.5 to 0.8 times the protrusion height H2 of the lower protrusion 34. If H1 <0.5H2, it is difficult to position the second workpiece 2 using the upper protrusion 33 when the second workpiece 2 is placed on the insert 3 set on the peripheral wall 11, If H1> 0.8H2, it is easy for the upper protrusion 33 to remain undissolved. That is, by setting the protrusion height H1 of the upper protrusion 33 to 0.5H2 or more and 0.8H2 or less, the upper protrusion 33 can be used for positioning of the second workpiece 2 and the undissolved portion of the upper protrusion 33 is removed. It can be effectively suppressed.

裏当部32のプレート部31と反対側の表面32aは、プレート部31を厚さ方向に二等分する平面4上に、プレート部31と反対側に最も突出する頂点35を有する滑らかな凸面である。この凸面は、上側垂直面34aの上端から下側垂直面34bの下端まで連続している。   The surface 32a of the backing portion 32 opposite to the plate portion 31 is a smooth convex surface having a vertex 35 that protrudes most on the opposite side of the plate portion 31 on the plane 4 that bisects the plate portion 31 in the thickness direction. It is. The convex surface is continuous from the upper end of the upper vertical surface 34a to the lower end of the lower vertical surface 34b.

本実施形態では、凸面である表面32aの断面形状は、頂点35から下側垂直面34aの下端までは円弧状であり、頂点35から上側垂直面33aの上端までは曲線状である。   In the present embodiment, the cross-sectional shape of the convex surface 32a is an arc shape from the vertex 35 to the lower end of the lower vertical surface 34a, and is a curved shape from the vertex 35 to the upper end of the upper vertical surface 33a.

裏当部32の上側突出部33が完全にない場合は、TIG溶接後に、第2ワーク2の内周面2bの下部にアンダーカットが発生する。これは、第2ワーク2の下端部21の溶融した表面が同じく溶融したインサート材3の自重によって引っ張られるためであると推測される。これに対し、本実施形態のインサート材3では、裏当部32に上側突出部33を残すことにより、そのようなアンダーカットを防ぐことができる。また、上側突出部33の突出高さH1を下側突出部34の突出高さH2よりも小さくすることにより、上側突出部33の溶け残りを抑制することができる。   When the upper protruding portion 33 of the backing portion 32 is not completely present, an undercut occurs at the lower portion of the inner peripheral surface 2b of the second workpiece 2 after TIG welding. This is presumably because the molten surface of the lower end portion 21 of the second workpiece 2 is pulled by the weight of the molten insert material 3. On the other hand, in the insert material 3 of the present embodiment, such an undercut can be prevented by leaving the upper protruding portion 33 in the backing portion 32. Further, by making the protruding height H1 of the upper protruding portion 33 smaller than the protruding height H2 of the lower protruding portion 34, it is possible to suppress unmelted remaining of the upper protruding portion 33.

さらに、本実施形態では、裏当部32の表面32aの頂点35がプレート部31を厚さ方向に二等分する平面4上に位置しているので、裏当部32における最も入熱量の大きな箇所の厚さを最大とすることができ、熱を上側突出部33および下側突出部34へ効率的に分配することができる。   Furthermore, in this embodiment, since the vertex 35 of the surface 32a of the backing portion 32 is located on the plane 4 that bisects the plate portion 31 in the thickness direction, the heat input amount in the backing portion 32 is the largest. The thickness of the portion can be maximized, and heat can be efficiently distributed to the upper protrusion 33 and the lower protrusion 34.

また、本実施形態では、凸面である表面32が上側垂直面33aの上端から下側垂直面34aの下端まで連続している、換言すればそれらを滑らかに結んでいるので、全幅に亘って均一な形状の裏ビードを形成することができる。   In the present embodiment, the convex surface 32 is continuous from the upper end of the upper vertical surface 33a to the lower end of the lower vertical surface 34a. In other words, they are smoothly connected, so that the entire surface is uniform. A back bead having a simple shape can be formed.

(変形例)
本発明は上述した実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の変形が可能である。
(Modification)
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

例えば、第1ワーク1が第2ワーク2と同サイズの鉛直方向に延びる配管であり、第1ワーク1と第2ワーク2が溶接用インサート材3を介して突合せ溶接されてもよい。また、双方のワーク1,2が鉛直方向に延びる板であり、それらの板同士が直線状の溶接用インサート材を介して突合せ溶接されてもよい。   For example, the first workpiece 1 may be a pipe that extends in the vertical direction and has the same size as the second workpiece 2, and the first workpiece 1 and the second workpiece 2 may be butt welded via the welding insert material 3. Further, both the workpieces 1 and 2 are plates extending in the vertical direction, and these plates may be butt welded via a linear welding insert material.

ただし、前記実施形態のように、第1ワーク1が第2ワーク2よりも横方向に大きなものであれば、図3に示すようにTIGトーチ5を水平方向から上向きに傾いた状態としなければならないため、インサート材3の上側突出部33を小さくしたことによる効果を顕著に得ることができる。   However, if the first workpiece 1 is larger in the lateral direction than the second workpiece 2 as in the above embodiment, the TIG torch 5 must be tilted upward from the horizontal direction as shown in FIG. Therefore, the effect obtained by reducing the upper protrusion 33 of the insert material 3 can be remarkably obtained.

また、インサート材3の裏当部32の凸面である表面32aは、必ずしも上側垂直面33aの上端から下側垂直面34aの下端まで連続している必要はない。例えば、図5に示す変形例のインサート材3’のように、上側突出部33が水平方向にフラットな上面33bを有していて、凸面である表面32aは、上側突出部33の上面33bの内側端部から連続していてもよい。この場合、表面32aの断面形状は、全域に亘って同一半径の円弧であってもよい。   Moreover, the surface 32a which is the convex surface of the backing portion 32 of the insert material 3 does not necessarily have to be continuous from the upper end of the upper vertical surface 33a to the lower end of the lower vertical surface 34a. For example, like the insert material 3 ′ of the modification shown in FIG. 5, the upper protruding portion 33 has an upper surface 33 b that is flat in the horizontal direction, and the surface 32 a that is a convex surface is the upper surface 33 b of the upper protruding portion 33. It may be continuous from the inner end. In this case, the cross-sectional shape of the surface 32a may be an arc having the same radius over the entire area.

本発明の溶接用インサート材は、縦並びのワーク同士を溶接する際に特に有用である。   The insert material for welding of the present invention is particularly useful when welding workpieces arranged in tandem.

1,2 ワーク
3 溶接インサート材
31 プレート部
31a 上面
31b 下面
32 裏当部
32a 表面
33 上側突出部
33a 上側垂直面
34 下側突出部
34a 下側垂直面
35 頂点
4 平面
1, 2 Workpiece 3 Welding insert material 31 Plate portion 31a Upper surface 31b Lower surface 32 Backing portion 32a Surface 33 Upper protrusion 33a Upper vertical surface 34 Lower protrusion 34a Lower vertical surface 35 Vertex 4 Plane

Claims (6)

上下に離間するワーク同士の間に配置される溶接用インサート材であって、
前記ワーク間に挟まれるプレート部と、
前記プレート部から上下に張り出す、上側突出部および下側突出部を有する裏当部と、を備え、
前記上側突出部の前記プレート部からの突出高さは、前記下側突出部の前記プレート部からの突出高さよりも小さい、溶接用インサート材。
It is a welding insert material arranged between workpieces that are spaced apart vertically,
A plate portion sandwiched between the workpieces;
A backing part having an upper protrusion part and a lower protrusion part projecting up and down from the plate part,
The welding insert material, wherein a protruding height of the upper protruding portion from the plate portion is smaller than a protruding height of the lower protruding portion from the plate portion.
前記上側突出部の突出高さは、前記下側突出部の突出高さの0.5〜0.8倍である、請求項1に記載の溶接用インサート材。   The welding insert material according to claim 1, wherein a protruding height of the upper protruding portion is 0.5 to 0.8 times a protruding height of the lower protruding portion. 前記裏当部の前記プレート部と反対側の表面は、前記プレート部を厚さ方向に二等分する平面上に、前記プレート部と反対側に最も突出する頂点を有する滑らかな凸面である、請求項1または2に記載の溶接用インサート材。   The surface of the backing portion opposite to the plate portion is a smooth convex surface having a vertex that protrudes most on the opposite side of the plate portion on a plane that bisects the plate portion in the thickness direction. The welding insert material according to claim 1 or 2. 前記上側突出部は、前記プレート部の上面から略垂直に立ち上がる上側垂直面を有し、
前記下側突出部は、前記プレート部の下面から略垂直に垂れ下がる下側垂直面を有し、
前記凸面は、前記上側垂直面の上端から前記下側垂直面の下端まで連続している、請求項3に記載の溶接用インサート材。
The upper protrusion has an upper vertical surface that rises substantially vertically from the upper surface of the plate portion,
The lower protruding portion has a lower vertical surface that hangs substantially vertically from the lower surface of the plate portion,
The welding insert material according to claim 3, wherein the convex surface is continuous from an upper end of the upper vertical surface to a lower end of the lower vertical surface.
前記凸面の断面形状は、前記頂点から前記下側垂直面の下端までは円弧状であり、前記頂点から前記上側垂直面の上端までは曲線状である、請求項4に記載の溶接用インサート材。   5. The welding insert material according to claim 4, wherein a cross-sectional shape of the convex surface is an arc shape from the apex to a lower end of the lower vertical surface, and a curved shape from the apex to an upper end of the upper vertical surface. . 前記溶接用インサート材は、リング状をなしている、請求項1〜5のいずれか一項に記載の溶接用インサート材。   The welding insert material according to any one of claims 1 to 5, wherein the welding insert material has a ring shape.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1995546A (en) * 1931-12-12 1935-03-26 Gustav W Meier Method of welding
DE3615947C1 (en) * 1986-05-12 1987-10-22 Martin Kainz Welding and centring ring
JPS6376375U (en) * 1986-11-04 1988-05-20
JPH07100644A (en) * 1993-10-05 1995-04-18 Ishikawajima Harima Heavy Ind Co Ltd Inspect member for welding
JPH0819831A (en) * 1994-07-04 1996-01-23 Nikko Youzai Kogyo Kk Device for manufacturing insert ring for butt welding
US20090314757A1 (en) * 2008-06-18 2009-12-24 Caterpillar Inc. Thick gage welding

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1995546A (en) * 1931-12-12 1935-03-26 Gustav W Meier Method of welding
DE3615947C1 (en) * 1986-05-12 1987-10-22 Martin Kainz Welding and centring ring
JPS6376375U (en) * 1986-11-04 1988-05-20
JPH07100644A (en) * 1993-10-05 1995-04-18 Ishikawajima Harima Heavy Ind Co Ltd Inspect member for welding
JPH0819831A (en) * 1994-07-04 1996-01-23 Nikko Youzai Kogyo Kk Device for manufacturing insert ring for butt welding
US20090314757A1 (en) * 2008-06-18 2009-12-24 Caterpillar Inc. Thick gage welding

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