JPS5914064Y2 - Tube flange welding jig - Google Patents

Description

【考案の詳細な説明】 本考案は管体の外周に環状のフランジを溶接する治具に
関する。[Detailed Description of the Invention] The present invention relates to a jig for welding an annular flange to the outer periphery of a pipe body.

管体の外径に公差があるため、管体外周に設ける環状の
フランジの内径は一般に管体外径より若干大きく設定さ
れる。Since there is a tolerance in the outer diameter of the tube, the inner diameter of the annular flange provided on the outer periphery of the tube is generally set to be slightly larger than the outer diameter of the tube.

そのため、フランジを溶接するに際しては、フランジ内
周面と管体外面との間に生じる隙間に詰物を挿入して該
隙間を全周に均一に保持し、仮付けして本溶接を行なっ
ていた。Therefore, when welding a flange, a filler was inserted into the gap between the inner peripheral surface of the flange and the outer surface of the pipe body to maintain the gap uniformly around the entire circumference, and the final welding was performed after temporary welding. .

そのため、作業が煩雑で非能率であった。Therefore, the work was complicated and inefficient.

また、上記詰物による隙間保持が不均一となり、フラン
ジに設けられたボルト孔位置の精度が不十分となること
がある。In addition, the gap maintained by the filler becomes uneven, and the accuracy of the position of the bolt hole provided in the flange may become insufficient.

本考案は、簡単な作業でフランジ内周面と管体外面との
間の隙間を確実に均一に保持でき、かつ仮付けをせずに
本溶接を行なうことのできる治具を提供するものである
。The present invention provides a jig that can reliably maintain a uniform gap between the inner circumferential surface of the flange and the outer surface of the pipe body with simple work, and that can perform main welding without tack welding. be.

このため本考案は、管体の外周に着脱可能に取付けられ
る締付バンドに、複数個の治具本体を周方向適当間隔お
きに設け、管体の外周に遊嵌する環状のフランジと管体
外面との間の隙間に挿入されるフランジ載置突部を治具
本体に突設し、該フランジ載置突部は先端側が肉薄とな
るテーパ状に形成し、前記フランジにおけるフランジ載
置突部の挿入側とは反対側の側面に保合可能なＬ字形の
フック部材を有するフランジ保持器を治具本体に設けた
ものである。Therefore, in the present invention, a plurality of jig bodies are provided at appropriate intervals in the circumferential direction on a tightening band that is removably attached to the outer periphery of the tube, and an annular flange that loosely fits around the outer periphery of the tube and A flange placement protrusion inserted into the gap between the outside surface and the jig body is provided protrudingly from the jig main body, and the flange placement protrusion is formed in a tapered shape with a thinner wall on the tip side, and the flange placement protrusion on the flange The jig body is provided with a flange holder having an L-shaped hook member that can be held on the side opposite to the insertion side of the jig.

以下本考案の一実施例を図面に基づいて説明する。An embodiment of the present invention will be described below based on the drawings.

１は管体、２は溶接すべき環状のフランジであり、フラ
ンジ２には複数個のボルト孔３が設けられている。Reference numeral 1 indicates a tube body, 2 indicates an annular flange to be welded, and the flange 2 is provided with a plurality of bolt holes 3.

４は管体１の外周に取付ける締付バンドであり、締付バ
ンド４に複数個の治具本体５が周方向適当間隔おきに設
けられている。Reference numeral 4 denotes a tightening band attached to the outer periphery of the tubular body 1, and a plurality of jig bodies 5 are provided on the tightening band 4 at appropriate intervals in the circumferential direction.

治具本体５は本実施例では４個設けているが、２個であ
っても、４個以上であってもよい。Although four jig bodies 5 are provided in this embodiment, the number may be two or four or more.

締付バンド４は周方向一つの割りの金属リングからなり
、その面分割端の突壁６ ａ 、６ ｂの孔間に挿通さ
れたボルト・ナツト７を締付けることにより、管体１に
固定される。The tightening band 4 consists of a metal ring split into one circumferential direction, and is fixed to the tube body 1 by tightening bolts and nuts 7 inserted between the holes in the projecting walls 6 a and 6 b at the end of the split surface. Ru.

各治具本体５にはフランジ２の内周面と管体１の外面と
の間の隙間８に挿入されるフランジ載置突部９と、フラ
ンジ保持器１０とが設けられている。Each jig main body 5 is provided with a flange mounting protrusion 9 inserted into the gap 8 between the inner peripheral surface of the flange 2 and the outer surface of the tube body 1, and a flange holder 10.

フランジ載置突部９は先端側が肉薄となったテーパ状断
面の板状に形成され、かつその表裏面はフランジ２の内
周面および管体１の外面の曲率に応じた円弧状曲面に形
成されている。The flange mounting protrusion 9 is formed into a plate shape with a tapered cross section with a thin wall on the tip side, and its front and back surfaces are formed into arcuate curved surfaces corresponding to the curvature of the inner circumferential surface of the flange 2 and the outer surface of the tube body 1. has been done.

フランジ載置突部９の表面および両側面には、目盛１１
が設けられている。A scale 11 is provided on the surface and both side surfaces of the flange mounting protrusion 9.
is provided.

フランジ保持器１０は、フランジ２の側面に係合するＬ
字形のフック部材１２に雄ねじ部１３を突設し、該雄ね
じ部１３を治具本体５の孔１４に挿入してナツト１５を
螺着し、かつフランジ２の外周面に先端が接当する押え
ボルト１６をフック部材１２のねし孔に螺着したもので
ある。The flange retainer 10 has an L that engages with the side surface of the flange 2.
A presser foot in which a male threaded portion 13 is protruded from a hook member 12 in the shape of a letter, the male threaded portion 13 is inserted into a hole 14 of a jig main body 5, a nut 15 is screwed, and the tip is in contact with the outer circumferential surface of a flange 2. A bolt 16 is screwed into a tapped hole of the hook member 12.

次に上記治具の使用方法について説明する。Next, how to use the above jig will be explained.

まず、管体１に、フランジ２を取付けるおよその位置に
締付バンド４を嵌め込み、分割部のボルト・ナツト７を
軽く締めつける。First, the tightening band 4 is fitted into the tube body 1 at the approximate position where the flange 2 is to be attached, and the bolts and nuts 7 at the divided portions are lightly tightened.

つぎに、溶接するフランジ２をフランジ保持器１０のフ
ック部材１２をくぐらせて第２図のように配置する。Next, the flange 2 to be welded is passed through the hook member 12 of the flange retainer 10 and placed as shown in FIG.

そして、フランジ２をフランジ載置突部９の傾斜した上
面の適宜位置に載せることにより、フランジ２と管体１
間の隙間が全周に均一になるようにする。Then, by placing the flange 2 on an appropriate position on the inclined upper surface of the flange mounting projection 9, the flange 2 and the pipe body 1 are
Make sure the gaps are even around the entire circumference.

隙間８か゛全周に均一になっているか否かはフランジ載
置突部９の目盛１１で確認する。Check whether the gap 8 is uniform over the entire circumference by checking the scale 11 on the flange mounting protrusion 9.

確認後、フック部材１２の雄ねじ部１３のナツト１５お
よび押えボルト１６を締め付ける。After checking, the nut 15 of the male threaded portion 13 of the hook member 12 and the holding bolt 16 are tightened.

この後、フランジ２の管体１に対する取付位置を確認し
、締付バンド４のボルト・ナツト７を締付ける。After this, the attachment position of the flange 2 to the tube body 1 is confirmed, and the bolts and nuts 7 of the tightening band 4 are tightened.

このようにして準備が完了すると、フランジ２のフック
部材１２側の側面と管体１との本溶接ａを行なう。When the preparations are completed in this manner, the main welding a between the side surface of the flange 2 on the side of the hook member 12 and the pipe body 1 is performed.

このとき、フランジ２はこの治具により管体１に強固に
保持されているので、仮付けが不要であり、作業が簡単
となるうえ、仮付けを行なわずに本溶接を行なうことか
らアークの安定性がよく、きれいな溶接ビードが得られ
る。At this time, since the flange 2 is firmly held on the tube body 1 by this jig, there is no need for temporary attachment, which simplifies the work, and since the main welding is performed without temporary attachment, there is no arc. It has good stability and produces a clean weld bead.

なお、フランジ２を管端面に取付ける場合には、仮付は
溶接を行なう。In addition, when attaching the flange 2 to the pipe end surface, welding is used for temporary attachment.

また、従来の溶接法であると、フランジ２の片側の溶接
を行なうと溶接をした方へ倒れるが、この治具によると
フランジ２の確実な保持がなされるので、フランジ２が
倒れる問題がない。In addition, with conventional welding methods, if one side of the flange 2 is welded, it will fall toward the welded side, but with this jig, the flange 2 is held securely, so there is no problem of the flange 2 falling. .

片側の溶接が完了すると、治具を取り外し、フランジ２
の他側面の本溶接を行なう。When welding on one side is completed, remove the jig and attach flange 2.
Perform main welding on the other side.

以上説明したように、本考案の治具を用いれば、簡単な
作業でフランジと管体間の隙間を全周にわたり均一にす
ることができ、またフランジの確実な保持ができるので
、仮付けが不用で作業能率がよく、かつ片側溶接時のフ
ランジの倒れの問題がない。As explained above, by using the jig of the present invention, the gap between the flange and the pipe body can be made uniform over the entire circumference with a simple operation, and the flange can be held securely, so temporary attachment is possible. It is unnecessary, improves work efficiency, and eliminates the problem of the flange collapsing when welding on one side.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本考案の一実施例を示し、第１図は治具の管体へ
の装着状態を示す正面図、第２図は第１図の■−Ｉ線断
面図、第３図は治具の管体への装着状態を示す平面図、
第４図は第３図のＩ■−■■線断面図である。 １・・・・・・管体、２・・・・・・フランジ、４・・
・・・・締付バンド、５・・・・・・治具本体、８・・
・・・・隙間、９・・・・・・フランジ載置突部、１０
・・・・・・フランジ保持器、１１・・・・・・目盛、
１２・・・・・・フック部材、１６・・・・・・押えボ
ルト。The drawings show one embodiment of the present invention; Fig. 1 is a front view showing how the jig is attached to the pipe body, Fig. 2 is a sectional view taken along the line ■-I of Fig. 1, and Fig. 3 is the jig. A plan view showing how it is attached to the pipe body,
FIG. 4 is a sectional view taken along the line I■-■■ in FIG. 3. 1... Pipe body, 2... Flange, 4...
...Tightening band, 5...Jig body, 8...
...Gap, 9...Flange mounting protrusion, 10
...Flange retainer, 11...Scale,
12... Hook member, 16... Holder bolt.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 管体の外周に着脱可能に取付けられる締付バンドに、複
数個の治具本体を周方向適当間隔おきに設け、管体の外
周に遊嵌する環状のフランジと管体外面との間の隙間に
挿入されるフランジ載置突部を治具本体に突設し、該フ
ランジ載置突部は先端部が肉薄となるテーパ状に形成し
、前記フランジにおけるフランジ載置突部の挿入側とは
反対側の側面に係合可能なＬ字形のフック部材を有する
フランジ保持器を治具本体に設けたことを特徴とする管
体のフランジ溶接治具。A plurality of jig bodies are provided at appropriate intervals in the circumferential direction on a tightening band that is removably attached to the outer circumference of the tube, and the gap between the annular flange that fits loosely around the outer circumference of the tube and the outer surface of the tube is fixed. A flange placement protrusion to be inserted into the jig body is provided protrudingly on the jig body, and the flange placement protrusion is formed in a tapered shape with a thin tip, and the insertion side of the flange placement protrusion in the flange is A flange welding jig for a pipe body, characterized in that the jig body is provided with a flange retainer having an L-shaped hook member that can be engaged with the opposite side surface.