JP3042570B2 - Welding apparatus and welding method for square steel pipe - Google Patents
Welding apparatus and welding method for square steel pipeInfo
- Publication number
- JP3042570B2 JP3042570B2 JP4361330A JP36133092A JP3042570B2 JP 3042570 B2 JP3042570 B2 JP 3042570B2 JP 4361330 A JP4361330 A JP 4361330A JP 36133092 A JP36133092 A JP 36133092A JP 3042570 B2 JP3042570 B2 JP 3042570B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- passes
- square steel
- bead
- steel pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Butt Welding And Welding Of Specific Article (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ビル建設などで建築材
料として使用される角鋼管同士を、建設現場で自動的に
突き合わせて溶接する角鋼管の溶接装置及び溶接方法に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding apparatus and a welding method for a square steel pipe for automatically butting and welding square steel pipes used as building materials in building construction or the like at a construction site.
【０００２】[0002]
【従来の技術】建設現場で使用される角鋼管を上下に突
き合わせて、その接合部を溶接する作業は従来は半自動
であり、熟練した作業者の技術が必要であった。この場
合まず角鋼管同士を突き合わせ、エレクションピースで
上下の角鋼管を仮止めして固定し、その後、例えば二人
の作業者が角鋼管の対向する両側でエレクションピース
とエレクションピースの間を同時に溶接する。これは角
鋼管が歪などで一方へ傾くことを防止するためである。
次にエレクションピースを取り外し、残りの部分につい
ても同じように両側から同時に溶接して、上下の角鋼管
の接合部の一周分を溶接する。このとき最初の溶接で形
成されたビードの端部と次の溶接で形成されるビードの
端部の継目を滑らかにすることが必要であり、場合によ
っては溶接後にグラインダーなどによって平滑処理を行
う。2. Description of the Related Art Conventionally, the work of welding square steel pipes used at a construction site up and down and welding the joint thereof has been semi-automatic, and requires the skills of a skilled worker. In this case, first, the square steel pipes are butted together, and the upper and lower square steel pipes are temporarily fixed and fixed with the erection piece, and then, for example, two workers simultaneously weld the erection piece and the erection piece on opposite sides of the square steel pipe. I do. This is to prevent the square steel pipe from leaning to one side due to distortion or the like.
Next, the erection piece is removed, and the remaining part is welded simultaneously from both sides in the same manner, and one round of the joint between the upper and lower square steel pipes is welded. At this time, it is necessary to smooth the seam between the end of the bead formed by the first welding and the end of the bead formed by the next welding. In some cases, a smoothing process is performed by a grinder or the like after the welding.
【０００３】[0003]
【発明が解決しようとする課題】ところで、従来の角鋼
管の突き合わせ溶接装置は半自動的であるため作業能率
が低く、したがって工事の促進を図ることが難しいとい
う問題がある。また、作業が半自動であるため作業者に
熟練した高い溶接技能が要求される。このため初心者が
かかる作業を行うのは難しく、このことも作業能率の低
下につながるという問題がある。The conventional butt-welding apparatus for square steel pipes has a problem that it is semi-automatic and therefore has a low work efficiency, so that it is difficult to promote the work. In addition, since the work is semi-automatic, a skilled and high welding skill is required for the worker. For this reason, it is difficult for a beginner to perform such work, which also causes a problem that the work efficiency is reduced.
【０００４】また、最初に角鋼管の対向する両側を同時
に溶接し、次にエレクションピースを取り外して残りの
部分を溶接するので、両方の溶接で形成されるビードの
端部を滑らかにするのが難しく、グラインダーなどによ
る平滑処理が必要となって更に作業能率が低下するとい
う問題がある。[0004] Further, since the opposite sides of the square steel pipe are first welded at the same time, then the erection piece is removed and the remaining part is welded, it is necessary to smooth the end of the bead formed by both weldings. It is difficult, and there is a problem that a smoothing process by a grinder or the like is required and the working efficiency is further reduced.
【０００５】本発明は上記事情に基づいてなされたもの
であり、角鋼管の突き合わせ溶接を自動的に行うことに
より作業能率を向上させることができ、かつビードの継
目も滑らかにすることができる角鋼管の溶接装置及び溶
接方法を提供することを目的とするものである。The present invention has been made in view of the above circumstances, and it is possible to improve work efficiency by automatically performing butt welding of square steel pipes, and to make corner joints of a bead smooth. It is an object of the present invention to provide a welding device and a welding method for a steel pipe.
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成するた
めの第１の発明は、互いに突き合わせた上下の角鋼管の
うちの一方に装着され前記上下の角鋼管の接合部に沿っ
て角鋼管の周りを取り囲む閉鎖型レールと、溶接トーチ
を搬送しながら前記閉鎖型レール上を移動する複数の台
車と、前記溶接トーチの動作及び前記台車の速度などを
制御する制御装置と、既に溶接されたビードに新たに溶
接するビードをつなぐときに前記既に溶接されたビード
の端部を検出する手段とを備え、仮止め手段で仮止めさ
れた接合部を除いて前記接合部の一部を自動的に溶接す
るとともに仮止め手段を取り除いた後で残りの接合部を
自動的に溶接することを特徴とするものである。According to a first aspect of the present invention, there is provided a rectangular steel pipe mounted on one of upper and lower rectangular steel pipes abutting on each other and along a joint of the upper and lower rectangular steel pipes. A closed type rail surrounding the periphery of the welding torch, a plurality of bogies moving on the closed type rail while transporting the welding torch, a control device for controlling the operation of the welding torch and the speed of the bogie, etc. Means for detecting the end of the already welded bead when connecting a bead to be newly welded to the bead, and automatically excluding a part of the joint except for the joint temporarily fixed by the temporary fixing means. And, after removing the temporary fixing means, automatically weld the remaining joints.
【０００７】上記の目的を達成するための第２の発明
は、上下に突き合わせて仮止め手段で仮止めした角鋼管
について仮止めされた部分以外の接合部の一部を所定の
パス数よりも少ないパス数で第１の溶接作業を行い、前
記仮止め手段を取り外し、前記第１の溶接作業で溶接さ
れた接合部以外の接合部について前記第１のパス数と同
じパス数で第２の溶接作業を行い、前記第１の溶接作業
及び第２の溶接作業がなされた接合部の上において第１
及び第２の溶接作業のパス数との合計が前記所定のパス
数となるだけのパス数で第３の溶接作業を行うことによ
り、前記角鋼管の一周にわたって前記所定のパス数によ
る溶接を行うことを特徴とするものである。A second invention for achieving the above object is to reduce a part of a joint other than a part temporarily fixed with respect to a square steel pipe temporarily butted by means of a temporary fixing means by a predetermined number of passes. The first welding operation is performed with a small number of passes, the temporary fixing means is removed, and the second joint is formed with the same number of passes as the first number of passes for the joints other than the joints welded in the first welding operation. A welding operation is performed, and the first welding operation and the second welding operation are performed on the joint on which the first welding operation and the second welding operation have been performed.
By performing the third welding operation with the number of passes such that the sum of the number of passes and the number of passes of the second welding operation becomes the predetermined number of passes, welding is performed with the predetermined number of passes over the entire circumference of the square steel pipe. It is characterized by the following.
【０００８】上記の目的を達成するための第３の発明
は、請求項２記載の角鋼管の溶接方法において、第１の
溶接作業によって溶接されるビードの端部を所定のパス
数よりも少ないパス数でカスケード状とし、第２の溶接
作業によって溶接される前記残りのビードの端部は前記
第１の溶接作業のパス数と同じパス数で第１の溶接作業
によって溶接されたビードのカスケード状の端部に重な
るようにして溶接し、前記第１の溶接作業及び第２の溶
接作業がなされた接合部の上において第１及び第２の溶
接作業のパス数との合計が前記所定のパス数となるだけ
のパス数で第３の溶接作業を行うことを特徴とするもの
である。According to a third aspect of the present invention, in the method for welding a square steel pipe according to the second aspect, the end of the bead to be welded by the first welding operation is smaller than a predetermined number of passes. The number of passes is cascaded, and the end of the remaining bead to be welded by the second welding operation is the same as the number of passes of the first welding operation. The first welding operation and the second welding operation are performed on the joint where the first welding operation and the second welding operation have been performed, and the total number of the first and second welding operations is equal to the predetermined number. It is characterized in that the third welding operation is performed with the number of passes equal to the number of passes.
【０００９】[0009]
【作用】第１の発明に係る装置は前記の構成により、閉
鎖型レールを角鋼管に取り付けて溶接作業を行うことに
より、上下の角鋼管を接合する間にレールの取り外し作
業が不要である。また複数の台車で同時に溶接作業を行
うことにより、作業中に角鋼管が溶接時の熱により一方
へ傾くという心配はなく、また作業能率も向上する。更
に、ビードの端部を検出する手段を設けることにより、
ビード継ぎも自動的に行うことができ、溶接作業の省力
化を図ることができる。The apparatus according to the first aspect of the present invention has the above-mentioned construction, and by performing the welding operation by attaching the closed type rail to the square steel pipe, it is not necessary to remove the rail while joining the upper and lower square steel pipes. In addition, by performing the welding operation on a plurality of trolleys at the same time, there is no fear that the square steel pipe is tilted to one side due to heat generated during welding during the operation, and the operation efficiency is improved. Furthermore, by providing a means for detecting the end of the bead,
The bead joining can also be performed automatically, and the labor of the welding operation can be saved.
【００１０】第２の発明に係る方法は前記の構成によ
り、第１の溶接作業を行うことによりこの溶接が仮止め
の役割を果たすので、第１の溶接作業の後に仮止め手段
であるエレクションピースを取り外すことができる。そ
して第２の溶接作業を行うことにより、角鋼管の接合部
全体が第１の溶接作業のパス数と同じパス数で溶接され
る。更にこの上に第３の溶接作業を行うことにより、所
定のパス数の溶接が完了する。In the method according to the second aspect of the present invention, the first welding operation is performed so that the welding plays a role of a temporary fixing. Therefore, after the first welding operation, the erection piece as the temporary fixing means is provided. Can be removed. Then, by performing the second welding operation, the entire joint portion of the square steel pipe is welded with the same number of passes as the first welding operation. Further, by performing a third welding operation thereon, welding of a predetermined number of passes is completed.
【００１１】第３の発明に係る方法は前記の構成によ
り、第１の溶接作業によるビードの端部をカスケード状
とすることにより、通常の溶接でビードの端部に使用さ
れるタブ材が不要となる。そして第２の溶接作業による
ビードの端部をこのカスケード状の端部の上に重ねて溶
接することにより、滑らかなビード継ぎが形成される。In the method according to the third aspect, the end of the bead formed by the first welding operation is formed in a cascade shape by the above structure, so that the tab material used for the end of the bead in ordinary welding is unnecessary. Becomes Then, the bead end by the second welding operation is overlapped and welded on this cascade-shaped end to form a smooth bead joint.
【００１２】[0012]
【実施例】以下に図面を参照して本発明の実施例を説明
する。図１は本発明の一実施例である自動溶接装置の側
面図、図２はその自動溶接装置の正面図である。また図
３は被溶接物である角鋼管を突き合わせて仮止めした状
態を示す斜視図、図４は角鋼管に自動溶接装置のための
レールを取り付けた状態の右半分を示す平面図、図５は
角鋼管を溶接する手順を示す角鋼管の断面図である。な
お、ここでは図３に示すようにビル建設素材として使用
される角鋼管１０及び１２を溶接部１４において上下に
突き合わせて溶接する場合について説明する。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of an automatic welding apparatus according to one embodiment of the present invention, and FIG. 2 is a front view of the automatic welding apparatus. 3 is a perspective view showing a state in which square steel pipes to be welded are butted and temporarily fixed. FIG. 4 is a plan view showing a right half of a state in which rails for an automatic welding device are attached to the square steel pipe. FIG. 2 is a cross-sectional view of the square steel pipe showing a procedure for welding the square steel pipe. Here, as shown in FIG. 3, a case will be described in which square steel pipes 10 and 12 used as a building construction material are butt-welded vertically at a welded portion 14.
【００１３】溶接を行う前に、まず角鋼管１０と１２を
互いに突き合わせ、エレクションピース１６で両者を仮
止め固定する。このエレクションピース１６は図示しな
いボルト等で固定されるものである。その後、図４に示
すように角鋼管１０に移動用のレール１８を固定する。
このレール１８は、角鋼管１０の互いに対向する面を固
定手段２０で挟み、ボルト２２を締めつけることにより
両側から押えるようにして角鋼管に固定される。なお、
図４ではレール１８の右半分しか描かれていないが、レ
ール１８は閉鎖型のレールであり、角鋼管１０（又は１
２）の周囲を取り囲むように取り付けられる。Prior to welding, first, the square steel pipes 10 and 12 are butted against each other, and the two are temporarily fixed by an erection piece 16. The erection piece 16 is fixed by a bolt or the like (not shown). Thereafter, as shown in FIG. 4, the rail 18 for movement is fixed to the square steel pipe 10.
The rails 18 are fixed to the square steel pipe 10 by sandwiching the mutually facing surfaces of the square steel pipe 10 with fixing means 20 and tightening bolts 22 so that the rails 18 can be pressed from both sides. In addition,
Although only the right half of the rail 18 is illustrated in FIG. 4, the rail 18 is a closed type rail and the square steel pipe 10 (or 1).
It is attached to surround the circumference of 2).
【００１４】図１及び図２に示すように、レール１８上
には溶接台車３０及び走行台車３４が設けられている。
溶接台車３０及び走行台車３４はいずれもレール１８の
上下から一組につき４個のベアリング３２で支持され、
これがもう一方の側、すなわち図１の奥行き方向にもう
一組設けられ、合計８個のベアリングで支持されてい
る。また、走行台車３４と溶接台車３０はジョイント３
６によって互いに連結されている。レール１８上にはラ
ック３８が設けられており、走行台車３４に設けられた
駆動可能な歯車４０がこのラック３８と噛合している。
したがって、歯車４０を駆動することにより、走行台車
３４及びこれに連結された溶接台車３０をレールに沿っ
て移動させることができる。As shown in FIGS. 1 and 2, a welding carriage 30 and a traveling carriage 34 are provided on the rail 18.
Each of the welding carriage 30 and the traveling carriage 34 is supported by four bearings 32 per set from above and below the rail 18,
This is provided on the other side, that is, in the depth direction of FIG. 1, and is supported by a total of eight bearings. The traveling carriage 34 and the welding carriage 30 are connected to the joint 3.
6 are connected to each other. A rack 38 is provided on the rail 18, and a drivable gear 40 provided on the traveling carriage 34 meshes with the rack 38.
Therefore, by driving the gear 40, the traveling vehicle 34 and the welding vehicle 30 connected thereto can be moved along the rail.
【００１５】溶接台車３０の下部には、先端から溶接ワ
イヤ４４を送給する溶接トーチ４２が設けられている。
この溶接トーチ４２はガスメタルアーク溶接用の溶接ト
ーチで、溶接台車３０によるレール１８に沿った移動
（これをｘ方向とする）の他、図１に示すようにｙ方向
及びｚ方向にも移動できる。したがって、この溶接トー
チ４２の先端部は、被溶接物の任意の位置へ移動させる
ことができる。また、溶接トーチ自体を揺動させて先端
部にいわゆるウィービング動作を行わせることもでき
る。溶接条件は、アーク電圧を一定とした場合には、溶
接台車３０の走行速度と溶接ワイヤ４４の送給速度によ
って決定される。A welding torch 42 for feeding a welding wire 44 from the tip is provided below the welding carriage 30.
The welding torch 42 is a welding torch for gas metal arc welding. In addition to the movement along the rail 18 by the welding carriage 30 (this is defined as the x direction), the welding torch 42 also moves in the y and z directions as shown in FIG. it can. Therefore, the tip of the welding torch 42 can be moved to any position on the workpiece. Further, the welding torch itself can be swung to cause a so-called weaving operation to be performed at the tip end. The welding conditions are determined by the traveling speed of the welding bogie 30 and the feeding speed of the welding wire 44 when the arc voltage is constant.
【００１６】図１又は図２の溶接台車３０は、図４のレ
ール１８に沿って移動しながら、角鋼管１０の曲線部と
直線部とを連続的に溶接する。このように連続的に溶接
すると、直線部と曲線部の境目でビード継ぎを行う必要
がない。更に本実施例では直線部と曲線部におけるビー
ドの高さが均一となるよう、予め求めた曲線部の曲率か
ら曲線部における最適な溶接速度を計算し、これに基づ
いて曲線部における台車の速度を制御する手段を含んで
いる。これについては本出願人による特許出願（特願平
４−３３５５９９号）に詳細に述べられている。なお、
本実施例では一つの接合部について複数回のパスで溶接
する溶接多層盛り溶接を前提としており、一つの箇所を
溶接する場合でも一回のパスでの一層分のビード厚みは
薄く、これを複数層にわたって重ねることにより所定の
厚さとする。The welding cart 30 shown in FIG. 1 or 2 continuously welds the curved portion and the straight portion of the square steel pipe 10 while moving along the rail 18 shown in FIG. When welding is performed continuously in this manner, it is not necessary to perform bead joining at a boundary between a straight portion and a curved portion. Further, in this embodiment, the optimum welding speed in the curved portion is calculated from the curvature of the curved portion determined in advance so that the height of the bead in the straight portion and the curved portion is uniform, and the speed of the bogie in the curved portion is calculated based on the calculated welding speed. Control means. This is described in detail in a patent application (Japanese Patent Application No. 4-335599) filed by the present applicant. In addition,
The present embodiment is based on the premise that multi-pass welding is performed for a single joint in a plurality of passes, and even when a single location is welded, the bead thickness for one pass in a single pass is thin. A predetermined thickness is obtained by overlapping the layers.
【００１７】次に、図５（Ａ）〜（Ｃ）を参照して本発
明の装置を用いた角鋼管の溶接手順について説明する。
まず図５（Ａ）において、エレクションピースによって
上下の角鋼管１０及び１２を仮止めする。そして、この
角鋼管１０及び１２の接合部のうちエレクションピース
が取り付けられていない部分、すなわち図５（Ａ）の左
右の部分２６ａについて同時に、例えば３パス程度の溶
接を行う。なお、２６ａの溶接を行う際には従来から行
われていたように、前もって端部にビードの端部を整形
するためのタブ材（図示せず）を配置する。このタブ材
としてはセラミックタブもしくはフラックスタブを使用
することができる。Next, a procedure for welding a square steel pipe using the apparatus of the present invention will be described with reference to FIGS.
First, in FIG. 5A, the upper and lower square steel pipes 10 and 12 are temporarily fixed by an erection piece. Then, for example, about three passes of welding are simultaneously performed on the joints of the square steel pipes 10 and 12 to which the erection piece is not attached, that is, the left and right parts 26a in FIG. 5A. When welding 26a, a tab material (not shown) for shaping the end of the bead is arranged at the end in advance as conventionally performed. As this tab material, a ceramic tab or a flux tab can be used.
【００１８】２６ａの部分の溶接が行われると、上下の
角鋼管１０及び１２は一応固定された状態となるので、
この時点で仮止めのためのエレクションピース１６を取
り外し、またタブ材も外す。次に図５（Ｂ）に示すよう
にエレクションピース１６が仮止めされていた部分２６
ｂについて、最初の溶接と同じパス数（３パス）だけの
溶接を行う。そして最後に、これら２６ａ，２６ｂの部
分の上層において角鋼管の周囲全体にわたり複数回のパ
スで２６ｃの部分の溶接を行う。これにより最終的に所
定のパス数の溶接が行われる。When welding of the portion 26a is performed, the upper and lower square steel pipes 10 and 12 are temporarily fixed.
At this point, the erection piece 16 for temporary fixing is removed, and the tab material is also removed. Next, as shown in FIG. 5B, the portion 26 where the erection piece 16 was temporarily fixed is shown.
For b, welding is performed for the same number of passes (3 passes) as the first welding. Finally, in the upper layer of the portions 26a and 26b, the portion 26c is welded in a plurality of passes over the entire periphery of the square steel pipe. Thereby, welding of a predetermined number of passes is finally performed.
【００１９】上の実施例では溶接ビード２６ａの端部に
タブ材を使用したが、更に本発明では上記のようなタブ
材を使用しないで済む方法を開示する。タブ材を設けな
いで各層のビードの端部をみな同じ位置まで延ばすと、
溶融した状態の溶接金属が流れ出してしまうので、ここ
では溶接ビードの端部２７を図６（Ａ）の拡大図に示す
ように斜めに傾斜させる。この端部２７を上から見ると
ちょうどカスケード状となっている。このように溶接ビ
ードの端部をカスケード状とするには、上の溶接層の端
部が下の溶接層の端部に達する前に溶接を終了するよう
に各層を積層するという作業を繰り返す。そして次に２
６ｂの部分を溶接する場合には、２６ａの場合とは反対
に、上の溶接層の端部が下の溶接層の端部より先へ行く
まで溶接を行い各層を積層するという作業を繰り返す。
このようにすると２６ａの端部と２６ｂの端部は図６
（Ｂ）に示すように互いに重なり合い、最終的に得られ
るビード継目の表面は滑らかなものとなる。Although the above embodiment uses the tab material at the end of the weld bead 26a, the present invention further discloses a method that does not require the use of the tab material as described above. If all the bead ends of each layer are extended to the same position without providing a tab material,
Since the weld metal in a molten state flows out, the end portion 27 of the weld bead is inclined obliquely as shown in the enlarged view of FIG. When viewed from above, the end portion 27 has a cascade shape. In order to form the ends of the weld bead in a cascade in this manner, the operation of stacking the layers so that welding is completed before the end of the upper weld layer reaches the end of the lower weld layer is repeated. And then 2
When welding the portion of 6b, contrary to the case of 26a, the operation of repeating welding and stacking each layer is repeated until the end of the upper welding layer goes ahead of the end of the lower welding layer.
In this way, the end of 26a and the end of 26b are
As shown in (B), they overlap each other, and the surface of the finally obtained bead seam becomes smooth.
【００２０】なお、上記のように本実施例では角鋼管の
周囲全体にわたって閉鎖型レールが取り付けられるの
で、上で説明した一連の溶接作業を行う際にレールを付
け換える必要がないという利点がある。As described above, in this embodiment, since the closed type rail is attached to the entire periphery of the square steel pipe, there is an advantage that it is not necessary to replace the rail when performing the above-described series of welding operations. .
【００２１】上記の図５（Ａ）〜（Ｃ）の溶接作業にお
いて、２６ａの部分を溶接した後に２６ｂの部分を溶接
する際に溶接トーチ４２は、既に溶接されているビード
２６ａの端部の位置を知っておく必要がある。この場
合、作業者がティーチングによって溶接ロボットにこれ
を教え込む方法もあるが、本実施例では以下の二つの方
法によってビード２６ａの端部位置を検出する。In the welding operation shown in FIGS. 5A to 5C, when welding the portion 26b after welding the portion 26a, the welding torch 42 uses the welding torch 42 at the end of the already welded bead 26a. You need to know the location. In this case, there is a method in which the operator teaches the welding robot to this by teaching, but in this embodiment, the end position of the bead 26a is detected by the following two methods.
【００２２】第１の方法は、いわゆるワイヤタッチ方法
で、まず２６ａの部分の溶接作業が終了した後に、溶接
トーチ４２の溶接ワイヤ４４と角鋼管１０（又は１２）
との間に所定の電圧を印加した状態で溶接トーチ４２を
溶接前の２６ｂの経路に沿って移動させる。このとき溶
接ワイヤが２６ａの端部に達すると前記の電圧及び流れ
る電流が変化するので、この電圧又は電流の変化を検出
することにより間接的にビード２６ａの端部位置を検出
する。そして、この位置を記憶しておき、この記憶情報
に基づいて２６ｂの部分の溶接作業を行い、２６ａの端
部と２６ｂの端部にビード継目を自動的に形成する。か
かる方法を用いると、２６ｂの部分の溶接の自動化がよ
り促進され、作業能率が向上するとともに作業者に特別
の熟練は要求されない。The first method is a so-called wire touch method. First, after the welding operation of the portion 26a is completed, the welding wire 44 of the welding torch 42 and the square steel pipe 10 (or 12) are used.
The welding torch 42 is moved along the path 26b before welding in a state where a predetermined voltage is applied between the welding torch 42 and the welding torch 42. At this time, when the welding wire reaches the end of 26a, the voltage and the flowing current change. By detecting the change in the voltage or the current, the end position of the bead 26a is indirectly detected. Then, this position is stored, and based on this stored information, the welding operation of the portion 26b is performed, and a bead seam is automatically formed at the end of 26a and the end of 26b. By using such a method, automation of welding of the portion 26b is further promoted, work efficiency is improved, and no special skill is required for the operator.
【００２３】第２の方法は、図５（Ａ）において、まず
２６ａの部分の溶接を行い、その後直ちに２６ｂの部分
の溶接作業を開始する。そしてこの作業の期間中におい
て溶接電流を常時計測し、当該溶接電流の変化に基づい
てビード２６ａの端部位置を検出し、これによりビード
２６ａの端部とビード２６ｂの端部にビード継目を自動
的に形成するというものである。この場合にも、自動化
がより促進され、作業能率が向上するとともに作業者に
特別の熟練は要求されないという利点がある。In the second method, as shown in FIG. 5A, first, welding of the portion 26a is performed, and immediately thereafter, welding work of the portion 26b is started. During this operation, the welding current is constantly measured, and the end position of the bead 26a is detected based on the change in the welding current, whereby the bead seam is automatically formed at the end of the bead 26a and the end of the bead 26b. That is to form it. Also in this case, there is an advantage that automation is further promoted, work efficiency is improved, and no special skill is required for the operator.
【００２４】本発明は、上記の実施例に限定されるもの
ではなく、その要旨の範囲内で種々の変形が可能であ
る。The present invention is not limited to the above embodiment, and various modifications are possible within the scope of the invention.
【００２５】[0025]
【発明の効果】以上説明したように本発明によれば、従
来はほとんど手作業で行っていた建築作業現場での角鋼
管の突合せ溶接の作業を自動化して行うことができ、し
かも角鋼管の周囲の全体にわたるレールを設けることに
より、作業効率の向上、作業人員の削減、溶接品質の安
定化という利点が得られるとともに、作業者の熟練も必
要ない角鋼管の溶接装置及び溶接方法を提供することが
できる。As described above, according to the present invention, it is possible to automate the butt welding work of a square steel pipe at a construction work site, which has conventionally been performed almost manually, and to perform the welding of the square steel pipe. By providing rails around the entire periphery, it is possible to obtain an advantage of improving work efficiency, reducing the number of workers, stabilizing welding quality, and provide a welding apparatus and a welding method for a square steel pipe that does not require skill of an operator. be able to.
【図１】本発明の一実施例である自動溶接装置の側面図
である。FIG. 1 is a side view of an automatic welding apparatus according to one embodiment of the present invention.
【図２】図１に示す自動溶接装置の正面図である。FIG. 2 is a front view of the automatic welding device shown in FIG.
【図３】被溶接物である角鋼管を突き合わせた状態を示
す斜視図である。FIG. 3 is a perspective view showing a state in which square steel pipes as welded objects are butted.
【図４】溶接台車及び走行台車が通過するレールを角鋼
管に固定した状態の右半分を示す平面図である。FIG. 4 is a plan view showing a right half of a state in which a rail through which a welding cart and a traveling cart pass is fixed to a square steel pipe.
【図５】（Ａ）〜（Ｃ）は角鋼管を溶接する手順を示す
平面図である。FIGS. 5A to 5C are plan views showing a procedure for welding a square steel pipe.
【図６】カスケード状とされたビードの端部を示す断面
図である。FIG. 6 is a cross-sectional view showing an end of a cascaded bead.
１０，１２ 角鋼管 １６ エレクションピース １８ レール ２０ 固定手段 ２２ ボルト ２４ セラミックタブ ２６ａ，２６ｂ，２６ｃ 溶接ビード ２７ 溶接ビードの端部 ３０ 溶接台車 ３２ ベアリング ３４ 走行台車 ３６ ジョイント ３８ ラック ４０ 歯車 ４２ 溶接トーチ ４４ 溶接ワイヤ 10, 12 square steel pipe 16 erection piece 18 rail 20 fixing means 22 bolt 24 ceramic tab 26a, 26b, 26c welding bead 27 end of welding bead 30 welding trolley 32 bearing 34 traveling trolley 36 joint 38 rack 40 gear 42 welding torch 44 welding Wire
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平６−182589（ＪＰ，Ａ) 特開 平５−318122（ＪＰ，Ａ) 特開 昭61−162266（ＪＰ，Ａ) 特開 昭62−24863（ＪＰ，Ａ) 特開 平４−351272（ＪＰ，Ａ) 特開 平４−89195（ＪＰ，Ａ) 実開 昭63−25261（ＪＰ，Ｕ) 特公 昭52−23607（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) B23K 9/12 B23K 9/00 B23K 9/028 B23K 9/127 B23K 37/02 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-182589 (JP, A) JP-A-5-318122 (JP, A) JP-A-61-162266 (JP, A) JP-A-62-162 24863 (JP, A) JP-A-4-351272 (JP, A) JP-A-4-89195 (JP, A) JP-A-63-25261 (JP, U) JP-B-52-23607 (JP, B2) (58) Field surveyed (Int.Cl. 7 , DB name) B23K 9/12 B23K 9/00 B23K 9/028 B23K 9/127 B23K 37/02
Claims (3)
の一方に装着され前記上下の角鋼管の接合部に沿って角
鋼管の周りを取り囲む閉鎖型レールと、 溶接トーチを搬送しながら前記閉鎖型レール上を移動す
る複数の台車と、 前記溶接トーチの動作及び前記台車の速度などを制御す
る制御装置と、 既に溶接されたビードに新たに溶接するビードをつなぐ
ときに、前記既に溶接されたビードの端部を検出する手
段とを備え、 仮止め手段で仮止めされた接合部を除いて前記接合部の
一部を自動的に溶接するとともに、仮止め手段を取り除
いた後で残りの接合部を自動的に溶接することを特徴と
する角鋼管の溶接装置。1. A closed type rail mounted on one of upper and lower square steel pipes butted against each other and surrounding a square steel pipe along a joint of the upper and lower square steel pipes, and the closed type rail while conveying a welding torch. A plurality of bogies moving on rails, a control device for controlling the operation of the welding torch, the speed of the bogie, and the like; when connecting a bead to be newly welded to a bead that has been already welded, the already welded bead Means for detecting the end of the joint, and automatically welds a part of the joint except for the joint temporarily fixed by the temporary fixing means, and removes the temporary joint after removing the temporary fixing means. Welding equipment for square steel pipes, which automatically welds steel pipes.
した角鋼管について、仮止めされた部分以外の接合部の
一部を所定のパス数よりも少ないパス数で第１の溶接作
業を行い、 前記仮止め手段を取り外し、 前記第１の溶接作業で溶接された接合部以外の接合部に
ついて、前記第１のパス数と同じパス数で第２の溶接作
業を行い、 前記第１の溶接作業及び第２の溶接作業がなされた接合
部の上において第１及び第２の溶接作業のパス数との合
計が前記所定のパス数となるだけのパス数で第３の溶接
作業を行う、 ことにより前記角鋼管の一周にわたって前記所定のパス
数による溶接を行うことを特徴とする角鋼管の溶接方
法。2. A first welding operation is performed on a part of a joint portion other than a temporarily fixed portion with a number of passes smaller than a predetermined number of passes with respect to a square steel pipe temporarily butted and temporarily fixed by a temporary fixing means. Removing the temporary fixing means, and performing a second welding operation with the same number of passes as the first number of passes on the joints other than the joints welded in the first welding operation; Performing a third welding operation on the joint where the operation and the second welding operation have been performed, with a number of passes such that the sum of the number of passes of the first and second welding operations becomes the predetermined number of passes; The welding method of the square steel pipe, wherein the welding is performed by the predetermined number of passes over one circumference of the square steel pipe.
て、 第１の溶接作業によって溶接されるビードの端部を所定
のパス数よりも少ないパス数でカスケード状とし、 第２の溶接作業によって溶接される前記残りのビードの
端部は前記第１の溶接作業のパス数と同じパス数で第１
の溶接作業によって溶接されたビードのカスケード状の
端部に重なるようにして溶接し、 前記第１の溶接作業及び第２の溶接作業がなされた接合
部の上において第１及び第２の溶接作業のパス数との合
計が前記所定のパス数となるだけのパス数で第３の溶接
作業を行う、 ことを特徴とする請求項２記載の角鋼管の溶接方法。3. The method according to claim 2, wherein the end of the bead to be welded by the first welding operation is cascaded with a smaller number of passes than a predetermined number of passes. The end of the remaining bead to be welded by the first number of passes is the same as the number of passes of the first welding operation.
Welding so as to overlap the cascaded end of the bead welded by the first welding operation and the first and second welding operations on the joint where the first welding operation and the second welding operation have been performed. The welding method for a square steel pipe according to claim 2, wherein the third welding operation is performed with a number of passes such that the sum of the number of passes and the predetermined number of passes is equal to the predetermined number of passes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4361330A JP3042570B2 (en) | 1992-12-28 | 1992-12-28 | Welding apparatus and welding method for square steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4361330A JP3042570B2 (en) | 1992-12-28 | 1992-12-28 | Welding apparatus and welding method for square steel pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06198442A JPH06198442A (en) | 1994-07-19 |
| JP3042570B2 true JP3042570B2 (en) | 2000-05-15 |
Family
ID=18473142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4361330A Expired - Lifetime JP3042570B2 (en) | 1992-12-28 | 1992-12-28 | Welding apparatus and welding method for square steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3042570B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4788094B2 (en) * | 2003-05-06 | 2011-10-05 | 株式会社日立製作所 | Automatic welding equipment |
| JP6378510B2 (en) * | 2014-03-19 | 2018-08-22 | 株式会社ダイヘン | Calculation device |
| JP6316896B2 (en) * | 2016-09-30 | 2018-04-25 | 大成建設株式会社 | Building steel pipe column welding method |
| JP6534483B1 (en) * | 2018-10-31 | 2019-06-26 | 日鉄エンジニアリング株式会社 | Steel beam welding method |
-
1992
- 1992-12-28 JP JP4361330A patent/JP3042570B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06198442A (en) | 1994-07-19 |
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