JP5326167B2 - Arc welding method and arc welding apparatus - Google Patents

Arc welding method and arc welding apparatus Download PDF

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JP5326167B2
JP5326167B2 JP2008324269A JP2008324269A JP5326167B2 JP 5326167 B2 JP5326167 B2 JP 5326167B2 JP 2008324269 A JP2008324269 A JP 2008324269A JP 2008324269 A JP2008324269 A JP 2008324269A JP 5326167 B2 JP5326167 B2 JP 5326167B2
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welding
welded
cylindrical body
tip
arc
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JP2010142851A (en
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大介 三浦
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Nippon Pop Rivets and Fasteners Ltd
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Nippon Pop Rivets and Fasteners Ltd
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Priority to JP2008324269A priority Critical patent/JP5326167B2/en
Priority to CN200980156913XA priority patent/CN102317022A/en
Priority to EP09833843.7A priority patent/EP2389267A4/en
Priority to PCT/US2009/068786 priority patent/WO2010071823A2/en
Publication of JP2010142851A publication Critical patent/JP2010142851A/en
Priority to US13/164,207 priority patent/US20110278275A1/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
    • B23K9/0008—Welding without shielding means against the influence of the surrounding atmosphere
    • 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
    • B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
    • B23K9/0043—Locally welding a thin plate to a thick piece
    • 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
    • B23K9/20—Stud welding
    • B23K9/201—Stud welding of the extremity of a small piece on a great or large basis
    • 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
    • B23K9/20—Stud welding
    • B23K9/205—Means for determining, controlling or regulating the arc interval
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/006—Vehicles

Description

本発明は、ブラケット等の溶接部材をパイプや平板等の被溶接部材に溶接するアーク溶接方法及びアーク溶接装置に関する。   The present invention relates to an arc welding method and an arc welding apparatus for welding a welding member such as a bracket to a member to be welded such as a pipe or a flat plate.

ブラケット等の溶接部材をパイプや平板等の被溶接部材に溶接するアーク溶接は、よく知られている。特許文献１には、被溶接部材としての自動車のボデーパネルに、ワイヤハーネスを固定するための、溶接部材としてのブラケットを溶接する溶接装置が記載されている。特許文献１に記載の溶接装置は、Ｌ字型のブラケットを保持できる溶接ヘッドを備えている。特許文献１に記載の溶接装置は、Ｌ字型のブラケットを保持できる溶接ヘッドを有するので、溶接部材としてのブラケットを、被溶接部材としてのボデーパネルの溶接位置に保持しておく必要がないようにしている。   Arc welding for welding a welding member such as a bracket to a member to be welded such as a pipe or flat plate is well known. Patent Literature 1 describes a welding apparatus for welding a bracket as a welding member for fixing a wire harness to a body panel of an automobile as a member to be welded. The welding apparatus described in Patent Document 1 includes a welding head that can hold an L-shaped bracket. Since the welding apparatus described in Patent Literature 1 has a welding head that can hold an L-shaped bracket, it is not necessary to hold the bracket as a welding member at the welding position of the body panel as a member to be welded. I have to.

特開平８−０１９８６５号公報Japanese Patent Laid-Open No. 8-019855 特開２００１−１０５１４２号公報JP 2001-105142 A

特許文献１に記載の溶接装置は、通常の公知の溶接装置と同様に、溶接熱が高いので、例えば、自動車のクロスメンバーの１つであるステハンビームにブラケットを溶接するとき、そのブラケット及びステハンビームを溶融する熱によって被溶接部材であるステハンビームに歪みが発生するおそれがある。特許文献２には、雌ねじを形成した中空のスタッドを被溶接部材に溶接する方法が記載されている。スタッドの溶接部となる端部は、鋭角状に突出した形状に形成されており、溶接時の熱的影響を小さくしようとしている。特許文献２に記載の溶接方法は、スタッドの溶接については被溶接部材に溶接する場合の熱的影響を減少しているが、ブラケット等を含む一般の溶接部材を、被溶接部材に溶接する場合の熱的影響を減少するものでない。   Since the welding apparatus described in Patent Document 1 has a high welding heat in the same manner as an ordinary well-known welding apparatus, for example, when a bracket is welded to a Stehan beam, which is one of automobile cross members, the bracket and Stehan There is a possibility that the Stehan beam, which is a member to be welded, may be distorted by heat that melts the beam. Patent Document 2 describes a method of welding a hollow stud formed with an internal thread to a member to be welded. The end part which becomes a welding part of a stud is formed in the shape which protruded in the acute angle shape, and is trying to make the thermal influence at the time of welding small. The welding method described in Patent Document 2 reduces the thermal influence when welding a stud to the welded member, but when welding a general welded member including a bracket or the like to the welded member. It does not reduce the thermal effects.

本発明の目的は、ブラケット等を含む一般の溶接部材を、被溶接部材に溶接する場合の熱的影響を減少することにあり、被溶接部材の過熱による変形を防止することにある。   An object of the present invention is to reduce a thermal influence when a general welding member including a bracket or the like is welded to a member to be welded, and to prevent deformation due to overheating of the member to be welded.

上記目的を達成するため、本発明に係る、アーク溶接装置を用いて溶接部材を被溶接部材に溶接するアーク溶接方法においては、前記溶接部材の溶接位置に、該溶接部材から突出する中空の筒状体が設けられており、該筒状体は、前記溶接部材から先端に向けて直径が増しており且つ先端において開放している中空の円錐形状に形成されており、前記アーク溶接装置の溶接ヘッドに保持された前記溶接部材の前記筒状体の前記開放先端が被溶接部材の溶接個所に接触するように位置決めされた状態で、前記アーク溶接装置が、前記被溶接部材を前記被溶接部材から引上げて前記筒状体の先端と前記被溶接部材との間に小電流のパイロットアークを生成した後に大電流のメインアークを生成させて該筒状体の先端と該被溶接部材の前記溶接位置の部分とを溶融し、前記アーク溶接装置が、前記溶接ヘッドに保持された前記溶接部材の前記筒状体先端を前記被溶接部材に押付けて該筒状体先端を前記被溶接部材に溶着させて該溶接部材を前記被溶接部材に溶接する、ことを特徴とする。   In order to achieve the above object, in an arc welding method for welding a welding member to a member to be welded using an arc welding apparatus according to the present invention, a hollow tube projecting from the welding member at a welding position of the welding member. The cylindrical body is formed in a hollow conical shape whose diameter increases from the welding member toward the tip and is open at the tip, and is welded to the arc welding apparatus. In a state where the open end of the tubular body of the welding member held by the head is positioned so as to contact a welding portion of the member to be welded, the arc welding apparatus moves the member to be welded to the member to be welded. After pulling up from the tip of the cylindrical body and the welded member, a small current pilot arc is generated, and then a large current main arc is generated to weld the tip of the cylindrical body and the welded member. position The arc welding apparatus presses the cylindrical body tip of the welding member held by the welding head against the member to be welded to weld the cylindrical body tip to the member to be welded. The welding member is welded to the member to be welded.

また、本発明に係る、溶接ヘッドに保持された溶接部材を被溶接部材にアーク溶接によって溶接するアーク溶接装置においては、前記溶接部材の溶接位置に、該溶接部材から突出する中空の筒状体が設けられており、該筒状体は、前記溶接部材から先端に向けて直径が増しており且つ先端において開放している中空の円錐形状に形成されており、当該アーク溶接装置は、前記溶接ヘッドに保持された前記溶接部材の前記筒状体の大径の開放先端が被溶接部材の溶接個所に接触するように位置決めされた状態で、前記被溶接部材を前記被溶接部材から引上げて前記筒状体の先端と前記被溶接部材との間に小電流のパイロットアークを生成した後に大電流のメインアークを生成させて該筒状体の先端と該被溶接部材の前記溶接位置の部分とを溶融し、前記溶接ヘッドに保持された前記溶接部材の前記筒状体先端を前記被溶接部材に押付けて該筒状体先端を前記被溶接部材に溶着させて該溶接部材を前記被溶接部材に溶接する、ように動作する、ことを特徴とする。   In the arc welding apparatus according to the present invention for welding a welding member held by a welding head to a member to be welded by arc welding, a hollow cylindrical body protruding from the welding member at a welding position of the welding member. The cylindrical body is formed in a hollow conical shape having a diameter that increases from the welding member toward the tip and is open at the tip. In a state where the large-diameter open end of the tubular body of the welding member held by the head is positioned so as to come into contact with the welding portion of the welded member, the welded member is pulled up from the welded member and the A small current pilot arc is generated between the tip of the cylindrical body and the member to be welded, and then a main arc of a large current is generated so that the tip of the cylindrical body and the portion of the welding position of the member to be welded are Melt The cylindrical body tip of the welding member held by the welding head is pressed against the member to be welded, the cylindrical body tip is welded to the member to be welded, and the welding member is welded to the member to be welded. It operates as follows.

上記のアーク溶接方法及びアーク溶接装置によれば、溶接部材の溶接位置に、溶接部材から突出する中空の筒状体が設けられ、筒状体は、溶接部材から先端に向けて直径が増しており且つ先端において開放している中空の円錐形状に形成されているので、筒状体の溶接可能温度への溶融の時間が短くなり、これによって、溶接時間が極めて短くでき、被溶接部材への熱的影響を減少でき、従って、被溶接部材の過熱による変形又は歪みを防止でき、被溶接部材が薄肉の材料であっても変形のない適正な溶接を行える。そして、溶接時間が短いので省エネルギー化が可能になり、更に、溶接部材を被溶接部材に溶接する部分の筒状体は中空の円錐形のため、生成された溶接アークが円錐内部を回転しながら移動して溶融し、被溶接部材の形状に因る磁力線の影響を受けにくくなり、溶接アークの偏りによる溶接部強度低下を防げる。   According to the above arc welding method and arc welding apparatus, a hollow cylindrical body protruding from the welding member is provided at the welding position of the welding member, and the cylindrical body has a diameter increasing from the welding member toward the tip. Since it is formed in a hollow conical shape that is open at the tip, the time for melting the cylindrical body to the weldable temperature is shortened, and this makes it possible to shorten the welding time extremely, The thermal influence can be reduced, and therefore deformation or distortion due to overheating of the member to be welded can be prevented, and proper welding without deformation can be performed even if the member to be welded is a thin material. And since the welding time is short, energy saving is possible. Furthermore, since the cylindrical body of the portion where the welding member is welded to the member to be welded is a hollow conical shape, the generated welding arc rotates inside the cone. It moves and melts and is less susceptible to the influence of magnetic lines of force due to the shape of the member to be welded, and prevents a decrease in weld strength due to the bias of the welding arc.

上記アーク溶接装置において、前記筒状体の開放先端における開き角度は、該筒状体の軸線方向の直線に対して、５度〜８０度であるのが好ましい。また、前記筒状体の開放先端における直径は、５ｍｍ〜２５ｍｍであるのが好ましい。更に、前記溶接部材から前記先端までの前記筒状体の長さが、５ｍｍ〜５０ｍｍであるのが好ましい。なお、前記被溶接部材は、代表的には、パイプ又は平板である。そして、前記溶接部材は、代表的には、他の部品を取付けるのに利用できるブラケットである。   In the arc welding apparatus, the opening angle at the open end of the cylindrical body is preferably 5 to 80 degrees with respect to a straight line in the axial direction of the cylindrical body. Moreover, it is preferable that the diameter in the open front-end | tip of the said cylindrical body is 5 mm-25 mm. Furthermore, it is preferable that the length of the cylindrical body from the welding member to the tip is 5 mm to 50 mm. The member to be welded is typically a pipe or a flat plate. The welding member is typically a bracket that can be used to attach other parts.

以下、本発明の１実施形態に係るアーク溶接装置１について、図面を参照しながら説明する。図１の（Ａ）には、アーク溶接装置１が示されている。図１の（Ｂ）及び（Ｃ）には、アーク溶接装置１の溶接動作を示されている。図２は、溶接部材であるブラケット２を示している。図３は、ブラケット２が溶接された、被溶接部材であるパイプ３を示している。図４は、溶接部材であるブラケット２の縦断面図であり、ブラケット２に設けられた筒状体５の好ましい寸法、開放角度等を示している。図５は、ブラケット２の筒状体５が溶接されるときのアークのふるまいを示している。   Hereinafter, an arc welding apparatus 1 according to an embodiment of the present invention will be described with reference to the drawings. In FIG. 1A, an arc welding apparatus 1 is shown. 1B and 1C show the welding operation of the arc welding apparatus 1. FIG. 2 shows a bracket 2 which is a welding member. FIG. 3 shows a pipe 3 as a member to be welded, to which the bracket 2 is welded. FIG. 4 is a longitudinal sectional view of the bracket 2 that is a welding member, and shows preferable dimensions, an opening angle, and the like of the cylindrical body 5 provided on the bracket 2. FIG. 5 shows the behavior of the arc when the tubular body 5 of the bracket 2 is welded.

図１（Ａ）に示すアーク溶接装置１は、溶接部材であるブラケット２を保持する溶接ヘッド６を有する。アーク溶接装置１は、溶接ヘッド６に保持されたブラケット２と被溶接部材であるパイプ３とに所定の電力を与えてアークを生成して、ブラケット２をパイプ３に溶接する。この溶接のため、アーク溶接装置１には、電源７と、その動作を制御するコントローラ９とが備えられている。ブラケット２とパイプ３とに溶接のための所定の電力を供給するため、電線１０Ａ及び１０Ｂがアーク溶接装置１のコントローラ９からブラケット２とパイプ３とに接続されている。   An arc welding apparatus 1 shown in FIG. 1A has a welding head 6 that holds a bracket 2 that is a welding member. The arc welding apparatus 1 applies predetermined power to the bracket 2 held by the welding head 6 and the pipe 3 that is a member to be welded to generate an arc, and welds the bracket 2 to the pipe 3. For this welding, the arc welding apparatus 1 is provided with a power source 7 and a controller 9 for controlling the operation thereof. Electric wires 10 </ b> A and 10 </ b> B are connected to the bracket 2 and the pipe 3 from the controller 9 of the arc welding apparatus 1 in order to supply predetermined power for welding to the bracket 2 and the pipe 3.

図１（Ａ）において、アーク溶接装置１の溶接ヘッド６は、その溶接ヘッド６に保持されたブラケット２（溶接部材）の筒状体５の大径の開放先端がパイプ３（被溶接部材）の溶接個所に接触できるように位置決めされる。   In FIG. 1A, a welding head 6 of an arc welding apparatus 1 has a pipe 3 (a member to be welded) having a large diameter open tip of a cylindrical body 5 of a bracket 2 (welding member) held by the welding head 6. It is positioned so that it can contact the welding point of.

図１（Ｂ）において、アーク溶接装置１の溶接ヘッド６は、先ず、その溶接ヘッド６に保持されたブラケット２の筒状体５の大径の開放先端を、パイプ３の所定の溶接個所に接触させる。この溶接ヘッド６の動作は、アーク溶接装置１のコントローラ９が制御する。コントローラ９は、次に、ブラケット２を筒状体５とともにパイプ３から所定高さ引上げて、筒状体５の先端とパイプ３の溶接個所との間に小電流のパイロットアークを生成させる。パイロットアークの生成の後に、大電流のメインアークを生成させて、筒状体５の先端とパイプ３の溶接位置の部分とを溶融する。   In FIG. 1 (B), the welding head 6 of the arc welding apparatus 1 first places the large-diameter open tip of the cylindrical body 5 of the bracket 2 held by the welding head 6 at a predetermined welding location of the pipe 3. Make contact. The operation of the welding head 6 is controlled by the controller 9 of the arc welding apparatus 1. Next, the controller 9 raises the bracket 2 together with the tubular body 5 from the pipe 3 to a predetermined height, and generates a small current pilot arc between the tip of the tubular body 5 and the welded portion of the pipe 3. After the generation of the pilot arc, a high-current main arc is generated, and the tip of the cylindrical body 5 and the welded portion of the pipe 3 are melted.

図１（Ｃ）において、コントローラ９は、溶接ヘッド６に保持されたブラケット２の筒状体５の先端とパイプ３の溶接位置の部分とが適正に溶融されたのを時間的にあるいはセンサによって検知して、溶融された筒状体５の先端をパイプ３の溶接位置の部分に押付けて、筒状体５の先端をパイプ３に溶着させる。これによって溶接部材としてのブラケット２が被溶接部材としてのパイプ３に溶接される。   In FIG. 1C, the controller 9 determines whether the tip of the cylindrical body 5 of the bracket 2 held by the welding head 6 and the welded portion of the pipe 3 are properly melted in time or by a sensor. The tip of the melted cylindrical body 5 is pressed against the welded portion of the pipe 3 to weld the tip of the tubular body 5 to the pipe 3. As a result, the bracket 2 as a welding member is welded to the pipe 3 as a member to be welded.

図２に図示のように、溶接部材としてのブラケット２には、その溶接位置に、ブラケット２から突出する中空の筒状体５が一体に設けられている。筒状体５は、ブラケット２から先端に向けて直径が増しており且つ先端において開放している中空の円錐形状に形成されている。ブラケット２及び筒状体５は導電性材料で形成される。好ましくは、ブラケット２及び筒状体５は同じ導電性材料で一体成形される。例えば、導電性金属を板金加工することによって成形することができる。   As shown in FIG. 2, the bracket 2 as a welding member is integrally provided with a hollow cylindrical body 5 protruding from the bracket 2 at the welding position. The cylindrical body 5 is formed in a hollow conical shape whose diameter increases from the bracket 2 toward the tip and is open at the tip. The bracket 2 and the cylindrical body 5 are made of a conductive material. Preferably, the bracket 2 and the cylindrical body 5 are integrally formed of the same conductive material. For example, it can be formed by subjecting a conductive metal to sheet metal processing.

図３に図示のように、被溶接部材としてのパイプ３には、アーク溶接装置１によって、図１（Ａ）〜（Ｃ）に示される動作によって、溶接部材としてのブラケット２が筒状体５を用いて溶接される。   As shown in FIG. 3, a bracket 2 as a welding member is attached to a pipe 5 as a member to be welded by the arc welding apparatus 1 by the operation shown in FIGS. 1 (A) to (C). It is welded using.

筒状体５の詳細について、図４を参照して説明する。筒状体５は、上記のように、溶接部材としてブラケット２の溶接位置に、ブラケット２から突出する中空の筒状体として、ブラケットに一体に形成されている。筒状体５は、ブラケット２の平面から開放先端１０に向けて直径が増すように中空の円錐形状に形成されている。筒状体５の円錐形状は、必ずしも、真正の円錐形状でなくてもよく、図示のように、ブラケット２に近い部分では円筒形状に形成され、中間高さの部分から円錐に形成されたものでも、あるいは、円錐台形状であってもよく、開放先端１０を含む先端側の部分において円錐形状を有する形状であればよい。また、筒状体５の先端１０は、開放している。実験において、筒状体５は、ブラケット２の所定部分を、プレスによってバーリング成形し、このバーリング成形によって突出した部分を、更に円錐形状に成形することによって、形成された。   The detail of the cylindrical body 5 is demonstrated with reference to FIG. As described above, the cylindrical body 5 is integrally formed with the bracket as a hollow cylindrical body protruding from the bracket 2 at the welding position of the bracket 2 as a welding member. The cylindrical body 5 is formed in a hollow conical shape so that its diameter increases from the plane of the bracket 2 toward the open tip 10. The conical shape of the cylindrical body 5 does not necessarily have to be a true conical shape. As shown in the drawing, the conical shape is formed in a cylindrical shape near the bracket 2 and is formed in a conical shape from the intermediate height portion. However, it may be in the shape of a truncated cone, as long as it has a conical shape at the tip side including the open tip 10. Moreover, the front-end | tip 10 of the cylindrical body 5 is open | released. In the experiment, the cylindrical body 5 was formed by burring a predetermined portion of the bracket 2 with a press, and further molding the protruding portion into a conical shape.

筒状体５の具体的な寸法及び角度について、種々の実験の結果、次のようなデータを得た。筒状体５の開放先端１０における開き角度１１は、筒状体５の軸線１３と同じ方向に延びる平行な直線１４（筒状体５の根元の円筒部分に沿って延びる接線１４）に対して、最小角度１５が５度であり、最大角度１７が８０度であり、この開き角度１１の範囲で好ましい溶接結果を得た。また、筒状体５の開放先端１０における直径１８が５ｍｍ〜２５ｍｍである場合に、好ましい溶接結果を得た。更に、溶接部材としてのブラケット２の平面から開放先端１０までの筒状体５の長さ１９は、筒状体の加工の点を考慮して５ｍｍ〜５０ｍｍとしたが、この場合において、好ましい溶接結果を得た。   As a result of various experiments, the following data was obtained regarding specific dimensions and angles of the cylindrical body 5. The opening angle 11 at the open tip 10 of the cylindrical body 5 is relative to a parallel straight line 14 extending in the same direction as the axis 13 of the cylindrical body 5 (tangent line 14 extending along the base cylindrical portion of the cylindrical body 5). The minimum angle 15 is 5 degrees, the maximum angle 17 is 80 degrees, and preferable welding results were obtained in the range of the opening angle 11. Moreover, when the diameter 18 at the open end 10 of the cylindrical body 5 is 5 mm to 25 mm, a preferable welding result was obtained. Further, the length 19 of the cylindrical body 5 from the plane of the bracket 2 as the welding member to the open tip 10 is set to 5 mm to 50 mm in consideration of processing of the cylindrical body. In this case, preferable welding is performed. The result was obtained.

図５には、ブラケット２の筒状体５がパイプ３に溶接されるときに生成されるアークのふるまいが示されている。アークは、矢印２１及び２２に示すように、筒状体５の開放先端１０において円錐内部を周方向に移動しながら生成されていくのが観測された。これによって、筒状体５の開放先端１０の溶融時間（すなわちメインアークの生成時間）が少なくても、その開放先端１０の部分は、十分な溶融状態となり、従って、メインアークの生成を停止して筒状体５の開放先端１０をパイプ３の所定個所の押付ければ、開放先端１０がパイプ３に適正に溶着されて、ブラケット２がパイプ３に溶接される。従って、溶接時間が極めて短くでき、被溶接部材としてのパイプへの熱的影響を減少でき、パイプ等の被溶接部材の過熱による変形又は歪みを防止でき、被溶接部材が薄肉の材料であっても変形のない適正な溶接を行える。溶接時間が短いので省エネルギー化が可能になり、アークが円錐内部を回転しながら移動するので、被溶接部材の形状に因る磁力線の影響を受けにくくなり、溶接アークの偏りによる溶接部強度低下を防げる。   FIG. 5 shows the behavior of the arc generated when the cylindrical body 5 of the bracket 2 is welded to the pipe 3. As indicated by arrows 21 and 22, it was observed that the arc was generated while moving inside the cone in the circumferential direction at the open tip 10 of the cylindrical body 5. Thereby, even if the melting time of the open tip 10 of the cylindrical body 5 (that is, the generation time of the main arc) is short, the portion of the open tip 10 is in a sufficiently melted state, and therefore the generation of the main arc is stopped. If the open tip 10 of the cylindrical body 5 is pressed at a predetermined location of the pipe 3, the open tip 10 is properly welded to the pipe 3 and the bracket 2 is welded to the pipe 3. Therefore, the welding time can be extremely shortened, the thermal influence on the pipe as the welded member can be reduced, the deformation or distortion due to overheating of the welded member such as a pipe can be prevented, and the welded member is a thin material. Can be properly welded without deformation. Because the welding time is short, energy saving is possible, and the arc moves while rotating inside the cone. I can prevent it.

上記のように、溶接部材を被溶接部材に溶接するために、溶接部材に設けられた円錐形状の筒状体を被溶接部材にしており、これによって、溶接時間が短くなり、被溶接部材への熱影響が少なくてすみ、薄板へに小さなエネルギーで溶接するのが可能になり、また、溶接面積が多くなり強度が高く安定した溶接が可能になる。なお、被溶接部材は、代表的には、上記のパイプの外に平板であってもよい。溶接部材としては、上記のように、他の部品を取付けるのに利用できるブラケットが代表的であるが、他の部材であってもよい。   As described above, in order to weld the welding member to the member to be welded, the conical cylindrical body provided on the welding member is used as the member to be welded. Therefore, it is possible to weld to a thin plate with a small amount of energy, and the welding area is increased and the strength is high and stable welding is possible. The member to be welded may typically be a flat plate outside the pipe. As the welding member, as described above, a bracket that can be used for mounting other components is typical, but other members may be used.

本発明の１実施形態に係るアーク溶接装置の構成及びその溶接動作を示しており、（Ａ）は、アーク溶接装置の構成とブラケットをパイプを位置決めした状態を示す図であり、（Ｂ）は、便宜上、アーク溶接装置を除いた状態で、ブラケットの筒状体とパイプの間でアークを生成した状態を示す図であり、（Ｃ）は、便宜上アーク溶接装置を除いた状態で、ブラケットをその筒状体を介してパイプに溶接した状態を示す図である。The structure of the arc welding apparatus which concerns on one Embodiment of this invention, and its welding operation are shown, (A) is a figure which shows the state which positioned the pipe and the structure of the arc welding apparatus, and a bracket, (B) FIG. 4 is a view showing a state in which an arc is generated between the cylindrical body of the bracket and the pipe without the arc welding device for convenience, and FIG. It is a figure which shows the state welded to the pipe via the cylindrical body. 筒状体を有するブラケットの斜視図である。It is a perspective view of the bracket which has a cylindrical body. 筒状体を介してブラケットをパイプに溶接した状態を示す斜視図である。It is a perspective view which shows the state which welded the bracket to the pipe via the cylindrical body. ブラケットの筒状体を示すブラケットの断面図である。It is sectional drawing of the bracket which shows the cylindrical body of a bracket. ブラケットの筒状体における生成アークのふるまいを示す図である。It is a figure which shows the behavior of the production | generation arc in the cylindrical body of a bracket.

符号の説明Explanation of symbols

１ アーク溶接装置
２ ブラケット（溶接部材）
３ パイプ（被溶接部材）
５ 筒状体
６ 溶接ヘッド
７ 電源
９ コントローラ
１０ 筒状体の開放先端
１１ 開き角度
１３ 軸線
１４ 直線
１５ 最小角度
１７ 最大角度
１８ 直径
１９ 長さ 1 Arc welding equipment 2 Bracket (welding member)
3 Pipe (member to be welded)
5 Tubular body 6 Welding head 7 Power source 9 Controller 10 Open end 11 of tubular body Opening angle 13 Axis 14 Straight line 15 Minimum angle 17 Maximum angle 18 Diameter 19 Length

Claims (7)

アーク溶接装置を用いて、他の部品を取付けるのに利用できるブラケットである溶接部材を被溶接部材に溶接するアーク溶接方法であって、
前記溶接部材には、その溶接位置に、該溶接部材から突出する中空の筒状体が設けられており、該筒状体は、前記溶接部材から先端に向けて直径が増しており且つ先端において開放している中空の円錐形状に形成され、前記ブラケットと前記筒状体とは同じ導電性材料で一体成形されており、
前記アーク溶接装置の溶接ヘッドに保持された前記溶接部材の前記筒状体の前記開放先端が被溶接部材の溶接個所に接触するように位置決めされた状態で、前記アーク溶接装置が、前記溶接部材を前記被溶接部材から引上げて前記筒状体の先端と前記被溶接部材との間に小電流のパイロットアークを生成した後に大電流のメインアークを生成させて該筒状体の先端と該被溶接部材の前記溶接位置の部分とを溶融し、
前記アーク溶接装置が、前記溶接ヘッドに保持された前記溶接部材の前記筒状体先端を前記被溶接部材に押付けて該筒状体先端を前記被溶接部材に溶着させて該溶接部材を前記被溶接部材に溶接する、
ことを特徴とする方法。 An arc welding method for welding a welded member, which is a bracket that can be used to attach other parts, to an object to be welded using an arc welding apparatus,
The welding member is provided with a hollow cylindrical body protruding from the welding member at the welding position, and the cylindrical body has a diameter increasing from the welding member toward the tip, and at the tip. It is formed in an open hollow conical shape, and the bracket and the cylindrical body are integrally formed of the same conductive material,
In a state where the open end of the tubular body of the welding member held by the welding head of the arc welding apparatus is positioned so as to contact a welding location of the member to be welded, the arc welding apparatus includes the welding member Is pulled up from the member to be welded to generate a pilot arc of a small current between the tip of the cylindrical body and the member to be welded, and then a main arc of a large current is generated to generate a tip of the cylindrical body and the workpiece. Melting the portion of the welding position of the welding member;
The arc welding apparatus presses the end of the tubular body of the welding member held by the welding head against the member to be welded, welds the end of the tubular body to the member to be welded, and attaches the welding member to the section to be welded. Welding to welded parts,
A method characterized by that. 溶接ヘッドに保持され、他の部品を取付けるのに利用できるブラケットである溶接部材を被溶接部材にアーク溶接によって溶接するアーク溶接装置であって、
前記溶接部材には、その溶接位置に、該溶接部材から突出する中空の筒状体が設けられており、該筒状体は、前記溶接部材から先端に向けて直径が増しており且つ先端において開放している中空の円錐形状に形成されて、前記ブラケットと前記筒状体とは同じ導電性材料で一体成形されており、
当該アーク溶接装置は、前記溶接ヘッドに保持された前記溶接部材の前記筒状体の大径の開放先端が被溶接部材の溶接個所に接触するように位置決めされた状態で、前記溶接部材を前記被溶接部材から引上げて前記筒状体の先端と前記被溶接部材との間に小電流のパイロットアークを生成した後に大電流のメインアークを生成させて該筒状体の先端と該被溶接部材の前記溶接位置の部分とを溶融し、前記溶接ヘッドに保持された前記溶接部材の前記筒状体先端を前記被溶接部材に押付けて該筒状体先端を前記被溶接部材に溶着させて該溶接部材を前記被溶接部材に溶接する、ように動作する
ことを特徴とする装置。 An arc welding apparatus for welding a welding member, which is a bracket held by a welding head and can be used to attach other parts, to a member to be welded by arc welding,
The welding member is provided with a hollow cylindrical body protruding from the welding member at the welding position, and the cylindrical body has a diameter increasing from the welding member toward the tip, and at the tip. It is formed in an open hollow conical shape, and the bracket and the cylindrical body are integrally formed of the same conductive material,
In the arc welding apparatus, the welding member is positioned in such a manner that a large-diameter open end of the tubular body of the welding member held by the welding head is in contact with a welding portion of the member to be welded. Pulling up from the member to be welded to generate a small current pilot arc between the tip of the cylindrical body and the member to be welded, and then generating a main arc of a large current to generate the tip of the cylindrical body and the member to be welded A portion of the welding position of the welding member is melted, and the tip of the tubular body of the welding member held by the welding head is pressed against the member to be welded to weld the tip of the tubular body to the member to be welded An apparatus that operates to weld a welding member to the member to be welded. 請求項２に記載の装置において、前記筒状体は、前記ブラケットの所定部分を、プレスによってバーリング成形し、該バーリング成形によって突出した部分を、更に円錐形状に成形することによって、形成された、ことを特徴とする装置。3. The apparatus according to claim 2, wherein the cylindrical body is formed by burring a predetermined portion of the bracket with a press, and further molding a portion protruding by the burring into a conical shape. A device characterized by that. 請求項２又は３に記載の装置において、前記筒状体の開放先端における開き角度は、該筒状体の軸線方向の直線に対して、５度〜８０度である、ことを特徴とする装置。 The apparatus according to claim 2 or 3 , wherein an opening angle at an open tip of the cylindrical body is 5 degrees to 80 degrees with respect to a straight line in an axial direction of the cylindrical body. . 請求項２〜４のいずれか１項に記載の装置において、前記筒状体の開放先端における直径は、５ｍｍ〜２５ｍｍである、ことを特徴とする装置。 The apparatus according to any one of claims 2 to 4 , wherein a diameter of the cylindrical body at an open tip is 5 mm to 25 mm. 請求項２〜５のいずれか１項に記載の装置において、前記溶接部材から前記先端までの前記筒状体の長さが、５ｍｍ〜５０ｍｍである、ことを特徴とする装置。 The apparatus according to any one of claims 2 to 5 , wherein a length of the cylindrical body from the welding member to the tip is 5 mm to 50 mm. 請求項２〜６のいずれか１項に記載の装置において、前記被溶接部材は、パイプ又は平板である、ことを特徴とする装置。 Device according to any one of claims 2-6, wherein the member to be welded is a pipe or flat, and wherein the.
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