JP2004148355A - Method and device for arc welding stud and the like - Google Patents

Method and device for arc welding stud and the like Download PDF

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Publication number
JP2004148355A
JP2004148355A JP2002316109A JP2002316109A JP2004148355A JP 2004148355 A JP2004148355 A JP 2004148355A JP 2002316109 A JP2002316109 A JP 2002316109A JP 2002316109 A JP2002316109 A JP 2002316109A JP 2004148355 A JP2004148355 A JP 2004148355A
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Japan
Prior art keywords
welding
magnetic field
arc
head
base material
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JP2002316109A
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Japanese (ja)
Inventor
Eiji Nakagami
英治 中神
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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 JP2002316109A priority Critical patent/JP2004148355A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a welding device and a welding method, wherein the arc welding that forms a magnetic-field reducing the deviation of a welding arc is conducted requiring no power source for supplying a magnetic-field generating current other than a welding power source and requiring no control part for synchronizing the generation of magnetic-field with arc discharge. <P>SOLUTION: In a welding device 1 for a stud and the like, a magnetic field forming coil 11, which forms the magnetic field that reduces the deviation of the welding arc in a welding part when generating the welding arc, is disposed adjacent to a welding head 3 in the welding part of a base material 7. The magnetic field forming coil 11, which is disposed in the welding part, is connected in series to the electrical wire 10 for the base material, which is connected from a welding power source part 2 in the welding device 1 to the base material 7, The welding power source part 2 is also used as the power source for supplying a magnetic field generating current, and the generation of the magnetic-field is synchronized with the arc discharge. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、金属製のスタッド、ナット又は管状部材等の溶着部材を溶接ヘッドに保持して溶接部において母材にアーク溶接するスタッド等の溶接に関し、詳細には、スタッド等の溶着部材をアーク溶接するため、溶接アーク発生時に溶接アークの偏りを減少する磁界を形成する磁界形成コイルを溶接部に有する、スタッド等の溶接装置及び方法に関する。
【０００２】
【従来の技術】
金属製のスタッド、ナット又は管状部材等の溶着部材を溶接ヘッドに保持して溶接部において母材にアーク溶接するため、溶接アーク発生時に溶接アークの偏りを減少する磁界を溶接部に形成する、スタッド等の溶接装置は知られている。特開平１−１９７０７２号公報（特許文献１）、特開平７−１９５１７６号公報（特許文献２）、特開平７−２５１２７０号公報（特許文献３）及び特開平１０−１２８５４３号公報（特許文献４）を参照されたい。これらの特許文献１〜４には、溶接部において磁界を形成する磁界形成コイルを設け、磁界によって溶接アークの偏りを減少して溶接アークを一様にし、安定した溶接を得る技術が開示されている。
【０００３】
【特許文献１】
特開平１−１９７０７２号公報
【特許文献２】
特開平７−１９５１７６号公報
【特許文献３】
特開平７−２５１２７０号公報
【特許文献４】
特開平１０−１２８５４３号公報
【０００４】
【発明が解決しようとする課題】
上記の特開平１−１９７０７２号公報（特許文献１）、特開平７−１９５１７６号公報（特許文献２）、特開平７−２５１２７０号公報（特許文献３）及び特開平１０−１２８５４３号公報（特許文献４）に記載の溶接装置では、磁界を発生するコイルに磁界発生電流を供給するための電源を溶接電源とは別に必要としており、更に、磁界発生電流の生成をアーク放電と同期するように制御するための制御部も必要とする。
【０００５】
従って、本発明の目的は、溶接アーク発生時に溶接アークの偏りを減少する磁界を形成するアーク溶接において、溶接電源とは別の磁界発生電流供給用電源を不要にするとともに、磁界発生をアーク放電と同期させるための制御部も不要にする、スタッド等の溶接装置及び方法を提供することにある。
【０００６】
【課題を解決するための手段】
かかる目的を達成するため、本発明は、金属製のスタッド、ナット又は管状部材等の溶着部材を溶接部において母材にアーク溶接するため、溶接アーク発生時に溶接部における溶接アークの偏りを減少する磁界を形成する磁界形成コイルを溶接部に有するスタッド等の溶接装置であって、溶接部の磁界形成コイルは、溶接装置の溶接電源部から母材に接続される母材用電線の途中に直列に接続されていることを特徴とする溶接装置を提供する。これによって、溶接電源が磁界発生電流供給用電源として用いられるので、溶接電源とは別の磁界発生電流供給用電源を不要にするとともに、磁界の発生はアーク放電にそのまま同期するので同期のための制御部も不要になる。
上記溶接装置において、母材用電線は、溶接電源部から母材に直接接続される第１母材用電線と、溶接電源部から溶接部の磁界形成コイルを経由して母材に接続される第２母材用電線とから成るようにしてもよい。
【０００７】
本発明は、スタッド等の溶着部材を溶接部において母材にアーク溶接するスタッド等の溶接方法であって、溶接装置の溶接電源部から母材に接続された母材用電線を溶接部においてコイル形状に形成するステップを含み、溶接アーク発生時に溶接アークの偏りを減少する磁界を形成する磁界形成コイルを溶接電源部と前記母材との間に直列に設けることを特徴とする溶接方法が提供される。これによっても、溶接電源とは別の磁界発生電流供給用電源が不要になり、磁界の発生をアーク放電に同期させるための制御部も不要になる。
【０００８】
本発明は、スタッド等の溶着部材を溶接ヘッドに保持して溶接部において母材にアーク溶接するため、溶接アーク発生時に溶接部における溶接アークの偏りを減少する磁界を形成する磁界形成コイルを溶接部に有する、スタッド等の溶接装置であって、溶接部の磁界形成コイルは、溶接装置の溶接電源部から溶接ヘッドに接続されるヘッド用電線の途中に直列に接続されていることを特徴とする溶接装置を提供する。これによっても、溶接電源とは別の磁界発生電流供給用電源が不要になり、磁界の発生をアーク放電に同期させるための制御部も不要になる。
上記溶接装置において、ヘッド用電線は、溶接電源部から溶接ヘッドに直接接続される第１ヘッド用電線と、溶接電源部から溶接部の磁界形成コイルを経由して溶接ヘッドに接続される第２ヘッド用電線とを包含してもよい。
【０００９】
本発明は、スタッド等の溶着部材を溶接ヘッドに保持して溶接部において母材にアーク溶接するスタッド等の溶接方法であって、溶接装置の溶接電源部から溶接ヘッドに接続されたヘッド用電線を溶接部においてコイル形状に形成するステップを含み、溶接アーク発生時に溶接アークの偏りを減少する磁界を形成する磁界形成コイルを溶接電源部と溶接ヘッドとの間に直列に設けることを特徴とする溶接方法を提供する。これによっても、溶接電源とは別の磁界発生電流供給用電源が不要になり、磁界の発生をアーク放電に同期させるための制御部も不要になる。
【００１０】
【発明の実施の形態】
以下、本発明の実施例について図面を参照しながら説明する。図１は、本発明の第１実施例に係る溶接装置を示している。実施例における溶接装置はスタッドボルトやＴスタッド等の金属製スタッドを金属パネル等の母材に溶接するスタッド溶接装置を用いているが、金属製ナットや管状部材等の他の溶着部材をアーク溶接する溶接装置であってもよい。また、実施例におけるスタッド溶接装置は、パイロットアークと呼ばれる小さなアークを先に生成し、そのパイロットアークによってアーク溶接のためのメインアークを引出す、いわゆるドローンアーク式スタッド溶接装置である。図１において、スタッド溶接装置１は、溶接電源部２と溶接ヘッド３を包含する。溶接電源部２は、本体ハウジング５の中に収容されている。溶接ヘッド３には、スタッドボルト等の溶着部材としてのスタッド６が保持され、母材７の所定の溶接部に溶着される。溶接ヘッド３と母材７には、溶接電源部２からアーク放電のために電線又は電源ケーブル（本願において、電源ケーブルも含めて電線と呼ぶ）が接続される。溶接電源部２と溶接ヘッド３を接続するのはヘッド用電線９であり、溶接電源部２と母材７を接続するのは母材用電線１０である。
【００１１】
第１実施例において、溶接ヘッド３のスタッド６が位置決めされる溶接部の位置に、母材用電線１０の途中に磁界形成コイル１１が母材用電線１０に直列に接続されている。磁界形成コイル１１は、特開平１−１９７０７２号公報（特許文献１）、特開平７−１９５１７６号公報（特許文献２）、特開平７−２５１２７０号公報（特許文献３）、特開平１０−１２８５４３号公報（特許文献４）等に示されるように、溶接部において磁界を形成し、その磁界によって溶接アークの偏りを減少して溶接アークを一様にし、安定した溶接を得るものである。この磁界形成コイル１１は、１つのやり方では、溶接電源部２から母材７に接続される母材用電線１０の一部を溶接部においてコイル形状に巻回することによって得ることができる。別のやり方では、磁界形成コイル１１を母材用電線１０とは別に作っておき、その磁界形成コイル１１を溶接部に配置して母材用電線１０の途中に直列に接続してもよい。いずれのやり方でも、溶接電源部２から母材７に接続された母材用電線１０を溶接部においてコイル形状にした磁界形成コイル１１とすることができる。このように、磁界形成コイル１１が母材用電線１０に直列に接続されるので、溶接アークを生成するための電流が磁界形成コイル１１に溶接アークの生成に同期して流れるので、溶接電源とは別の磁界発生電流供給用電源を不要にするだけでなく、磁界の発生はアーク放電にそのまま同期するので同期のための制御部も不要になる。
【００１２】
図２は、本発明の第２の実施例を示している。この実施例は、図１の第１実施例とほぼ同じであるが、母材用電線が、溶接電源部２から母材７に直接接続される第１母材用電線１３と、溶接電源部２から溶接部の磁界形成コイル１１を経由して母材７に接続される第２母材用電線１４とから成る点で違っている。磁界形成コイル１１の形成のやり方は、第１実施例と同じようにできる。また、磁界形成コイル１１は、溶接部において磁界を形成して溶接アークの偏りを減少し、安定した溶接を得る。従って、第２母材用電線１４の磁界形成コイル１１には、溶接アークの生成に同期して電流が流れるので、溶接電源とは別の磁界発生電流供給用電源を不要にするだけでなく、磁界の発生はアーク放電にそのまま同期するので同期のための制御部も不要になる。この第２実施例は、従来の溶接電源部２から母材７へ電流を供給する第１母材用電線１３を持つ従来の溶接装置に、磁界形成コイル１１とその両端子に第２母材用電線１４が設けられたものを、溶接電源部２と母材７との間に付加してコイル１１を溶接部に配置したものである。すなわち、この実施例では、従来の溶接装置への改変を最小限にできる。
【００１３】
図３は、本発明の第３の実施例を示している。図３において、第１実施例と同様に、スタッド溶接装置１は、本体ハウジング５に収容された溶接電源部２と母材７の溶接部においてスタッド６を保持して溶接する溶接ヘッド３を包含する。溶接電源部２と溶接ヘッド３を接続するのはヘッド用電線９であり、溶接電源部２と母材７を接続するのは母材用電線１０である。この実施例において、溶接ヘッド３のスタッド６が位置決めされる溶接部の位置に、ヘッド用電線９の途中に磁界形成コイル１５がヘッド用電線９に直列に接続されている。この磁界形成コイル１５は、図１の第１実施例のものと同じであり、溶接部において磁界を形成し、その磁界によって溶接アークの偏りを減少して溶接アークを一様にし、安定した溶接を得るものである。磁界形成コイル１５は、１つのやり方では、溶接電源部２から溶接ヘッド３に接続されるヘッド用電線９の一部を溶接部においてコイル形状に巻回することによって得ることができる。他のやり方では、磁界形成コイル１５をヘッド用電線９とは別に作っておき、その磁界形成コイル１５を溶接部に配置してヘッド用電線９の途中に直列に接続してもよい。いずれのやり方でも、溶接電源部２から溶接ヘッド３に接続されたヘッド用電線９を溶接部においてコイル形状にした磁界形成コイル１５とすることができる。この磁界形成コイル１５によっても、ヘッド用電線９の溶接アークを生成するための電流が、磁界形成コイル１５に溶接アークの生成に同期して流れるので、溶接電源とは別の磁界発生電流供給用電源を不要にするだけでなく、磁界の発生はアーク放電にそのまま同期するので同期のための制御部も不要になる。
【００１４】
図４は、本発明の第４の実施例を示している。この実施例は、図３の第３実施例とほぼ同じであるが、ヘッド用電線が、溶接電源部２から溶接ヘッド３に直接接続される第１ヘッド用電線１７と、溶接電源部２から溶接部の磁界形成コイル１５を経由して溶接ヘッド３に接続される第２ヘッド用電線１８とから成る点で違っている。磁界形成コイル１５の形成のやり方は、第３実施例と同じようにできる。この磁界形成コイル１５は、溶接部において磁界を形成して溶接アークの偏りを減少し、安定した溶接を得る。従って、第２ヘッド用電線１８の磁界形成コイル１５には、溶接アークの生成に同期して電流が流れるので、溶接電源とは別の磁界発生電流供給用電源を不要にするだけでなく、磁界の発生はアーク放電にそのまま同期するので同期のための制御部も不要になる。この第４実施例は、従来の溶接電源部２から溶接ヘッド３へ電流を供給する第１ヘッド用電線１７を持つ従来の溶接装置に、磁界形成コイル１５とその両端子から第２ヘッド用電線１８が延びるものを、溶接電源部２と溶接ヘッド３との間に付加し、その磁界形成コイル１５を溶接部に配置したものである。すなわち、従来の溶接装置への改変を最小限にできる利点がある。
【００１５】
【発明の効果】
本発明によれば、溶接電源が磁界発生電流供給用電源として用いられるので、溶接電源とは別の磁界発生電流供給用電源を不要にするとともに、磁界の発生はアーク放電時の電流を利用するので、アーク放電にそのまま同期し、同期のための制御部も不要になる。
【図面の簡単な説明】
【図１】本発明の第１実施例に係る溶接装置のブロック図である。
【図２】本発明の第２実施例に係る溶接装置のブロック図である。
【図３】本発明の第３実施例に係る溶接装置のブロック図である。
【図４】本発明の第４実施例に係る溶接装置のブロック図である。
【符号の説明】
１ スタッド溶接装置
２ 溶接電源部
３ 溶接ヘッド
５ 本体ハウジング
６ スタッド
７ 母材
９ ヘッド用電線
１０ 母材用電線
１１ 磁界形成コイル
１３ 第１母材用電線
１４ 第２母材用電線
１５ 磁界形成コイル
１７ 第１ヘッド用電線
１８ 第２ヘッド用電線[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to welding of a stud or the like in which a welding member such as a metal stud, a nut or a tubular member is held by a welding head and arc-welded to a base material at a welding portion. The present invention relates to a welding device and method for a stud or the like, which has a magnetic field forming coil for forming a magnetic field for reducing the bias of a welding arc when a welding arc is generated in a welding portion.
[0002]
[Prior art]
In order to hold a welding member such as a metal stud, a nut or a tubular member to a welding head and perform arc welding on a base material at a welding portion, a magnetic field that reduces the bias of the welding arc when a welding arc is generated is formed at the welding portion. Welding devices such as studs are known. JP-A-1-1970072 (Patent Document 1), JP-A-7-195176 (Patent Document 2), JP-A-7-251270 (Patent Document 3), and JP-A-10-128543 (Patent Document 4) Please refer to). These Patent Documents 1 to 4 disclose a technique of providing a magnetic field forming coil for forming a magnetic field in a welded portion, reducing the bias of the welding arc by the magnetic field, making the welding arc uniform, and obtaining stable welding. I have.
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 1-197072 [Patent Document 2]
JP-A-7-195176 [Patent Document 3]
JP-A-7-251270 [Patent Document 4]
JP-A-10-128543
[Problems to be solved by the invention]
JP-A-1-1970072 (Patent Document 1), JP-A-7-195176 (Patent Document 2), JP-A-7-251270 (Patent Document 3), and JP-A-10-128543 (Patent) In the welding device described in Document 4), a power source for supplying a magnetic field generating current to a coil for generating a magnetic field is required separately from a welding power source, and the generation of the magnetic field generating current is synchronized with the arc discharge. A control unit for controlling is also required.
[0005]
Accordingly, an object of the present invention is to eliminate the need for a power supply for supplying a magnetic field generating current separate from a welding power supply and to reduce the magnetic field generation by arc discharge in arc welding that forms a magnetic field that reduces the bias of the welding arc when the welding arc is generated. It is an object of the present invention to provide a welding device and method for studs and the like, which also eliminates the need for a control unit for synchronizing with the welding.
[0006]
[Means for Solving the Problems]
In order to achieve this object, the present invention reduces the bias of a welding arc in a welding portion when a welding arc is generated because a welding member such as a metal stud, a nut or a tubular member is arc-welded to a base material in the welding portion. A welding device such as a stud having a magnetic field forming coil for forming a magnetic field at a welding portion, wherein the magnetic field forming coil of the welding portion is connected in series with a base metal wire connected to the base material from a welding power supply unit of the welding device. And a welding device connected to the welding device. As a result, the welding power source is used as a power source for supplying a magnetic field generating current, so that a power source for supplying a magnetic field generating current that is different from the welding power source is not required, and the generation of the magnetic field is synchronized with the arc discharge as it is. There is no need for a control unit.
In the above welding apparatus, the base metal wire is connected to the base metal via the first base metal wire directly connected to the base metal from the welding power source and the welding power source via the magnetic field forming coil of the welded portion. It may be composed of a second base material electric wire.
[0007]
The present invention relates to a welding method for a stud or the like in which a welding member such as a stud is arc-welded to a base material at a welding portion, wherein a base material electric wire connected to the base material from a welding power source of the welding device is coiled at the welding portion. A welding method is provided in which a step of forming a shape is provided, and a magnetic field forming coil for forming a magnetic field that reduces the bias of the welding arc when a welding arc is generated is provided in series between the welding power supply unit and the base material. Is done. This also eliminates the need for a power supply for supplying a magnetic field generating current separate from the welding power supply, and also eliminates the need for a control unit for synchronizing the generation of the magnetic field with the arc discharge.
[0008]
The present invention welds a magnetic field forming coil that forms a magnetic field that reduces the bias of a welding arc in a welded portion when a welding arc is generated, because a welding member such as a stud is held by a welding head and arc welding is performed on the base material at the welded portion. A welding device such as a stud, wherein the magnetic field forming coil of the welding portion is connected in series in the middle of a head wire connected to a welding head from a welding power supply unit of the welding device. A welding device is provided. This also eliminates the need for a power supply for supplying a magnetic field generating current separate from the welding power supply, and also eliminates the need for a control unit for synchronizing the generation of the magnetic field with the arc discharge.
In the above welding device, the head electric wire is connected directly to the welding head from the welding power source and the second electric wire is connected to the welding head from the welding power source via the magnetic field forming coil of the welding portion. And a head electric wire.
[0009]
The present invention relates to a welding method of a stud or the like for holding a welding member such as a stud on a welding head and performing arc welding to a base material at a welding portion, wherein a head electric wire connected to a welding head from a welding power supply unit of a welding device. Forming a magnetic field for reducing the bias of the welding arc when a welding arc is generated, wherein a magnetic field forming coil for forming a magnetic field is provided in series between the welding power supply unit and the welding head. Provide welding method. This also eliminates the need for a power supply for supplying a magnetic field generating current separate from the welding power supply, and also eliminates the need for a control unit for synchronizing the generation of the magnetic field with the arc discharge.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a welding apparatus according to a first embodiment of the present invention. The welding apparatus in the embodiment uses a stud welding apparatus for welding a metal stud such as a stud bolt or a T stud to a base material such as a metal panel. However, another welding member such as a metal nut or a tubular member is arc welded. It may be a welding device. The stud welding apparatus in the embodiment is a so-called drone arc stud welding apparatus in which a small arc called a pilot arc is generated first and a main arc for arc welding is drawn out by the pilot arc. In FIG. 1, a stud welding apparatus 1 includes a welding power supply unit 2 and a welding head 3. The welding power source 2 is housed in the main body housing 5. A stud 6 as a welding member such as a stud bolt is held by the welding head 3 and is welded to a predetermined welded portion of the base material 7. An electric wire or a power cable (hereinafter, also referred to as an electric wire including the power cable) is connected to the welding head 3 and the base material 7 from the welding power source unit 2 for arc discharge. A head electric wire 9 connects the welding power source 2 to the welding head 3, and a base metal wire 10 connects the welding power source 2 to the base material 7.
[0011]
In the first embodiment, a magnetic field forming coil 11 is connected in series with the base metal wire 10 in the middle of the base metal wire 10 at the position of the welding portion where the stud 6 of the welding head 3 is positioned. The magnetic field forming coil 11 is disclosed in JP-A-1-1970072 (Patent Document 1), JP-A-7-195176 (Patent Document 2), JP-A-7-251270 (Patent Document 3), and JP-A-10-128543. As shown in Japanese Patent Application Laid-Open No. H10 (1998) -207, a magnetic field is formed in a welded portion, the bias of the welding arc is reduced by the magnetic field, the welding arc is made uniform, and stable welding is obtained. In one method, the magnetic field forming coil 11 can be obtained by winding a part of the base metal wire 10 connected from the welding power source unit 2 to the base metal 7 in a coil shape at the welding portion. In another method, the magnetic field forming coil 11 may be formed separately from the base metal wire 10, and the magnetic field forming coil 11 may be arranged at a welding portion and connected in series with the base metal wire 10. In either case, the base material electric wire 10 connected to the base material 7 from the welding power source 2 can be formed as a magnetic field forming coil 11 in a coil shape at the welded portion. As described above, since the magnetic field forming coil 11 is connected in series to the base metal wire 10, a current for generating a welding arc flows through the magnetic field forming coil 11 in synchronization with the generation of the welding arc. Not only eliminates the need for a separate power supply for generating a magnetic field, but also eliminates the need for a control unit for synchronization because the generation of the magnetic field is synchronized with the arc discharge.
[0012]
FIG. 2 shows a second embodiment of the present invention. This embodiment is substantially the same as the first embodiment of FIG. 1, except that a base metal wire is directly connected to the base metal 7 from the welding power source 2 and a welding power source. 2 and a second base material electric wire 14 connected to the base material 7 via the magnetic field forming coil 11 at the welded portion. The method of forming the magnetic field forming coil 11 can be the same as in the first embodiment. Further, the magnetic field forming coil 11 forms a magnetic field in the welded portion to reduce the bias of the welding arc and obtain stable welding. Accordingly, a current flows through the magnetic field forming coil 11 of the second base metal wire 14 in synchronization with the generation of the welding arc, so that not only a power source for supplying a magnetic field generating current separate from a welding power source is unnecessary, but also Since the generation of the magnetic field is synchronized with the arc discharge as it is, a control unit for synchronization is not required. In the second embodiment, a conventional welding apparatus having a first base material electric wire 13 for supplying a current from a conventional welding power source unit 2 to a base material 7 includes a magnetic field forming coil 11 and a second base material connected to both terminals thereof. The wire provided with the electric wire 14 is added between the welding power source unit 2 and the base material 7, and the coil 11 is arranged at the welding portion. That is, in this embodiment, the modification to the conventional welding device can be minimized.
[0013]
FIG. 3 shows a third embodiment of the present invention. 3, the stud welding apparatus 1 includes a welding head 3 for holding and welding a stud 6 at a welding portion between a welding power source unit 2 housed in a main body housing 5 and a base material 7, as in the first embodiment. I do. A head electric wire 9 connects the welding power source 2 to the welding head 3, and a base metal wire 10 connects the welding power source 2 to the base material 7. In this embodiment, a magnetic field forming coil 15 is connected in series with the head electric wire 9 in the middle of the head electric wire 9 at the position of the welding portion where the stud 6 of the welding head 3 is positioned. This magnetic field forming coil 15 is the same as that of the first embodiment shown in FIG. 1 and forms a magnetic field at the welded portion, and the magnetic field reduces the bias of the welding arc to make the welding arc uniform, thereby achieving stable welding. Is what you get. In one method, the magnetic field forming coil 15 can be obtained by winding a part of the head electric wire 9 connected from the welding power source 2 to the welding head 3 in a coil shape at the welding portion. In another method, the magnetic field forming coil 15 may be formed separately from the electric wire 9 for the head, and the magnetic field forming coil 15 may be arranged at the welding portion and connected in series with the electric wire 9 for the head. In either case, the electric wire for head 9 connected from the welding power source 2 to the welding head 3 can be formed into a magnetic field forming coil 15 having a coil shape at the welding portion. Also with this magnetic field forming coil 15, a current for generating a welding arc of the electric wire 9 for the head flows through the magnetic field forming coil 15 in synchronization with the generation of the welding arc. In addition to eliminating the need for a power supply, the generation of a magnetic field is synchronized with the arc discharge as it is, so that a control unit for synchronization is not required.
[0014]
FIG. 4 shows a fourth embodiment of the present invention. This embodiment is substantially the same as the third embodiment of FIG. 3, except that the head electric wire is connected to the first head electric wire 17 directly connected to the welding head 3 from the welding power source 2 and the welding power source 2. The second embodiment is different from the first embodiment in that it comprises a second head electric wire 18 connected to the welding head 3 via the magnetic field forming coil 15 of the welding portion. The method of forming the magnetic field forming coil 15 can be the same as in the third embodiment. The magnetic field forming coil 15 forms a magnetic field in the welded portion to reduce the bias of the welding arc and obtain stable welding. Therefore, a current flows through the magnetic field forming coil 15 of the second head electric wire 18 in synchronization with the generation of the welding arc, so that not only a power source for supplying a magnetic field generating current separate from a welding power source but also a magnetic field is not required. Is synchronized with the arc discharge as it is, so that a control unit for synchronization is not required. In the fourth embodiment, a conventional welding device having a first head electric wire 17 for supplying a current from the welding power source unit 2 to the welding head 3 is connected to the magnetic field forming coil 15 and both terminals thereof by using the second head electric wire. An extension 18 is added between the welding power source 2 and the welding head 3, and the magnetic field forming coil 15 is arranged at the welding portion. That is, there is an advantage that the modification to the conventional welding device can be minimized.
[0015]
【The invention's effect】
According to the present invention, since the welding power supply is used as a power supply for supplying a magnetic field generation current, a power supply for supplying a magnetic field generation current that is different from the welding power supply is not required, and the generation of the magnetic field utilizes the current at the time of arc discharge. Therefore, synchronization with the arc discharge is performed as it is, and a control unit for synchronization is not required.
[Brief description of the drawings]
FIG. 1 is a block diagram of a welding device according to a first embodiment of the present invention.
FIG. 2 is a block diagram of a welding device according to a second embodiment of the present invention.
FIG. 3 is a block diagram of a welding device according to a third embodiment of the present invention.
FIG. 4 is a block diagram of a welding device according to a fourth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stud welding apparatus 2 Welding power supply part 3 Welding head 5 Main body housing 6 Stud 7 Base material 9 Head wire 10 Base material wire 11 Magnetic field forming coil 13 First base material wire 14 Second base material wire 15 Magnetic field forming coil 17 Wire for first head 18 Wire for second head

Claims (6)

金属製のスタッド、ナット又は管状部材等の溶着部材を溶接部において母材にアーク溶接するため、溶接アーク発生時に前記溶接部における溶接アークの偏りを減少する磁界を形成する磁界形成コイルを前記溶接部に有する、スタッド等の溶接装置において、
前記溶接部の前記磁界形成コイルは、前記溶接装置の溶接電源部から前記母材に接続される母材用電線の途中に直列に接続されていることを特徴とする溶接装置。Since a welding member such as a metal stud, a nut, or a tubular member is arc-welded to a base material at a welding portion, a magnetic field forming coil that forms a magnetic field that reduces the bias of the welding arc at the welding portion when a welding arc is generated is welded. In a welding device such as a stud, which has a part,
The welding device according to claim 1, wherein the magnetic field forming coil of the welding portion is connected in series to a base metal wire connected to the base material from a welding power source of the welding device. 請求項１に記載の溶接装置において、前記母材用電線は、前記溶接電源部から前記母材に直接接続される第１母材用電線と、前記溶接電源部から前記溶接部の前記磁界形成コイルを経由して前記母材に接続される第２母材用電線とから成ることを特徴とする溶接装置。2. The welding device according to claim 1, wherein the electric wire for the base material is a first electric wire for the base material directly connected to the base material from the welding power supply unit, and the magnetic field formation of the welding portion from the welding power supply unit. A second base metal electric wire connected to the base metal via a coil. 金属製のスタッド、ナット又は管状部材等の溶着部材を溶接部において母材にアーク溶接するスタッド等の溶接方法において、
溶接装置の溶接電源部から前記母材に接続された母材用電線を前記溶接部においてコイル形状に形成するステップを含み、溶接アーク発生時に溶接アークの偏りを減少する磁界を形成する磁界形成コイルを前記溶接電源部と前記母材との間に直列に設けることを特徴とする溶接方法。In a welding method such as a stud for welding a welding member such as a metal stud, a nut or a tubular member to a base material at a welding portion by arc welding,
Forming a base metal wire connected to the base material from the welding power source of the welding device into a coil shape at the welded portion, and forming a magnetic field for reducing the bias of the welding arc when a welding arc is generated; Is provided in series between the welding power supply unit and the base material. 金属製のスタッド、ナット又は管状部材等の溶着部材を溶接ヘッドに保持して溶接部において母材にアーク溶接するため、溶接アーク発生時に前記溶接部における溶接アークの偏りを減少する磁界を形成する磁界形成コイルを前記溶接部に有する、スタッド等の溶接装置において、
前記溶接部の前記磁界形成コイルは、前記溶接装置の溶接電源部から前記溶接ヘッドに接続されるヘッド用電線の途中に直列に接続されていることを特徴とする溶接装置。Since a welding member such as a metal stud, a nut, or a tubular member is held by a welding head and arc-welded to a base material at a welding portion, a magnetic field that reduces the bias of the welding arc at the welding portion when a welding arc is generated. In a welding device such as a stud having a magnetic field forming coil at the welding portion,
The welding device according to claim 1, wherein the magnetic field forming coil of the welding portion is connected in series in a middle of a head electric wire connected to the welding head from a welding power supply unit of the welding device. 請求項４に記載の溶接装置において、前記ヘッド用電線は、前記溶接電源部から前記溶接ヘッドに直接接続される第１ヘッド用電線と、前記溶接電源部から前記溶接部の前記磁界形成コイルを経由して前記溶接ヘッドに接続される第２ヘッド用電線とから成ることを特徴とする溶接装置。5. The welding device according to claim 4, wherein the head electric wire includes a first head electric wire directly connected to the welding head from the welding power supply unit, and the magnetic field forming coil of the welding portion from the welding power supply unit. 6. And a second head electric wire connected to the welding head via the second welding head. 金属製のスタッド、ナット又は管状部材等の溶着部材を溶接ヘッドに保持して溶接部において母材にアーク溶接するスタッド等の溶接方法において、
溶接装置の溶接電源部から前記溶接ヘッドに接続されたヘッド用電線を前記溶接部においてコイル形状に形成するステップを含み、溶接アーク発生時に溶接アークの偏りを減少する磁界を形成する磁界形成コイルを前記溶接電源部と前記溶接ヘッドとの間に直列に設けることを特徴とする溶接方法。In a welding method of a stud or the like in which a welding member such as a metal stud, a nut or a tubular member is held on a welding head and arc-welded to a base material at a welding portion,
Forming a head electric wire connected to the welding head from the welding power supply unit of the welding device into a coil shape at the welding portion, and forming a magnetic field forming coil for forming a magnetic field that reduces the bias of the welding arc when a welding arc is generated. A welding method, wherein the welding power supply unit and the welding head are provided in series between the welding power supply unit and the welding head.
JP2002316109A 2002-10-30 2002-10-30 Method and device for arc welding stud and the like Pending JP2004148355A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008137078A (en) * 2006-11-30 2008-06-19 Newfrey Llc Welding head
DE102007020839A1 (en) * 2007-05-02 2008-11-06 Nelson Stud Welding, Inc., Elyria Method and device for stud welding of welded parts with in particular elongated welding surface
CN103692094A (en) * 2013-12-23 2014-04-02 南京理工大学 Method and device for welding studs by applying resistor-electric arc composite heat source

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008137078A (en) * 2006-11-30 2008-06-19 Newfrey Llc Welding head
DE102007020839A1 (en) * 2007-05-02 2008-11-06 Nelson Stud Welding, Inc., Elyria Method and device for stud welding of welded parts with in particular elongated welding surface
CN103692094A (en) * 2013-12-23 2014-04-02 南京理工大学 Method and device for welding studs by applying resistor-electric arc composite heat source
CN103692094B (en) * 2013-12-23 2015-09-02 南京理工大学 A kind of stud welding method and device applying resistance and arc composite heat source

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