JP5375189B2 - Contact tip for welding power supply - Google Patents

Contact tip for welding power supply Download PDF

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JP5375189B2
JP5375189B2 JP2009046315A JP2009046315A JP5375189B2 JP 5375189 B2 JP5375189 B2 JP 5375189B2 JP 2009046315 A JP2009046315 A JP 2009046315A JP 2009046315 A JP2009046315 A JP 2009046315A JP 5375189 B2 JP5375189 B2 JP 5375189B2
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welding wire
power supply
welding
tip
feeding
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JP2010201431A (en
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浩 宮岡
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Nissan Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To suppress instability of electric power feeding for a welding wire caused by uneven wear of feeding tips. <P>SOLUTION: Arc welding is performed by feeding power with a feeding tip 25 to a welding wire 5 inserted in a wire insertion hole 3. A plurality of the feeding tips 25 are installed along the periphery of the welding wire 5, an electrode sliding face 25a on the inner side is brought into slide-contact with the welding wire 5, and a sliding inclined face 25c on the outer side is brought into slide-contact with the conical inner face 7d of a tip end body 7. In this state, the feeding tips 25 are pressurized to the tip end side by a coil spring 27. The plurality of the feeding tips 25 are individually moved forward in the moving direction of the welding wire 5, in accordance with wear due to the sliding of the electrode sliding face 25a with respect to the welding wire 5. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、ボディ内に移動可能に挿入した溶接ワイヤに給電する給電子を備えた溶接給電用コンタクトチップに関する。 The present invention relates to a welding power supply contact chip having a sheet electron feeding the welding wire inserted movably in the body.

従来アーク溶接を行うに際に使用する給電用コンタクトチップは、ボディ内に形成したワイヤ挿入孔に溶接ワイヤを移動可能に挿入し、この溶接ワイヤを前方に送りつつその外周側に設けた給電子によって溶接ワイヤに給電している(例えば下記特許文献1参照)。   Conventionally, a contact tip for power supply used when performing arc welding is such that a welding wire is movably inserted into a wire insertion hole formed in a body, and this welding wire is fed forward and provided on the outer peripheral side thereof. (See, for example, Patent Document 1 below).

特開2007−21541号公報JP 2007-21541 A

ところで、溶接ワイヤを溶接時に順次前方に送給する際には、給電子が溶接ワイヤとの摺動や温度上昇によって磨耗するが、溶接方向が偏るなど溶接方法によっては磨耗が不均一となる場合があり、このような場合には、給電が不安定となって溶接不良を引き起こす。   By the way, when the welding wire is fed forward sequentially during welding, the power supply wears due to sliding with the welding wire or temperature rise, but the wear may be uneven depending on the welding method such as the welding direction being biased In such a case, the power feeding becomes unstable, resulting in poor welding.

そこで、本発明は、給電子の磨耗が不均一になることによる溶接ワイヤに対する給電の不安定状態を抑制することを目的としている。   Accordingly, an object of the present invention is to suppress an unstable state of power feeding to a welding wire due to uneven wear of the power supply electrons.

本発明は、溶接ワイヤに給電する給電子を、溶接ワイヤの周囲に沿って複数設けるとともに、ボディ内面に、溶接ワイヤの移動方向前方側ほど溶接ワイヤに近付くよう傾斜する傾斜ガイド部を設け、複数の給電子は、傾斜ガイド部に摺接するボディ摺接部を備えて溶接ワイヤの移動方向に沿って個別に移動可能とし、各給電子を溶接ワイヤの移動方向前方側に押圧する押圧手段を設け、ボディの先端に、溶接ワイヤが移動可能に挿入されて溶接ワイヤの移動方向と交差する方向の位置決めを行う位置決め部材を設け、押圧手段は、複数の給電子に対して個別に設けられていることを特徴とする。 The present invention provides a plurality of power supply units for supplying power to the welding wire along the periphery of the welding wire, and an inclined guide portion that is inclined on the inner surface of the body so as to approach the welding wire toward the front side in the moving direction of the welding wire. The power supply is provided with a body sliding contact portion that is slidably contacted with the inclined guide portion, and can be individually moved along the moving direction of the welding wire, and is provided with a pressing means that presses each power supply toward the front side of the welding wire moving direction. A positioning member is provided at the front end of the body so that the welding wire is movably inserted to perform positioning in a direction crossing the moving direction of the welding wire, and the pressing means are individually provided for a plurality of feeders. It is characterized by that.

本発明によれば、複数の給電子相互間で溶接ワイヤとの摺動による磨耗が不均一になったとしても、これら複数の給電子は、磨耗に伴ってボディ摺接部が傾斜ガイド部にガイドされることで溶接ワイヤに摺接した状態を維持しつつ溶接ワイヤの移動方向に沿って個別に移動するので、給電子の磨耗が不均一になることによる溶接ワイヤへの給電の不安定状態を抑制することができる。
また、本発明によれば、各給電子を、溶接ワイヤの移動方向前方側に押圧する押圧手段を設けているので、給電子の磨耗に伴う前方への移動を磨耗とほぼ同時に行うことができ、給電子の溶接ワイヤに対する接触状態を連続して維持することができる。
また、本発明よれば、ボディの先端側に、溶接ワイヤが移動可能に挿入されて該溶接ワイヤの位置決めを行う位置きめ部材を設けているので、溶接ワイヤは、ワイヤ挿入孔の中心に位置した状態で前方へ移動することになり、複数の給電子相互間での偏磨耗を抑えることができる。
According to the present invention, even if the wear due to the sliding with the welding wire becomes uneven between the plurality of power supply electrons, the plurality of power supply units are changed from the body sliding contact portion to the inclined guide portion with the wear. Since the guide wire moves individually along the moving direction of the welding wire while maintaining the state of sliding contact with the welding wire, the power supply to the welding wire is unstable due to uneven wear of the power supply Can be suppressed.
Further, according to the present invention, since the pressing means is provided to press each of the supplied electrons forward in the moving direction of the welding wire, the forward movement accompanying the wear of the supplied electrons can be performed almost simultaneously with the wear. The contact state of the power supply to the welding wire can be continuously maintained.
Further, according to the present invention, the welding wire is positioned at the center of the wire insertion hole because the welding wire is movably inserted and positioned to position the welding wire. It moves to the front in a state, and the partial wear between a plurality of electric power supply can be suppressed.

本発明の第1の実施形態に係わる溶接給電用コンタクトチップの先端部を示す断面図である。It is sectional drawing which shows the front-end | tip part of the contact tip for welding electric power feeding concerning the 1st Embodiment of this invention. 図1の溶接給電用コンタクトチップの分解図である。It is an exploded view of the contact tip for welding electric power feeding of FIG. (a)は図1のA−A断面図、(b)は図1のB−B断面図である。(A) is AA sectional drawing of FIG. 1, (b) is BB sectional drawing of FIG. 本発明の第2の実施形態に係わる溶接給電用コンタクトチップの先端部を示す断面である。It is a cross section which shows the front-end | tip part of the contact tip for welding electric power feeding concerning the 2nd Embodiment of this invention. 図4の溶接給電用コンタクトチップの分解図である。It is an exploded view of the contact tip for welding electric power feeding of FIG. (a)は図4のC−C断面図、(b)は図4のD−D断面図である。(A) is CC sectional drawing of FIG. 4, (b) is DD sectional drawing of FIG.

以下、本発明の実施の形態を図面に基づき説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図1は、本発明の第1の実施形態に係わる溶接給電用コンタクトチップの先端部を示す断面図、図2はその分解図である。この溶接給電用コンタクトチップは、例えば炭酸ガスアーク溶接やMIG溶接などのようなGMA溶接にて使用するもので、ボディ1内に形成してあるワイヤ挿入孔3にワイヤ電極である溶接ワイヤ5をその軸線方向沿って移動可能に挿入してある。   FIG. 1 is a cross-sectional view showing a tip portion of a contact tip for welding power feeding according to a first embodiment of the present invention, and FIG. 2 is an exploded view thereof. The contact tip for welding power supply is used in GMA welding such as carbon dioxide arc welding and MIG welding, for example, and a welding wire 5 as a wire electrode is inserted into a wire insertion hole 3 formed in the body 1. It is inserted so as to be movable along the axial direction.

ボディ1は、中空の導電性材料からなる先端ボディ7と、この先端ボディ7内に先端側が収容される内部ボディ9とを備え、内部ボディ9の中心部に軸線方向に向けて形成してある貫通孔9aが上記したワイヤ挿入孔3の一部を構成している。なお、貫通孔9aの直径は溶接ワイヤ5の直径より大きく形成している。   The body 1 includes a distal end body 7 made of a hollow conductive material and an inner body 9 in which the distal end side is accommodated in the distal body 7 and is formed in the central portion of the inner body 9 in the axial direction. The through hole 9a constitutes a part of the wire insertion hole 3 described above. The diameter of the through hole 9a is formed larger than the diameter of the welding wire 5.

先端ボディ7は、内部ボディ9を収容する空間が、図1中で上部の基端側の円柱空間部分11と、円柱空間部分11の先端側に連続する円錐空間部分13とを備えている。円錐形状部分13の先細の先端側には、この円錐空間部分13の先端の内径とほぼ同内径の先端貫通孔15が連続している。   The distal end body 7 includes a cylindrical space portion 11 on the upper base end side in FIG. 1 and a conical space portion 13 continuous to the distal end side of the cylindrical space portion 11 in FIG. A tip through hole 15 having an inner diameter substantially the same as the inner diameter of the tip of the conical space portion 13 is continuous with the tapered tip side of the cone-shaped portion 13.

この先端貫通孔15のさらに先端部には、切欠凹部17を形成してあり、切欠凹部17に、溶接ワイヤ5の移動方向に対して直交する方向の位置決めを行う位置決め部材としての位置決めチップ19を取り付けている。位置決めチップ19は、硬質で耐熱性及び耐摩耗性の高い材質である例えばセラミックスなどの絶縁性材料で構成してあり、その中心部に形成してある貫通孔19aに、溶接ワイヤ5を挿入して前方に引き出している。なお、貫通孔19aの直径は溶接ワイヤ5の直径より僅かに大きく形成してあり、これら相互間の隙間を狭くして位置決めを行うようにしている。   A notch recess 17 is formed at the tip of the tip through-hole 15, and a positioning chip 19 as a positioning member for positioning in the direction orthogonal to the moving direction of the welding wire 5 is formed in the notch recess 17. It is attached. The positioning tip 19 is made of an insulating material such as ceramic, which is a hard material having high heat resistance and wear resistance, and the welding wire 5 is inserted into the through hole 19a formed in the center portion thereof. And pull it forward. In addition, the diameter of the through-hole 19a is formed slightly larger than the diameter of the welding wire 5, and positioning is performed by narrowing the gap between them.

内部ボディ9は、基端側の外周に雄ねじ部9bを形成してあり、この雄ねじ部9bを、先端ボディ7の基端側における円柱空間部分11の内面に形成してある雌ねじ部7aにねじ込むことで両者を固定している。その際、雄ねじ部9bの基端側の端面9cが先端ボディ7の基端面7bに当接して位置決めされる。また、内部ボディ9は、雄ねじ部9bの先端側に先端細径部9dを備え、先端細径部9dのさらに先端側を、先細の円錐形状部9eとしている。   The internal body 9 has a male threaded portion 9b formed on the outer periphery on the proximal end side, and this male threaded portion 9b is screwed into a female threaded portion 7a formed on the inner surface of the cylindrical space portion 11 on the proximal end side of the distal end body 7. Both are fixed. At that time, the end surface 9c on the base end side of the male screw portion 9b is positioned in contact with the base end surface 7b of the front end body 7. Further, the inner body 9 includes a distal end narrow diameter portion 9d on the distal end side of the male screw portion 9b, and a distal end side of the distal end narrow diameter portion 9d is a tapered conical portion 9e.

ここで、先端ボディ7の円柱空間部分11に対応する円筒内面7cと内部ボディ9の先端細径部9dとの間には環状の隙間21を形成してあり、また先端ボディ7の円錐空間部分13に対応する傾斜ガイド部となる円錐内面7dと、先端細径部9dの一部及び円錐形状部9eとの間にも環状の隙間23を形成している。   Here, an annular gap 21 is formed between the cylindrical inner surface 7 c corresponding to the cylindrical space portion 11 of the tip body 7 and the tip narrow diameter portion 9 d of the inner body 9, and the conical space portion of the tip body 7 is also provided. An annular gap 23 is also formed between the conical inner surface 7d serving as the inclined guide portion corresponding to 13 and a portion of the tip narrow diameter portion 9d and the conical shape portion 9e.

また、内部ボディ9における先端細径部9dの円錐形状部9e側近傍から円錐形状部9eにわたり、図1のB−B断面図である図3(b)に示すように、中心の貫通孔9aから放射状に延びるスリット9fを形成している。このスリット9fは、円周方向に沿って等間隔に3つ設けてあり、これら各スリット9fに、ほぼ直角三角形の板状部材からなる給電子25の一部を移動可能に挿入している。すなわち、この各給電子25は、溶接ワイヤ5の周囲に沿って複数設けていることになる。   Further, as shown in FIG. 3 (b), which is a cross-sectional view taken along the line BB of FIG. 1, from the vicinity of the cone-shaped portion 9e side of the narrow-end portion 9d of the inner body 9 to the cone-shaped portion 9e, a central through hole 9a is formed. The slits 9f extending radially from are formed. Three slits 9f are provided at equal intervals in the circumferential direction, and a part of the feeder 25 made of a plate member having a substantially right triangle is movably inserted into each slit 9f. That is, a plurality of each of the power supply 25 is provided along the periphery of the welding wire 5.

上記した給電子25は、溶接ワイヤ5に摺接して該溶接ワイヤ5に沿って図1中で上下方向に延びる電極摺動部となる電極摺動面25aと、電極摺動面25aの図1中で上端部に対し直径方向外側に向けて延びる基端面25bと、基端面25bの外側端部と電極摺動面25aの先端部(図1中で下端部)とを接続するボディ摺接部としての摺動傾斜面25cとを備えている。   The above-described power supply 25 is in sliding contact with the welding wire 5 and is an electrode sliding surface 25a serving as an electrode sliding portion extending in the vertical direction in FIG. 1 along the welding wire 5, and FIG. 1 showing the electrode sliding surface 25a. A base end surface 25b extending radially outward with respect to the upper end portion, and a body sliding contact portion connecting the outer end portion of the base end surface 25b and the front end portion (lower end portion in FIG. 1) of the electrode sliding surface 25a. And a sliding inclined surface 25c.

摺動傾斜面25cは、電極摺動面25aが溶接ワイヤ5に接触した状態で、先端ボディ7の円錐内面7dにそのほぼ全面が接触しており、この接触状態で、給電子25の先細側の先端面25dは、円錐空間部分13と先端貫通孔15との境界部分に位置している。   The sliding inclined surface 25c is almost entirely in contact with the conical inner surface 7d of the tip body 7 in a state where the electrode sliding surface 25a is in contact with the welding wire 5, and in this contact state, the tapered side of the feeder 25 The front end surface 25 d is located at the boundary portion between the conical space portion 13 and the front end through hole 15.

また、給電子25は、スリット9fに挿入した状態で、スリット9fから外側の環状の隙間23に一部が突出しており、この突出した一部の基端面25bと、内部ボディ9の雄ねじ部9bを形成した部分の下端面9gとの間に、給電子25を先端側に押し付けて押圧する押圧手段としての弾性手段であるコイルスプリング27を介装している。   In addition, the power supply 25 is partially inserted into the outer annular gap 23 from the slit 9f in a state of being inserted into the slit 9f, and the protruding part of the base end face 25b and the external thread portion 9b of the internal body 9 are provided. A coil spring 27, which is an elastic means as a pressing means that presses and presses the power supply 25 against the tip end side, is interposed between the lower end surface 9g of the portion formed.

次に、作用を説明する。複数の給電子25は、コイルスプリング27により図1中で下部の先端側に押し付けられ、これにより各給電子25は、溶接ワイヤ5と先端ボディ7の円錐内面7dとの間に楔を入れたような形となる。この結果各給電子25は、電極摺動面25aが溶接ワイヤ5に接触しつつ押し付けられるとともに、摺動傾斜面25cが円錐内面7dに接触しつつ押し付けられた状態となる。   Next, the operation will be described. The plurality of feeders 25 are pressed against the lower tip side in FIG. 1 by the coil spring 27, whereby each of the feeders 25 is wedged between the welding wire 5 and the conical inner surface 7 d of the tip body 7. It looks like this. As a result, each power supply 25 is pressed while the electrode sliding surface 25a is in contact with the welding wire 5, and the sliding inclined surface 25c is pressed while in contact with the conical inner surface 7d.

なお、このときのコイルスプリング27の給電子25に対する押し付け力は、溶接ワイヤ5が撓まない程度としておく。   Note that the pressing force of the coil spring 27 against the power supply 25 at this time is set so that the welding wire 5 is not bent.

したがって、この状態で先端ボディ7と溶接ワイヤ5とは給電子25を介して電気的に接続した状態となり、溶接ワイヤ5への給電が可能となる。   Therefore, in this state, the tip body 7 and the welding wire 5 are in an electrically connected state via the power supply 25, and power supply to the welding wire 5 is possible.

そして、このようにして溶接ワイヤ5への給電を行いつつ溶接ワイヤ5を順次先端側へ送給することで、溶接作業を行う。溶接ワイヤ5が順次送給されるときには、先端の位置決めチップ19に位置決めされつつガイドされる。   And welding work is performed by feeding the welding wire 5 sequentially to the distal end side while feeding the welding wire 5 in this way. When the welding wires 5 are sequentially fed, they are guided while being positioned by the positioning tip 19 at the tip.

ここで、複数の給電子25は、溶接ワイヤ5と摺接することで電極摺動面25aが磨耗するが、この磨耗に伴って、コイルスプリング27に押し付けられている給電子25は、摺動傾斜面25cが先端ボディ7の円錐内面7dに沿ってガイドされつつ先端側に移動する。したがって、電極摺動面25aが磨耗したとしても、給電子25は、コイルスプリング27に押し付けられた状態が継続しているので、溶接ワイヤ5への接触状態は、磨耗した分コイルスプリング27による押圧力が僅かに低下するもののほぼ変化することなく、ほぼ一定に維持される。   Here, although the plurality of power supply units 25 are in sliding contact with the welding wire 5, the electrode sliding surface 25 a is worn, and with this wear, the power supply units 25 pressed against the coil spring 27 are slidingly inclined. The surface 25c moves to the tip side while being guided along the conical inner surface 7d of the tip body 7. Therefore, even if the electrode sliding surface 25a is worn, the state where the power supply 25 is pressed against the coil spring 27 continues. Therefore, the contact state with the welding wire 5 is reduced by the amount of wear caused by the coil spring 27. Although the pressure drops slightly, it remains almost constant with almost no change.

このような給電子25の溶接ワイヤ5への接触状態は、複数の給電子25を個別に移動可能としてあるので、複数の給電子25相互間で、溶接方向が偏るなど溶接方法によって磨耗が不均一となったとしても、ほぼ一定に維持することができる。その結果、溶接ワイヤ5への給電が安定化して溶接不良を抑えることができ、チップ交換頻度も低くなってコスト低下を図ることができる。   The contact state of the power supply 25 to the welding wire 5 is such that the plurality of power supply 25 can be individually moved. Therefore, wear is not caused by a welding method such that the welding direction is deviated between the plurality of power supply 25. Even if it becomes uniform, it can be maintained substantially constant. As a result, power feeding to the welding wire 5 can be stabilized and welding failure can be suppressed, the frequency of chip replacement can be reduced, and the cost can be reduced.

また、本実施形態では、各給電子25を、溶接ワイヤ25の移動方向前方側に押圧する押圧手段をコイルスプリング27として設けているので、電極摺動面25aの磨耗に伴う前方への移動を磨耗とほぼ同時に行うことができ、電極摺動面25aの溶接ワイヤ5に対する接触状態を連続して維持することができる。   Moreover, in this embodiment, since the pressing means which presses each electric power supply 25 to the front side of the moving direction of the welding wire 25 is provided as the coil spring 27, the forward movement accompanying wear of the electrode sliding surface 25a is provided. It can be performed almost simultaneously with the wear, and the contact state of the electrode sliding surface 25a with the welding wire 5 can be continuously maintained.

また、本実施形態では、先端ボディ7の先端側に、溶接ワイヤ5が移動可能に挿入されて該溶接ワイヤ5の位置決めを行う位置きめチップ19を設けているので、溶接ワイヤ5は、ワイヤ挿入孔3の中心に位置した状態で前方へ移動することになり、複数の給電子25相互間での偏磨耗を抑えることができる。また、このとき位置決めチップ19は、硬質の材料で構成しているので、磨耗を低く抑えることができる。   Further, in the present embodiment, since the welding wire 5 is movably inserted into the distal end side of the distal body 7 and the positioning tip 19 for positioning the welding wire 5 is provided, the welding wire 5 is inserted into the wire. It moves to the front in a state where it is located at the center of the hole 3, and uneven wear between the plurality of power supply units 25 can be suppressed. At this time, since the positioning tip 19 is made of a hard material, wear can be kept low.

図4〜図6は、本発明の第2の実施形態に係わる溶接給電用コンタクトチップを示すもので、前記した第1の実施形態を示す図1〜図3にそれぞれ対応している。第2の実施形態の溶接給電用コンタクトチップは、第1の実施形態に対し、給電子29の形状を異ならせ、これに対応して内部ボディ9の雄ねじ部9bより先端側の、主として給電子29を収容する部分の形状を異ならせている。先端ボディ7については、第1の実施形態と同様のものを使用している。   FIGS. 4-6 shows the contact tip for welding electric power feeding concerning the 2nd Embodiment of this invention, and respond | corresponds to FIGS. 1-3 which respectively show the above-mentioned 1st Embodiment. The contact tip for welding power supply of the second embodiment differs from the first embodiment in the shape of the power supply 29, and in response to this, mainly the power supply on the front end side of the male screw portion 9b of the internal body 9 is different. The shape of the part which accommodates 29 is varied. The tip body 7 is the same as that of the first embodiment.

すなわち、第2の実施形態の内部ボディ9は、雄ねじ部9bより先端側を雄ねじ部9bとほぼ同等の外径を有する円柱部9hとしてそのさらに先端側を、先細の円錐形状部9iとしている。そして、上記雄ねじ部9bより先端側の円柱部9hから円錐形状部9iにわたり、貫通孔9aに対して傾斜しているスリット9jを内部ボディ9に形成している。   That is, the inner body 9 of the second embodiment has a cylindrical portion 9h having an outer diameter substantially equal to that of the male screw portion 9b on the tip side from the male screw portion 9b, and a tapered cone-shaped portion 9i on the tip side. A slit 9j that is inclined with respect to the through hole 9a is formed in the internal body 9 from the cylindrical portion 9h on the tip side to the male screw portion 9b to the conical portion 9i.

このスリット9jは、先端側ほど貫通孔9aに接近するよう傾斜しており、該スリット9jに前記した給電子29の一部を移動可能に収容している。給電子29は、先端側に溶接ワイヤ5に摺接して該溶接ワイヤ5に沿って図1中で上下方向に延びる電極摺動面29aと、先端ボディ7の円錐内面7dに摺動接触するボディ摺接部としての摺動傾斜面29cとを備えており、図5中での中心点Pに対して点対称な形状としている。   The slit 9j is inclined so as to approach the through hole 9a toward the tip end side, and a part of the above-described electron supply 29 is movably accommodated in the slit 9j. The power supply 29 is in sliding contact with the welding wire 5 on the distal end side and extends in the vertical direction in FIG. 1 along the welding wire 5, and a body that is in sliding contact with the conical inner surface 7 d of the distal end body 7. A sliding inclined surface 29c as a sliding contact portion is provided, and the shape is point-symmetric with respect to the center point P in FIG.

すなわち、給電子29は、摺動傾斜面29cと反対側に摺動傾斜面29cと平行な傾斜面29dを備えて、これら摺動傾斜面29c及び傾斜面29dに沿って長い形状としてスリット9jに収容している。そして、この給電子29は、スリット9jに収容した状態で、電極摺動面29aを備える先端側がスリット9jから前方に突出するとともに、スリット9jから外側の環状の隙間23にも一部が突出して、摺動傾斜面29cが先端ボディ7の円錐内面7dに接触している。   That is, the power supply 29 is provided with an inclined surface 29d parallel to the sliding inclined surface 29c on the side opposite to the sliding inclined surface 29c, and the slit 9j has a long shape along the sliding inclined surface 29c and the inclined surface 29d. Contained. In the state where the power supply 29 is accommodated in the slit 9j, the tip end side including the electrode sliding surface 29a protrudes forward from the slit 9j, and a part protrudes from the slit 9j also to the outer annular gap 23. The sliding inclined surface 29 c is in contact with the conical inner surface 7 d of the tip body 7.

第2の実施形態においては、第1の実施形態のように、給電子29を押し付けるコイルスプリング27を設けていないので、チップ先端側を鉛直方向下部として使用することで、給電子29はその自重により先端側に押し付けられる。その結果給電子29は、電極摺動面29aが溶接ワイヤ5に接触しつつ押し付けられるとともに、摺動傾斜面29cが円錐内面7dに接触しつつ押し付けられた状態となる。   In the second embodiment, unlike the first embodiment, the coil spring 27 that presses the power supply 29 is not provided. Therefore, by using the tip end side as the lower part in the vertical direction, the power supply 29 can reduce its own weight. Is pressed against the tip side. As a result, the power supply 29 is pressed while the electrode sliding surface 29a is in contact with the welding wire 5 and the sliding inclined surface 29c is pressed while in contact with the conical inner surface 7d.

したがって、第2の実施形態においても、複数の給電子29は、溶接ワイヤ5と摺接することで電極摺動面29aが磨耗するが、この磨耗に伴って、下方に向けて押し付けられている給電子29は、摺動傾斜面29cが円錐内面7dに沿ってガイドされつつ先端側に移動する。よって、電極摺動面29aが摩耗したとしても、給電子29は、自重によって下方に向けて押し付けられた状態が継続するので、溶接ワイヤ5に対する接触状態は、磨耗した分自重による押圧力が僅かに低下するもののほぼ変化することなく、ほぼ一定に維持される。   Accordingly, also in the second embodiment, the plurality of power supply electrodes 29 wears on the electrode sliding surface 29a by sliding contact with the welding wire 5, but with this wear, the power supply 29 is pressed downward. The electrons 29 move to the tip side while the sliding inclined surface 29c is guided along the conical inner surface 7d. Therefore, even if the electrode sliding surface 29a wears, the state where the power supply 29 is pressed downward by its own weight continues. Therefore, the contact state with respect to the welding wire 5 has a slight pressing force due to its own weight. However, it remains almost constant with almost no change.

このような給電子29の溶接ワイヤ5への接触状態は、第1の実施形態と同様に複数の給電子29が個別に移動可能としてあるため、複数の給電子29相互間で、溶接方向が偏るなど溶接方法によって磨耗が不均一となったとしても、ほぼ一定に維持することができ、溶接ワイヤ5への給電が安定化して溶接不良を抑えることができる。   The contact state of the power supply 29 to the welding wire 5 is such that the plurality of power supply 29 can be moved individually as in the first embodiment. Even if the wear becomes uneven due to a welding method such as bias, it can be maintained substantially constant, power feeding to the welding wire 5 can be stabilized, and poor welding can be suppressed.

また、第2の実施形態では、第1の実施形態のように、給電子29を押し付けるコイルスプリング27を設けていないので、その分部品点数を削減でき、設備コストの低減を図ることができる。   Further, in the second embodiment, unlike the first embodiment, since the coil spring 27 that presses the power supply 29 is not provided, the number of parts can be reduced correspondingly, and the equipment cost can be reduced.

3 ワイヤ挿入孔
5 溶接ワイヤ
7 先端ボディ(ボディ)
7d 先端ボディの円錐内面(傾斜ガイド部)
9 内部ボディ(ボディ)
19 位置決めチップ(位置決め部材)
25,29 給電子
25c,29c 給電子の摺動傾斜面(ボディ摺接部)
27 コイルスプリング(押圧手段)
3 Wire insertion hole 5 Welding wire 7 Tip body (body)
7d Conical inner surface of tip body (inclined guide part)
9 Internal body (body)
19 Positioning chip (positioning member)
25, 29 Power supply 25c, 29c Sliding inclined surface of the power supply (body sliding contact portion)
27 Coil spring (pressing means)

Claims (1)

ボディ内に設けたワイヤ挿入孔に溶接ワイヤを移動可能に挿入し、この溶接ワイヤに給電する給電子を前記ボディ内に備えた溶接給電用コンタクトチップにおいて、前記給電子を、前記溶接ワイヤの周囲に沿って複数設けるとともに、前記ボディ内面に、前記溶接ワイヤの移動方向前方側ほど溶接ワイヤに近付くよう傾斜する傾斜ガイド部を設け、前記複数の給電子は、前記傾斜ガイド部に摺接するボディ摺接部を備えて前記溶接ワイヤの移動方向に沿って個別に移動可能とし
前記各給電子を前記溶接ワイヤの移動方向前方側に押圧する押圧手段を設け、
前記ボディの先端に、前記溶接ワイヤが移動可能に挿入されて該溶接ワイヤの移動方向と交差する方向の位置決めを行う位置決め部材を設け、
前記押圧手段は、前記複数の給電子に対して個別に設けられていることを特徴とする溶接給電用コンタクトチップ。
In a contact tip for welding power feeding, in which a welding wire is movably inserted into a wire insertion hole provided in the body, and a power supply for supplying power to the welding wire is provided in the body, the power supply is arranged around the welding wire. Are provided along the inner surface of the body, and an inclined guide portion is provided on the inner surface of the body so as to be closer to the welding wire toward the front side in the moving direction of the welding wire. It is possible to individually move along the moving direction of the welding wire with a contact portion ,
Providing a pressing means for pressing each of the power supply to the front side in the moving direction of the welding wire;
A positioning member is provided at the distal end of the body for positioning in a direction intersecting with the moving direction of the welding wire by inserting the welding wire movably.
The contact point for welding power feeding, wherein the pressing means is individually provided for the plurality of power supply electrons.
JP2009046315A 2009-02-27 2009-02-27 Contact tip for welding power supply Expired - Fee Related JP5375189B2 (en)

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