JP2009148790A - Consumable electrode type welding torch - Google Patents

Consumable electrode type welding torch Download PDF

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JP2009148790A
JP2009148790A JP2007328595A JP2007328595A JP2009148790A JP 2009148790 A JP2009148790 A JP 2009148790A JP 2007328595 A JP2007328595 A JP 2007328595A JP 2007328595 A JP2007328595 A JP 2007328595A JP 2009148790 A JP2009148790 A JP 2009148790A
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tip
consumable electrode
piezoelectric element
welding torch
tip body
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JP4907511B2 (en
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Toru Okada
徹 岡田
Keiichi Suzuki
啓一 鈴木
Akira Chin
亮 陳
Eri Yamamoto
恵理 山本
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Kobe Steel Ltd
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Kobe Steel Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a consumable electrode type welding torch capable of suppressing production of spatter by reliably performing the transfer of droplets by oscillating a welding wire at the frequency higher than 500 Hz or more. <P>SOLUTION: In the consumable electrode type welding torch 1, a hollow attaching tool is provided to a torch main body, and a long tip body 4 for holding a welding wire 2 as a consumable electrode is provided to the attaching tool. The tip body 4 is supported inside the attaching tool via an elastic supporting member 11. The elastic supporting member 11 supports the node N of the primary bending vibration mode in the free state of the tip body 4, and a piezoelectric device 8 for resonance of the tip body 4 in the primary bending vibration mode is provided to the tip body 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、消耗電極式溶接、特に消耗電極を使用したガスシールドアーク溶接に使用する消耗電極式溶接トーチに関する。   The present invention relates to a consumable electrode type welding torch used for consumable electrode type welding, particularly gas shielded arc welding using a consumable electrode.

従来より、消耗電極を用いたガスシールドアーク溶接において、消耗電極である溶接ワイヤを振動させることにより、スパッタの発生を抑制する方法が提案されている。その技術の一つとして、特許文献１や特許文献２がある。
特許文献１の溶接トーチは、溶接ワイヤを軸線方向に振動させることにより、溶滴を溶接ワイヤ先端から容易に離脱させ、大粒のスパッタの発生を抑制させるものである。通常の溶接下での溶滴移行回数（溶滴発生回数）は１秒間に５０回から１００回と言われており、この溶滴移行のタイミングに合わせた高周波数で振動させることで、確実な溶滴移行を行わせスパッタの発生等を抑制するものとなっている。高周波で振動させる機構としては、特許文献１の図２に示すように、溶接トーチ内にワイヤガイドを設け、ワイヤガイドに連結した駆動装置によりワイヤガイドを揺動させ、ワイヤを軸線方向に振動させるものとなっている。 Conventionally, in gas shielded arc welding using a consumable electrode, there has been proposed a method for suppressing the occurrence of spatter by vibrating a welding wire which is a consumable electrode. As one of the techniques, there are Patent Document 1 and Patent Document 2.
The welding torch disclosed in Patent Document 1 vibrates the welding wire in the axial direction so that the droplets are easily detached from the tip of the welding wire and suppress the generation of large spatters. It is said that the number of droplets transferred under normal welding (number of droplets generated) is 50 to 100 times per second, and it is ensured by vibrating at a high frequency in accordance with the timing of droplet transfer. The droplet transfer is performed to suppress the occurrence of spatter. As a mechanism for vibrating at a high frequency, as shown in FIG. 2 of Patent Document 1, a wire guide is provided in a welding torch, the wire guide is swung by a driving device connected to the wire guide, and the wire is vibrated in the axial direction. It has become a thing.

特許文献２に開示された溶接トーチは、トーチの先端に設けられているスプリングと、このスプリングを支点として揺動するように基端が当該スプリングに取付けられ且つ先端にはチップが取付けられているチップボディ（ワイヤ供給ノズル）と、このチップボディの対向側面に配設された一対の磁性金属と、磁性金属の外側にコイル中心が一致するように配設された一対の電磁コイルと、電磁コイルに電圧を印加する電圧発生装置とを備えている。この溶接トーチにおいて、一対の電磁コイルに交互に電圧を印加することによりチップボディがスプリングを支点として数十Ｈｚの高速振動を実現可能とし、適切な溶接ビードを形成するようにしている。   The welding torch disclosed in Patent Document 2 has a spring provided at the tip of the torch, a base end attached to the spring so as to swing around the spring, and a tip attached to the tip. A chip body (wire supply nozzle), a pair of magnetic metals arranged on opposite side surfaces of the chip body, a pair of electromagnetic coils arranged so that the coil centers coincide with the outside of the magnetic metal, and electromagnetic coils And a voltage generating device for applying a voltage. In this welding torch, by applying a voltage alternately to a pair of electromagnetic coils, the tip body can realize high-speed vibration of several tens of Hz with a spring as a fulcrum, and an appropriate welding bead is formed.

一方、本願出願人は、溶接ワイヤを５００Ｈｚ以上の高い振動数でワイヤ軸線直角方向に振動させれば、溶接ワイヤ先端での溶滴移行がスムーズに行われ、スパッタを低減できることを明らかにし、特許文献３として出願済みである。
特開２００３−１０９７０号公報 特許３１１７２８８号公報 特開２００７−１９０５６４号公報 On the other hand, the applicant of the present application clarified that if the welding wire is vibrated in the direction perpendicular to the wire axis at a high frequency of 500 Hz or more, the droplet transfer at the tip of the welding wire is smoothly performed, and spatter can be reduced. It has been filed as Reference 3.
JP 2003-10970 A Japanese Patent No. 3117288 JP 2007-190564 A

しかしながら、特許文献１の溶接トーチはトーチ内部にワイヤガイドを設けるといった構造上、トーチの小型化が難しい。また、トーチ内部で溶接ワイヤが屈曲した構造となる為に、溶接ワイヤの滑らかな送給が困難となる等、実使用に際しての構造上の難点が多い。
また、特許文献２の技術は、チップボディがその基部に配置されたスプリングを支点として、電磁力により強制的にチップボディ全体をワイヤ軸線直角方向に振動させる構造となっているため、当業者であれば、かかる溶接トーチにおいて、スパッタ抑制に効果的な５００Ｈｚ以上の高周波振動を安定して発現させることは難しいことは十分予見できる。 However, the welding torch of Patent Document 1 is difficult to reduce the size of the torch because of the structure in which a wire guide is provided inside the torch. Further, since the welding wire is bent inside the torch, there are many structural difficulties in actual use, such as difficulty in smoothly feeding the welding wire.
Further, the technique of Patent Document 2 has a structure in which the entire tip body is forcibly vibrated in the direction perpendicular to the wire axis by electromagnetic force with a spring disposed at the base of the tip body as a fulcrum. If so, it can be foreseen that it is difficult to stably generate high-frequency vibrations of 500 Hz or more effective for suppressing spatter in such a welding torch.

すなわち、通常考えられる溶接トーチや溶接ワイヤの現実的な質量、剛性では、５００Ｈｚ以上もの高い振動数の加振力を与えると、チップボディ根本のスプリングは支点として作用はせず、溶接トーチ自体にも振動が生じると共にチップボディ自体も曲げ変形を生じ、特許文献２で期待される振動形態とはならないことが十分予想される。さらに、チップボディのスプリング側（基端側）に加振力を与える構成では、チップ先端のワイヤはほとんど揺れず、基端側のみ振動するという自体も想定されるため、特許文献２の溶接トーチは、５００Ｈｚ以上の高周波振動を伴いながらの溶接には適用が困難であると思われる。   In other words, with the realistic mass and rigidity of a welding torch or welding wire that is normally considered, the tip body spring does not act as a fulcrum when an excitation force with a high frequency of 500 Hz or higher is applied, and the welding torch itself In addition, vibration is generated and the chip body itself is also bent and deformed, and it is sufficiently expected that the vibration form expected in Patent Document 2 is not achieved. Further, in the configuration in which an excitation force is applied to the spring side (base end side) of the tip body, it is assumed that the tip tip wire hardly sways and vibrates only at the base end side. Seems to be difficult to apply to welding with high frequency vibration of 500 Hz or more.

そこで、本発明は、上記問題点を鑑み、５００Ｈｚ以上の高い振動数で溶接ワイヤを振動させ溶滴移行を確実に行い、スパッタの発生を抑制できる消耗電極式溶接トーチを提供することを目的とする。   Accordingly, in view of the above problems, the present invention has an object to provide a consumable electrode type welding torch that can vibrate a welding wire at a high frequency of 500 Hz or more to reliably perform droplet transfer and suppress spattering. To do.

前記目的を達成するため、本発明においては以下の技術的手段を講じた。
すなわち、本発明に係る消耗電極式溶接トーチは、トーチ本体に中空状の取付ジグが設けられ、該取付ジグ内に消耗電極である溶接ワイヤを保持する長尺のチップボディが設けられているものであって、前記チップボディは、前記取付ジグの内部に弾性支持部材を介して支持され、該弾性支持部材は前記チップボディの自由状態における曲げ１次の振動モードの節部を支持しており、前記チップボディには、当該チップボディを曲げ１次の振動モードで共振させる圧電素子が設けられていることを特徴とする。 In order to achieve the above object, the present invention takes the following technical means.
That is, the consumable electrode type welding torch according to the present invention is provided with a hollow mounting jig in the torch body and a long tip body for holding a welding wire as a consumable electrode in the mounting jig. The tip body is supported inside the mounting jig via an elastic support member, and the elastic support member supports a bending primary vibration mode node in the free state of the tip body. The chip body is provided with a piezoelectric element that resonates the chip body in a primary vibration mode.

これによれば、圧電素子の加振により、チップボディが曲げ１次の振動モード形状で共振状態となり、チップ先端から突出している溶接ワイヤを５００Ｈｚ以上の高い振動数で軸直角方向に振動させることができるようになる。それにより、溶滴移行を確実に行い、スパッタの発生を抑制可能となる。
なお好ましくは、前記チップボディは、中心部に溶接ワイヤが貫通し、先端部に前記溶接ワイヤを保持するチップを有し、中途部には当該チップボディの径方向に突出状の鍔部材がチップボディの軸心方向に沿って一対備えられていて、前記圧電素子は、その伸縮方向が前記チップボディの軸心方向に沿うように前記一対の鍔部材の間に少なくとも１つ設けられている構成とするとよい。 According to this, the vibration of the piezoelectric element causes the chip body to be in a resonance state with a bending primary vibration mode shape, and the welding wire protruding from the tip of the chip is vibrated in a direction perpendicular to the axis at a high frequency of 500 Hz or more. Will be able to. As a result, the droplet transfer can be performed reliably and the occurrence of spatter can be suppressed.
Preferably, the tip body has a tip through which a welding wire penetrates at a central portion and holds the welding wire at a tip portion, and a hook-like member protruding in the radial direction of the tip body is provided at the middle portion. A pair of piezoelectric elements is provided along the axial direction of the body, and at least one of the piezoelectric elements is provided between the pair of flange members so that the expansion and contraction direction thereof is along the axial direction of the chip body. It is good to do.

こうすることで、溶接トーチのコンパクト化が図れるようになる。
さらに好ましくは、前記チップボディの曲げ１次モードの固有振動数の変化に前記圧電素子の伸縮の周波数を追従させるべく、圧電素子の駆動周波数を可変とする自動追尾手段を備えているとよい。
こうすることで、溶接時に本溶接トーチの温度変化により固有振動数が変化したとしても、常に共振状態を維持して効率的に溶接ワイヤを振動させることができる。
また好ましくは、前記鍔部材、圧電素子、チップボディの少なくともいずれか１つを冷却する冷却手段を有しているとよい。 By doing so, the welding torch can be made compact.
More preferably, an automatic tracking means for making the drive frequency of the piezoelectric element variable is provided so that the frequency of expansion and contraction of the piezoelectric element follows the change in the natural frequency of the bending primary mode of the chip body.
By doing so, even when the natural frequency changes due to the temperature change of the main welding torch during welding, the welding wire can be vibrated efficiently while always maintaining the resonance state.
Further preferably, it is preferable to have a cooling means for cooling at least one of the flange member, the piezoelectric element, and the chip body.

これにより、溶接中で高温となった溶接トーチにおいても、チップボディ、鍔部材、それに支持される圧電素子の温度上昇を確実に抑えることが可能となる。
特に好ましくは、前記冷却手段は、内部を冷却液が流通可能となっている管状部材と、冷却液が流通可能となっている中空部を備えた前記鍔部材とを有し、前記管状部材が鍔部材の中空部に連通しているとよい。 Thereby, even in a welding torch that becomes high temperature during welding, it is possible to reliably suppress the temperature rise of the tip body, the flange member, and the piezoelectric element supported by the tip body.
Particularly preferably, the cooling means includes a tubular member through which a coolant can flow and a flange member having a hollow portion through which the coolant can flow, the tubular member being It is good to communicate with the hollow part of the eaves member.

本発明に係る消耗電極式溶接トーチを用いることで、高い振動数で溶接ワイヤを振動させ溶滴移行を確実に行い、スパッタの発生を確実に抑制できる。   By using the consumable electrode type welding torch according to the present invention, it is possible to vibrate the welding wire at a high frequency to perform the droplet transfer reliably, and to reliably suppress the occurrence of spatter.

以下、本発明に係る消耗電極式溶接トーチの実施の形態を、図を基に説明する。
［第１実施形態］
図１には、消耗電極式溶接トーチ１の第１実施形態の正面断面図が示されている。
消耗電極式溶接トーチ１（以下、単に溶接トーチと呼ぶこともある）は、溶接ワイヤ２を保持すると共に溶接ワイヤ２に電流を供給するチップ３と、このチップ３が先端部に取り付けられた棒状長尺のチップボディ４を有している。チップボディ４及びチップ３の中心部を溶接ワイヤ２が貫通している。また、溶接トーチ１は、シールドガスを供給して溶接部を大気から保護するノズル５と、ノズル５やチップボディ４を保持すると共に、溶接ワイヤ２への給電や送給、冷却水の供給などのための装置が組み込まれたトーチボディ６（トーチ本体）を備えている。 Embodiments of a consumable electrode type welding torch according to the present invention will be described below with reference to the drawings.
[First Embodiment]
FIG. 1 shows a front cross-sectional view of a first embodiment of a consumable electrode type welding torch 1.
A consumable electrode type welding torch 1 (hereinafter sometimes simply referred to as a welding torch) includes a tip 3 for holding a welding wire 2 and supplying a current to the welding wire 2, and a rod-like shape having the tip 3 attached to the tip. A long chip body 4 is provided. The welding wire 2 passes through the center of the tip body 4 and the tip 3. In addition, the welding torch 1 holds a nozzle 5 for supplying a shielding gas to protect the welded portion from the atmosphere, the nozzle 5 and the tip body 4, and supplies and feeds power to the welding wire 2 and supplies cooling water. A torch body 6 (torch body) incorporating a device for the above is provided.

なお、図１においる右側すなわち溶接が行われる側を実際の装置での前側又は先端側と呼び、図１での左側を実際の装置での後側又は後端側と呼ぶものとする。図１における上下を実際の装置での上下と呼ぶ。
チップボディ４の後部側には、一対の円板状の鍔部材７Ａ，７Ｂが当該チップボディ４と同軸状に設けられている。鍔部材７Ａ，７Ｂはチップボディ４の径外方向に張り出すように設けられている。一方の鍔部材７Ａはチップボディ４の後端側と略面一に設けられ、他方の鍔部材７Ｂは一方の鍔部材７Ａと所定間隔だけ離れた前側に設けられるものとなっている。鍔部材７Ａ，７Ｂはチップボディ４と一体成形もしくはネジ構造とし、チップボディ４にしっかりと固定される構造とする。なお、鍔部材７Ａ，７Ｂをネジ式とする場合には、接着剤やダブルナットで固定する等、振動によりネジが緩まない様にすることが望ましい。 The right side in FIG. 1, that is, the side on which welding is performed, is referred to as the front side or the front end side in the actual apparatus, and the left side in FIG. 1 is referred to as the rear side or the rear end side in the actual apparatus. The upper and lower sides in FIG. 1 are called the upper and lower sides in an actual apparatus.
On the rear side of the chip body 4, a pair of disc-shaped flange members 7 </ b> A and 7 </ b> B are provided coaxially with the chip body 4. The flange members 7 </ b> A and 7 </ b> B are provided so as to project outward in the radial direction of the chip body 4. One flange member 7A is provided substantially flush with the rear end side of the chip body 4, and the other flange member 7B is provided on the front side separated from the one flange member 7A by a predetermined distance. The flange members 7A and 7B are formed integrally with the chip body 4 or have a screw structure, and are firmly fixed to the chip body 4. When the flange members 7A and 7B are screw type, it is desirable to prevent the screws from loosening due to vibration, such as fixing with an adhesive or a double nut.

一対の鍔部材７Ａ，７Ｂ間であって鍔部材７Ａ，７Ｂの周縁側には圧電素子８が設けられている。圧電素子８は、積層形の圧電素子８であって印加電圧の周波数に連動し長手方向に伸縮する。その伸縮方向がチップボディ４の前後方向（チップボディ４に沿った方向)となるように１つ以上設けられている。本実施形態の場合、圧電素子８は鍔部材７Ａ，７Ｂの上部側に１つ設けられているが、下側に設けられていてもよく、上下に一対設けられていてもよい。上下一対の場合は両圧電素子８，８には逆位相の変動電圧を与えるとよい。圧電素子８を上下２個配置することで、単独配置に比して小型の圧電素子８を利用でき、装置全体をコンパクトにできる。   A piezoelectric element 8 is provided between the pair of flange members 7A and 7B and on the peripheral side of the flange members 7A and 7B. The piezoelectric element 8 is a laminated piezoelectric element 8 that expands and contracts in the longitudinal direction in conjunction with the frequency of the applied voltage. One or more expansion / contraction directions are provided so as to be the front-rear direction of the chip body 4 (direction along the chip body 4). In the case of the present embodiment, one piezoelectric element 8 is provided on the upper side of the flange members 7A and 7B, but may be provided on the lower side or a pair of upper and lower sides. In the case of a pair of upper and lower sides, it is preferable to give a fluctuation voltage of opposite phase to both piezoelectric elements 8 and 8. By arranging two piezoelectric elements 8 at the top and bottom, the piezoelectric element 8 that is smaller than the single arrangement can be used, and the entire apparatus can be made compact.

圧電素子８と鍔部材７Ａ，７Ｂとの間には、溶接時の圧電素子８の温度上昇の抑制を目的として断熱材９を設けている。また、前後一対の鍔部材７Ａ，７Ｂで圧電素子８に圧縮荷重を与えた状態で固定している。断熱材９は、圧電素子８の伸縮を鍔部材７Ａ，７Ｂに確実に伝えるために、セラミック等の剛性の高い部材を用いるとよい。鍔部材７Ａ，７Ｂ自体を剛性や強度が十分に高い断熱材で製作することも可能である。
なお、本実施形態のチップボディ４に関しては、自由状態（フリー状態）での曲げ１次モードの振動が図２の如くなるように、チップボディ４及び鍔部材７Ａ，７Ｂの寸法、形状、重量等が選択されている。振動モードの算出、それに基づく各部材の寸法などの設計は、梁の振動理論や既存の振動モデル等を用いるとよい。 A heat insulating material 9 is provided between the piezoelectric element 8 and the flange members 7A and 7B for the purpose of suppressing the temperature rise of the piezoelectric element 8 during welding. Further, the piezoelectric element 8 is fixed in a state in which a compressive load is applied thereto by a pair of front and rear flange members 7A and 7B. As the heat insulating material 9, in order to reliably transmit the expansion and contraction of the piezoelectric element 8 to the flange members 7A and 7B, a highly rigid member such as ceramic may be used. It is also possible to manufacture the flange members 7A and 7B themselves with a heat insulating material having sufficiently high rigidity and strength.
With respect to the chip body 4 of the present embodiment, the dimensions, shapes, and weights of the chip body 4 and the flange members 7A and 7B are such that the vibration of the bending primary mode in the free state (free state) is as shown in FIG. Etc. are selected. The calculation of the vibration mode and the design of the dimensions of each member based on the calculation of the vibration mode may be performed using a beam vibration theory or an existing vibration model.

図１に示すように、チップボディ４においては、一対の鍔部材７Ａ，７Ｂ間の略中央、及びチップ３の後側が振動の節（節部Ｎ）となる。一対の鍔部材７Ａ，７Ｂ間略中央に現れる節部Ｎの位置において、チップボディ４をトーチボディ６の先端に設けられた筒状ジグ１０（取付ジグ）と連結するようにしている。具体的には左右方向に延びる弾性支持部材１１（長方形の平板）を介して取り付ける。弾性支持部材１１にステンレスや鋼、銅、アルミなどの金属材料を利用することにより、筒状ジグ１０からチップボディ４に溶接用の電流を供給できる。   As shown in FIG. 1, in the chip body 4, the approximate center between the pair of flange members 7A and 7B and the rear side of the chip 3 are vibration nodes (nodes N). The tip body 4 is connected to a cylindrical jig 10 (attachment jig) provided at the tip of the torch body 6 at the position of the node N appearing at the approximate center between the pair of flange members 7A and 7B. Specifically, it attaches via the elastic support member 11 (rectangular flat plate) extended in the left-right direction. By using a metal material such as stainless steel, steel, copper, or aluminum for the elastic support member 11, a welding current can be supplied from the cylindrical jig 10 to the tip body 4.

図２に示されている如く、チップボディ４の後端側は先端側に比べて質量が大きくなるために、その振動振幅が小さくなる。一方、溶接ワイヤ２の先端においては、節部Ｎから離れた位置かつ弾性変形の効果からより大きな振動が発現する。このようなチップボディ４の曲げ１次モードを利用することにより、圧電素子８自体で発生する小振幅の振動で溶接ワイヤ２先端での大振幅の振動（溶接ワイヤ２先端の振幅：約０．１ｍｍ）を実現している。
ところで、曲げ１次モードの節部Ｎにおいては、水平方向の変位は小さいものの回転方向の変位（図２の×に対し紙面垂直な軸心周りの捩れ変位）は比較的大きく生じる。そこで、かかる回転変位を拘束しないように、弾性支持部材１１としては「ねじれ剛性」が低くなる平板を利用している。しかしながら、弾性支持部材１１の剛性があまりにも低いとチップボディ４にふら付きが生じるため、適度な堅さ（剛性）が必要である。目安としては、弾性支持部材１１の変形によるチップボディ４の固有振動数が、チップボディ４単体の固有振動数の１／２〜１／３より低く、かつ、チップボディ４のふら付きが問題とならない剛性とする。なお、本発明では５００Ｈｚ以上の振動数を目標としている為、この条件は容易に実現できる。 As shown in FIG. 2, the rear end side of the chip body 4 is larger in mass than the front end side, and therefore the vibration amplitude is reduced. On the other hand, at the tip of the welding wire 2, a greater vibration appears due to the effect of elastic deformation at a position away from the node N. By utilizing such a bending primary mode of the tip body 4, a small amplitude vibration generated in the piezoelectric element 8 itself causes a large amplitude vibration at the tip of the welding wire 2 (amplitude at the tip of the welding wire 2: about 0. 0). 1 mm).
By the way, in the node N of the bending primary mode, although the displacement in the horizontal direction is small, the displacement in the rotational direction (torsional displacement around the axis perpendicular to the plane of the paper in FIG. 2) is relatively large. Therefore, in order not to constrain such rotational displacement, a flat plate having low “torsional rigidity” is used as the elastic support member 11. However, if the rigidity of the elastic support member 11 is too low, the chip body 4 is wobbling, and thus appropriate rigidity (rigidity) is required. As a guideline, the natural frequency of the chip body 4 due to the deformation of the elastic support member 11 is lower than 1/2 to 1/3 of the natural frequency of the chip body 4 alone, and wobbling of the chip body 4 is a problem. Rigid rigidity is not allowed. In the present invention, since the target frequency is 500 Hz or more, this condition can be easily realized.

なお、節部Ｎの位置と弾性支持部材１１の取り付け位置とを厳密に一致させる必要はない。なぜならば、取り付け位置が若干ずれていても、弾性支持部材１１が曲げ変形をするためチップボディ４の回転変位の拘束が起こらず、曲げ１次モードへの影響は生じないからである。
図１に示される如く、チップボディ４が弾性支持部材１１を介して内部に取り付けられている筒状ジグ１０に関しては、その後端側が溶接トーチ１に取り付けられ、先端側には漏斗形状のインシュレータ１２が設けられている。このインシュレータ１２の先端にはチップ３が内部貫通状となるようにノズル５が設けられている。 The position of the node N and the attachment position of the elastic support member 11 do not have to be strictly matched. This is because even if the mounting position is slightly deviated, the elastic support member 11 is bent and deformed, so that the rotational displacement of the tip body 4 does not occur and the bending primary mode is not affected.
As shown in FIG. 1, with respect to the cylindrical jig 10 in which the tip body 4 is attached through the elastic support member 11, the rear end side is attached to the welding torch 1, and the funnel-shaped insulator 12 is attached to the front end side. Is provided. A nozzle 5 is provided at the tip of the insulator 12 so that the tip 3 has an internal through shape.

インシュレータ１２には樹脂やセラミック材料が用いられ、ノズル５を固定すると共にノズル５自体の電気的絶縁を行う。筒状ジグ１０との結合部が絶縁構造となっていれば、インシュレータ１２は金属材料で構成されていてもよい。
なお、トーチボディ６からノズル５までの構造は、シールドガスを溶接部へ送る役目も兼ねている為に密閉配管状とする。すなわち、トーチボディ６側から供給されたＣＯ2等のシールドガスは、筒状ジグ１０→インシュレータ１２→ノズル５を通ってノズル５先端から溶接ワイヤ２を取り囲むように噴出される。筒状ジグ１０内を通るシールドガスは圧電素子８や鍔部材７Ａ，７Ｂを冷却する効果も有する。シールドガスをトーチボディ６→チップボディ４の内部→チップボディ４の側面に設けた数箇所の穴（図示せず）→インシュレータ１２→ノズル５と供給するようにしてもよい。 Resins and ceramic materials are used for the insulator 12 to fix the nozzle 5 and to electrically insulate the nozzle 5 itself. The insulator 12 may be made of a metal material as long as the connecting portion with the cylindrical jig 10 has an insulating structure.
In addition, since the structure from the torch body 6 to the nozzle 5 serves also as the role which sends shield gas to a welding part, it is set as sealed piping shape. That is, the shielding gas such as CO 2 supplied from the torch body 6 side is jetted so as to surround the welding wire 2 from the tip of the nozzle 5 through the cylindrical jig 10 → the insulator 12 → the nozzle 5. The shielding gas passing through the cylindrical jig 10 also has an effect of cooling the piezoelectric element 8 and the flange members 7A and 7B. The shield gas may be supplied as follows: torch body 6 → inside of chip body 4 → several holes (not shown) provided on the side surface of chip body 4 → insulator 12 → nozzle 5.

上述した溶接トーチ１を使用するに際しては、まず、筒状ジグ１０内に配備されたチップボディ４に溶接ワイヤ２を挿入・貫通させる。その後、チップボディ４の先端にチップ３をしっかりと締結する。その後、チップ３を介して溶接ワイヤ２に電流を供給し溶接を行うようにする。その際、筒状ジグ１０内にトーチボディ６側からＣＯ2ガスなどのシールドガスを供給するようにする。これにより、溶接部近傍において酸素が遮断されたガスシールド状態となる。
溶接ワイヤ２の振動数は、圧電素子８及び圧電素子８を取り付ける為の鍔部材７Ａ，７Ｂを含めたチップボディ系Ｓの固有振動数により決まる。チップボディ系Ｓの固有振動数は、チップボディ４の長さや径、鍔部材７Ａ，７Ｂの質量等を変更することで容易に調整でき、５００Ｈｚ以上の高い固有振動数を持たせることが可能である。 When using the welding torch 1 described above, first, the welding wire 2 is inserted and penetrated into the tip body 4 provided in the cylindrical jig 10. Thereafter, the tip 3 is firmly fastened to the tip of the tip body 4. Thereafter, current is supplied to the welding wire 2 through the tip 3 to perform welding. At that time, shield gas such as CO 2 gas is supplied into the cylindrical jig 10 from the torch body 6 side. Thereby, it will be in the gas shield state from which oxygen was interrupted | blocked in the welding part vicinity.
The frequency of the welding wire 2 is determined by the natural frequency of the tip body system S including the piezoelectric element 8 and the flange members 7A and 7B for attaching the piezoelectric element 8. The natural frequency of the chip body system S can be easily adjusted by changing the length and diameter of the chip body 4, the mass of the flange members 7A and 7B, etc., and can have a high natural frequency of 500 Hz or more. is there.

溶接時には、鍔部材７Ａ，７Ｂ間に配備された圧電素子８に、チップボディ系Ｓの固有振動数と同じ周波数を有する駆動電圧を印加する。すると、チップ３とチップボディ４とは一体で振動し圧電素子８により共振状態となる。したがって、チップボディ系Ｓの固有振動数及び圧電素子８の駆動電圧を調整することにより、高周波で溶接ワイヤ２の先端を軸心直角方向に振動させ溶滴移行を確実に行い、スパッタの発生を抑制できることとなる。
チップボディ４は、ガタの無い一体型構造とされているため、振動の減衰が小さく大きな共振倍率が得られる。加えて、曲げ１次モードの節部Ｎが弾性支持されているため、チップボディ系Ｓの固有振動特性はほとんど変化しておらず、弾性支持部材１１（支持点）からトーチボディ６ヘの振動エネルギ流出が最小限に抑えられるものとなっている。 At the time of welding, a driving voltage having the same frequency as the natural frequency of the tip body system S is applied to the piezoelectric element 8 disposed between the flange members 7A and 7B. Then, the chip 3 and the chip body 4 vibrate together and are brought into a resonance state by the piezoelectric element 8. Therefore, by adjusting the natural frequency of the chip body system S and the driving voltage of the piezoelectric element 8, the tip of the welding wire 2 is vibrated at a high frequency in the direction perpendicular to the axial center, and the droplet transfer is surely performed, and spatter is generated. It can be suppressed.
Since the chip body 4 has an integrated structure with no play, the vibration attenuation is small and a large resonance magnification can be obtained. In addition, since the node N of the bending primary mode is elastically supported, the natural vibration characteristics of the tip body system S hardly change, and the vibration from the elastic support member 11 (support point) to the torch body 6 Energy outflow is minimized.

なお、弾性支持部材１１の剛性を低くすれば(柔支持すれば)、チップボディ４の振動の大きな箇所（腹部）の支持でも同様の効果(固有振動数の変化小、エネルギ流出小)が得られるが、柔支持に伴い拘束力が弱い為に、チップボディ４が下方に傾いたり溶接トーチ１を移動させる際にふらついたりすることにより、ワイヤ先端の位置決め精度が低下する。そのため、節部Ｎでの支持が必要不可欠である。
以上述べた溶接トーチ１の実施形態の別例として、図３に示すようなものも考えられる。すなわち、一対の鍔部材７Ａ，７Ｂを側面視で矩形状の凸状部材としている。この凸状の鍔部材７Ａ，７Ｂをチップボディ４と一体成形や溶接により完全に固定した上で、鍔部材７Ａに設けた押しネジ１３を利用して、鍔部材７Ａ，７Ｂ間に圧電素子８を押圧状態で設置している。
［第２実施形態］
次に本発明に係る消耗電極式溶接トーチの第２実施形態について述べる。 If the rigidity of the elastic support member 11 is lowered (if it is softly supported), the same effect (small change in natural frequency, small energy outflow) can be obtained even when the tip body 4 is supported at a portion (abdomen) where vibration is large. However, since the restraining force is weak with soft support, the tip body 4 tilts downward or fluctuates when the welding torch 1 is moved, so that the positioning accuracy of the wire tip is lowered. Therefore, support at the node N is indispensable.
As another example of the embodiment of the welding torch 1 described above, the one shown in FIG. 3 is also conceivable. That is, the pair of eaves members 7A and 7B are rectangular convex members as viewed from the side. The convex scissors members 7A and 7B are completely fixed to the chip body 4 by integral molding or welding, and the piezoelectric element 8 is interposed between the scissors members 7A and 7B by using the push screw 13 provided on the scissors member 7A. Is installed in a pressed state.
[Second Embodiment]
Next, a second embodiment of the consumable electrode type welding torch according to the present invention will be described.

図４，図５に示すように、第２実施形態が第１実施形態と大きく異なる点は、チップボディ４の曲げ１次モードの固有振動数の変化に圧電素子８の伸縮の周波数を追従させるべく、圧電素子８が当該圧電素子８の駆動周波数を可変とする自動追尾手段２０に接続されていることにある。他の構成は第１実施形態と略同一である。
チップ３およびチップボディ４は溶接時には温度が上がり、それらを構成する金属のヤング率の低下などによりチップボディ系Ｓの固有振動数が変化する。固有振動数からある程度離れた周波数で圧電素子８を加振している場合は、温度変化等に伴う固有振動数の変化の影響は大きく無いが、共振状態で加振を行う場合は、固有振動数の変化に応じて溶接ワイヤ２の振動振幅は大きく変化する。チップボディ系Ｓの固有振動数の変化に応じて、圧電素子８の駆動周波数を変化させる自動追尾を行うことにより、かかる状況に柔軟に対応することができる。 As shown in FIGS. 4 and 5, the second embodiment is greatly different from the first embodiment in that the frequency of expansion and contraction of the piezoelectric element 8 follows the change in the natural frequency of the bending primary mode of the chip body 4. Therefore, the piezoelectric element 8 is connected to the automatic tracking means 20 that makes the drive frequency of the piezoelectric element 8 variable. Other configurations are substantially the same as those of the first embodiment.
The temperature of the tip 3 and the tip body 4 rises during welding, and the natural frequency of the tip body system S changes due to a decrease in the Young's modulus of the metal constituting them. When the piezoelectric element 8 is vibrated at a frequency somewhat away from the natural frequency, the influence of the change in the natural frequency due to a temperature change or the like is not significant, but when vibrating in a resonance state, the natural vibration The vibration amplitude of the welding wire 2 changes greatly according to the change in the number. By performing automatic tracking that changes the drive frequency of the piezoelectric element 8 in accordance with the change in the natural frequency of the chip body system S, such a situation can be flexibly dealt with.

図４は、本実施形態の溶接トーチ１を示したものである。
溶接トーチ１に設けられた鍔部材７Ａには、振動周波数等を検出可能な振動センサ２１が設けられていて、実測された周波数は自動追尾手段２０へ送られるようになっている。自動追尾手段２０は、制御回路２２、周波数発生器２３、圧電素子駆動アンプ２４から構成されている。
自動追尾手段２０の制御回路２２に送られた「チップボディ４の振動周波数の実測信号」は、圧電素子駆動アンプ２４の出力信号と比較され、それらの位相差が一定になるように共振周波数が算出される（ＰＬＬ制御）。算出された共振周波数は周波数発生器２３に送られ、かかる共振周波数を有する正弦波が発生される。この正弦波は圧電素子駆動アンプ２４へ送られて増幅され出力信号となり、圧電素子８を駆動するようになる。 FIG. 4 shows the welding torch 1 of the present embodiment.
The saddle member 7A provided on the welding torch 1 is provided with a vibration sensor 21 capable of detecting a vibration frequency and the like, and the actually measured frequency is sent to the automatic tracking means 20. The automatic tracking means 20 includes a control circuit 22, a frequency generator 23, and a piezoelectric element drive amplifier 24.
The “measurement signal of the vibration frequency of the chip body 4” sent to the control circuit 22 of the automatic tracking means 20 is compared with the output signal of the piezoelectric element drive amplifier 24, and the resonance frequency is set so that the phase difference between them is constant. Calculated (PLL control). The calculated resonance frequency is sent to the frequency generator 23, and a sine wave having the resonance frequency is generated. This sine wave is sent to the piezoelectric element drive amplifier 24 and amplified to become an output signal, which drives the piezoelectric element 8.

このようにすることで、チップ３およびチップボディ４の温度が変化したとしても、常に圧電素子８はチップボディ４を共振状態とすることができ、溶接ワイヤ２を大きく振動させ溶滴移行を確実に行うことができる。
なお、振動センサ２１は、チップボディ４の節部Ｎ以外であればどの位置に取り付けてもよい。
図５は、本実施形態にかかる別の溶接トーチ１を示したものである。
本実施形態のチップボディ４には、振動センサ２１が設けられておらず、制御回路２２へは、圧電素子８から発生する電流情報（電流値）が入力されるようになっている。共振時には、回路に流れる電流の位相が電圧の位相と一致することが明らかとなっているため、自動追尾手段２０の制御回路２２に送られた「圧電素子８の電流信号」は、圧電素子駆動アンプ２４の電圧信号と比較され、それらの位相差が一致するように共振周波数が算出される（ＰＬＬ制御）。算出された共振周波数は周波数発生器２３に送られ、かかる共振周波数を有する正弦波が発生される。この正弦波は圧電素子駆動アンプ２４へ送られて増幅され出力信号となり、圧電素子８を駆動するようになる。 By doing so, even if the temperature of the tip 3 and the tip body 4 changes, the piezoelectric element 8 can always bring the tip body 4 into a resonance state, and the welding wire 2 is vibrated greatly to ensure the droplet transfer. Can be done.
The vibration sensor 21 may be attached at any position other than the node portion N of the chip body 4.
FIG. 5 shows another welding torch 1 according to the present embodiment.
The chip body 4 of the present embodiment is not provided with the vibration sensor 21, and current information (current value) generated from the piezoelectric element 8 is input to the control circuit 22. Since it is clear that the phase of the current flowing in the circuit coincides with the phase of the voltage at the time of resonance, the “current signal of the piezoelectric element 8” sent to the control circuit 22 of the automatic tracking means 20 is a piezoelectric element drive. It is compared with the voltage signal of the amplifier 24, and the resonance frequency is calculated so that the phase difference between them matches (PLL control). The calculated resonance frequency is sent to the frequency generator 23, and a sine wave having the resonance frequency is generated. This sine wave is sent to the piezoelectric element drive amplifier 24 and amplified to become an output signal, which drives the piezoelectric element 8.

これにより、チップ３およびチップボディ４の温度が変化したとしても、常に圧電素子８はチップボディ４の共振状態とすることができ、溶接ワイヤ２を大きく振動させ溶滴移行を確実に行うことができる。
なお、共振時には、回路の電流値が最大となり、***振時に電流値が最小となることも判っているため、圧電素子８の電流値を測定して最大または最小となるように共振周波数を制御してもよい。
［第３実施形態］
次に本発明に係る消耗電極式溶接トーチ１の第３実施形態について述べる。 Thereby, even if the temperature of the chip 3 and the chip body 4 changes, the piezoelectric element 8 can always be in the resonance state of the chip body 4, and the welding wire 2 can be vibrated greatly and the droplet transfer can be reliably performed. it can.
Since it is known that the current value of the circuit becomes maximum at the time of resonance and the current value becomes minimum at the time of anti-resonance, the current value of the piezoelectric element 8 is measured and the resonance frequency is controlled to be maximum or minimum. May be.
[Third Embodiment]
Next, a third embodiment of the consumable electrode type welding torch 1 according to the present invention will be described.

第３実施形態が第１実施形態と大きく異なる点は、チップボディ４、鍔部材７Ａ，７Ｂ、圧電素子８を冷却する冷却手段３０を有していることにある。他の構成は第１実施形態と略同一である。
図６，図７に示すように、前記冷却手段３０は、内部を冷却液が流通可能となっている管状部材（供給管３２、排出管３３）と、冷却液（冷却水）が流通可能となっている中空部３１を備えた鍔部材７Ａ，７Ｂとを有し、前記管状部材３２，３３が鍔部材７Ａ，７Ｂの中空部３１に連通する構成となっている。 The third embodiment differs greatly from the first embodiment in that it has a cooling means 30 for cooling the chip body 4, the flange members 7 </ b> A and 7 </ b> B, and the piezoelectric element 8. Other configurations are substantially the same as those of the first embodiment.
As shown in FIGS. 6 and 7, the cooling means 30 has a tubular member (a supply pipe 32 and a discharge pipe 33) through which a cooling liquid can flow and a cooling liquid (cooling water) can flow therethrough. The tubular members 32 and 33 are configured to communicate with the hollow portions 31 of the flange members 7A and 7B.

図６は、前側の鍔部材７Ｂのみ水冷する構成となっている。
すなわち、チップ３側に近い鍔部材７Ｂの内部に中空部３１が形成されている。この中空部３１には、鍔部材７Ｂの側面側から、冷却水を供給する供給管３２の先端が連通していて、冷却水を鍔部材７Ｂの中空部３１へ導くものとなっている。一方、前側の鍔部材７Ｂの側面であって、供給管３２が連接する位置とは上下（又は左右）反対位置側には、中空部３１内の冷却水を外部に排出する排出管３３が設けられている。中空部３１内に供給された冷却水は、かかる排出管３３を通ってトーチボディ６側へ戻ってゆくようになっている。 In FIG. 6, only the front side flange member 7B is water cooled.
That is, the hollow portion 31 is formed inside the flange member 7B close to the chip 3 side. The hollow portion 31 communicates with the tip of a supply pipe 32 for supplying cooling water from the side surface side of the flange member 7B, and guides the cooling water to the hollow portion 31 of the flange member 7B. On the other hand, a discharge pipe 33 for discharging the cooling water in the hollow portion 31 to the outside is provided on the side surface of the front flange member 7B on the opposite side of the position where the supply pipe 32 is connected vertically (or left and right). It has been. The cooling water supplied into the hollow portion 31 returns to the torch body 6 side through the discharge pipe 33.

なお、供給管３２、排出管３３とも筒状ジグ１０を貫通する形で当該筒状ジグ１０に固定されているため、チップボディ４を支持する弾性支持部材１１の役目を兼ねる。特に、図６に示すように、チップボディ４の曲げの１次モードの節部Ｎ近傍で直角に曲がる構造（節部Ｎと屈曲部３４とが対応する構造）としている。こうすることで、配管自体の捩れ剛性は比較的高いものの、鍔部材７Ｂの側面〜屈曲部３４に亘る配管３２，３３の曲げ変形（片持ち状態にある配管の曲げ変形）により、「配管３２，３３の捩れ剛性に伴う拘束の影響」を軽減でき、チップボディ４は振動的にはフリーに近い状態では筒状ジグ１０に支持されるものとなる。   Since the supply pipe 32 and the discharge pipe 33 are fixed to the cylindrical jig 10 so as to penetrate the cylindrical jig 10, they also serve as the elastic support member 11 that supports the chip body 4. In particular, as shown in FIG. 6, the chip body 4 is bent at a right angle in the vicinity of the node N in the primary mode of bending (a structure in which the node N and the bent portion 34 correspond). In this way, although the torsional rigidity of the pipe itself is relatively high, the “pipe 32” is caused by bending deformation of the pipes 32 and 33 (bending deformation of the pipe in a cantilever state) extending from the side surface of the flange member 7B to the bent portion 34. , 33 can be reduced, and the tip body 4 is supported by the cylindrical jig 10 in a vibration-free state.

このように、溶接部に近い前側の鍔部材７Ｂを冷却することにより、圧電素子８に溶接による熱はほとんど伝達しない状況下となり、圧電素子８と鍔部材７Ｂとの間に配備された断熱材９を不要とすることも可能となる。鍔部材７Ｂの冷却によりチップボディ４自体も冷却されトーチボディ６側への伝熱も軽減されるようになる。
図７は、前後一対の鍔部材７Ａ，７Ｂの両方を水冷する構成となっている。
すなわち、両鍔部材７Ａ，７Ｂの内部に中空部３１が形成されている。一方、筒状ジグ１０の側面を貫通し内部に入り込むように設けられた供給管３２は、途中で二股に分かれ、各先端部が両鍔部材７Ａ，７Ｂの側面につながっており、それぞれの鍔部材７Ａ，７Ｂの中空部３１に連通していて、トーチボディ６側から供給された冷却水を当該中空部３１へ導入可能となっている。 In this way, by cooling the front flange member 7B close to the welded portion, the heat generated by the welding is hardly transmitted to the piezoelectric element 8, and a heat insulating material provided between the piezoelectric element 8 and the flange member 7B. 9 can be eliminated. By cooling the flange member 7B, the chip body 4 itself is also cooled, and heat transfer to the torch body 6 side is reduced.
FIG. 7 shows a configuration in which both the pair of front and rear flange members 7A and 7B are water-cooled.
That is, the hollow part 31 is formed inside the both flange members 7A and 7B. On the other hand, the supply pipe 32 provided so as to penetrate the side surface of the cylindrical jig 10 and enter the inside thereof is divided into two parts in the middle, and the respective leading end portions are connected to the side surfaces of the two flange members 7A and 7B. The cooling water supplied from the torch body 6 side can be introduced into the hollow portion 31 in communication with the hollow portion 31 of the members 7A and 7B.

鍔部材７Ａ，７Ｂの側面であって、供給管３２が連接する位置とは上下（又は左右）反対位置側には、中空部３１内の冷却水を外部に排出する排出管３３が設けられている。この排出管３３は途中で一本の排出管３３となり（すなわち、排出管３３も二股形状である）、筒状ジグ１０の側面を貫通し外部に導出される構造となっている。中空部３１内に供給された冷却水は、かかる排出管３３を通って再びトーチボディ６側へ戻ってゆく。
なお、二股に分かれる前の供給管３２、二股に分かれる前の排出管３３とも筒状ジグ１０を貫通する形で当該筒状ジグ１０に固定されていため、チップボディ４を支持する弾性支持部材１１の役目を兼ねる。前述した「前側の鍔部材７Ｂのみ水冷する構成」と同様に、チップボディ４の曲げの１次モードの節部Ｎ近傍で直角に曲がる構造（節部Ｎと屈曲部３４とが対応する構造）としている。ゆえに、チップボディ４は振動的にはフリーに近い状態では筒状ジグ１０に支持されるものとなる。 A discharge pipe 33 for discharging the cooling water in the hollow portion 31 to the outside is provided on the side of the flange members 7A and 7B on the side opposite to the position where the supply pipe 32 is connected vertically (or left and right). Yes. The discharge pipe 33 becomes a single discharge pipe 33 in the middle (that is, the discharge pipe 33 is also bifurcated), and has a structure that penetrates the side surface of the cylindrical jig 10 and is led out to the outside. The cooling water supplied into the hollow portion 31 returns to the torch body 6 side again through the discharge pipe 33.
Since the supply pipe 32 before bifurcating and the discharge pipe 33 before bifurcating are fixed to the cylindrical jig 10 so as to penetrate the cylindrical jig 10, the elastic support member 11 that supports the chip body 4. Also serves as a role. Similar to the above-described “configuration in which only the front flange member 7B is water-cooled”, a structure that bends at right angles in the vicinity of the node N in the primary mode of bending of the chip body 4 (a structure in which the node N and the bent portion 34 correspond). It is said. Therefore, the tip body 4 is supported by the cylindrical jig 10 in a vibrationally free state.

このように、両鍔部材７Ａ，７Ｂを冷却することにより、圧電素子８には溶接に起因する熱はほとんど伝達しない状況となり、断熱材９を不要とすることも可能となる。鍔部材７Ａ，７Ｂの冷却によりチップボディ４自体も冷却されトーチボディ６側への伝熱も軽減される。
総括するならば、圧電素子８は鍔部材７Ａ，７Ｂを介してチップボディ４にしっかりと固定されているために溶接時の熱が伝わる。一般に、圧電素子８の許容温度は８５℃から１５０℃度程度（圧電素子製造メーカーのカタログから）であり、溶接時にはチップボディ４の温度はこの圧電素子８の許容温度以上になる。 In this way, by cooling both flange members 7A and 7B, the piezoelectric element 8 is hardly transmitted with heat due to welding, and the heat insulating material 9 can be dispensed with. By cooling the flange members 7A and 7B, the chip body 4 itself is also cooled, and heat transfer to the torch body 6 side is also reduced.
In summary, since the piezoelectric element 8 is firmly fixed to the chip body 4 through the flange members 7A and 7B, heat during welding is transmitted. Generally, the allowable temperature of the piezoelectric element 8 is about 85 ° C. to 150 ° C. (from the catalog of the piezoelectric element manufacturer), and the temperature of the tip body 4 becomes equal to or higher than the allowable temperature of the piezoelectric element 8 during welding.

圧電素子８を取り付ける鍔部材７Ａ，７Ｂに断熱材９を設けると共に、シールドガスによる空冷効果により、圧電素子８の温度上昇はある程度抑制できるが、長時間の溶接での温度上昇により圧電素子８が損傷する可能性がある。しかしながら、溶接トーチ１に冷却手段３０を設けることで、確実に圧電素子８の温度上昇を抑制できる。さらに、供給管３２及び排出管３３をチップボディ４を支持する弾性支持部材１１とすることで、部品点数の削減、コストダウンを図ることが可能となる。
以上、本発明に係る消耗電極式溶接トーチは、上述した実施の形態に限定されるものではない。 Although the heat insulating material 9 is provided on the flange members 7A and 7B to which the piezoelectric element 8 is attached, the temperature rise of the piezoelectric element 8 can be suppressed to some extent due to the air cooling effect by the shielding gas. Possible damage. However, by providing the cooling means 30 in the welding torch 1, the temperature rise of the piezoelectric element 8 can be reliably suppressed. Furthermore, by using the supply pipe 32 and the discharge pipe 33 as the elastic support member 11 that supports the chip body 4, it is possible to reduce the number of parts and reduce the cost.
As described above, the consumable electrode type welding torch according to the present invention is not limited to the above-described embodiment.

（ａ）は第１実施形態の正面断面図、（ｂ）は同平面断面図、（ｃ）は（ｂ）におけるＡ−Ａ線断面図である。(A) is front sectional drawing of 1st Embodiment, (b) is the same plane sectional drawing, (c) is the sectional view on the AA line in (b). チップボディの振動状態（曲げ１次モード）を示した図である。It is the figure which showed the vibration state (bending primary mode) of the chip body. （ａ）は第１実施形態の別例の正面断面図、（ｂ）同側面断面図である。(A) is front sectional drawing of another example of 1st Embodiment, (b) It is the side sectional drawing. 第２実施形態を示す図である。It is a figure which shows 2nd Embodiment. 第２実施形態の別例を示す図である。It is a figure which shows another example of 2nd Embodiment. 第３実施形態の正面断面図である。It is front sectional drawing of 3rd Embodiment. 第３実施形態の別例の正面断面図である。It is front sectional drawing of another example of 3rd Embodiment.

符号の説明Explanation of symbols

１ 消耗電極式溶接トーチ
２ 溶接ワイヤ
３ チップ
４ チップボディ
５ ノズル
６ トーチボディ（トーチ本体）
７Ａ 鍔部材
７Ｂ 鍔部材
８ 圧電素子
９ 断熱材
１０ 筒状ジグ（取付ジグ）
１１ 弾性支持部材
１２ インシュレータ
１３ 押しネジ
２０ 自動追尾手段
２１ 振動センサ
２２ 制御回路
２３ 周波数発生器
２４ 圧電素子駆動アンプ
３０ 冷却手段
３１ 中空部
３２ 供給管
３３ 排出管
３４ 屈曲部
Ｎ 節部
Ｓ チップボディ系 1 Consumable Electrode Welding Torch 2 Welding Wire 3 Tip 4 Tip Body 5 Nozzle 6 Torch Body (Torch Body)
7A 鍔 member 7B 鍔 member 8 Piezoelectric element 9 Heat insulating material 10 Cylindrical jig (mounting jig)
DESCRIPTION OF SYMBOLS 11 Elastic support member 12 Insulator 13 Push screw 20 Automatic tracking means 21 Vibration sensor 22 Control circuit 23 Frequency generator 24 Piezoelectric element drive amplifier 30 Cooling means 31 Hollow part 32 Supply pipe 33 Discharge pipe 34 Bending part N Node part S Chip body system

Claims (5)

トーチ本体に中空状の取付ジグが設けられ、該取付ジグ内に消耗電極である溶接ワイヤを保持する長尺のチップボディが設けられている消耗電極式溶接トーチであって、
前記チップボディは、前記取付ジグの内部に弾性支持部材を介して支持され、該弾性支持部材は前記チップボディの自由状態における曲げ１次の振動モードの節部を支持しており、
前記チップボディには、当該チップボディを曲げ１次の振動モードで共振させる圧電素子が設けられていることを特徴とする消耗電極式溶接トーチ。 A consumable electrode type welding torch in which a hollow mounting jig is provided in the torch body, and a long tip body for holding a welding wire as a consumable electrode is provided in the mounting jig,
The tip body is supported inside the mounting jig via an elastic support member, and the elastic support member supports a node portion of a bending primary vibration mode in a free state of the tip body,
A consumable electrode type welding torch, wherein the chip body is provided with a piezoelectric element that resonates the chip body in a primary vibration mode. 前記チップボディは、中心部に溶接ワイヤが貫通し、先端部に前記溶接ワイヤを保持するチップを有し、中途部には当該チップボディの径方向に突出状の鍔部材がチップボディの軸心方向に沿って一対備えられていて、
前記圧電素子は、その伸縮方向が前記チップボディの軸心方向に沿うように前記一対の鍔部材の間に少なくとも１つ設けられていることを特徴とする請求項１に記載の消耗電極式溶接トーチ。 The tip body has a tip through which a welding wire penetrates at the center portion and holds the welding wire at a tip portion, and a flange member protruding in the radial direction of the tip body is provided at the middle portion of the tip body. A pair is provided along the direction,
2. The consumable electrode welding according to claim 1, wherein at least one of the piezoelectric elements is provided between the pair of flange members so that an expansion / contraction direction thereof is along an axial direction of the tip body. torch. 前記チップボディの曲げ１次モードの固有振動数の変化に前記圧電素子の伸縮の周波数を追従させるべく、圧電素子の駆動周波数を可変とする自動追尾手段を備えていることを特徴とする請求項１又は２に記載の消耗電極式溶接トーチ。   2. An automatic tracking means for making the drive frequency of the piezoelectric element variable so that the frequency of expansion and contraction of the piezoelectric element follows the change in the natural frequency of the bending primary mode of the chip body. The consumable electrode type welding torch according to 1 or 2. 前記鍔部材、圧電素子、チップボディの少なくともいずれか１つを冷却する冷却手段を有していることを特徴とする請求項１〜３のいずれかに記載の消耗電極式溶接トーチ。   The consumable electrode type welding torch according to any one of claims 1 to 3, further comprising a cooling means for cooling at least one of the flange member, the piezoelectric element, and the chip body. 前記冷却手段は、内部を冷却液が流通可能となっている管状部材と、冷却液が流通可能となっている中空部を備えた前記鍔部材とを有し、前記管状部材が鍔部材の中空部に連通していることを特徴とする請求項４に記載の消耗電極式溶接トーチ。   The cooling means includes a tubular member through which a coolant can flow and a flange member having a hollow portion through which the coolant can flow, and the tubular member is a hollow member of the flange member. The consumable electrode type welding torch according to claim 4, wherein the consumable electrode type welding torch is in communication with a portion.
JP2007328595A 2007-12-20 2007-12-20 Consumable electrode welding torch Expired - Fee Related JP4907511B2 (en)

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Publication number Priority date Publication date Assignee Title
KR101713110B1 (en) * 2016-04-20 2017-03-08 한국기계연구원 Apparatus for supplying wire using oscillator
CN107717190A (en) * 2017-10-11 2018-02-23 哈尔滨工业大学 Gas shielded arc welding droplet transfer control device and control method based on molten drop resonance principle
CN109807418A (en) * 2019-03-24 2019-05-28 北京工业大学 A kind of high-frequency vibration laser is from fuse welding method

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JPS62114772A (en) * 1985-11-12 1987-05-26 Mitsubishi Heavy Ind Ltd Mig welding method
JPH07131280A (en) * 1993-10-28 1995-05-19 Toyota Motor Corp Support structure for vibrator
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101713110B1 (en) * 2016-04-20 2017-03-08 한국기계연구원 Apparatus for supplying wire using oscillator
CN107717190A (en) * 2017-10-11 2018-02-23 哈尔滨工业大学 Gas shielded arc welding droplet transfer control device and control method based on molten drop resonance principle
CN107717190B (en) * 2017-10-11 2019-11-15 哈尔滨工业大学 Gas shielded arc welding droplet transfer control device and control method based on molten drop resonance principle
CN109807418A (en) * 2019-03-24 2019-05-28 北京工业大学 A kind of high-frequency vibration laser is from fuse welding method

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