JPH0584575A - Arc generator - Google Patents
Arc generatorInfo
- Publication number
- JPH0584575A JPH0584575A JP27722591A JP27722591A JPH0584575A JP H0584575 A JPH0584575 A JP H0584575A JP 27722591 A JP27722591 A JP 27722591A JP 27722591 A JP27722591 A JP 27722591A JP H0584575 A JPH0584575 A JP H0584575A
- Authority
- JP
- Japan
- Prior art keywords
- arc
- cathode
- width
- welding
- modulated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- Arc Welding Control (AREA)
- Arc Welding In General (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、音声信号，パルス信号
によって変調した電流をアーク電極に供給するアーク発
生装置に関し、さらに詳述すればアークを振動体として
音を発生する装置又はパルス信号を印加して溶融池の溶
込み深さを制御するパルスアーク溶接装置に用いられる
アーク発生装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arc generator for supplying a current modulated by a voice signal and a pulse signal to an arc electrode, and more specifically, a device for generating a sound using an arc as a vibrating body or a pulse signal. The present invention relates to an arc generator used in a pulse arc welding device for controlling a penetration depth of a molten pool by applying a voltage.
【０００２】[0002]
【従来の技術】非消耗式電極を用いた直流 TIG溶接装
置, 直流プラズマアーク装置等の直流アーク機器におい
て、アーク電流をラジオ放送, コンパクトディスク等の
音声信号によって変調し、アークの広がり幅を音声信号
に応じて伸縮させて音を発するアーク発生装置が開示さ
れている（特開平２−11271 号）。2. Description of the Related Art In DC arc equipment such as DC TIG welding equipment and DC plasma arc equipment using non-consumable electrodes, arc current is modulated by audio signals from radio broadcasting, compact discs, etc. An arc generator that expands and contracts according to a signal to emit a sound is disclosed (JP-A-2-11271).
【０００３】アーク柱は、従来から用いられているスピ
ーカの振動体と比べて慣性が小さいため、入力信号の急
激な変化に対しても高い忠実度でアークの広がり幅が伸
縮する。従来のアーク発生装置では音声周波数の中でも
特に中高音域（300Hz以上）の周波数特性が良好であ
る。Since the arc column has a smaller inertia than the vibrating body of the speaker that has been used conventionally, the spread width of the arc expands and contracts with high fidelity even with a sudden change in the input signal. In the conventional arc generator, the frequency characteristics in the mid-high range (300 Hz or higher) are particularly good among the voice frequencies.
【０００４】また、裏波溶接では、数10Hz以下のパルス
信号によってアーク電流値を周期的に変化させ、パルス
の大電流により溶融池を対流させて溶接材のギャップに
おける溶込み深さを制御して裏波ビードを安定化させて
いる。Further, in Uranami welding, the arc current value is periodically changed by a pulse signal of several tens of Hz or less, and a large pulse current causes convection in the molten pool to control the penetration depth in the gap of the welding material. Stabilizes the Urabami bead.
【０００５】図１は従来のアーク発生装置のアーク電極
部分の模式図である。図中１は棒状のタングステンの先
端を尖らせた陰極、２は水冷銅板等を用いた陽極であっ
て、陰極１の先端を放電端として陽極２との間にアーク
柱３を発生させる。アーク柱３は陽極２側で幅ｗに広が
る。FIG. 1 is a schematic view of an arc electrode portion of a conventional arc generator. In the figure, 1 is a cathode having a rod-shaped tungsten tip, and 2 is an anode using a water-cooled copper plate or the like, and an arc column 3 is generated between the cathode 1 and the anode 2 with the tip as a discharge end. The arc column 3 spreads across the width w on the anode 2 side.
【０００６】アーク電流を音声信号によって変調すると
アーク柱３は音声信号の振幅に応じて、図１に実線及び
点線で示すように伸縮して周囲の空気を振動させて音を
発する。When the arc current is modulated by the voice signal, the arc column 3 expands and contracts as shown by the solid line and the dotted line in FIG. 1 according to the amplitude of the voice signal to vibrate the surrounding air to emit a sound.
【０００７】また、アーク電流をパルス信号によって変
調するとアーク柱３は点線で示す幅から実線で示す幅に
膨張する。When the arc current is modulated by the pulse signal, the arc column 3 expands from the width shown by the dotted line to the width shown by the solid line.
【０００８】[0008]
【発明が解決しようとする課題】しかし、入力信号の周
波数が 300Hzより低い領域ではアーク柱は伸縮するが、
低音は比較的音圧が高くないと人の耳には聴こえないの
で、アーク柱の伸縮幅が小さくてまわりの空気があまり
振動しない場合、アークによって発せられる音声は低音
域が抜けて高音域のみ強調された聴きづらい音声とな
る。However, the arc column expands and contracts in the region where the frequency of the input signal is lower than 300 Hz,
Bass sounds are not audible to the human ear unless the sound pressure is relatively high, so if the expansion and contraction width of the arc column is small and the surrounding air does not vibrate too much, the sound emitted by the arc will be out of the low range and only in the high range. The sound is emphasized and hard to hear.
【０００９】また、数10Hz以下のパルス信号を入力して
溶融池を制御する場合にアーク柱の広がり幅が狭い範囲
に制限されていると、パルスアーク溶接のような高アー
ク電流の溶接条件下では、狭い範囲に過剰に集中したア
ークの衝撃力によって溶落ちが発生するので溶接能率が
低い。Further, when controlling the molten pool by inputting a pulse signal of several tens of Hz or less, if the width of the arc column is limited to a narrow range, welding conditions of high arc current such as pulse arc welding will occur. Then, since the burn through occurs due to the impact force of the arc excessively concentrated in a narrow range, the welding efficiency is low.
【００１０】本発明はこのような問題点を解決するため
になされたものであって、陽極側でのアークの広がり幅
を大きくすることにより、アークを振動体として音声を
発するアーク発生装置の低音域での周波数特性を改善
し、一方、パルスアーク溶接における溶接能率を高める
アーク発生装置の提供を目的とする。The present invention has been made in order to solve such a problem, and by increasing the spread width of the arc on the anode side, the arc generator for generating a sound by using the arc as a vibrating body has a low level. An object of the present invention is to provide an arc generator that improves frequency characteristics in the sound range and enhances welding efficiency in pulse arc welding.
【００１１】[0011]
【課題を解決するための手段】本発明のアーク発生装置
は、変調した電流を非消耗式のアーク電極に供給するア
ーク発生装置において、アーク電極の陰極の放電端に深
さ１ｍｍ以上，アーク放電端の幅が３ｍｍ以下の孔を放
電方向に穿設してなることを特徴とする。The arc generator of the present invention is an arc generator for supplying a modulated current to a non-consumable arc electrode, wherein the discharge end of the cathode of the arc electrode has a depth of 1 mm or more and arc discharge. It is characterized in that a hole having an end width of 3 mm or less is formed in the discharge direction.
【００１２】[0012]
【作用】本発明のアーク発生装置は、陰極のリング状の
放電端から発生するアークは、陰極先端が尖っている場
合よりも陽極側での広がり幅が大きくなる。従って、よ
り広い領域の空気を振動させるので 300Hz以下の低音域
の周波数特性が良好であり、また、高アーク電流の溶接
条件下でもパルス印加時に狭い範囲へのアークの集中が
避けられるので溶落ち等が発生しない。In the arc generator of the present invention, the arc generated from the ring-shaped discharge end of the cathode has a wider spread on the anode side than when the tip of the cathode is sharp. Therefore, since the air in a wider area is vibrated, the frequency characteristics in the low-pitched sound area of 300 Hz or less are good, and even under the welding conditions of high arc current, the concentration of the arc in a narrow area can be avoided when a pulse is applied, so the burn-through is prevented. Etc. does not occur.
【００１３】孔の深さは孔の内部からアークが発生しな
い深さとして１mm以上が望ましく、またアーク放電端の
幅ｔはゼロ又はアークが不安定にならない幅があっても
よいが、３mmよりも大きくなると、アーク放電端に陰極
点が形成され、アークが集中して、アークの広がり幅ｗ
が従来法に比べて広くならないため、ｔは３mm以下にす
る必要がある。The depth of the hole is preferably 1 mm or more as a depth at which an arc is not generated from the inside of the hole, and the width t of the arc discharge end may be zero or may have a width which does not make the arc unstable, but it is more than 3 mm. Becomes larger, a cathode spot is formed at the arc discharge end, the arc is concentrated, and the arc spread width w
Does not become wider than the conventional method, so t must be 3 mm or less.
【００１４】[0014]
【実施例】以下、本発明をその実施例を示す図に基づい
て説明する。図２は本発明のアーク発生装置（以下、本
発明装置という）に用いられる陰極の先端部形状を示す
図であって、(a) は縦断面図、(b) は先端側から見た正
面図である。図中１は直径ｄ1 の棒状タングステンの陰
極であって、その先端部は頂角θの円錐台状をなし、そ
の先端面からは孔径ｄ2 、深さａの孔11が陰極１の軸方
向に穿設されており、陰極１の先端面には、幅ｔのリン
グ状のアーク放電端12が形成されている。陰極１の放電
端12と陽極との間にアーク柱を発生させる。The present invention will be described below with reference to the drawings showing the embodiments thereof. 2A and 2B are views showing the shape of the tip of a cathode used in the arc generator of the present invention (hereinafter referred to as the apparatus of the present invention). (A) is a longitudinal sectional view, (b) is a front view from the tip side. It is a figure. In the figure, reference numeral 1 denotes a rod-shaped tungsten cathode having a diameter d 1 , the tip of which is frustoconical with an apex angle θ, and a hole 11 having a hole diameter d 2 and a depth a from the tip surface is the axis of the cathode 1. The arc-shaped arc discharge end 12 having a width t is formed on the tip surface of the cathode 1. An arc column is generated between the discharge end 12 of the cathode 1 and the anode.
【００１５】以上のようなリング状のアーク放電端12を
有する陰極１を用いると、アークが孔11のまわりにリン
グ状に均一に分散して得られるため、陰極１の先端が尖
っている従来例に比してアークの広がり幅ｗが広くな
る。その結果、アークの振動幅が相対的に広くなるので
アークによってより広い領域の空気を振動させることが
できるため、 300Hz以下の低音域の周波数特性が良好と
なる。When the cathode 1 having the ring-shaped arc discharge end 12 as described above is used, the arc is uniformly dispersed in the ring shape around the hole 11, so that the tip of the cathode 1 is sharp. The spread width w of the arc is wider than in the example. As a result, the width of the vibration of the arc becomes relatively wide, and air in a wider area can be vibrated by the arc, so that the frequency characteristics in the low frequency range of 300 Hz or lower become good.
【００１６】また、パルスアーク溶接においても、アー
クの広がり幅ｗがより広くなるため、溶接電流が高くな
ってもアークが比較的広い範囲に広がるので溶落ちが生
じず溶接能率が高い。Also in the pulse arc welding, since the spread width w of the arc becomes wider, the arc spreads in a relatively wide range even when the welding current becomes high, so that burn-through does not occur and the welding efficiency is high.
【００１7 】[0000]
【表１】 [Table 1]
【００１８】表１は本発明装置による実施例と従来例と
を比較したものである。なお、陰極には８mmφのタング
ステン電極、陽極には水冷鋼板を用い、陰極を陽極に10
mmの距離で対向させ、また音声入力は 100Hzの正弦波を
用いてアーク電流の振幅が 100ＡP-P となるように調整
し、さらに、アルゴンガス雰囲気にて、アークから50cm
離れた位置での音の強さで低音域の周波数特性を評価し
た。Table 1 compares the embodiment of the device of the present invention with the conventional example. In addition, a tungsten electrode of 8 mmφ is used for the cathode, a water-cooled steel plate is used for the anode, and the cathode is used as the anode.
is opposed in mm distance, also the voice input is adjusted so that the amplitude of the arc current is 100A PP with 100Hz sine wave, further, in an argon gas atmosphere, 50 cm from the arc
The frequency characteristics in the bass range were evaluated by the sound intensity at the distant position.
【００１９】本発明による実施例 No.１, No.２, No.
３では、 100Hzの音の強さが90ないし 100dBと、従来例
No.４， No.５の60dBと比較して大幅に大きくなり、低
音域での周波数特性が改善される。Embodiments according to the present invention No. 1, No. 2, No.
In 3, the sound intensity of 100 Hz is 90 to 100 dB, which is a conventional example.
Compared with 60dB of No.4 and No.5, it is much larger, and the frequency characteristic in the low frequency range is improved.
【００２０】比較例 No.６では孔の底部にアークが集中
し、比較例 No.７では電極端部の平坦部（陰極点）にア
ークが集中するため、アークの幅ｗが従来法よりも広が
らず、周波数特性が改善されなかった。In Comparative Example No. 6, the arc is concentrated on the bottom of the hole, and in Comparative Example No. 7, the arc is concentrated on the flat part (cathode point) of the electrode end, so that the arc width w is smaller than that of the conventional method. It did not spread and the frequency characteristics were not improved.
【００２１】表２に本発明によるパルスアーク溶接の実
施例を従来例と比較して示す。陰極には８mmφのタング
ステン電極を用い、板厚 1.4mmのステンレス鋼板（SUS3
04）をＩ開先、ギャップ１mmで２Hzのパルスを入力して
突き合わせ溶接を実施した。Table 2 shows examples of pulse arc welding according to the present invention in comparison with conventional examples. An 8 mmφ tungsten electrode is used for the cathode, and a 1.4 mm thick stainless steel plate (SUS3
Butt welding was carried out by inputting a 2 Hz pulse with an I groove and a gap of 1 mm.
【００２２】[0022]
【表２】 [Table 2]
【００２３】本発明による実施例 No.１， No.２では溶
落ちを生じることなく良好な溶接ビードが得られたが、
従来例では、溶接電流を高めて高速溶接条件とした No.
４で溶落ちを生じた。In Examples No. 1 and No. 2 according to the present invention, good weld beads were obtained without causing burn-through.
In the conventional example, no.
Burnout occurred at 4.
【００２４】[0024]
【発明の効果】以上のように、本発明装置は、陽極側で
のアークの広がり幅が大きくなるので、拡声装置として
用いた場合、低音域も良好に再生して周波数特性が改善
され、またパルスアーク溶接装置に用いた場合、パルス
アーク溶接の能率が高いという優れた効果を奏する。As described above, since the apparatus of the present invention has a large arc spread width on the anode side, when used as a loudspeaker, the bass range is also reproduced well and the frequency characteristic is improved. When used in a pulse arc welding device, it has an excellent effect of high efficiency of pulse arc welding.
【図１】従来のアーク発生装置の要部構成を示す模式図
である。FIG. 1 is a schematic diagram showing a main part configuration of a conventional arc generator.
【図２】本発明装置の要部構成を示す模式図である。FIG. 2 is a schematic view showing a main configuration of the device of the present invention.
１ 陰極 １１ 孔 １２ アーク放電端 1 cathode 11 hole 12 arc discharge end
Claims (1)
供給するアーク発生装置において、アーク電極の陰極の
放電端に深さ１ｍｍ以上，アーク放電端の幅が３ｍｍ以
下の孔を放電方向に穿設してなることを特徴とするアー
ク発生装置。1. An arc generator for supplying a modulated current to a non-consumable arc electrode, wherein a hole having a depth of 1 mm or more and a width of 3 mm or less at the arc discharge end is formed in a discharge direction of a cathode of the arc electrode in a discharge direction. An arc generator characterized by being formed by drilling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27722591A JPH0584575A (en) | 1991-09-26 | 1991-09-26 | Arc generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27722591A JPH0584575A (en) | 1991-09-26 | 1991-09-26 | Arc generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0584575A true JPH0584575A (en) | 1993-04-06 |
Family
ID=17580565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27722591A Pending JPH0584575A (en) | 1991-09-26 | 1991-09-26 | Arc generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0584575A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0647576A (en) * | 1992-07-30 | 1994-02-22 | Showa Alum Corp | Electrode for tig welding |
-
1991
- 1991-09-26 JP JP27722591A patent/JPH0584575A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0647576A (en) * | 1992-07-30 | 1994-02-22 | Showa Alum Corp | Electrode for tig welding |
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