JPS6143697B2 - - Google Patents
Info
- Publication number
- JPS6143697B2 JPS6143697B2 JP4574377A JP4574377A JPS6143697B2 JP S6143697 B2 JPS6143697 B2 JP S6143697B2 JP 4574377 A JP4574377 A JP 4574377A JP 4574377 A JP4574377 A JP 4574377A JP S6143697 B2 JPS6143697 B2 JP S6143697B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- welding
- arc
- welding arc
- electro
- 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.)
- Expired
Links
- 238000003466 welding Methods 0.000 claims description 39
- 239000000919 ceramic Substances 0.000 claims description 15
- 230000003287 optical effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Description
【発明の詳細な説明】
本発明は溶接アーク現象の撮影装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for photographing welding arc phenomena.
溶接アーク現象を撮影，記録し、現象を解析す
ることは溶接棒や溶接法の改良研究上極めて重要
なことである。しかし溶接アーク現象は不規則で
急激に変動しておりしかも強い光を発しているた
め肉眼観察ではよく判らず、一般的には高速度撮
影カメラで写して観察している。 Photographing, recording, and analyzing welding arc phenomena are extremely important for research on improving welding rods and welding methods. However, the welding arc phenomenon is irregular and fluctuates rapidly, and it emits strong light, so it is difficult to see with the naked eye, and it is generally observed by photographing it with a high-speed camera.
この高速度カメラを用いる方法によれば、急激
なアーク現象をとらえることができるが、溶接ア
ークから発生する光量も急激にかつ不規則に変動
するため常に最適な露出条件で撮影することは不
可能であり、このため激しいアーク光のみが白く
写つている個所や、露出不足のためにほとんど何
も写つていない個所などが多く見られ、現象を正
確に観察することが困難であつた。特に炭酸ガス
アーク溶接法における短絡移行現象のようにアー
クと短絡を繰り返す現象では、あたかも強烈なラ
イトの点澄−消滅の繰り返しと同様なので撮影が
困難である。 This method of using a high-speed camera makes it possible to capture sudden arc phenomena, but the amount of light generated from the welding arc also fluctuates rapidly and irregularly, making it impossible to always take pictures under optimal exposure conditions. As a result, there were many places where only the intense arc light appeared white, and places where almost nothing was visible due to underexposure, making it difficult to observe the phenomenon accurately. In particular, it is difficult to photograph a phenomenon in which short circuits and arcs occur repeatedly, such as the short circuit transfer phenomenon in carbon dioxide arc welding, as it is similar to the repeated flashing and extinguishing of intense light.
この発明は上記にかんがみ短絡移行現象のよう
に非常に撮影が困難なものでも十分明瞭に撮影す
ることができる溶接アーク現象撮影装置を提供す
ることを目的とするものである。 In view of the above, it is an object of the present invention to provide a welding arc phenomenon photographing device that can sufficiently clearly photograph even a phenomenon that is extremely difficult to photograph, such as a short-circuit transition phenomenon.
以下本発明の一実施例を第１図〜第５図によつ
て説明する。第１図において、１は直流電源で
（以下電源と称す）で、この電流１により直流電
圧が得られる。２は直流リアクトルで電源１とこ
の直流リアクトル２によつて構成される回路によ
つて溶接アーク３が得られる。この溶接アーク３
の電圧を、溶接アーク電圧検出ケーブル４，５に
よつて制御装置６へアーク電圧信号を送る。制御
装置６では検出ケーブル４，５によつて送られて
来たアーク電圧信号を、電気光学セラミツクス７
が動作可能なレベルに変換する。この電気光学セ
ラミツクス７は溶接アーク電圧の大きさによつて
任意に透過光量を制御できるもので、例えば
PbLaO3系固容体セラミツクスのようなものであ
る。 An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. In FIG. 1, 1 is a DC power supply (hereinafter referred to as a power supply), and this current 1 provides a DC voltage. 2 is a DC reactor, and a welding arc 3 is obtained by a circuit constituted by a power source 1 and this DC reactor 2. This welding arc 3
An arc voltage signal is sent to the control device 6 via the welding arc voltage detection cables 4 and 5. In the control device 6, the arc voltage signal sent by the detection cables 4 and 5 is sent to the electro-optic ceramics 7.
Convert it to an operable level. The electro-optic ceramics 7 can control the amount of transmitted light arbitrarily depending on the magnitude of the welding arc voltage, for example.
It is similar to PbLaO 3 -based solid ceramics.
上記のように構成した装置を使用して溶接アー
ク現象を撮影する場合、第２図のオシログラフに
示すように溶滴の短絡に伴つてアーク電圧が低下
すると、制御装置６はこの信号を受け、あらかじ
め設定した電流レベルVa以下にアーク電圧が下
がつた時、電気光学セラミツクス７に動作電圧Ｖ
ONが印加する。電気光学セラミツク７は動作電圧
ＶONが印加されるとその遮光比が変化し、印加前
の1/30以下になる。すなわち絞りを一杯に開いた
状態になる。溶滴が短絡している状態では溶接ア
ークは消滅しているので当然フイルム（受光面）
に入射する光量は、溶接アークが発生している時
の1/30以下である。 When photographing the welding arc phenomenon using the device configured as described above, when the arc voltage decreases due to droplet short-circuiting as shown in the oscillograph of Fig. 2, the control device 6 receives this signal. , when the arc voltage drops below the preset current level Va, the electro-optic ceramics 7
ON is applied. When the operating voltage V ON is applied to the electro-optic ceramic 7, its light-shielding ratio changes and becomes 1/30 or less of that before the application. In other words, the aperture is fully opened. When the droplets are short-circuited, the welding arc is extinguished, so naturally the film (light-receiving surface)
The amount of light incident on the welding arc is less than 1/30 of that when the welding arc is occurring.
したがつて第２図に示すように、溶接アークが
発生している時は電気光学セラミツクス７に印加
する電圧をゼロもしくはマイナス数十Ｖにし、溶
接アークが消滅した時には数百Ｖ印加すれば、フ
イルムに入射する光量はいつもほぼ一定に保つこ
とができる。 Therefore, as shown in FIG. 2, when the welding arc is occurring, the voltage applied to the electro-optic ceramics 7 is set to zero or minus several tens of volts, and when the welding arc is extinguished, several hundred volts is applied. The amount of light incident on the film can be kept almost constant at all times.
第３図は溶接アーク現象を本発明装置を高速度
カメラと一緒に用いて撮影する場合の概略図であ
る。すなわち直流溶接電源１からの供給流によつ
て溶接アーク３が発生し、溶接ワイヤ８が溶融し
母材９に移行する。この溶接ワイヤ８は溶接電源
１からの制御信号によつて駆動するモータ１０と
連結した送給ローラ１１によつて溶接アーク３へ
連続的に供給される。このアーク電圧を電圧検出
ケーブル４おび５によつて制御装置６に入力し、
さらにあらかじめ設定した電圧レベルと比較して
電気光学セラミツクス７の駆動電圧を入力信号に
応じて出力する。電気光学セラミツクス７はレン
ズ１２と高速度カメラ１３との間に挿入する。 FIG. 3 is a schematic diagram of a case where a welding arc phenomenon is photographed using the apparatus of the present invention together with a high-speed camera. That is, the welding arc 3 is generated by the flow supplied from the DC welding power source 1, and the welding wire 8 is melted and transferred to the base metal 9. This welding wire 8 is continuously supplied to the welding arc 3 by a feed roller 11 connected to a motor 10 driven by a control signal from the welding power source 1. This arc voltage is input to the control device 6 via voltage detection cables 4 and 5,
Furthermore, it compares it with a preset voltage level and outputs the driving voltage for the electro-optic ceramics 7 according to the input signal. Electro-optic ceramics 7 are inserted between lens 12 and high-speed camera 13.
短絡移行現象ではその短絡回数は最高120回／
秒程度でこの時の短絡時間は２〜3msである。し
たがつて電気光学セラミツクス７の応答速度はこ
れ以下でなければならないが、本装置に用いた電
気光学セラミツクス７はその応答速度が数μｓで
あるのでアーク電圧変動に対して十分追従するこ
とができる。 In the short circuit transition phenomenon, the number of short circuits is up to 120 times/
The short circuit time at this time is about 2 to 3 ms. Therefore, the response speed of the electro-optic ceramic 7 must be less than this, but the electro-optic ceramic 7 used in this device has a response speed of several μs, so it can sufficiently follow arc voltage fluctuations. .
第４図はビデオ装置と組合せて観察する場合の
概略図である。すなわち図において、１４はビデ
オカメラで、ビデオカメラ１４からの信号はビデ
オコーダ１５で記録される。あるいはビデオモニ
タ１６を接続し、肉眼で観察するものである。 FIG. 4 is a schematic diagram when observing in combination with a video device. That is, in the figure, 14 is a video camera, and a signal from the video camera 14 is recorded by a video coder 15. Alternatively, a video monitor 16 may be connected to observe the image with the naked eye.
第５図は制御装置６の詳細図で、図において、
１７はアーク電圧分圧用抵抗、１８は絶縁アン
プ、１９は基準電圧設定用抵抗、２０は比較器、
２１はトランジスタであり、他は第１図と同様で
ある。次に上記実施例の動作について説明する
と、まず直流溶接電源１からの供給電流によつて
溶接アーク３が発生すると溶接ワイヤと母材８と
の間にはアーク電圧が生じる。このアーク電圧を
アーク電圧分圧用抵抗１７で分圧してこの信号を
絶縁アンプ１８に入力する。この絶縁アンプ１８
は溶接メイン回路と制御回路とを絶縁すると共
に、不必要な高い周波数成分をカツトするフイル
タの役目を果たす。次に絶縁アンプ１８で整形さ
れた信号と基準電圧設定用抵抗１９で設定した電
圧信号とを比較器２０で比較し、もし絶縁アンプ
１８の出力信号が基準電圧よりも低い場合には比
較器２０の出力にプラスの電圧が生じ、その結果
トランジスタ２１がONになり、電気シヤツタ７
に高電圧（200V）が印加されて遮光比は印加前
の約1/30以下になるものである。 FIG. 5 is a detailed diagram of the control device 6, and in the figure,
17 is a resistor for arc voltage division, 18 is an insulation amplifier, 19 is a reference voltage setting resistor, 20 is a comparator,
21 is a transistor, and the other parts are the same as in FIG. Next, the operation of the above embodiment will be described. First, when a welding arc 3 is generated by the current supplied from the DC welding power source 1, an arc voltage is generated between the welding wire and the base metal 8. This arc voltage is divided by an arc voltage dividing resistor 17 and this signal is input to an insulation amplifier 18. This isolation amplifier 18
acts as a filter to insulate the welding main circuit and the control circuit and to cut out unnecessary high frequency components. Next, a comparator 20 compares the signal shaped by the isolation amplifier 18 and the voltage signal set by the reference voltage setting resistor 19, and if the output signal of the isolation amplifier 18 is lower than the reference voltage, the comparator 20 A positive voltage is generated at the output of
When a high voltage (200V) is applied to the shading ratio, the shading ratio becomes approximately 1/30 or less of that before the application.
以上説明したように本発明によれば、受光面と
光学レンズ系との間に電気光学セラミツクスを設
けたことにより、溶接アークの強烈な光が点澄−
消滅をくり返すアーク溶接法の短絡移行現象でも
カメラあるいは受光面に入射する光量をほぼ一定
に保つことができ、このため常に最適な露出条件
で溶接アーク現象を撮影することができる。 As explained above, according to the present invention, by providing electro-optic ceramics between the light-receiving surface and the optical lens system, the intense light of the welding arc can be used as a spot point.
Even in the short-circuit transition phenomenon of arc welding, which repeatedly disappears, the amount of light incident on the camera or light-receiving surface can be kept almost constant, making it possible to always photograph the welding arc phenomenon under optimal exposure conditions.
第１図は本発明の自動絞り装置のブロツク図、
第２図は溶接電流，アーク電圧，電気光学セラミ
ツクス入力電圧の関係を示す説明用線図、第３図
は本発明の溶接アーク現象撮影装置の実施例の説
明図、第４図は溶接アーク現象撮影装置の他の実
施例の説明図、第５図は制御装置の詳細説明図で
ある。
１……直流電源、３……溶接アーク、６……制
御装置、７……電気光学セラミツクス、１３……
高速度カメラ、１４……ビデオカメラ、１８……
絶縁アンプ、２０……比較器、２１……トランジ
スタ。
FIG. 1 is a block diagram of the automatic diaphragm device of the present invention.
Fig. 2 is an explanatory diagram showing the relationship between welding current, arc voltage, and electro-optic ceramic input voltage, Fig. 3 is an explanatory diagram of an embodiment of the welding arc phenomenon photographing device of the present invention, and Fig. 4 is an explanatory diagram of the welding arc phenomenon. An explanatory diagram of another embodiment of the photographing device, and FIG. 5 is a detailed explanatory diagram of the control device. 1... DC power supply, 3... Welding arc, 6... Control device, 7... Electro-optic ceramics, 13...
High-speed camera, 14... Video camera, 18...
Isolated amplifier, 20... comparator, 21... transistor.
Claims (1)
けられて印加電圧の大きさによつて任意に透過光
量を制御できる電気光学セラミツクスと、溶接ア
ーク電圧と基準電圧とを比較し、溶接アーク電圧
と基準電圧との差に応じて前記電気光学セラミツ
クスへの印加電圧を変更する制御装置とからな
り、常に受光面に入射する光量を一定に保つよう
にしたことを特徴とする溶接アーク現象撮影装
置。1 Comparing the welding arc voltage and reference voltage with electro-optic ceramics, which is installed between the light-receiving surface of the photographing device and the optical lens system and can arbitrarily control the amount of transmitted light depending on the magnitude of the applied voltage, the welding arc Photographing a welding arc phenomenon, characterized by comprising a control device that changes the voltage applied to the electro-optic ceramic according to the difference between the voltage and a reference voltage, so that the amount of light incident on the light-receiving surface is always kept constant. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4574377A JPS53131830A (en) | 1977-04-22 | 1977-04-22 | Camera for photographing welding arc phenomenon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4574377A JPS53131830A (en) | 1977-04-22 | 1977-04-22 | Camera for photographing welding arc phenomenon |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS53131830A JPS53131830A (en) | 1978-11-17 |
| JPS6143697B2 true JPS6143697B2 (en) | 1986-09-29 |
Family
ID=12727790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4574377A Granted JPS53131830A (en) | 1977-04-22 | 1977-04-22 | Camera for photographing welding arc phenomenon |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS53131830A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6367337A (en) * | 1986-07-07 | 1988-03-26 | ト−マス クルト フレニンゲ | Method and apparatus for washing piping system for operating bath |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003220597A1 (en) * | 2002-03-27 | 2003-10-13 | Praxair Technology, Inc. | Luminescence sensing system for welding |
-
1977
- 1977-04-22 JP JP4574377A patent/JPS53131830A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6367337A (en) * | 1986-07-07 | 1988-03-26 | ト−マス クルト フレニンゲ | Method and apparatus for washing piping system for operating bath |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53131830A (en) | 1978-11-17 |
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