JPS60187471A - Welding device - Google Patents
Welding deviceInfo
- Publication number
- JPS60187471A JPS60187471A JP4503284A JP4503284A JPS60187471A JP S60187471 A JPS60187471 A JP S60187471A JP 4503284 A JP4503284 A JP 4503284A JP 4503284 A JP4503284 A JP 4503284A JP S60187471 A JPS60187471 A JP S60187471A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- power source
- circuit
- current
- voltage
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、溶接母材の表面に酸化被膜が形成されたも
のでも溶接可能な溶接装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a welding device capable of welding even a weld base material with an oxide film formed on its surface.
従来の点溶接装置においては、溶接母材の表面が酸化し
ていると、その酸化被膜の抵抗により溶接困難な場合が
多かった。そのため、例えばアルミ溶接において、表面
にアルマイト処理されたも（１）
のは通常絶縁性が高いので、溶接部に溶接部分の酸化被
膜を取り除く作業が必要であり、非常に面倒であった。In conventional spot welding equipment, if the surface of the base material to be welded is oxidized, welding is often difficult due to the resistance of the oxide film. Therefore, for example, in aluminum welding, since the surface of aluminum (1) treated with alumite usually has high insulation properties, it is necessary to remove the oxide film from the welded part, which is very troublesome.
この発明の目的は、上記従来の溶接装置の欠点を解消し
、表面に酸化被膜が形成された溶接母材であっても、溶
接を容易になし得る溶接装置を提供することである。SUMMARY OF THE INVENTION An object of the present invention is to provide a welding apparatus that overcomes the drawbacks of the conventional welding apparatus described above and can easily weld even a welding base material having an oxide film formed on its surface.
上記目的を達成するために、この発明の溶接装置は、動
作当初に溶接母材に高電圧を印加して酸化被膜の絶縁を
破り、その後従来の溶接装置程度の電圧を印加して通常
の溶接動作をなすという２段階の電圧印加を行うように
している。すなわちこの発明の溶接装置は、比較的高い
電圧を出力する第１の電源と、この第１の電源よりも低
い電圧を出力する第２の電源と、当初は前記第１の電源
よりの高電圧を溶接母材に印加させ、切替により前記第
２の電源よりの電圧を溶接母材に印加させる切替回路と
、前記第１の電源による溶接母材への高電圧印加で前記
溶接母材に電流が流れると、この電流を検出し、前記切
替回路に切替信号を入（２）
力する電流検出回路とから構成されている。In order to achieve the above object, the welding device of the present invention applies a high voltage to the welding base material at the beginning of operation to break the insulation of the oxide film, and then applies a voltage similar to that of conventional welding devices to perform normal welding. Two steps of voltage application are performed to perform the operation. In other words, the welding device of the present invention includes a first power source that outputs a relatively high voltage, a second power source that outputs a lower voltage than the first power source, and initially a higher voltage than the first power source. a switching circuit that applies a voltage from the second power source to the welding base material by switching, and applying a high voltage to the welding base material by the first power source to apply current to the welding base material. When current flows, the current detecting circuit detects this current and inputs a switching signal to the switching circuit (2).
以下、実施例により、この発明をさらに詳細に説明する
。Hereinafter, the present invention will be explained in more detail with reference to Examples.
第１図は、この発明の１実施例を示す溶接装置の回路図
である。同図において、１は比較的高い直流電圧Ｅ１を
出力する電源回路、２は直流電圧Ｅ１よりも低い直流電
圧Ｅ２を出力する電源回路である。この電源回路２は、
従来の溶接装置にも備えられていたものである。３ば切
替制御回路であって、この回路の制御作用により、電源
回路１のＷ漆電圧Ｅ１と電源回路２の直流電圧Ｅ２が切
替出力されるようになっている。FIG. 1 is a circuit diagram of a welding device showing one embodiment of the present invention. In the figure, 1 is a power supply circuit that outputs a relatively high DC voltage E1, and 2 is a power supply circuit that outputs a DC voltage E2 that is lower than the DC voltage E1. This power supply circuit 2 is
This was also included in conventional welding equipment. 3 is a switching control circuit, and by the control action of this circuit, the W lacquer voltage E1 of the power supply circuit 1 and the DC voltage E2 of the power supply circuit 2 are switched and output.
４ａ、４ｂは溶接母材であり、これら溶接母材４ａ、４
．ｂ間には、直流電圧Ｅ１あるいは直流電圧Ｅ２が印加
されるようになっている。５は溶接母材４ａ、４ｂに流
れる電流を検出するための電流検出回路である。4a and 4b are welding base materials, and these welding base materials 4a, 4
．． A DC voltage E1 or a DC voltage E2 is applied between the terminals b. 5 is a current detection circuit for detecting the current flowing through the welding base materials 4a and 4b.
電源回路１ば、交流電源ＡＳ １、負荷制御用のサイリ
スクＴｈｌ・Ｔｈ２、トランスＴ１及び整流用ダイオー
ドＤ１・Ｄ２から構成されており、（３）
同様に電源回路２は交流電源ＡＳ２、負荷制御用のサイ
リスクＴ１１３・Ｔｈ４、トランスＴ２及び整流用ダイ
オードＤ３・Ｄ４から構成されている。しかし、これら
電源回路１．２の内部構成はよく知られたものである。The power supply circuit 1 is composed of an AC power supply AS 1, a thyristor Thl/Th2 for load control, a transformer T1, and rectifying diodes D1/D2.(3) Similarly, the power supply circuit 2 is composed of an AC power supply AS2, for load control. It is composed of a cyrisk T113 and Th4, a transformer T2, and rectifying diodes D3 and D4. However, the internal configuration of these power supply circuits 1.2 is well known.
もっとも、Ｅｌ＞Ｅ２となるように、トランスＴ１の１
次側、２次側の巻数をＮｌ、Ｎ２とし、トランスＴ２の
１次側、２次側の巻数をＮ３、Ｎ４とすると、両トラン
スＴＩ、Ｔ２ばＮ２／Ｎｌ＞ ＞Ｎ ４ ／Ｎ ３とな
るように設定されている。However, so that El>E2, 1 of transformer T1
If the number of turns on the next and secondary sides is Nl and N2, and the number of turns on the primary and secondary sides of transformer T2 is N3 and N4, then both transformers TI and T2 have N2/Nl>>N 4 /N 3. It is set to be.
次に、以上のように構成される実施例装置の動作を説明
する。Next, the operation of the embodiment apparatus configured as described above will be explained.
動作開始で、切替制御回路３はまず信号ａを電源回路１
に送り、サイリスクＴｈｌ・Ｔｈ２を動作させる。これ
により、電源回路１から直流電圧Ｅ１が出力され、この
直流電圧Ｅ１が溶接母材４ａ・４ｂ間に印加される。こ
の直流電圧Ｅ１の波形は、第２図のｔ−Ｅ（時間−電圧
）特性に示す通りである。溶接母材４ａ・４ｂの表面に
酸化被膜が形成されていると電流が流れにくいが、直流
（４）
電圧Ｅ１は高電位なので、印加の継続で酸化被膜の絶縁
が破れ、通電電流１１が流れる。第２図では、直流電圧
Ｅ１の３個目の半サイクルで通電電流１１が流れたこと
を示している。At the start of operation, the switching control circuit 3 first sends the signal a to the power supply circuit 1.
and activate Cyrisk Thl and Th2. As a result, a DC voltage E1 is output from the power supply circuit 1, and this DC voltage E1 is applied between the welding base materials 4a and 4b. The waveform of this DC voltage E1 is as shown in the tE (time-voltage) characteristic in FIG. If an oxide film is formed on the surface of the welding base materials 4a and 4b, it is difficult for current to flow, but since the DC (4) voltage E1 is at a high potential, the insulation of the oxide film is broken with continued application, and the current 11 flows. . FIG. 2 shows that the energizing current 11 flows during the third half cycle of the DC voltage E1.
電流１１が流れると、電流検出回路５はこの電流１１を
検出し、切替制御回路３に切替信号Ｃを送る。これに応
答して、切替制御回路３ば信号ａに代えて信号すを出力
し、この信号すを電源回路２に加えサイリスクＴｈ３・
Ｔｈ４を動作させる。When current 11 flows, current detection circuit 5 detects this current 11 and sends switching signal C to switching control circuit 3. In response to this, the switching control circuit 3 outputs a signal S instead of the signal a, and adds this signal S to the power supply circuit 2.
Operate Th4.
これにより電源回路２から直流電圧Ｅ２が出力され、こ
の直流電圧Ｅ２が溶接母材４ａ・４ｂ間に印加され、通
電電流■２が流れ（第２図参照）、酸化被膜がない状態
で、従来の溶接装置で溶接をなすのと同様の溶接が行わ
れる。As a result, a DC voltage E2 is output from the power supply circuit 2, and this DC voltage E2 is applied between the welding base materials 4a and 4b, and a current 2 flows (see Fig. 2). Welding is performed in the same manner as with the welding equipment of
なお、上記実施例において、サイリスクＴｈｌ、Ｔｈ２
・・・Ｔｈ４は通常のサイリスクを使用しているが、サ
イリスクＴｈｌ、Ｔｈ２は通常のものに代えて、ゲート
ターンオフサイリスクを用いてもよい。このようにする
ことにより、第３図に示す波形の斜線部のみのｉｌｌ！
電が可能となり、電源（５）
回路１による通電時のエネルギーが制御でき、この電源
回路による通電が絶縁破壊にのみ使用されることになる
ので、その後の通常の溶接に影響を及ぼさない通電をな
すことができる。In addition, in the above example, Cyrisk Thl, Th2
...For Th4, a normal thyrisk is used, but for the thyrisks Thl and Th2, gate turn-off thyrisks may be used instead of the normal ones. By doing this, ill! of only the shaded part of the waveform shown in FIG.
This makes it possible to control the energy when energizing by power supply (5) circuit 1, and the energizing by this power circuit is used only for dielectric breakdown, making it possible to energize without affecting subsequent normal welding. It can be done.
この発明の溶接装置によれば、溶接母材に最初高電位を
印加し、絶縁破壊による電流検出で通常の溶接電圧を印
加し溶接を行うものであるから、溶接母材の表面にたと
え酸化被膜等が形成されていても、これを苦にすること
なく溶接をなすことができる。また、溶接母材が表面に
アルマイト処理されたアルミ等であっても、溶接前に溶
接部分のアルマイト処理膜を取り除く作業を全く要する
ことなく溶接を行うことができる。According to the welding device of the present invention, welding is performed by first applying a high potential to the welding base material and then applying a normal welding voltage by detecting current caused by dielectric breakdown. Even if there are any formations, welding can be carried out without any problems. Furthermore, even if the welding base material is aluminum or the like whose surface has been alumite-treated, welding can be performed without any work required to remove the alumite-treated film from the welding portion before welding.
第１図は、この発明の１実施例を示す溶接装置の回路図
、第２図は同溶接装置の動作を説明するための溶接母材
への印加電圧及び通電電流の波形図、第３図は同溶接装
置の高電圧発生用の電源回路にゲートターンオフサイリ
スタを使用した場合の印加電圧波形を示す図である。
（６）
１：高電圧用電源回路、２：低電圧用電源回路、３：切
替制御回路、４ａ・４ｂ：溶接母材、５：電流検出回路
。
特許出願人 八洲電機株式会社
代理人 弁理士 中 村 茂 信
（７）Fig. 1 is a circuit diagram of a welding device showing one embodiment of the present invention, Fig. 2 is a waveform diagram of voltage applied to the welding base material and current applied to the welding base material to explain the operation of the welding device, Fig. 3 FIG. 2 is a diagram showing an applied voltage waveform when a gate turn-off thyristor is used in the power supply circuit for high voltage generation of the welding apparatus. (6) 1: High voltage power supply circuit, 2: Low voltage power supply circuit, 3: Switching control circuit, 4a and 4b: Welding base material, 5: Current detection circuit. Patent applicant Yasu Electric Co., Ltd. Agent Patent attorney Shigeru Nakamura (7)
Claims (1)
１の電源よりも低い電圧を出力する第２の電源と、当初
は前記第１の電源よりの高電圧を溶接母材に印加させ、
切替により前記第２の電源よりの電圧を溶接母材に印加
させる切替回路と、前記第１の電源による溶接母材への
高電圧印加で前記溶接母材に電流が流れると、この電流
を検出し、前記切替回路に切替信号を入力する電流検出
回路を備えてなることを特徴とする溶接装置。(1) A first power source that outputs a relatively high voltage, a second power source that outputs a lower voltage than the first power source, and initially a higher voltage than the first power source that is applied to the welding base material. apply it,
A switching circuit that applies voltage from the second power source to the welding base material by switching, and detecting when current flows through the welding base material due to high voltage application to the welding base material by the first power source. A welding device comprising: a current detection circuit that inputs a switching signal to the switching circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4503284A JPS60187471A (en) | 1984-03-08 | 1984-03-08 | Welding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4503284A JPS60187471A (en) | 1984-03-08 | 1984-03-08 | Welding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60187471A true JPS60187471A (en) | 1985-09-24 |
| JPH0436789B2 JPH0436789B2 (en) | 1992-06-17 |
Family
ID=12707996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4503284A Granted JPS60187471A (en) | 1984-03-08 | 1984-03-08 | Welding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60187471A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007061903A (en) * | 2005-08-01 | 2007-03-15 | Honda Motor Co Ltd | Method and apparatus for manufacturing joined body |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847581A (en) * | 1981-09-17 | 1983-03-19 | Dengensha Mfg Co Ltd | Spot welding method and controller for steel plates having insulating film |
-
1984
- 1984-03-08 JP JP4503284A patent/JPS60187471A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847581A (en) * | 1981-09-17 | 1983-03-19 | Dengensha Mfg Co Ltd | Spot welding method and controller for steel plates having insulating film |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007061903A (en) * | 2005-08-01 | 2007-03-15 | Honda Motor Co Ltd | Method and apparatus for manufacturing joined body |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0436789B2 (en) | 1992-06-17 |
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