JPH03161169A - Arc welding equipment - Google Patents
Arc welding equipmentInfo
- Publication number
- JPH03161169A JPH03161169A JP29900689A JP29900689A JPH03161169A JP H03161169 A JPH03161169 A JP H03161169A JP 29900689 A JP29900689 A JP 29900689A JP 29900689 A JP29900689 A JP 29900689A JP H03161169 A JPH03161169 A JP H03161169A
- Authority
- JP
- Japan
- Prior art keywords
- frequency voltage
- welding
- current
- electrode
- circuit
- 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
- 238000003466 welding Methods 0.000 title claims abstract description 67
- 239000000463 material Substances 0.000 claims description 8
- 230000008878 coupling Effects 0.000 abstract description 7
- 238000010168 coupling process Methods 0.000 abstract description 7
- 238000005859 coupling reaction Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009499 grossing Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
Landscapes
- Arc Welding Control (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は非消耗型の電極を有し、溶接開始時に高周波電
圧を発生してアークを開始するアーク溶接装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an arc welding device that has a non-consumable electrode and generates a high frequency voltage to start an arc at the start of welding.
［従来の技術］
従来アーク溶接では、溶接開始時に電極を溶接母材に接
触させていたが、このような方法では電極が消耗してア
ークが不安定になるという欠点があった。このような欠
点を解消するために、高周波電圧発生回路を用いて溶接
開始時に電極と溶接母材との間に高周波電圧を印加し、
アークを発生させるようにしたアーク溶接装置が用いら
れている。第３図はこのような従来のアーク溶接装置の
一例を示すブロック図である。本図において溶接用変圧
器１は入力した２次側出力を整流ブリッジダイオード２
に与えて整流し、平滑用リアクトル３で平滑している。[Prior Art] In conventional arc welding, an electrode is brought into contact with the welding base material at the start of welding, but this method has the disadvantage that the electrode wears out and the arc becomes unstable. In order to eliminate these drawbacks, a high frequency voltage generation circuit is used to apply a high frequency voltage between the electrode and the welding base material at the start of welding.
Arc welding equipment that generates an arc is used. FIG. 3 is a block diagram showing an example of such a conventional arc welding device. In this figure, the welding transformer 1 receives the input secondary output from the rectifying bridge diode 2.
The smoothing reactor 3 smoothes the flow.
平滑用リアクトル３の出力端はＰＷＭ電流制御回路４に
接続される。ＰＷＭ電流制御回路４は溶接電流設定用の
可変抵抗器５で設定された溶接電流となるように制御す
るものである。ＰＷＭ電流制御回路４の出力端は電流検
出器６に接続され更にカップリングコイル７を介してト
ーチ８の電極９に接続される。トーチ８は起動リレー１
０を付勢するトーチスイッチ１１を有している。電流検
出器６は所定レベルを越える電流を検出するもので、溶
接電流を検出し電流検出信号として電流検出リレーエ２
に与えている。起動リレー１０は常開接点１０ａを有し
、電流検出リレー１２は常閉接点１２ｂを有している。The output end of the smoothing reactor 3 is connected to a PWM current control circuit 4. The PWM current control circuit 4 controls the welding current to a value set by a variable resistor 5 for setting the welding current. The output end of the PWM current control circuit 4 is connected to a current detector 6 and further connected to an electrode 9 of a torch 8 via a coupling coil 7. Torch 8 is starting relay 1
It has a torch switch 11 that energizes 0. The current detector 6 detects the current exceeding a predetermined level, and detects the welding current and sends the current detection relay 2 as a current detection signal.
is giving to The starting relay 10 has a normally open contact 10a, and the current detection relay 12 has a normally closed contact 12b.
そして起動リレー１０の常開接点１０ａと電流検出リレ
ー１２の常閉接点１２ｂとは電源と高周波電圧発生回路
１３の一方の電源入力端に直列接続されており、高周波
電圧発生回路１３の他端は接地されている。高周波電圧
発生回路ｌ３は例えば周波数２Ｍｌ｛ｚで３０００ Ｖ
程度の高周波電圧を発生するもので、カップリングコイ
ル７を介してその高周波電圧を溶接電圧に重畳して電極
９と溶接母材１４の間に与えている。ＰＷＭ電流制御回
路４の出力端と整流プリンジダイオード２の一端にはク
リーニングユニットｌ５が接続されている。クリーニン
グユニットｌ５は抵抗とコンデンサの並列回路から成り
、高周波電圧が電流検出器６に流入しないようにするも
のである。The normally open contact 10a of the starting relay 10 and the normally closed contact 12b of the current detection relay 12 are connected in series to a power supply and one power input terminal of the high frequency voltage generating circuit 13, and the other end of the high frequency voltage generating circuit 13 is connected in series. Grounded. For example, the high frequency voltage generation circuit l3 generates 3000 V at a frequency of 2Ml{z.
The high frequency voltage is superimposed on the welding voltage via the coupling coil 7 and applied between the electrode 9 and the welding base material 14. A cleaning unit 15 is connected to the output end of the PWM current control circuit 4 and one end of the rectifier Pringe diode 2. The cleaning unit 15 is composed of a parallel circuit of a resistor and a capacitor, and prevents high frequency voltage from flowing into the current detector 6.
さて可変抵抗器５によって溶接電流を設定した後、第４
図（ａ）に示す時刻１，にトーチスイッチ１１を閉戒す
ると起動リレー１０のリレーコイルが付勢される。従っ
てその常開接点１０ａが閉威し、高周波電圧発生回路１
３に通電される。高周波電圧発生回路１３は高周波電圧
をカップリングコイル７を介して電極９上に印加して、
電極９と溶接母材１４間でアークを発生させ溶接を開始
する。Now, after setting the welding current using the variable resistor 5, the fourth
When the torch switch 11 is closed at time 1 shown in Figure (a), the relay coil of the starting relay 10 is energized. Therefore, the normally open contact 10a closes, and the high frequency voltage generating circuit 1
3 is energized. The high frequency voltage generation circuit 13 applies a high frequency voltage to the electrode 9 via the coupling coil 7,
An arc is generated between the electrode 9 and the welding base material 14 to start welding.
そして第４図（ｂ）に示す時刻ｔ２に電流検出器６が溶
接電流の発生を検知すると、その出力に基づき電流検出
リレー１２のリレーコイルが付勢される。When the current detector 6 detects the generation of a welding current at time t2 shown in FIG. 4(b), the relay coil of the current detection relay 12 is energized based on the output.
従って常閉接点１２ｂが開放し電源人力が遮断される。Therefore, the normally closed contact 12b is opened and the power source is cut off.
そのため高周波電圧発生回路１３は動作を停止し、高周
波電圧の印加が終了する。Therefore, the high-frequency voltage generation circuit 13 stops operating, and the application of the high-frequency voltage ends.
従って従来の高周波電圧発生回路では、第４図（Ｃ）に
示すように起動電流が人力されてから溶接電流が検出さ
れるまで高周波電圧が電極に連続して印加されることと
なる。Therefore, in the conventional high-frequency voltage generating circuit, the high-frequency voltage is continuously applied to the electrodes after the starting current is manually applied until the welding current is detected, as shown in FIG. 4(C).
１発明が解決しようとする課題〕
このような従来の非消耗性の電極式アーク溶接装置にあ
っては、溶接電流を検出するまで連続して高周波電圧が
発生するため、高周波ノイズが溶接装置内部の各部品及
び外部機器に大きな影響を与えるという欠点があった。1. Problems to be Solved by the Invention] In such conventional non-consumable electrode type arc welding equipment, high frequency voltage is generated continuously until the welding current is detected, so high frequency noise is generated inside the welding equipment. The disadvantage was that it had a large effect on each component of the system and external equipment.
本発明はこのような従来のアーク溶接装置の問題点に鑑
みてなされたものであって、高周波による弊害を防止で
きるようにすることを技術的課題とする。The present invention has been made in view of the problems of the conventional arc welding apparatus, and its technical object is to prevent the harmful effects caused by high frequencies.
本発明は電極と溶接母材との間に高周波電圧を印加する
ことによりアークを発生させアーク溶接を開始するアー
ク溶接装置であって、アーク溶接の溶接電流の発生を検
知する電流検出器と、溶接開始時に動作を開始し電流検
出器より溶接電流が検出されるまでの間電源を断続する
断続開閉回路と、断続開閉回路の出力に基づいて高周波
電圧を断続して発生させる高周波電圧発生回路と、電極
に供給される電圧に高周波電圧発生回路から与えられる
高周波電圧を重畳する電圧重畳手段とを具備することを
特徴とするものである。The present invention is an arc welding device that generates an arc and starts arc welding by applying a high frequency voltage between an electrode and a welding base material, and includes a current detector that detects the generation of welding current during arc welding; An intermittent switching circuit that starts operating at the start of welding and cuts off the power until the welding current is detected by a current detector, and a high-frequency voltage generation circuit that generates a high-frequency voltage intermittently based on the output of the intermittent switching circuit. , a voltage superimposing means for superimposing a high frequency voltage applied from a high frequency voltage generation circuit on the voltage supplied to the electrode.
このような特徴を有する本発明によれば、溶接開始時に
は電源は断続開閉回路で断続されて高周波電圧発生回路
に出力される。従って高周波電圧発生回路は高周波電圧
を断続して発生させ、電圧重畳手段に与えている。その
高周波電圧は電圧重畳手段によって電極の溶接電圧に重
畳される。そしてアーク溶接が開始されれば高周波電圧
の発生を停止している。According to the present invention having such characteristics, at the start of welding, the power source is interrupted by the intermittent switching circuit and outputted to the high frequency voltage generating circuit. Therefore, the high frequency voltage generating circuit generates a high frequency voltage intermittently and applies it to the voltage superimposing means. The high frequency voltage is superimposed on the welding voltage of the electrode by a voltage superimposing means. When arc welding is started, the generation of high frequency voltage is stopped.
第１図は本発明の一実施例によるアーク溶接装置を示す
ブロック図であり、前述した従来例と同一部分は同一符
号を付して詳細な説明を省略する。FIG. 1 is a block diagram showing an arc welding apparatus according to an embodiment of the present invention, and the same parts as in the conventional example described above are given the same reference numerals and detailed explanations will be omitted.
本図において、溶接用変圧器１は一次側からの入力を降
圧して２次側出力として整流ブリッジダイオード２に与
える。整流ブリッジダイオード２は２次側出力を整流し
平滑用リアクトル３によって平滑してＰＷＭ電流制御回
路４に与えられる。ＰＷＭ電流制御回路４はパルス幅変
調方式により溶接電流設定用の可変抵抗器５で設定され
た溶接電流となるように制御するものであって、その出
力端は電流検出器６及び電圧重畳手段であるカップリン
グコイル７を介してトーチ８の電極９に与えられる。電
流検出器６は所定レベルを越える電流を検出する回路で
、溶接電流を検出して電流検出リレー１２を付勢するも
のである。又クリーニングユニッ｝１５が電流検出器６
の出力端と整流ブリッジダイオード２に接続され、及び
トーチスイッチｌ１によって起動リレー１０を付勢する
ことは前述した従来例と同様である。In this figure, a welding transformer 1 steps down the input from the primary side and supplies it to a rectifying bridge diode 2 as a secondary output. The rectifier bridge diode 2 rectifies the secondary side output, smoothes it with the smoothing reactor 3, and supplies the smoothed output to the PWM current control circuit 4. The PWM current control circuit 4 uses a pulse width modulation method to control the welding current to a value set by a variable resistor 5 for setting the welding current, and its output terminal is connected to a current detector 6 and a voltage superimposing means. It is applied to an electrode 9 of a torch 8 via a certain coupling coil 7 . The current detector 6 is a circuit that detects a current exceeding a predetermined level, and detects a welding current to energize the current detection relay 12. Also, the cleaning unit} 15 is the current detector 6.
It is the same as in the conventional example described above that the starting relay 10 is connected to the output end of the rectifying bridge diode 2 and the torch switch l1 is used to energize the starting relay 10.
さて起動リレー１０の常開接点１０ａと電流検出リレー
１２の常閉接点１２ｂとは、電源と断続開閉回路２０の
一方の電源入力端に直列接続されており、断続開閉回路
２０の他端は接地されている。断続開閉回路２０は所定
の周期で電源入力を断続するスイッチング回路であって
、電源入力を断続して高周波電圧発生回路２ｌに与える
ものである。高周波電圧発生回路２１は断続した高周波
電圧を発生し、カップリングコイル７を介して電極９に
高周波電圧を印加するものである。Now, the normally open contact 10a of the starting relay 10 and the normally closed contact 12b of the current detection relay 12 are connected in series to the power supply and one power input terminal of the intermittent switching circuit 20, and the other end of the intermittent switching circuit 20 is grounded. has been done. The intermittent switching circuit 20 is a switching circuit that connects and disconnects power input at a predetermined period, and connects and disconnects the power input to the high frequency voltage generation circuit 2l. The high frequency voltage generating circuit 21 generates an intermittent high frequency voltage and applies the high frequency voltage to the electrode 9 via the coupling coil 7.
さて本実施例の動作について第２図のタイムチャートを
参照しつつ説明する。まず溶接電流設定用の可変抵抗器
５で溶接電流値を設定する。そして第２図（ａ）に示す
ように時刻ｔ４にトーチスイッチ１１を投入すると、起
動リレーｌＯのリレーコイルが付勢されその常間接点１
０ａが閉威し、電源入力が起動リレーｌ１から電流検出
リレー１２を経て断続開閉回路２０に与えられる。Now, the operation of this embodiment will be explained with reference to the time chart of FIG. First, a welding current value is set using the variable resistor 5 for setting the welding current. Then, as shown in FIG. 2(a), when the torch switch 11 is turned on at time t4, the relay coil of the starting relay IO is energized, and the
0a is closed, and power input is applied from the starting relay l1 to the intermittent switching circuit 20 via the current detection relay 12.
さて断続開閉回路２０は第２図（Ｃ）に示すように時刻
ｔ４より動作を開始し、第２図（ｄ）に示すようにスイ
ッチング動作により断続した出力を高周波電圧発生回路
２１に送出する。この出力のデューティ比は所定の値と
し、例えば本実施例では５０％に設定している。こうし
て高周波電圧の印加によって電極９と溶接母材ｌ４の間
でアークが発生し、時刻ｔ，に溶接が開始される。そし
て電流検出器６により溶接電流を検知すると、第２図（
ｂ）に示すように電流検出リレー１２のリレーコイルが
付勢されその常閉接点１２ｂが開放し、断続開閉回路２
０への通電が停止される。従って第２図（ｄ）に示すよ
うに時刻ｔ，に高周波電圧の発生も終了する。その後時
刻ｔ，にトーチ８の電極９を溶接母材１４から離すこと
により溶接を終了する。Now, the intermittent switching circuit 20 starts operating at time t4 as shown in FIG. 2(C), and sends an intermittent output to the high frequency voltage generating circuit 21 by the switching operation as shown in FIG. 2(d). The duty ratio of this output is set to a predetermined value, for example, 50% in this embodiment. In this way, an arc is generated between the electrode 9 and the welding base material l4 by the application of the high frequency voltage, and welding is started at time t. When the welding current is detected by the current detector 6, the welding current is detected as shown in Fig. 2 (
As shown in b), the relay coil of the current detection relay 12 is energized and its normally closed contact 12b is opened, and the intermittent switching circuit 2
0 is stopped. Therefore, as shown in FIG. 2(d), the generation of the high frequency voltage also ends at time t. Thereafter, at time t, the electrode 9 of the torch 8 is separated from the welding base material 14, thereby completing the welding.
尚、本実施例は起動リレーと電流検出リレーとを用いて
断続開閉回路を動作させていたが、トーチスイッチ及び
電流検出器から直接断続開閉回路に出力を与えて断続開
閉回路を動作させるようにしてもよいことはいうまでも
ない。In this embodiment, the intermittent switching circuit was operated using a starting relay and a current detection relay, but the intermittent switching circuit was operated by directly giving an output from the torch switch and current detector to the intermittent switching circuit. Needless to say, it is okay.
［発明の効果］
以上詳細に説明したように本発明によれば、溶接開始時
に高周波電圧を断続して電極に印加することにより、高
周波の発生する時間を短縮している。そのためアーク溶
接装置の各部品及び外部機器に大きな影響を与える高周
波ノイズを大幅に低減することができるという効果が得
られる。[Effects of the Invention] As described above in detail, according to the present invention, by applying a high frequency voltage to the electrode intermittently at the start of welding, the time during which high frequency is generated is shortened. Therefore, it is possible to significantly reduce high frequency noise that greatly affects each component of the arc welding apparatus and external equipment.
第１図は本発明の一実施例によるアーク溶接装置を示す
ブロック図、第２図は本実施例のアーク溶接装置のタイ
ムチャート、第３図は従来のアーク溶接装置の一例を示
すブロック図、第４図は従来のアーク溶接装置のタイム
チャートである。
６・一一一一一電流検出器 ７
１０−・−・一起動リレー
２０−・・・・断続開閉回路
生回路
カップリングコイル
１２−−−−−−・電流検出リレー
２１・・・一・一高周波電圧発FIG. 1 is a block diagram showing an arc welding device according to an embodiment of the present invention, FIG. 2 is a time chart of the arc welding device of this embodiment, and FIG. 3 is a block diagram showing an example of a conventional arc welding device. FIG. 4 is a time chart of a conventional arc welding device. 6.11111 Current detector 7 10---One starting relay 20--Intermittent switching circuit raw circuit coupling coil 12--Current detection relay 21--One -High frequency voltage generation
Claims (1)
とによりアークを発生させアーク溶接を開始するアーク
溶接装置であって、 アーク溶接の溶接電流の発生を検知する電流検出器と、 溶接開始時に動作を開始し前記電流検出器より溶接電流
が検出されるまでの間電源を断続する断続開閉回路と、 前記断続開閉回路の出力に基づいて高周波電圧を断続し
て発生させる高周波電圧発生回路と、前記電極に供給さ
れる電圧に前記高周波電圧発生回路から与えられる高周
波電圧を重畳する電圧重畳手段とを具備することを特徴
とするアーク溶接装置。(1) An arc welding device that generates an arc and starts arc welding by applying a high-frequency voltage between an electrode and a welding base material, comprising a current detector that detects the generation of welding current during arc welding; an intermittent switching circuit that starts operating at the start of welding and cuts off the power until the welding current is detected by the current detector; and a high-frequency voltage generator that generates a high-frequency voltage intermittently based on the output of the intermittent switching circuit. An arc welding device comprising: a circuit; and voltage superimposition means for superimposing a high frequency voltage given from the high frequency voltage generation circuit on the voltage supplied to the electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1299006A JP2540116B2 (en) | 1989-11-16 | 1989-11-16 | Arc welding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1299006A JP2540116B2 (en) | 1989-11-16 | 1989-11-16 | Arc welding equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03161169A true JPH03161169A (en) | 1991-07-11 |
| JP2540116B2 JP2540116B2 (en) | 1996-10-02 |
Family
ID=17867015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1299006A Expired - Fee Related JP2540116B2 (en) | 1989-11-16 | 1989-11-16 | Arc welding equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2540116B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105431248A (en) * | 2013-07-31 | 2016-03-23 | 松下知识产权经营株式会社 | Electric discharge machining system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS617070A (en) * | 1984-06-20 | 1986-01-13 | Hitachi Seiko Ltd | High-frequency high voltage generator for arc welding |
-
1989
- 1989-11-16 JP JP1299006A patent/JP2540116B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS617070A (en) * | 1984-06-20 | 1986-01-13 | Hitachi Seiko Ltd | High-frequency high voltage generator for arc welding |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105431248A (en) * | 2013-07-31 | 2016-03-23 | 松下知识产权经营株式会社 | Electric discharge machining system |
| JPWO2015015759A1 (en) * | 2013-07-31 | 2017-03-02 | パナソニックＩｐマネジメント株式会社 | EDM system |
| CN105431248B (en) * | 2013-07-31 | 2018-05-01 | 松下知识产权经营株式会社 | Electrical discharge machining system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2540116B2 (en) | 1996-10-02 |
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