JPH039894Y2 - - Google Patents
Info
- Publication number
- JPH039894Y2 JPH039894Y2 JP6680084U JP6680084U JPH039894Y2 JP H039894 Y2 JPH039894 Y2 JP H039894Y2 JP 6680084 U JP6680084 U JP 6680084U JP 6680084 U JP6680084 U JP 6680084U JP H039894 Y2 JPH039894 Y2 JP H039894Y2
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- control signal
- circuit
- rectifier circuit
- transistor
- 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 33
- 238000004804 winding Methods 0.000 claims description 21
- 239000010953 base metal Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 description 20
- 239000003990 capacitor Substances 0.000 description 10
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 9
- 230000004044 response Effects 0.000 description 5
- 239000000945 filler Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000009499 grossing Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 230000004043 responsiveness Effects 0.000 description 3
- 230000010363 phase shift Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
Landscapes
- Arc Welding Control (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は、複数個の電極により母材の溶接部
を溶接する多電極式TIG溶接装置に関する。[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a multi-electrode TIG welding device that welds a welded portion of a base material using a plurality of electrodes.
従来、多電極式TIG溶接装置は、たとえば第1
図に示すように構成されており、1はΔ結線され
た1次側巻線である第1〜第3巻線1a,1cの
各接続点2a〜2cが3相交流電源に接続された
電源トランス、3a〜3cはカソードがそれぞれ
トランス1の2次側巻線である第4〜第6巻線1
d〜1fに接続された第1〜第3ダイオード、3
b〜3fはアノードやそれぞれ第1〜第3ダイオ
ード3a〜3cのカソードに接続され第1〜第3
ダイオード3a〜3cとともに3相全波整流回路
3が構成されている。
Conventionally, multi-electrode TIG welding equipment, for example,
It is configured as shown in the figure, and 1 is a Δ-connected primary winding. Connection points 2a to 2c of the first to third windings 1a and 1c are connected to a three-phase AC power source. The transformers 3a to 3c are the fourth to sixth windings 1 whose cathodes are the secondary windings of the transformer 1, respectively.
1st to 3rd diodes connected to d to 1f, 3
b to 3f are connected to the anodes and cathodes of the first to third diodes 3a to 3c, respectively;
A three-phase full-wave rectifier circuit 3 is configured together with the diodes 3a to 3c.
4は両端が第1〜第3ダイオード3a〜3cの
アノードおよび第4〜第6ダイオード3d〜3f
のカソードに接続された平滑コンデンサ、5はエ
ミツタがコンデンサ4の一端に接続されたNPN
型のトランジスタからなるシリースレギユレー
タ、6は一端がレギユレータ5のコレクタに接続
され溶接電流を検出して検出信号出力端子から検
出信号を出力する電流検出器、7は検出信号入力
端子が検出器6の検出信号出力端子に接続された
制御回路であり、レギユレータ5のトランジスタ
のベースにベース制御信号を出力するとともに、
後述の第1,第2スイツチングトランジスタのベ
ースに数100Hzの低周波制御信号を出力する。 4 has both ends the anodes of the first to third diodes 3a to 3c and the fourth to sixth diodes 3d to 3f.
5 is an NPN whose emitter is connected to one end of capacitor 4.
6 is a current detector whose one end is connected to the collector of regulator 5 and which detects the welding current and outputs a detection signal from the detection signal output terminal; 7 is a detector whose detection signal input terminal is connected to the collector of regulator 5; This is a control circuit connected to the detection signal output terminal of the regulator 5, and outputs a base control signal to the base of the transistor of the regulator 5.
A low frequency control signal of several 100 Hz is output to the bases of first and second switching transistors, which will be described later.
8,9はエミツタが検出器6の他端に接続され
前記低周波制御信号によりスイツチングする
NPN型の第1,第2スイツチングトランジスタ
(以下第1,第2トランジスタという)、10,1
1は一端それぞれ第1,第2トランジスタ8,9
のコレクタに接続された第1,第2結合コイル、
12,13はそれぞれ両結合コイル10,11に
接続されたTIG溶接用トーチからなる第1,第2
電極、14は母材であり、第4〜第6ダイオード
3d〜3fのカソードに接続され、該母材14の
各接続部がそれぞれ両電極12,13により溶接
される。 Emitters 8 and 9 are connected to the other end of the detector 6 and are switched by the low frequency control signal.
NPN type first and second switching transistors (hereinafter referred to as first and second transistors), 10, 1
1 is the first and second transistors 8 and 9 at one end, respectively.
first and second coupling coils connected to the collector of the
12 and 13 are first and second TIG welding torches connected to both coupling coils 10 and 11, respectively.
The electrode 14 is a base material, which is connected to the cathodes of the fourth to sixth diodes 3d to 3f, and each connection portion of the base material 14 is welded by both electrodes 12 and 13, respectively.
そして母材14を溶接する場合、制御回路7か
ら出力されるベース制御信号によりレギユレータ
5のトランジスタがオンするとともに、制御回路
7から第1トランジスタ8のベースに数100Hzの
低周波制御信号が出力されて第2図aに示すよう
に第1トランジスタ8がオン、オフを繰り返し、
第1トランジスタ8のオン期間に、整流回路3か
らの電流が整流回路3,母材14,第1電極1
2,第1結合コイル10,第1トランジスタ8の
コレクタ,エミツタ,検出器6,レギユレータ
5,整流回路3からなる直列回路を流れ、第1電
極12と母材14との間にアークが発生し、溶加
材が溶融して第1電極12による母材14の溶接
部の溶接が行なわれる。 When welding the base material 14, the transistor of the regulator 5 is turned on by the base control signal output from the control circuit 7, and a low frequency control signal of several 100 Hz is output from the control circuit 7 to the base of the first transistor 8. As shown in FIG. 2a, the first transistor 8 is repeatedly turned on and off.
During the ON period of the first transistor 8, the current from the rectifier circuit 3 flows through the rectifier circuit 3, the base material 14, and the first electrode 1.
2, an arc is generated between the first electrode 12 and the base material 14 through a series circuit consisting of the first coupling coil 10, the collector and emitter of the first transistor 8, the detector 6, the regulator 5, and the rectifier circuit 3. , the filler metal is melted and the welded portion of the base metal 14 is welded by the first electrode 12.
つぎに、制御回路7から第2トランジスタ9の
ベースに前記の第1トランジスタ8への低周波制
御信号を反転した波形の低周波制御信号が出力さ
れ、第2図bに示すように、第2トランジスタ9
が第1トランジスタ8のオン,オフ動作とは逆に
オン,オフを繰り返し、第2トランジスタ9のオ
ン期間,すなわち第1トランジスタ8のオフ期間
に、整流回路3からの電流が整流回路3,母材1
4,第2電極13,第2結合コイル11,第2ト
ランジスタ9のコレクタ,エミツタ,検出器6,
レギユレータ5,整流回路3からなる直列回路を
流れ、第2電極13と母材14との間にアークが
発生し、溶加材が溶融して第2電極13による母
材14の前記溶接部の溶接が行なわれ、これらの
動作が繰り返され、母材14と両電極12,13
との間に第2図Cに示すような所定レベルIの溶
接電流が連続的に流れ、両電極12,13が溶接
部に沿つて走行し、両電極12,13による母材
14の各溶接部それぞれの溶接が交互に行なわれ
る。 Next, a low frequency control signal having a waveform obtained by inverting the low frequency control signal sent to the first transistor 8 is outputted from the control circuit 7 to the base of the second transistor 9, and as shown in FIG. transistor 9
is repeatedly turned on and off, contrary to the on and off operations of the first transistor 8, and during the on period of the second transistor 9, that is, the off period of the first transistor 8, the current from the rectifier circuit 3 flows into the rectifier circuit 3, the motherboard. Material 1
4, second electrode 13, second coupling coil 11, collector and emitter of second transistor 9, detector 6,
The arc flows through a series circuit consisting of the regulator 5 and the rectifier circuit 3, and an arc is generated between the second electrode 13 and the base metal 14, and the filler metal melts to form the welded portion of the base metal 14 by the second electrode 13. Welding is performed and these operations are repeated to weld the base material 14 and both electrodes 12, 13.
A welding current of a predetermined level I as shown in FIG. Each part is welded alternately.
なお、アークスタートの際、図示されていない
が、両結合コイル10,11と母材14との間に
高周波高電圧電源を接続し、前記電源による高周
波高電圧が母材14と両電極12,13との間に
印加されて両電極12,13,母材14間にアー
クが発生し、溶接が開始される。 In addition, at the time of arc start, although not shown, a high frequency high voltage power source is connected between both coupling coils 10 and 11 and the base material 14, and the high frequency high voltage from the power source is applied to the base material 14, both electrodes 12, 13, an arc is generated between the electrodes 12, 13 and the base material 14, and welding is started.
このとき、検出器6により母材14,両電極1
2,13間を流れる溶接電流が検出されて検出信
号が制御回路7に出力され、前記溶接電流が一定
になるように、制御回路7からレギユレータ5の
トランジスタへのベース制御信号が制御され、母
材14と両電極12,13との間を流れる溶接電
流が定電流制御される。 At this time, the detector 6 detects the base material 14 and both electrodes 1.
The welding current flowing between 2 and 13 is detected and a detection signal is output to the control circuit 7, and the control circuit 7 controls the base control signal to the transistor of the regulator 5 so that the welding current is constant. The welding current flowing between the material 14 and both electrodes 12, 13 is controlled at a constant current.
また、両電極12,13と母材14との間に交
互にアークが発生するため、母材14および両電
極12,13間それぞれに同時に通電してアーク
を発生した場合に生じる一方のアークへの他方の
アークの引き込み現象、すなわちアークの干渉が
防止され、均一な溶接ビードが形成される。 In addition, since arcs are generated alternately between both electrodes 12 and 13 and the base metal 14, if an arc is generated by simultaneously applying electricity between the base metal 14 and both electrodes 12 and 13, one of the arcs will occur. The pull-in phenomenon of the other arc, that is, the interference of the arcs, is prevented, and a uniform weld bead is formed.
しかし、第1図の場合は簡単のためにレギユレ
ータ5を1個のトランジスタにより構成したが、
通常は溶接電流が大電流であるため、複数個のト
ランジスタを並列に設けてレギユレータ5を構成
しなければならず、しかもレギユレータ5の各ト
ランジスタが発熱するため、これらのトランジス
タの冷却手段が必要になり、構成が複雑になると
ともに、平滑コンデンサ4が電極12,13,母
材14への通電回路側にあるため、コンデンサ4
も大容量のものを使用しなければならず、トラン
ス1も大型になり、装置全体が大型化するという
欠点がある。 However, in the case of FIG. 1, the regulator 5 is composed of one transistor for simplicity.
Since the welding current is normally a large current, the regulator 5 must be constructed by installing multiple transistors in parallel, and each transistor in the regulator 5 generates heat, so a means of cooling these transistors is required. The structure becomes complicated, and since the smoothing capacitor 4 is located on the side of the current-carrying circuit to the electrodes 12, 13 and the base material 14, the capacitor 4
However, it is necessary to use a large-capacity transformer, and the transformer 1 is also large, resulting in an increase in the size of the entire device.
また、レギユレータ5のトランジスタのベース
制御信号を制御して溶接電流の定電流制御を行な
つているため、溶接電流の変動に対する応答が遅
く、溶接電流の迅速な制御を行なえないという欠
点がある。 Further, since constant current control of the welding current is performed by controlling the base control signal of the transistor of the regulator 5, there is a drawback that the response to fluctuations in the welding current is slow and prompt control of the welding current cannot be performed.
この考案は、前記の点に留意してなされたもの
であり、構成の簡素化および小型化を図り、応答
性よく溶接電流を定電流制御することを目的とす
る。
This invention has been made with the above-mentioned points in mind, and aims to simplify and downsize the configuration and to perform constant current control of the welding current with good responsiveness.
〔考案の構成〕
この考案は、直流電源と、高周波制御信号およ
び低周波制御信号を出力する制御回路と、前記電
源に接続され前記高周波制御信号によりスイツチ
ングして前記電源からの直流を高周波交流として
出力する高周波スイツチング回路と、1次巻線が
前記スイツチング回路に接続された高周波トラン
スと、前記トランスの2次巻線に接続され前記両
巻線を介した前記高周波交流を整流する整流回路
と、前記整流回路に接続され前記低周波制御信号
により順次にスイツチングする複数個の低周波ス
イツチング素子と、前記各素子を介して母材との
間に前記整流回路からの電流が順次に通流されて
前記母材の溶接部を順次に溶接する複数個の電極
とを備えた多電極式TIG溶接装置である。[Structure of the invention] This invention includes a DC power supply, a control circuit that outputs a high frequency control signal and a low frequency control signal, and a control circuit that is connected to the power supply and switches according to the high frequency control signal to convert the DC from the power supply into high frequency AC. a high-frequency switching circuit for outputting a high-frequency switching circuit; a high-frequency transformer having a primary winding connected to the switching circuit; and a rectifier circuit connected to a secondary winding of the transformer for rectifying the high-frequency alternating current through both windings; A current from the rectifier circuit is sequentially passed between a plurality of low frequency switching elements connected to the rectifier circuit and sequentially switched in response to the low frequency control signal and the base material via each of the elements. This is a multi-electrode TIG welding device that includes a plurality of electrodes that sequentially weld the welded portions of the base metal.
したがつて、この考案の多電極式TIG溶接装置
によると、制御回路からの高周波制御信号により
スイツチングする高周波スイツチング回路を設
け、高周波トランスの1次巻線、2次巻線を介し
て前記高周波スイツチング回路による高周波交流
を整流する整流回路とを設けるとともに、前記制
御回路からの低周波制御信号により順次にスイツ
チングして母材および各電極間に前記整流回路か
らの電流を順次に通流する複数個の低周波スイツ
チング素子を設けたことにより、従来のようなシ
リースレギユレータが不要となり、平滑コンデン
サが小容量のもので済み、しかも大型の電源トラ
ンスも不要となり、構成の簡素化および小型化を
図ることができる。
Therefore, according to the multi-electrode TIG welding device of this invention, a high-frequency switching circuit is provided which performs switching in response to a high-frequency control signal from a control circuit, and the high-frequency switching circuit performs switching via the primary and secondary windings of a high-frequency transformer. a rectifier circuit that rectifies high-frequency alternating current generated by the circuit, and a plurality of circuits that are sequentially switched in response to a low-frequency control signal from the control circuit to sequentially pass current from the rectifier circuit between the base material and each electrode. The low-frequency switching element eliminates the need for a conventional series regulator, requires a small-capacity smoothing capacitor, and eliminates the need for a large power transformer, simplifying and downsizing the configuration. can be achieved.
さらに、制御回路からの高周波制御信号の周波
数を制御して高周波スイツチング回路のスイツチ
ング周波数を制御することにより、溶接電流の変
動に対する定電流制御の応答を早くすることがで
き、応答性よく溶接電流を定電流制御することが
できる。 Furthermore, by controlling the frequency of the high-frequency control signal from the control circuit and the switching frequency of the high-frequency switching circuit, the response of constant current control to fluctuations in the welding current can be made faster, and the welding current can be adjusted with good responsiveness. Constant current control is possible.
つぎに、この考案を、その1実施例を示した第
3図とともに詳細に説明する。
Next, this invention will be explained in detail with reference to FIG. 3 showing one embodiment thereof.
同図において、15は商用交流電源、16は両
入力端子が電源15の両端に接続され電源15の
商用交流を整流する直流電源としてのダイオード
ブリツジ整流回路、17は両端が整流回路16の
正,負出力端子に接続された平滑コンデンサ、1
8は後述の第3,第4トランジスタのベースに位
相が180゜ずれた高周波制御信号をそれぞれ出力し
第5,第6トランジスタのベースに位相が180゜ず
れた数100Hzの低周波制御信号を出力する制御回
路、19はNPN型の第3,第4トランジスタ1
9a,19bからなる高周波スイツチング回路で
あり、両トランジスタ19a,19bそれぞれの
ベースが制御回路18の両高周波制御信号出力端
子にそれぞれ接続されるとともに、両エミツタが
整流回路16の負出力端子に接続されており、前
記高周波制御信号により両トランジスタ19a,
19bが交互にオン,オフを繰り返し、整流回路
16,コンデンサ17により整流、平滑された直
流を高周波交流に変換する。 In the figure, 15 is a commercial AC power supply, 16 is a diode bridge rectifier circuit with both input terminals connected to both ends of the power supply 15 as a DC power supply for rectifying the commercial AC of the power supply 15, and 17 is a diode bridge rectifier circuit whose both ends are connected to the positive side of the rectifier circuit 16. , a smoothing capacitor connected to the negative output terminal, 1
8 outputs a high frequency control signal with a phase shift of 180 degrees to the bases of the third and fourth transistors, which will be described later, and outputs a low frequency control signal of several hundred Hz with a phase shift of 180 degrees to the bases of the fifth and sixth transistors. 19 is the third and fourth transistor 1 of NPN type.
This is a high frequency switching circuit consisting of transistors 9a and 19b, the bases of both transistors 19a and 19b are respectively connected to both high frequency control signal output terminals of the control circuit 18, and both emitters are connected to the negative output terminal of the rectifier circuit 16. The high frequency control signal causes both transistors 19a,
19b alternately turns on and off, converting the DC rectified and smoothed by the rectifier circuit 16 and capacitor 17 into high-frequency AC.
20は1次巻線20aの一端および他端がそれ
ぞれ第3,第4トランジスタ19a,19bのコ
レクタに接続されるとともに1次巻線20aの中
間タツプが整流回路16の正出力端子に接続され
た高周波トランス、21はそれぞれカソードがト
ランス20の2次巻線20bの両端に接続されア
ノードが互いに接続された整流用第7,第8ダイ
オード21a,21bからなりトランス20の両
巻線20a,20bを介した高周波スイツチング
回路19による高周波交流を整流する整流回路、
22,23はそれぞれベースが制御回路18の両
低周波制御信号出力端子に接続されるとともにエ
ミツタが第7ダイオード21aのアノードに接続
され、前記低周波制御信号により交互にオン,オ
フを繰り返す低周波スイツチング素子である
NPN型の第5,第6トランジスタ、24は一端
が2次巻線20bの中間タツプに接続されるとと
もに検出信号出力端子が制御回路18の検出信号
入力端子に接続され溶接電流を検出して検出信号
を出力する電流検出器、25,26は一端が第
7,第8トランジスタ22,23のコレクタに接
続された第3,第4結合コイル、27,28は両
結合コイル25,26に接続されたTIG溶接用ト
ーチからなる第3,第4電極、29は母材であ
り、検出器24の他端に接続され、母材29の各
溶接部それぞれが両電極27,28により溶接さ
れる。 20, one end and the other end of the primary winding 20a are connected to the collectors of the third and fourth transistors 19a and 19b, respectively, and the intermediate tap of the primary winding 20a is connected to the positive output terminal of the rectifier circuit 16. The high frequency transformer 21 is composed of seventh and eighth rectifying diodes 21a and 21b, each having a cathode connected to both ends of the secondary winding 20b of the transformer 20 and an anode connected to each other. a rectifier circuit that rectifies the high frequency alternating current by the high frequency switching circuit 19 through the
22 and 23 each have a base connected to both low frequency control signal output terminals of the control circuit 18, and an emitter connected to the anode of the seventh diode 21a, and are low frequency signals that are alternately turned on and off by the low frequency control signal. It is a switching element.
The NPN type fifth and sixth transistors 24 have one end connected to the intermediate tap of the secondary winding 20b and a detection signal output terminal connected to the detection signal input terminal of the control circuit 18 to detect the welding current. A current detector that outputs a signal, 25 and 26 are third and fourth coupling coils whose one ends are connected to the collectors of the seventh and eighth transistors 22 and 23, and 27 and 28 are connected to both coupling coils 25 and 26. The third and fourth electrodes 29 made of a TIG welding torch are the base metal, and are connected to the other end of the detector 24, and each welding part of the base metal 29 is welded by both electrodes 27, 28.
つぎに、前記実施例の動作について説明する。 Next, the operation of the above embodiment will be explained.
まず、制御回路18から出力される高周波制御
信号により第3,第4トランジスタ19a,19
bが交互にオン,オフを繰り返し、第3トランジ
スタ19aのオン期間,すなわち第4トランジス
タ19bのオフ期間に、整流回路16およびコン
デンサ17により整流、平滑された電流が1次巻
線20aの中間タツプおよび一端,第3トランジ
スタ19aのコレクタ,エミツタ、整流回路16
を流れるとともに、第4トランジスタ19bのオ
ン期間、すなわち第3トランジスタ19aのオフ
期間に、整流回路16およびコンデンサ17によ
り整流、平滑された電流が1次巻線20aの中間
タツプおよび他端、第4トランジスタ19bのコ
レクタ、エミツタ、整流回路16を流れ、これら
の動作が繰り返され、高周波スイツチング回路1
9により直流が高周波交流に変換されてトランス
20の1次巻線20aに高周波交流電流が流れ、
整流回路21によりトランス20の両巻線20
a,20bを介した高周波交流が整流される。 First, a high frequency control signal output from the control circuit 18 causes the third and fourth transistors 19a, 19
b alternately turns on and off, and during the on period of the third transistor 19a, that is, the off period of the fourth transistor 19b, the current rectified and smoothed by the rectifier circuit 16 and the capacitor 17 flows to the intermediate tap of the primary winding 20a. and one end, the collector and emitter of the third transistor 19a, and the rectifier circuit 16
At the same time, during the on period of the fourth transistor 19b, that is, the off period of the third transistor 19a, the current rectified and smoothed by the rectifier circuit 16 and the capacitor 17 flows through the intermediate tap and the other end of the primary winding 20a, and the fourth The current flows through the collector, emitter, and rectifier circuit 16 of the transistor 19b, and these operations are repeated until the high frequency switching circuit 1
9 converts the direct current into high-frequency alternating current, and the high-frequency alternating current flows through the primary winding 20a of the transformer 20.
Both windings 20 of the transformer 20 are connected by the rectifier circuit 21.
The high frequency alternating current passing through a and 20b is rectified.
そして、制御回路18からベースに出力される
低周波制御信号により第5,第6トランジスタ2
2,23が交互にオン,オフを繰り返し、第5ト
ランジスタ22のオン期間、すなわち第6トラン
ジスタ23のオフ期間に、整流回路21からの電
流が整流回路21,検出器24,母材29,第3
電極27,第3結合コイル25,第5トランジス
タ22のコレクタ,エミツタ、整流回路21から
なる直列回路を流れ、第3電極27,母材29間
にアークが発生して溶加材が溶融するとともに、
第6トランジスタ23のオン期間,すなわち第5
トランジスタ22のオフ期間に、整流回路21か
らの電流が整流回路21,検出回路24,母材2
9,第4電極28,第4結合コイル26,第6ト
ランジスタ23のコレクタ,エミツタ,整流回路
21からなる直列回路を流れ、第4電極28,母
材29間にアークが発生して溶加材が溶融し、こ
れらの動作が繰り返され、両電極27,28それ
ぞれと母材29との間に交互にアークが発生して
母材29,両電極27,28間に所定レベルの溶
接電流が連続的に流れ、両電極27,28が母材
29の溶接部に沿つて走行し、両電極27,28
による母材29の1個の溶接部の溶接が交互に行
なわれる。 Then, the fifth and sixth transistors 2 are controlled by a low frequency control signal output from the control circuit 18 to the base.
2 and 23 alternately turn on and off, and during the on period of the fifth transistor 22, that is, the off period of the sixth transistor 23, the current from the rectifier circuit 21 flows through the rectifier circuit 21, the detector 24, the base material 29, and the sixth transistor 23. 3
Flowing through a series circuit consisting of the electrode 27, the third coupling coil 25, the collector and emitter of the fifth transistor 22, and the rectifier circuit 21, an arc is generated between the third electrode 27 and the base metal 29, and the filler metal melts. ,
The on period of the sixth transistor 23, that is, the fifth
During the off period of the transistor 22, the current from the rectifier circuit 21 flows through the rectifier circuit 21, the detection circuit 24, and the base material 2.
9, the fourth electrode 28, the fourth coupling coil 26, the collector of the sixth transistor 23, the emitter, and the rectifier circuit 21. An arc is generated between the fourth electrode 28 and the base metal 29, and the filler metal melts and these operations are repeated, arcs are generated alternately between each of the electrodes 27 and 28 and the base metal 29, and a welding current of a predetermined level is continuously generated between the base metal 29 and the electrodes 27 and 28. flow, both electrodes 27 and 28 run along the welded part of base metal 29, and both electrodes 27 and 28
The welding of one welded portion of the base material 29 is performed alternately.
なお、アークスタートは前記第1図の場合と同
じ様に、高周波高電圧電源の接続により行なわれ
る。 Incidentally, the arc start is performed by connecting a high frequency, high voltage power source in the same manner as in the case of FIG. 1 above.
このとき、検出器24により母材29,両電極
27,28間を流れる溶接電流が検出されて検出
信号が制御回路18に出力され、前記溶接電流が
一定になるように、制御回路18から第3,第4
トランジスタ19a,19bへの高周波制御信号
の周波数が制御され、両トランジスタ19a,1
9bのオン,オフの繰り返し周波数、すなわちス
イツチング周波数が制御されて1次巻線20aを
流れる高周波交流電流が制御され、溶接電流が定
電流制御される。 At this time, the welding current flowing between the base metal 29 and both electrodes 27 and 28 is detected by the detector 24, and a detection signal is output to the control circuit 18. 3, 4th
The frequency of the high frequency control signal to transistors 19a, 19b is controlled, and both transistors 19a, 1
The on/off repetition frequency of the coil 9b, that is, the switching frequency, is controlled to control the high frequency alternating current flowing through the primary winding 20a, and the welding current is controlled to be a constant current.
したがつて、前記実施例によると、トランスに
より1次側の定電流制御回路と負荷回路とを切り
離したため、前記したシリースレギユレータ5が
不要になるとともに、コンデンサ17が小容量で
済み、大容量のコンデンサが不要となり、しかも
高周波トランス20が前記した電源トランス1に
比べて小型であるため、構成の簡素化および小型
化を図ることができる。 Therefore, according to the embodiment described above, since the constant current control circuit and the load circuit on the primary side are separated by the transformer, the series regulator 5 described above is not required, and the capacitor 17 can be of small capacity and large. Since a capacitor is not required and the high frequency transformer 20 is smaller than the power transformer 1 described above, the structure can be simplified and downsized.
さらに、制御回路18からの高周波制御信号の
周波数を制御することにより、溶接電流を一定に
制御でき、しかも高周波制御信号による第3,第
4トランジスタ19a,19bのスイツチング周
波数が非常に高いため、溶接電流の変動に対する
応答性に優れている。 Furthermore, by controlling the frequency of the high-frequency control signal from the control circuit 18, the welding current can be controlled at a constant level, and since the switching frequency of the third and fourth transistors 19a and 19b by the high-frequency control signal is very high, the welding Excellent responsiveness to current fluctuations.
なお、電極は3個以上であつても、この考案を
同様に実施することができる。 Note that this invention can be implemented in the same manner even if there are three or more electrodes.
第1図は従来の多電極式TIG溶接装置の結線
図、第2図a〜cは第1図の動作説明用タイミン
グチヤート、第3図はこの考案の多電極式TIG溶
接装置の1実施例の結線図である。
16…ダイオードブリツジ整流回路、18…制
御回路、19…高周波スイツチング回路、20…
高周波トランス、20a,20b…1次,2次巻
線、21…整流回路、22,23…第5,第6ト
ランジスタ、27,28…電極、29…母材。
Fig. 1 is a wiring diagram of a conventional multi-electrode TIG welding device, Fig. 2 a to c is a timing chart for explaining the operation of Fig. 1, and Fig. 3 is an embodiment of the multi-electrode TIG welding device of this invention. FIG. 16... Diode bridge rectifier circuit, 18... Control circuit, 19... High frequency switching circuit, 20...
High frequency transformer, 20a, 20b...primary and secondary windings, 21...rectifier circuit, 22, 23...fifth and sixth transistors, 27, 28...electrode, 29...base material.
Claims (1)
信号を出力する制御回路と、前記電源に接続され
前記高周波制御信号によりスイツチングして前記
電源からの直流を高周波交流として出力する高周
波スイツチング回路と、1次巻線が前記スイツチ
ング回路に接続された高周波トランスと、前記ト
ランスの2次巻線に接続され前記両巻線を介した
前記高周波交流を整流する整流回路と、前記整流
回路に接続され前記低周波制御信号により順次に
スイツチングする複数個の低周波スイツチング素
子と、前記各素子を介して母材との間に前記整流
回路からの電流が順次に通流されて前記母材の溶
接部を順次に溶接する複数個の電極とを備えた多
電極式TIG溶接装置。 a DC power supply, a control circuit that outputs a high-frequency control signal and a low-frequency control signal, a high-frequency switching circuit that is connected to the power supply and switches according to the high-frequency control signal to output the DC from the power supply as high-frequency AC; a high frequency transformer having a winding connected to the switching circuit; a rectifier circuit connected to a secondary winding of the transformer to rectify the high frequency alternating current passing through both windings; The current from the rectifier circuit is sequentially passed between a plurality of low frequency switching elements that are sequentially switched in accordance with a control signal and the base metal through each of the elements to sequentially weld the welded portion of the base metal. A multi-electrode TIG welding device equipped with multiple electrodes for welding.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6680084U JPS60181262U (en) | 1984-05-07 | 1984-05-07 | Multi-electrode TIG welding equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6680084U JPS60181262U (en) | 1984-05-07 | 1984-05-07 | Multi-electrode TIG welding equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60181262U JPS60181262U (en) | 1985-12-02 |
JPH039894Y2 true JPH039894Y2 (en) | 1991-03-12 |
Family
ID=30600033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6680084U Granted JPS60181262U (en) | 1984-05-07 | 1984-05-07 | Multi-electrode TIG welding equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60181262U (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63256276A (en) * | 1987-04-15 | 1988-10-24 | Origin Electric Co Ltd | Device for generating multiple plasma arcs |
JPH072147Y2 (en) * | 1991-04-17 | 1995-01-25 | オリジン電気株式会社 | Multi-plasma arc generator |
-
1984
- 1984-05-07 JP JP6680084U patent/JPS60181262U/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS60181262U (en) | 1985-12-02 |
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