JPS61266180A - Arc welding equipment - Google Patents

Arc welding equipment

Info

Publication number
JPS61266180A
JPS61266180A JP10729385A JP10729385A JPS61266180A JP S61266180 A JPS61266180 A JP S61266180A JP 10729385 A JP10729385 A JP 10729385A JP 10729385 A JP10729385 A JP 10729385A JP S61266180 A JPS61266180 A JP S61266180A
Authority
JP
Japan
Prior art keywords
arc
welding
current
voltage
base current
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
Application number
JP10729385A
Other languages
Japanese (ja)
Other versions
JPH0613147B2 (en
Inventor
Yoshiro Awano
芳朗 粟野
Hiroshi Suzuki
弘 鈴木
Koji Mizuno
孝治 水野
Shigeo Eguri
成夫 殖栗
Masashi Higashida
東田 賢史
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Toyota Motor Corp
Original Assignee
Mitsubishi Electric Corp
Toyota Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp, Toyota Motor Corp filed Critical Mitsubishi Electric Corp
Priority to JP60107293A priority Critical patent/JPH0613147B2/en
Publication of JPS61266180A publication Critical patent/JPS61266180A/en
Publication of JPH0613147B2 publication Critical patent/JPH0613147B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Arc Welding Control (AREA)

Abstract

PURPOSE:To reduce spatters at the arc regenerating time by passing the second base current during the short circuit term of the body to be welded and wire, then by cutting the second base current and by returning to a pulse current or the first current. CONSTITUTION:A integrating circuit 141, comparators 151, 152 and signal reversing element 161, analog switching element 193 are arranged in the equipment circuits. The welding voltage detected by a voltage detector is inputted into the comparator 151 and the arc maintaining voltage Vc is inputted into the comparator 151 from an arc maintaining voltage setting part 22 as well. When a short circuit is caused between the wire and the body to be welded during the welding, the welding voltage v is reduced and becomes a short circuit voltage. In this case, the second base current IB2 having higher value than that of the first base current IB1 is passed by comparing the welding voltage v and arc holding voltage Vc. At the short circuit releasing time, the second base current IB2 is cut and returned to the original. With this method, the spatter at the arc regenerating time is reduced.

Description

【発明の詳細な説明】 この発明はアーク溶接装置、とくに浴接時に発生するス
パッタ蓋を低減できる溶接*流波形の制御に関するもの
である。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to arc welding equipment, and particularly to control of welding flow waveforms that can reduce spatter generated during bath welding.

〔従来の技術〕[Conventional technology]

第6図は従来の消耗電極式アーク溶接装置の一例を示す
ブロック構成図でアク、図において、(1)は溶接ワイ
ヤで消耗電極、(21は溶接ワイヤ(1)を収納したリ
ール、(3)は被溶接物(以下母材と記す。)(4)は
ワイヤ(11を送給するためのモータ、(5)Uアー−
ク、(6)は溶接トーチ、(7)はパワー素子で構成さ
扛た溶接電流供給部、(8)は電圧検出器、 f91F
i電流検出器、 Qlは目標電圧設定部、00はローパ
スフィルター、0のはパルス幅設定回路、01はパルス
周期設定回路、α養は積分回路、崗は比較器、 01は
信号反転素子、 onはベース電流設定回路、0梯はパ
ルス電流設定回路、  (191) 、 (192Bア
ナログスイツチング累子、(至)はパワー素子駆動回路
、(21は浴接電流)波形コントロールユニットである
。次に動作について説明する。第7図は従来のアーク溶
接装置の各部における電圧及び電流の時間変化を示す波
形図であり、第8図(A)(B)(0)は各々第1図の
A点。
Figure 6 is a block diagram showing an example of a conventional consumable electrode type arc welding device. ) is the workpiece to be welded (hereinafter referred to as the base metal), (4) is the motor for feeding the wire (11), and (5) is the U arc.
(6) is a welding torch, (7) is a welding current supply section composed of a power element, (8) is a voltage detector, f91F
i Current detector, Ql is the target voltage setting section, 00 is the low-pass filter, 0 is the pulse width setting circuit, 01 is the pulse period setting circuit, α is the integrating circuit, H is the comparator, 01 is the signal inverting element, on is the base current setting circuit, the 0th stage is the pulse current setting circuit, (191), (192B analog switching resistor, (to) is the power element drive circuit, (21 is the bath current) waveform control unit.Next, The operation will be explained. Fig. 7 is a waveform diagram showing time changes in voltage and current at each part of a conventional arc welding device, and Fig. 8 (A), (B), and (0) are respectively at point A in Fig. 1. .

B点及び0点における溶滴移行状態を示す説明図である
。まず、パルス周期設定部−でパルス周期(T)毎にH
信号からL信号になるパルス信号VTを積分回路Iに出
力する。積分回路04ではVTがH信号の時積分した信
号なVSとして比較器a9に出力し、また、  VTが
L信号の時積分している信号を零にリーヒットする信号
をvBとして比較器α9に出力する。一方、電圧検出器
(8)で検出した溶接ワイヤ(1)と母材(3)間の電
圧Vをローパスフィルター〇〇で平均化した電圧■と、
目標電圧設定部Onで設定した電圧VQとをパルス幅設
定回路0′IJに入力することにより、パルス幅設定回
路はパルス幅(τP)設定電圧■τPを比較器0□□□
に出力する。
It is an explanatory view showing a droplet transfer state at point B and point 0. First, in the pulse cycle setting section, set H for each pulse cycle (T).
The pulse signal VT, which changes from the signal to the L signal, is output to the integrating circuit I. In the integration circuit 04, VT outputs the time-integrated signal of the H signal as VS to the comparator a9, and also outputs the signal that VT time-integrates the L signal to zero as vB to the comparator α9. Output. On the other hand, a voltage ■ obtained by averaging the voltage V between the welding wire (1) and the base metal (3) detected by the voltage detector (8) with a low-pass filter 〇〇,
By inputting the voltage VQ set in the target voltage setting section On to the pulse width setting circuit 0'IJ, the pulse width setting circuit sets the pulse width (τP) and the set voltage ■τP to the comparator 0□□□
Output to.

上記積分した電圧VSと、パルス幅設定電圧VτPを比
較器α[有]で比較することでパルス期間・ベース期間
判定信号v□を出力する。このパルス期間・ベース期間
判定信号v□はアナログスイッチング系子(192)の
ゲートと信号反転素子αeに入力さ扛る。
The integrated voltage VS and the pulse width setting voltage VτP are compared by a comparator α [present] to output a pulse period/base period determination signal v□. This pulse period/base period determination signal v□ is input to the gate of the analog switching element (192) and the signal inversion element αe.

信号反転素子0[9の出力■Jはアナログスイッチング
素子(191)のゲートに入力さ扛る。″)ま9゜VD
がH信号ならばアナログスイッチング素子(192)が
ONとなL  (191)がOFFとなり、パルス電流
設定回路Q81からパルス電流Ipを出力する。
The output ■J of the signal inversion element 0[9 is input to the gate of the analog switching element (191). ″)Ma9゜VD
If is an H signal, the analog switching element (192) is turned on and the L (191) is turned off, and the pulse current setting circuit Q81 outputs the pulse current Ip.

また、VDがL信号ならばアナログスイッチング素子(
191)がONとなり、  (192)がOF’Fとな
9ベ一ス′醒流設定回路αηからベース′亀流よりを出
力する。このパルス電流IP、及びベース電流IBが合
成さ扛、目標溶接電流波形IQとしてパワー素子駆動回
路翰に入力さnる。このパワー素子駆動回路(至)で目
標溶接電流波形IOと電流検出器(9)から検出さnた
電流1との比較が行なわれる。この比較によって6パワ
一素子駆動回路(イ)から溶接電流供給部(7)に0N
−OFF信号を与える。溶接電流供給部(7)でパワー
素子を0N−OFF信号に従った駆動することで目標電
流波形IOに沿った電流1(破線)をワイヤ(1)に供
給することによってアーク(5)が維持し、母材(3)
が溶接される。
Also, if VD is an L signal, an analog switching element (
191) is turned ON, (192) is OF'F, and the 9 base' current setting circuit αη outputs the base' current. This pulse current IP and base current IB are combined and input to the power element drive circuit as a target welding current waveform IQ. This power element drive circuit (to) compares the target welding current waveform IO with the current 1 detected from the current detector (9). This comparison shows that the welding current supply section (7) is 0N from the 6-power single-element drive circuit (a).
-Gives an OFF signal. The arc (5) is maintained by supplying current 1 (broken line) along the target current waveform IO to the wire (1) by driving the power element in the welding current supply section (7) according to the 0N-OFF signal. Base material (3)
is welded.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

従来のアーク溶接装置は以上のように構成さnているの
で、ワイヤ(1)と母材(3)との距離、即ちアーク長
が短かい時、第8図(A)(B)に示すようにワイヤ(
11が母材(3)と短絡し、短絡時間が長く続いた時次
のパルス電流Ipで溶滴(101)を強制的に焼き切っ
てアーク再生をするため第8図(C)に示すように、ア
ーク再生部で多くの金属蒸気(103)が発生し、その
金属蒸気の蒸気圧によって溶融源及びワイヤ部に残った
溶滴がみださn、多くのスパッタ(102)が発生する
等の問題点があった。
Since the conventional arc welding device is configured as described above, when the distance between the wire (1) and the base metal (3), that is, the arc length is short, Wire (
11 is short-circuited with the base metal (3), and the short-circuit time continues for a long time, the droplet (101) is forcibly burned off by the next pulse current Ip to regenerate the arc, as shown in Fig. 8 (C). In addition, a lot of metal vapor (103) is generated in the arc regeneration section, and the vapor pressure of the metal vapor causes the droplets remaining in the melting source and wire section to spill out, and a lot of spatter (102) is generated. There was a problem.

この発明は上記のような問題点を解消するためになさ扛
たもので1例えばアーク長を短かく保持して短絡が生じ
てもアーク再生時に生じるスパッタを低減できる装置を
得ることを目的とする。
The present invention has been made to solve the above-mentioned problems.It is an object of the present invention to provide a device that can reduce spatter generated during arc regeneration even if a short circuit occurs by keeping the arc length short, for example. .

〔問題点を解決するための手段〕 この発明に係るアーク溶接装置は溶接ワイヤが被溶接物
と短絡していることを検出し、この短絡期間に溶接電流
をなすパルス電流より小さくかつ溶接電流をなす第1ベ
ース電流より大きい第2ベース電流を流し、短絡解除時
に、この第2ベース電流を切9.もとのパルス電流又は
第1ベース電流に戻すようにしたものである。
[Means for solving the problem] The arc welding device according to the present invention detects that the welding wire is short-circuited with the workpiece, and reduces the welding current to a value smaller than the pulse current that forms the welding current during the short-circuit period. 9. A second base current larger than the first base current is applied, and when the short circuit is released, the second base current is turned off.9. The current is returned to the original pulse current or first base current.

〔作用〕[Effect]

この発明におけるアーク溶接装置は、短絡時に第2ベー
ス電流を流すことにより短絡時間を短かくシ、アーク再
生時刻を早めら扛、またアーク再生時の電流値がパルス
電流値IPより低く、かつアーク再生とともに第2ベー
ス電流からもとのベース電流もしくはパルス電流に戻す
ことにより。
The arc welding device according to the present invention shortens the short circuit time by flowing the second base current at the time of a short circuit, and advances the arc regeneration time. By returning the second base current to the original base current or pulse current during regeneration.

アーク再生時のスパッタを低減させる。Reduces spatter during arc regeneration.

〔発明の実施例〕[Embodiments of the invention]

以下、この発明の一実施例を図について説明する。 An embodiment of the present invention will be described below with reference to the drawings.

第1図はこの発明の一実施例によるアーク溶接装置を示
すブロック構成図、第2図はその動作を示す波形図でる
る。また、第3図はこの発明の一実施例に保る周ル」積
分指令回路を示すブロック図である。
FIG. 1 is a block diagram showing an arc welding apparatus according to an embodiment of the present invention, and FIG. 2 is a waveform diagram showing its operation. Furthermore, FIG. 3 is a block diagram showing a circuit integration command circuit according to an embodiment of the present invention.

図において、  (141)は積分回路、  (151
)(152)は比較器、  (161)は信号反転素子
、  (193)はアナログスイッチング素子、Q4は
アーク維持電圧設定部、Eは遅延時間設定部、QaはA
ND回路素子。
In the figure, (141) is an integrating circuit, (151
) (152) is a comparator, (161) is a signal inversion element, (193) is an analog switching element, Q4 is an arc sustaining voltage setting section, E is a delay time setting section, Qa is A
ND circuit element.

(ハ)は第2ベース′屯流設定回路、(至)は周期積分
指令回路、(2)、t1!81はスイッチである。また
、  (261)。
(c) is a second base' torrent flow setting circuit, (to) is a periodic integration command circuit, and (2), t1!81 is a switch. Also, (261).

(267) 、  (268)は信号反転素子、  (
262)はアナログスイッチング素子、  (263)
 [Tフリップ・フロップ、  (264) (270
)はAND回路素子、  (265)は微分回路、  
(266)はバアファー、  (269)はRSフリッ
プΦフロップである。
(267) and (268) are signal inverting elements, (
262) is an analog switching element, (263)
[T flip-flop, (264) (270
) is an AND circuit element, (265) is a differential circuit,
(266) is a buffer, and (269) is an RS flip Φ-flop.

溶接中に第2図のV波形で示すように短絡が生じると、
溶接電圧検出器(8)で検出さnた溶接電圧■はアーク
維持電圧Va (例えば10■)より低い短絡電圧とな
る。そのため、この実施例では溶接電圧■をアーク維持
電圧VCと比較して短絡期間を検出し、その短絡時間に
応じて、第2ベース電流を流し、従来のベース電流期間
及びパルス周期を補正するようにしたものである。
If a short circuit occurs during welding as shown by the V waveform in Figure 2,
The welding voltage (2) detected by the welding voltage detector (8) becomes a short circuit voltage lower than the arc sustaining voltage Va (for example, 10 (10)). Therefore, in this embodiment, the short circuit period is detected by comparing the welding voltage (■) with the arc sustaining voltage VC, and the second base current is supplied in accordance with the short circuit period to correct the conventional base current period and pulse period. This is what I did.

以下、この実施例の動作を第2図に従って説明する。The operation of this embodiment will be explained below with reference to FIG.

電圧検出器(8)から検出した浴接電圧■を比較器(1
51)に入力する。一方、アーク維持′亀圧設定部c!
4からアーク維持電圧■cを比較器(151) K入力
する。比較器(151)で、溶接電圧Vとアーク維持電
圧VQとを比較する。比較器(151)の出力信号Vg
Fi溶接電圧Vがアーク維持電圧vcより低いときH信
号を出力する。比較器(151)の出力信号VBは積分
回路(141)に入力さ扛る。比較器(151)の出力
信号VKがH信号の期間中、積分回%(141)の出力
佃゛号(VF)は積分さjL、  VBがL信号ならば
VFは零にリセットさ扛る。この出力信号VFは、比較
器(152)に入力される。また、遅延時間(τ0)設
定m(ハ)からの出力信号VQも比較器(152)に入
力さ扛る。比較器(152)の出力信号vHは短絡期間
中でかつ積分回路(141)の出力信号VFが出力信号
VQ、よpも大きい場合にH信号を出力する。比較器(
152)の出力信号vHはアナログスイッチング素子(
193)のゲートに、また、信号反転素子(161)お
よび周期積分指令回路(ハ)に入力さ扛る。周期積分指
令回路(ホ)は積分指令信号および積分した信号を零に
リセットする指令信号として出力信号■工を積分回路α
aに出力するとともに、パルス周期設定回路峙をリセッ
ト仕置す機能をもった回路である。つまり1周期積分指
令回路の出力信号VlがH信号の間、積分回路α→の出
力信号VSは積分され、VlがL信号になると積分さr
′L7’c VBは零にリセットさ扛、■工がL信号に
よって、パルス同期設定回路α階はリセット仕置さnる
。周期積分指令回路の出力信号Vlは、短絡が生じない
場合、もしくはベース期間中で短絡が解除(アーり再生
)するならば、パルス周期設定回路α謙からのVT倍信
号同じ信号を出力し、パルス期間までアーク再生が行な
われない場合は、vH倍信号立ち下シ時点でL信号を出
力した後、VT倍信号同じ信号を出力する。即ち、第4
図はこの発明の一実施例に係る周期積分指令回路の動作
を示す波形図であJ)I  O*  TI QI  F
、Q2U各点における波形を示す第3図及び第4図より
この周期積分指令回路の動作を説明すると、アナログス
イッチング素子(2S2)はVTがL信号のときのみO
NさlrL。
The bath contact voltage detected from the voltage detector (8) is detected by the comparator (1
51). On the other hand, arc maintenance 'tortoise pressure setting part c!
The arc sustaining voltage ■c from 4 is inputted to the comparator (151) K. A comparator (151) compares welding voltage V and arc sustaining voltage VQ. Output signal Vg of comparator (151)
When the Fi welding voltage V is lower than the arc sustaining voltage VC, an H signal is output. The output signal VB of the comparator (151) is input to the integrating circuit (141). While the output signal VK of the comparator (151) is an H signal, the output signal (VF) of the integration cycle % (141) is integrated jL, and if VB is an L signal, VF is reset to zero. This output signal VF is input to a comparator (152). Further, the output signal VQ from the delay time (τ0) setting m (c) is also input to the comparator (152). The output signal vH of the comparator (152) outputs an H signal during the short-circuit period and when the output signal VF of the integrating circuit (141) is also larger than the output signal VQ. Comparator (
The output signal vH of the analog switching element (152)
193), and is also input to the signal inverting element (161) and the period integration command circuit (c). The periodic integral command circuit (e) outputs a signal as an integral command signal and a command signal for resetting the integrated signal to zero.
This circuit has the function of outputting to a and resetting the pulse period setting circuit. In other words, while the output signal Vl of the one-period integration command circuit is an H signal, the output signal VS of the integrating circuit α→ is integrated, and when Vl becomes an L signal, it is integrated r
'L7'c VB is reset to zero, and the pulse synchronization setting circuit α floor is reset by the L signal. The output signal Vl of the period integration command circuit outputs the same signal as the VT multiplied signal from the pulse period setting circuit α, if no short circuit occurs or if the short circuit is released (early regeneration) during the base period, If arc regeneration is not performed until the pulse period, an L signal is output at the falling edge of the vH multiplication signal, and then a signal that is the same as the VT multiplication signal is output. That is, the fourth
The figure is a waveform diagram showing the operation of a periodic integration command circuit according to an embodiment of the present invention.
, Q2U The operation of this periodic integration command circuit will be explained with reference to FIGS. 3 and 4, which show waveforms at each point.
NslrL.

vHをTフリップ書フロップ(265)にと9こむ。Divide vH into the T flip flop (265) by 9.

このときTフリップ−フロッグ(265)のQ、端子は
H信号になり、AND回路素子(26りでvHとAND
をとるとvHがL信号に下がったとき、AND回路素子
(264)はL信号におちる。このとき微分回路(26
5)は第4図に示すような信号を出しバアファー(26
6)を通してAND回路素子(270)へ入力さ扛ると
共にTフリップ啼フロック(265)へ入力さ扛る。一
方、Tフリラグフロップ(265)からの出力毎号Q1
は信号反転素子(268)を介しく10) てR−8フリツプ・フロップ(269)のR端子に入力
さ扛る。R−Sフリップ・フロップ(269)の出力端
子Q2はR端子がH信号のときVT倍信号。
At this time, the Q terminal of the T flip-frog (265) becomes an H signal, and the AND circuit element (265) connects vH and AND
When vH falls to the L signal, the AND circuit element (264) falls to the L signal. At this time, the differential circuit (26
5) outputs a signal as shown in FIG.
6) to the AND circuit element (270) and to the T-flip block (265). On the other hand, each output Q1 from the T free lag flop (265)
is input to the R terminal of the R-8 flip-flop (269) via the signal inversion element (268). The output terminal Q2 of the R-S flip-flop (269) is a VT times signal when the R terminal is an H signal.

R端子がL信号の時は前の状態を保つため、第4図のよ
うな波形を示す。このよりなR−8フリツプ・フロップ
(269)からの出力信号は前記バアファ−(266)
からの出力信号と共にA N D回路に入力され、■工
として周期積分指令回路(1)より出てくる。■Iは積
分回路Iに入力さ扛、積分回路0尋の出力信号VSとパ
ルス幅設定電圧VτPを比較器αGで比較することでパ
ルス期間・ベース期間判定信号VPを出力する。このV
Dはアナログスイッチング素子(192)のゲートと信
号反転素子Oeに入力さする。信号反転素子住0の出力
信号VJとvHの反転信号とをAND回路累子Q4に入
力してANDしfc傷信号vBとしてアナログスイッチ
ング素子(191)のゲートに入力している。アナログ
スイッチング素子(193)にはvHが入力さnる。
When the R terminal is an L signal, the previous state is maintained, so the waveform shown in FIG. 4 is shown. The output signal from this flexible R-8 flip-flop (269) is connected to the buffer (266).
It is input to the A N D circuit together with the output signal from , and outputted from the periodic integration command circuit (1) as part (1). (2) I is input to the integrating circuit I, and a comparator αG compares the output signal VS of the integrating circuit 0 and the pulse width setting voltage VτP to output a pulse period/base period determination signal VP. This V
D is input to the gate of the analog switching element (192) and the signal inverting element Oe. The output signal VJ of the signal inverting element 0 and the inverted signal of vH are inputted to an AND circuit element Q4, ANDed, and inputted as an fc flaw signal vB to the gate of an analog switching element (191). vH is input to the analog switching element (193).

このように、アナログスイッチング素子(191)。Thus, an analog switching element (191).

(192)、  (193)のゲートにそ扛ぞ扛VB信
号、VD信号およびvH倍信号入力することによ見所定
期間以上短絡している場合vH他信号H信号とな凱アナ
ログスイッチング素子(195)がONとなって第2ベ
ース電流設定回路Q[有]からパワー素子駆動回路に第
2ペース電流IB2指金を行う。また。
By inputting the VB signal, VD signal and vH multiplied signal to the gates of (192) and (193), if the short-circuit occurs for more than a predetermined period, the vH and other signals will be output as the H signal. ) is turned on, and a second pace current IB2 is applied from the second base current setting circuit Q [present] to the power element drive circuit. Also.

VD信号によってパルス期間の指令をアナログスイッチ
ング素子(192)に送り、アナログスイッチング素子
(192)をONにしてパルス電流設定回路αaからパ
ルス電流IP指令をパワー素子駆動回路(至)に送る。
A pulse period command is sent to the analog switching element (192) by the VD signal, the analog switching element (192) is turned on, and a pulse current IP command is sent from the pulse current setting circuit αa to the power element drive circuit (to).

さらにvB倍信号よってベース期間中でかつ所定期間以
上短絡していないとき、アナログスイッチング素子(1
91)をONにして、第1ベース電流設定回路(L7)
から第1ペース電流IB1指令をパワー素子HA動回路
−に送る。
Furthermore, when the analog switching element (1
91) and turn on the first base current setting circuit (L7).
The first pace current IB1 command is sent to the power element HA operating circuit.

なお、第2ベース電流の大きさはワイヤ送給速度の増大
とともに大きくシ、シールドガスのco2ガス混合比が
大きくなるに従って大きくなるように切り換えスイッチ
(5)で切り換える。さらに使用するワイヤ径の大きい
程、より2を大きくするように切り換えスイッチ(ハ)
で切り換える。
The magnitude of the second base current increases as the wire feeding speed increases, and is changed by the changeover switch (5) so that it increases as the CO2 gas mixture ratio of the shielding gas increases. Furthermore, the larger the diameter of the wire used, the larger the changeover switch (c).
Switch with .

なお1上記実施例では短絡期間の検出を溶接電圧■とア
ーク維持電圧■cとの比較によって行ったが、第5図に
示すようにアーク光検出器(2)でアーク光を検出し、
この信号を基準値と比較する短絡判定回路(至)に入力
することで短絡もしくはアーク期間を検出するようにし
ても同様の効果を奏する。
Note 1: In the above embodiment, the short circuit period was detected by comparing the welding voltage (■) and the arc sustaining voltage (■c), but as shown in FIG. 5, the arc light was detected by an arc light detector (2),
The same effect can be obtained even if a short circuit or an arc period is detected by inputting this signal to a short circuit determination circuit (to) that compares this signal with a reference value.

〔発明の効果〕〔Effect of the invention〕

以上のように、この発明によnばワイヤと母材とが短絡
している期間、パルス電流より低く、第1ベース電流よ
り島い第2ベース電流を流し、短絡解除時に第2ベース
電流を切り、パルス電流もしくは第1ペース電流にもど
すようにしたので。
As described above, according to the present invention, during the period when the wire and the base metal are short-circuited, a second base current lower than the pulse current and lower than the first base current is passed, and when the short circuit is released, the second base current is passed. I turned it off and returned it to pulse current or first pace current.

短絡が生じてもアーク再生が早くなシ、アーク再生時の
電流が低いため、アーク時に発生する金属蒸気の圧力に
よって生じるスパッタが少なくなり例えば高速f6接も
可能となる効果がある。
Even if a short circuit occurs, arc regeneration is quick, and since the current during arc regeneration is low, spatter generated by the pressure of metal vapor generated during arcing is reduced, making high-speed f6 contact possible, for example.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はこの発明の一実施例によるアーク溶接装置を示
すブロック構成図、第2図はその動作を示す波形図、第
3図はこの発明の一実施例に係る周期積分指令回路を示
すブロック図、第4図はその動作を示す波形図、第5図
はこの発明の他の実施例によるアーク溶接装置の一部分
を示す構成図。 第6図は従来のアーク溶接装置を示すブロック構成図、
第1図はその動作を示す波形図、及び第8図は従来のア
ーク溶接装置における溶滴移行状態を示す説明図である
。 図において、(1)は溶接ワイヤ、(3)は被溶接物。 (5)はアーク、(7)は溶接電流供給部、(8)は電
圧検出器、 (11は目標電圧設定部、(lυはローパ
スフィルター、α3はパルス幅設定回路、α騰はパルス
周期設定回路、0荀は積分回路、α!9は比較器、αη
は第1ベース電流設定回路、Uはパルス電流設定回路、
−はパワー素子駆動回路、0擾はアーク維持電圧設定部
。 (ハ)は遅延時間設定部、(ハ)は第2ベース電流設定
回路、cAは周期積分指令回路、及び(至)は光検出器
である。 なお9図中同一行号は同−又は相当部分を示す。
FIG. 1 is a block configuration diagram showing an arc welding device according to an embodiment of the present invention, FIG. 2 is a waveform diagram showing its operation, and FIG. 3 is a block diagram showing a period integral command circuit according to an embodiment of the present invention. 4 is a waveform diagram showing its operation, and FIG. 5 is a configuration diagram showing a part of an arc welding apparatus according to another embodiment of the present invention. Figure 6 is a block diagram showing a conventional arc welding device;
FIG. 1 is a waveform diagram showing the operation, and FIG. 8 is an explanatory diagram showing the state of droplet transfer in a conventional arc welding device. In the figure, (1) is a welding wire, and (3) is an object to be welded. (5) is the arc, (7) is the welding current supply unit, (8) is the voltage detector, (11 is the target voltage setting unit, (lυ is the low-pass filter, α3 is the pulse width setting circuit, and α rise is the pulse period setting circuit, 0xun is the integration circuit, α!9 is the comparator, αη
is the first base current setting circuit, U is the pulse current setting circuit,
- is the power element drive circuit, 0 is the arc maintenance voltage setting section. (c) is a delay time setting section, (c) is a second base current setting circuit, cA is a period integration command circuit, and (to) is a photodetector. Note that the same line numbers in Figure 9 indicate the same or equivalent parts.

Claims (5)

【特許請求の範囲】[Claims] (1)被溶接物と溶接ワイヤとの間にパルス電流及び第
1ベース電流を有する溶接電流を流してアークを発生さ
せ溶接を行うものにおいて、上記溶接ワイヤが上記被溶
接物に短絡している期間、上記パルス電流より低く、上
記第1ベース電流より高い電流値の第2ベース電流を流
し、短絡解除時に上記第2ベース電流を切り、上記パル
ス電流もしくは上記第1ベース電流に戻すようにしたこ
とを特徴とするアーク溶接装置。
(1) In a device that performs welding by generating an arc by passing a welding current having a pulse current and a first base current between the workpiece and the welding wire, the welding wire is short-circuited to the workpiece. During the period, a second base current having a current value lower than the pulse current and higher than the first base current is passed, and when the short circuit is released, the second base current is cut off and returned to the pulse current or the first base current. An arc welding device characterized by:
(2)第2ベース電流は、溶接ワイヤが被溶接物に短絡
した時点から所定時間後に通電し始めるようにしたこと
を特徴とする特許請求の範囲第1項記載のアーク溶接装
置。
(2) The arc welding apparatus according to claim 1, wherein the second base current starts flowing after a predetermined time from the time when the welding wire is short-circuited to the workpiece.
(3)溶接ワイヤと被溶接物間の電圧を検出し、この検
出電圧がアーク維持電圧値以下の期間を短絡期間とした
特許請求の範囲第1項又は第2項記のアーク溶接装置。
(3) The arc welding apparatus according to claim 1 or 2, wherein the voltage between the welding wire and the workpiece is detected, and the period in which the detected voltage is equal to or lower than the arc maintenance voltage value is defined as a short circuit period.
(4)溶接ワイヤと被溶接物間に生じるアーク光を検出
する光検出器を設け、上記光検出器が上記アーク光を検
出していない期間を短絡期間とした特許請求の範囲第1
項又は第2項記載のアーク溶接装置。
(4) A photodetector is provided to detect arc light generated between the welding wire and the workpiece, and the period in which the photodetector does not detect the arc light is defined as a short circuit period.
The arc welding device according to item 1 or 2.
(5)第2ベース電流値はシールドガス、ワイヤ径、ワ
イヤ送給速度及び平均溶接電圧によつて変えたことを特
徴とする特許請求の範囲第1項ないし第4項記載のアー
ク溶接装置。
(5) The arc welding apparatus according to any one of claims 1 to 4, wherein the second base current value is changed depending on shielding gas, wire diameter, wire feeding speed, and average welding voltage.
JP60107293A 1985-05-20 1985-05-20 Arc welding equipment Expired - Lifetime JPH0613147B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60107293A JPH0613147B2 (en) 1985-05-20 1985-05-20 Arc welding equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60107293A JPH0613147B2 (en) 1985-05-20 1985-05-20 Arc welding equipment

Publications (2)

Publication Number Publication Date
JPS61266180A true JPS61266180A (en) 1986-11-25
JPH0613147B2 JPH0613147B2 (en) 1994-02-23

Family

ID=14455428

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60107293A Expired - Lifetime JPH0613147B2 (en) 1985-05-20 1985-05-20 Arc welding equipment

Country Status (1)

Country Link
JP (1) JPH0613147B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990009856A1 (en) * 1989-02-28 1990-09-07 Mitsubishi Denki Kabushiki Kaisha Pulse welding apparatus
WO1990009858A1 (en) * 1989-02-27 1990-09-07 Mitsubishi Denki Kabushiki Kaisha Pulse welding apparatus
WO1990009857A1 (en) * 1989-02-28 1990-09-07 Mitsubishi Denki Kabushiki Kaisha Pulse welding apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5719166A (en) * 1980-07-08 1982-02-01 Mitsubishi Electric Corp Pulse arc welding device
JPS5719165A (en) * 1980-07-08 1982-02-01 Mitsubishi Electric Corp Pulse arc welding device
JPS5868474A (en) * 1981-10-20 1983-04-23 Daihen Corp Power source for pulse arc welding

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5719166A (en) * 1980-07-08 1982-02-01 Mitsubishi Electric Corp Pulse arc welding device
JPS5719165A (en) * 1980-07-08 1982-02-01 Mitsubishi Electric Corp Pulse arc welding device
JPS5868474A (en) * 1981-10-20 1983-04-23 Daihen Corp Power source for pulse arc welding

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990009858A1 (en) * 1989-02-27 1990-09-07 Mitsubishi Denki Kabushiki Kaisha Pulse welding apparatus
GB2240888A (en) * 1989-02-27 1991-08-14 Mitsubishi Electric Corp Pulse welding apparatus
WO1990009856A1 (en) * 1989-02-28 1990-09-07 Mitsubishi Denki Kabushiki Kaisha Pulse welding apparatus
WO1990009857A1 (en) * 1989-02-28 1990-09-07 Mitsubishi Denki Kabushiki Kaisha Pulse welding apparatus
GB2250357A (en) * 1989-02-28 1992-06-03 Mitsubishi Electric Corp Pulse welding apparatus
US5406052A (en) * 1989-02-28 1995-04-11 Mitsubishi Denki Kabushiki Kaisha Pulsed arc welding equipment

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