JPS60231573A - Arc starting device of welding machine - Google Patents

Arc starting device of welding machine

Info

Publication number
JPS60231573A
JPS60231573A JP8781584A JP8781584A JPS60231573A JP S60231573 A JPS60231573 A JP S60231573A JP 8781584 A JP8781584 A JP 8781584A JP 8781584 A JP8781584 A JP 8781584A JP S60231573 A JPS60231573 A JP S60231573A
Authority
JP
Japan
Prior art keywords
welding
wire
speed command
speed
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.)
Pending
Application number
JP8781584A
Other languages
Japanese (ja)
Inventor
Osamu Nagano
修 長野
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
Original Assignee
Mitsubishi Electric 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 filed Critical Mitsubishi Electric Corp
Priority to JP8781584A priority Critical patent/JPS60231573A/en
Publication of JPS60231573A publication Critical patent/JPS60231573A/en
Pending legal-status Critical Current

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
    • B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
    • 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

Abstract

PURPOSE:To make an arc transfer of the weld starting time easy and to weld in a stabilized arc length by controlling in steps the feed speed of a wire feeding motor of the weld starting time. CONSTITUTION:A slowdown speed command value 2 is outputted from a speed command changing means 4 with a weld starting signal at weld starting time and a wire is fed at low speed. Simultaneously a voltage detecting means 8 also starts the detection of a starting voltage. When a wire is brought into contact with the electrifying of a starting current and changing signal is outputted to the speed command changing means 4 to stop the feeding or a wire by making the output zero. This time a welding voltage is dropped for a time but increased gradually according to the arc length generated by heat generation becoming longer. The reaching of the voltage to the prescribed voltage is detected by the voltage detecting means 8 and a changing signal is transmitted to the speed command changing means 4. The means 4 changes a wire feeding speed from zero to a speed command value 3 of under welding and feeds a wire by driving a motor 8. Simultaneously a welding current is shifted to a pulse current and welding is progressed.

Description

【発明の詳細な説明】 〔発明の技術分骨〕 この発明は不活性ガス中で消耗電極を用いるガスシール
ドパルスＭＩＧ溶接、特にアルミニウム溶接に用いる溶
接機のアークスタート装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Substances of the Invention] The present invention relates to an arc starting device for a welding machine used for gas shield pulsed MIG welding using a consumable electrode in an inert gas, particularly for aluminum welding.

〔従来技術〕[Prior art]

第５図は従来の溶接機のアークスタート装置を示すブロ
ック図である。図において（１）は溶接時にワイヤ送給
モータ（８）のワイヤ送給速度を指令するワイヤ送給速
度指令手段で、６ｈ、溶接スタート時のスローダウン速
度指令値（２）と、溶接中の速度指令値（３）が設定さ
れている。（４）はワイヤ送給速度指令手段（１）から
出力されるスローダウン速度指令値（２）と溶接中の速
度指令値（６）を切換える速度指令切換手段、（５）は
溶接電流を検出し、速度指令切換手段（４）に対して切
換信号ｌ出力する電流検出手段、（６）は速度指令切換
手段（４）からの速度指令信号？入力してワイヤ送給モ
ータ（８）ヲ駆動するモータ駆動手段である。FIG. 5 is a block diagram showing an arc starting device for a conventional welding machine. In the figure, (1) is a wire feed speed command means for commanding the wire feed speed of the wire feed motor (8) during welding. A speed command value (3) is set. (4) is a speed command switching means for switching between the slowdown speed command value (2) outputted from the wire feed speed command means (1) and the speed command value (6) during welding, and (5) is for detecting the welding current. The current detection means outputs a switching signal l to the speed command switching means (4), and (6) is the speed command signal from the speed command switching means (4). This is a motor driving means that receives input and drives the wire feeding motor (8).

上記のよ５に構成された従来の溶接機のアークスタート
装置においては、第６図のタイムチャ−トに示したよう
に、溶接開始信号（Ｓｌに工す速度指令切換手段（４）
はワイヤ送給モータ（８）の速度指令をスローダウン速
度指令値（２）としてモータ駆動手段（６）に出力し、
このスローダウン速度指令値（２）によりワイヤ送給モ
ータ（８）はワイヤを低速度で送給スる。送給されてい
るワイヤが母材に接触して短絡すると、不図示のスター
ト電流設定器″′ｔ−あらかじめ設定した溶接スタート
電流（Ｉｏ）が流れる。電流検出手段（５）では上記溶
接スタート電流（Ｉｏｌの通電を検出し、切換信号？速
度指令切換手段（４１に出力する。速度指令切換手段（
４）では、上記切換信号により速度指令値ン溶接中の速
度指令（ｉｑ１３１に切換え、ワイヤの送給速度を溶接
進行中の定常速度とし、溶接スタート電流（Ｉｏ）’に
通電しなめ；ら母材とワイヤ間にアークを発生させ、そ
の後溶接電流をパルス電流に移行して溶接を行な５．。In the conventional arc start device of a welding machine configured as shown in 5 above, as shown in the time chart of FIG.
outputs the speed command of the wire feed motor (8) to the motor drive means (6) as a slowdown speed command value (2),
This slowdown speed command value (2) causes the wire feeding motor (8) to feed the wire at a low speed. When the wire being fed contacts the base metal and short-circuits, a preset welding start current (Io) flows through a start current setting device (not shown).The current detecting means (5) detects the welding start current. (Detects the energization of Iol and outputs a switching signal to the speed command switching means (41.
In 4), the speed command value is changed to the speed command during welding (iq131) by the above switching signal, the wire feeding speed is set to the steady speed during welding, and the welding start current (Io)' is not energized; 5. Generate an arc between the material and the wire, then shift the welding current to a pulsed current to perform welding.5.

しかしながらアルミニウム溶接においてはワイヤと母材
の接触後、急激にワイヤを送給するとアルミニウムの比
抵抗が少ないため、スタート電流（Ｉ。）による発熱が
すくなく、アークに移行することが困難であるという問
題点があった。However, in aluminum welding, if the wire is rapidly fed after contact between the wire and the base metal, the specific resistance of aluminum is low, so there is little heat generation due to the starting current (I.), and it is difficult to transfer to an arc. There was a point.

〔発明の概要〕[Summary of the invention]

この発明はかかる問題点ケ改烏する目的て゛なさねたも
のであり、ワイヤ送給速度ケ溶接スタート電流検出時と
溶接スタート電流通電後溶接電圧があらかじめ設定した
所定値に達したことを検出した時とで段階的に制量する
ことにより了−りの移行を確実に行なう溶接機のアーク
スタート装置を提案するものである。The present invention has been made with the aim of solving such problems, and detects when the wire feeding speed detects the welding start current and when the welding voltage reaches a preset value after the welding start current is energized. The present invention proposes an arc start device for a welding machine that ensures a reliable transition by controlling the amount in stages over time.

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

第１図はこの発明の一実施例を示すブロック図であり、
図において（１）〜（７）は上記従来装置と同一のもの
である６（８）は電流検出手段（５）で溶接スタート電
流ビ検出した後溶接電圧が、あらかじめ設定した所定値
に達したことを検出し７、速度指令切換手段（４）に切
換信号を出力する宵王検出手段である。FIG. 1 is a block diagram showing one embodiment of the present invention,
In the figure, (1) to (7) are the same as the conventional device above. 6 (8) is when the welding voltage reaches a preset value after the welding start current is detected by the current detection means (5). The yoiou detection means detects this and outputs a switching signal to the speed command switching means (4).

上記の１５に構成した溶接機のアークスタート装置にお
いて、溶接開始時には第２図のタイムチャートに示すよ
５に溶接開始信号（８１により速度指令切換手段（４１
からスローダウン速度指令値（２１が出力さね１、ワイ
ヤが低速度で送給される。同時に電圧検出手段（８）も
溶接スター）宣Ｂ：（Ｖ♂の検出ケ開始する。In the arc start device of the welding machine configured as 15 above, when welding is started, a welding start signal (81) is sent to the speed command switching means (41) as shown in the time chart of Fig. 2.
From the slowdown speed command value (21 is the output level 1, the wire is fed at low speed. At the same time, the voltage detection means (8) also starts welding) Declaration B: (Detection of V♂ starts.

次に、送給されるワイヤが母材に接触し、短絡したこと
？溶接スタート電流（ＩＯ）の通電にエリ電流検出手段
（５１で検出し、電流検出手段（５）から切換信号を速
度指令切換手段（４）に出力する。速度：ｌｉ７．全切
換手段（４）では上記切換信号により出力を零としてワ
イヤの送給？停止する。このとき−溶接雷、田（Ｖｏ）
はワイヤとみ材の接触により一時低下するｈ−ワイヤと
母材間の発熱により発生したアーク長が長くなるにした
がって次第に高くなる。この溶接重圧があらかじめ設定
した所定の電ＥＥＥ　（Ｖｓ）に達したことを電圧検出
手段（８）で検出し、この時点で速度指令切換手段（４
）に切換信号を出力する。速度指令切換手段（４）はこ
の切＃信丹ζζ工りワイヤ送給速度を零から溶接中の速
度指令値（６）に切換え、ワイヤ送給モータ（８１’ｒ
駆動してワイヤ？送給する。同時に溶接電流をパルス電
流に移行して溶接を進行させる。Next, the wire being fed came into contact with the base material and caused a short circuit? The welding start current (IO) is detected by the current detection means (51), and a switching signal is output from the current detection means (5) to the speed command switching means (4). Speed: li7. All switching means (4) Then, the output is made zero by the above switching signal and the wire feeding is stopped.At this time - welding lightning, field (Vo)
h-temporarily decreases due to contact between the wire and the base material, and gradually increases as the arc length generated by heat generation between the wire and the base metal increases. The voltage detection means (8) detects that this welding pressure has reached a preset predetermined voltage EEE (Vs), and at this point, the speed command switching means (4)
) outputs a switching signal. The speed command switching means (4) switches the welding wire feed speed from zero to the speed command value (6) during welding, and switches the wire feed motor (81'r
Drive and wire? send. At the same time, the welding current is changed to a pulsed current to advance welding.

上記実施例に示した溶接機のアークスタート装置におい
てはワイヤが母材に接触し、短絡した瞬間に一時的にワ
イヤ送給モータ（７）ヲ停市することにより、ワイヤの
送給を停止するから、比抵抗の小さいアルミニューム溶
接においても、溶接スタート電流（Ｉ♂により充分な発
熱ケ得ることができ、アークの移行が容易である。In the arc start device of the welding machine shown in the above embodiment, the moment the wire comes into contact with the base metal and a short circuit occurs, the wire feed motor (7) is temporarily stopped to stop feeding the wire. Therefore, even when welding aluminum, which has a low specific resistance, sufficient heat generation can be obtained by the welding start current (I♂), and arc transfer is easy.

さらに、溶接電圧を検出することに工す溶接に移行する
ため、安定した了−り長で溶接ケ行な５ことができる。Furthermore, since the welding is performed by detecting the welding voltage, welding can be performed with a stable welding length.

なお上記実施例ではワイヤが母材に接触・短絡した瞬間
に、一時的にワイヤの送給ケ停止したが。In the above embodiment, the feeding of the wire was temporarily stopped at the moment the wire came into contact with the base material and was short-circuited.

第５図に示すようにワイヤ送給速度指令手段（１）にス
ローダウン速度指令値（２１，溶接中の速度指令値（３
）以外にスローアップ速度指令値（９１′ｌｆも設定し
、第４図のタイムチャートに示すよ５に、ワイヤが母材
に接触・短絡したときから、溶接重圧が所定の′ＦｒＬ
田（Ｖｓ）に達するまで、ワイヤの送給速度をスローア
ップ速度指令値（９）で除々に上昇させても、上記実施
例と同様の効果ケ奏する。As shown in FIG.
), a slow-up speed command value (91'lf) is also set, and as shown in the time chart of Fig. 4, from the time when the wire contacts and shorts the base metal, the welding pressure reaches the predetermined 'FrL.
Even if the wire feeding speed is gradually increased by the slow-up speed command value (9) until the wire feeding speed reaches Vs, the same effect as in the above embodiment can be obtained.

〔発明の効果〕〔Effect of the invention〕

この発明は以上説明したとおり、ワイヤ送給速度な溶接
スタート電流検出時と、溶接スタート電流通電後溶接軍
、王があらかじめ設定した所定に達した時とで段階的に
制御することにより、ワイヤと母材の接触・短絡後の急
激なワイヤ送給の防止ケ図ったことから溶接開始時のア
ーク移行が容易となると共に、安定したアーク長で溶接
することができる。さらに溶接開始時の溶接不良も防止
できるといへ効果も有する◎As explained above, this invention performs step-by-step control at the time of detecting the welding start current, which is the wire feed speed, and when the welding force reaches a preset value after the welding start current is energized. Since it is designed to prevent sudden wire feeding after contact and short circuit of the base metal, arc transition at the start of welding is facilitated, and welding can be performed with a stable arc length. It also has the effect of preventing welding defects at the start of welding◎

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

第１図はこの発明の実施例を示すブロック図、第２図は
第１図に示した実施例のタイムチャート、第３図はこの
発明の他の実施例を示すブロック図、第４図は第６図に
示した実施例のタイムチャート。 第５図は従来の溶接機のアークスタート装置を示したブ
ロック図、第６図は第５図に示した従来の溶接機の了−
クスタート装置のタイムチャートである。 （１１・・・ワイヤ送給速度指令手段＋　＋２・・・溶
接中の速度指令値、（６）・・・スローダウン速度指令
値、（４）・・・速度指令切換手段、（５）・・・電流
検出手段、（６）・・・モータ駆動手段、（７）・・・
ワイヤ送給モータ、（８）・・・電圧検出手段、（９）
・・・スローアップ速度指令値、なお、各図中同一符号
は同−又は相当部分ケ示す。 代理人　弁理士　木　村　三　朗 １　図 第　３　因 第　２１Ｉ！Ｊ 苅創FIG. 1 is a block diagram showing an embodiment of the invention, FIG. 2 is a time chart of the embodiment shown in FIG. 1, FIG. 3 is a block diagram showing another embodiment of the invention, and FIG. 4 is a block diagram showing an embodiment of the invention. 7 is a time chart of the embodiment shown in FIG. 6. Fig. 5 is a block diagram showing the arc start device of a conventional welding machine, and Fig. 6 is a block diagram showing the arc start device of the conventional welding machine shown in Fig. 5.
3 is a time chart of the start device. (11... Wire feeding speed command means + +2... Speed command value during welding, (6)... Slowdown speed command value, (4)... Speed command switching means, (5) ... Current detection means, (6) ... Motor drive means, (7) ...
Wire feeding motor, (8)...voltage detection means, (9)
. . . Slow-up speed command value. In each figure, the same reference numerals indicate the same or corresponding parts. Agent Patent Attorney Sanro Kimura 1 Figure 3 Reason 21I! J Kari Sou

Claims (1)

【特許請求の範囲】 消耗性電極ケワイヤ送給モータにより連続送給して溶接
するパルスＭＩＧ溶接に用いる溶接電源において、上記
ワイヤ送給モータの送給速度を指令するワイヤ送給速度
指令手段と；該ワイヤ送給速度指令手段から出力する速
度指令値を切換える速度指令切換手段と；溶接スタート
電流ケ検出し。 上記速度指令切換手段に切換信号を出力する電流検出手
段と；該電流検出手段で溶接スタート電流を検出した後
、溶接電圧があらかじめ設定した所定値に達したことを
検出し、上記速度指令切換手段に切換信号を出力する電
圧検出手段とを備え、溶接スタート時の上記ワイヤ送給
モータの送給速度を段階的に制御することン特徴とする
溶接機のアークスタート装置。[Scope of Claims] In a welding power source used for pulsed MIG welding in which a consumable electrode wire is continuously fed and welded by a wire feeding motor, a wire feeding speed command means for commanding the feeding speed of the wire feeding motor; a speed command switching means for switching a speed command value output from the wire feeding speed command means; detecting a welding start current; current detection means for outputting a switching signal to the speed command switching means; after detecting a welding start current with the current detection means, detecting that the welding voltage has reached a predetermined value; an arc start device for a welding machine, comprising voltage detection means for outputting a switching signal to the wire feed motor, and controlling the feed speed of the wire feed motor in stages at the time of starting welding.
JP8781584A 1984-05-02 1984-05-02 Arc starting device of welding machine Pending JPS60231573A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8781584A JPS60231573A (en) 1984-05-02 1984-05-02 Arc starting device of welding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8781584A JPS60231573A (en) 1984-05-02 1984-05-02 Arc starting device of welding machine

Publications (1)

Publication Number Publication Date
JPS60231573A true JPS60231573A (en) 1985-11-18

Family

ID=13925464

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8781584A Pending JPS60231573A (en) 1984-05-02 1984-05-02 Arc starting device of welding machine

Country Status (1)

Country Link
JP (1) JPS60231573A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02274378A (en) * 1989-04-17 1990-11-08 Matsushita Electric Ind Co Ltd Consumable electrode welding power source
JP2006247749A (en) * 2006-05-16 2006-09-21 Matsushita Electric Ind Co Ltd Consumable electrode welding method
JP2009101370A (en) * 2007-10-22 2009-05-14 Panasonic Corp Arc welding control method and arc welding apparatus
EP2248621A1 (en) * 2009-05-07 2010-11-10 L'AIR LIQUIDE, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Process of starting an arc welding operation with delay step for entering in the pulse modus
EP2269758A1 (en) 2009-07-03 2011-01-05 EWM Hightec Welding GmbH DC Arc welding method and welding device
RU2469826C1 (en) * 2011-06-20 2012-12-20 Сергей Михайлович Анпилов Method of exciting electric arc and device to this end
JP2015096268A (en) * 2013-11-15 2015-05-21 株式会社ダイヘン Arc welding method

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02274378A (en) * 1989-04-17 1990-11-08 Matsushita Electric Ind Co Ltd Consumable electrode welding power source
JP2006247749A (en) * 2006-05-16 2006-09-21 Matsushita Electric Ind Co Ltd Consumable electrode welding method
JP4548387B2 (en) * 2006-05-16 2010-09-22 パナソニック株式会社 Consumable electrode welding method
JP2009101370A (en) * 2007-10-22 2009-05-14 Panasonic Corp Arc welding control method and arc welding apparatus
EP2248621A1 (en) * 2009-05-07 2010-11-10 L'AIR LIQUIDE, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Process of starting an arc welding operation with delay step for entering in the pulse modus
FR2945226A1 (en) * 2009-05-07 2010-11-12 Air Liquide PRIMING METHOD FOR ARC WELDING
EP2269758A1 (en) 2009-07-03 2011-01-05 EWM Hightec Welding GmbH DC Arc welding method and welding device
RU2469826C1 (en) * 2011-06-20 2012-12-20 Сергей Михайлович Анпилов Method of exciting electric arc and device to this end
WO2012177177A2 (en) * 2011-06-20 2012-12-27 Anpilov Sergej Mikhajlovich Method for initiating an electric arc and device for the implementation thereof
WO2012177177A3 (en) * 2011-06-20 2013-03-21 Anpilov Sergej Mikhajlovich Method for initiating an electric arc and device for the implementation thereof
JP2015096268A (en) * 2013-11-15 2015-05-21 株式会社ダイヘン Arc welding method

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