JPH0352769A - Method and equipment for ac arc welding for consumable electrode gas shielded arc welding - Google Patents
Method and equipment for ac arc welding for consumable electrode gas shielded arc weldingInfo
- Publication number
- JPH0352769A JPH0352769A JP18737789A JP18737789A JPH0352769A JP H0352769 A JPH0352769 A JP H0352769A JP 18737789 A JP18737789 A JP 18737789A JP 18737789 A JP18737789 A JP 18737789A JP H0352769 A JPH0352769 A JP H0352769A
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- JP
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- Prior art keywords
- period
- output
- arc welding
- electrode
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003466 welding Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims description 11
- 239000000463 material Substances 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims 2
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 9
- 239000010953 base metal Substances 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 238000003079 width control Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- Arc Welding Control (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は交流アーク溶接に係シ、特に消耗電極式ガスシ
ールドアーク溶接に好適な溶接方法トよびその装置K関
『る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to alternating current arc welding, and particularly to a welding method and apparatus K suitable for consumable electrode type gas-shielded arc welding.
たとえば、特開昭56−165564号公報に開示され
ている技術にかいては、極性として電極(以下、ワイヤ
と呼ぶ)をプラス、母材をマイナ電流期間を変えること
によって平均溶接電流値を変える。この結果、ワイヤの
先端に形威される溶滴をピーク電流期間に同期して溶融
池へ移動させることかでき、スパツタの少ない溶接をす
ることができた。For example, in the technique disclosed in Japanese Patent Application Laid-Open No. 56-165564, the average welding current value is changed by adding an electrode (hereinafter referred to as a wire) as the polarity and changing the minor current period of the base material. . As a result, the droplets forming at the tip of the wire could be moved to the molten pool in synchronization with the peak current period, making it possible to weld with less spatter.
また、上記した従来技術にかいて、平均溶接電流値が小
さいときのアークの安定性をさらに改善するため、特開
昭59−150672号公報では、第1のパルス電流に
よって溶滴をワイヤ先端から離脱させるとともに、第2
のパルス電流によって第1のパルス電流によって生じる
給電チップへのワイヤの焼付きを防止することによう、
溶接部の品質を低下させるアーク切れを生じないように
していた。Furthermore, in order to further improve the stability of the arc when the average welding current value is small, Japanese Patent Application Laid-Open No. 59-150672 discloses that a first pulse current is used to move droplets from the tip of the wire. At the same time, the second
The pulsed current prevents the wire from seizing on the power supply tip caused by the first pulsed current.
This prevents the occurrence of arc breaks that degrade the quality of welded parts.
ワイヤをプラス、母材をマイナスとするいわゆる逆極性
で溶接する場合、溶接電流値を大きくすると、陰極点は
ワイヤ先端のほぼ真下の母材表面上に形成され、アーク
はほぼ真直となる。一力、溶接電流値を小さくすると、
陰極点は母材表面上を広範囲に移動するため、アークも
母材表面上をふらつく。そして、アーク長が過度にのび
ると、アークは消弧し切れてしまう。When welding with so-called reverse polarity, where the wire is positive and the base metal is negative, when the welding current value is increased, a cathode spot is formed on the surface of the base material almost directly below the tip of the wire, and the arc becomes almost straight. If you reduce the welding current value,
Since the cathode spot moves over a wide range on the base metal surface, the arc also wanders on the base metal surface. If the arc length increases excessively, the arc will be completely extinguished.
このため、上記した従来技術における前者では平均溶接
電流値を余b小さ〈することができず、後者にかいても
、小電流範囲に釦ける有害なアーク切れを十分に防止す
ることができなかった。For this reason, in the former technique described above, the average welding current value cannot be reduced by a small amount, and even in the latter technique, it is not possible to sufficiently prevent harmful arc breakage that occurs when the button is pressed in the small current range. Ta.
本発明の目的は、小電流範囲におけるアークのふらつき
や有害なアーク切れを防止し、溶接作業?および溶接部
の品質を向上させることができる消耗電極式ガスシール
ドアーク溶接における交流アーク溶接方法およびその装
置を提供するにある。The purpose of the present invention is to prevent arc fluctuation and harmful arc breakage in the small current range, and to prevent welding operations. Another object of the present invention is to provide an AC arc welding method and apparatus for consumable electrode type gas-shielded arc welding that can improve the quality of welded parts.
上記した課題は、本発明の消耗電極式ガスシールドアー
ク溶接方法の出力特性例である第1図に示すように、ワ
イヤと母材との間に交流の出力を印加し、ワイヤをプラ
スにする期間TIFと、この期間TmpK>ける出力レ
ベルとしてのワイヤの臨界電流値ようも大きい電流値I
MFと、ワイヤをマイナス■する期間TmyK&ける出
力レベルとしての臨界電流値ようも小さい電流値Ir+
nの3条件を一定にしてかき、フイヤ送給量の増/減に
応じて期間TINを短/長とすることにより解決される
。The above problem can be solved by applying AC output between the wire and the base material to make the wire positive, as shown in Figure 1, which is an example of the output characteristics of the consumable electrode type gas shielded arc welding method of the present invention. The period TIF and the critical current value of the wire as the output level during this period TmpK> A large current value I
MF and the critical current value as the output level during which the wire is negative (TmyK&).The current value Ir+ is also small.
This can be solved by keeping the three conditions n constant and making the period TIN shorter/longer depending on the increase/decrease in the amount of fire feed.
電流値I111Fが大きい期間Tl!IPに贅いては、
陰極点がワイヤ先端のほぼ真下の母材上に形成される結
果、アークはほぼ真直となる。また、期間’l’.NK
>いては、電流値INNは小さいが、陰極点がワイヤ先
端に形或される結果、同様に、アークはほぼ真直となる
から、アークのふらつきや、有害なアーク切れは発生し
ない。Period Tl during which current value I111F is large! Spending too much time on IP
As a result of the cathode spot being formed on the base material approximately directly below the wire tip, the arc is approximately straight. Also, the period 'l'. N.K.
>, the current value INN is small, but as a result of the cathode point being formed at the tip of the wire, the arc is also almost straight, so arc wandering and harmful arc breakage do not occur.
また、期間TINを変えることによう平均溶接電流値も
変わb,ワイヤの先端に形威される溶滴は期間T1II
1?に同期して溶融池へ移動する。In addition, by changing the period TIN, the average welding current value also changes, and the droplet formed at the tip of the wire changes during the period T1II.
1? move to the molten pool in synchronization with
第2図は、第1図の出力特性を実現するための溶接装置
の第1の実施例図である。FIG. 2 is a diagram of a first embodiment of a welding device for realizing the output characteristics shown in FIG. 1.
同図に3いて、1は商用周波数の交流を直流に整流する
入力側整流器。2はMOS−FETで構交流のパルス幅
を制御するパルス幅制御回路。4は溶接トランスで、入
力側は上記入力側インバータに接続されている。5は溶
接トランス4の出力側に接続された出力側整流器で、上
記高周波交流を再び直流に変換する。6は出力側整流器
5で整流された直流出力を平滑にするための直流リアク
タ。7は電流検出器。8は交流溶接を行うため、7
直流を再び交流に変換するための出力側インパータ。な
訃、出力側インバータ8は、期間T]IIP設定器9と
、期間Tma設定器10で設定される矩形波発生器11
からの信号に基づき、駆動回路12によう制御される。In the figure, numeral 3 indicates an input rectifier that rectifies commercial frequency alternating current into direct current. 2 is a pulse width control circuit that controls the pulse width of the component current using a MOS-FET. 4 is a welding transformer, the input side of which is connected to the input side inverter. Reference numeral 5 denotes an output rectifier connected to the output side of the welding transformer 4, which converts the high frequency alternating current into direct current again. 6 is a DC reactor for smoothing the DC output rectified by the output rectifier 5; 7 is a current detector. 8 is for performing AC welding, and 7 is an output-side imperter for converting DC back into AC. The output side inverter 8 is a rectangular wave generator 11 set by a period T/IIP setter 9 and a period Tma setter 10.
Based on the signals from the drive circuit 12, the drive circuit 12 is controlled as follows.
13、14は電流設定器で、出力側インパータ8が出力
する電流値Impj?よび電流値IBMを設定するため
のものである。15は切換スイッチで、矩形波発生器1
1からの信号によシ、電流設定器13と期間TRm’設
定器9が、tfc電流設定器14と期間TIN設定器1
0がそれぞれ同期するようにして、電流設定器13、1
4を誤差増幅器16を介してパルス幅制御回路3に接続
する。13 and 14 are current setting devices, which set the current value Impj? output from the output side inverter 8. and current value IBM. 15 is a changeover switch, and the square wave generator 1
1, the current setter 13 and the period TRm' setter 9 are connected to the TFC current setter 14 and the period TIN setter 1.
0 are synchronized with each other, the current setters 13 and 1
4 is connected to the pulse width control circuit 3 via the error amplifier 16.
なお、誤差増幅器16には電流検出器7が接続されてお
b、溶接時、誤差増幅器16は電流検出器7によυ検出
した電流値と、電流設定器13、14によυ設定された
電流値ImpxImyとを比較し、電流検出器7を流れ
る電流値の平均値が電流値ImpzIr+nに対応する
電流値になるよ誤差増幅器16は、出力側インバータ8
の出力特性が定電流特性となるようにパルス幅制御回路
3を制御する。A current detector 7 is connected to the error amplifier 16, and during welding, the error amplifier 16 uses the current value υ detected by the current detector 7 and the current value υ set by the current setting devices 13 and 14. The error amplifier 16 compares the current value ImpxImy with the output side inverter 8 so that the average value of the current values flowing through the current detector 7 becomes the current value corresponding to the current value ImpzIr+n.
The pulse width control circuit 3 is controlled so that the output characteristics of the pulse width control circuit 3 have constant current characteristics.
17は出力側インバータ8の出力側の端子に接続された
電圧検出回路。18は溶接をするときの電圧値を設定す
るための電圧設定器で、比較器19を介して期間TIN
設定器10に接続されている。そして、電圧設定器18
により電圧値Vを設定すると、設定された電圧値Vに対
応する期間TIIIが期関TIM設定器10に設定され
る。なk,期間Tinは、第3図に示すように、電圧値
Vに対して4指数関数的に変化するようになっている。17 is a voltage detection circuit connected to the output side terminal of the output side inverter 8; 18 is a voltage setting device for setting the voltage value when welding, and the period TIN is
It is connected to the setting device 10. And voltage setting device 18
When the voltage value V is set by , the period TIII corresponding to the set voltage value V is set in the period TIM setter 10 . As shown in FIG. 3, the period Tin changes with respect to the voltage value V in a four-exponential manner.
19は比較器で、溶接時、電圧検出回路17で検出した
検出値と、設定された電圧値Vとを比較し、両者が一致
するように期間TIN設定器10を制御する。A comparator 19 compares the detection value detected by the voltage detection circuit 17 and the set voltage value V during welding, and controls the period TIN setting device 10 so that the two match.
20はワイヤ。21はワイヤ20を送給するローラ。2
2はモータで、モータ制御回路23により制御される。20 is a wire. 21 is a roller that feeds the wire 20; 2
2 is a motor, which is controlled by a motor control circuit 23.
24はモータ制御回路23に接続されたワイヤ送給量設
定器。25は母材である。24 is a wire feed rate setting device connected to the motor control circuit 23; 25 is a base material.
なシ、m4図ないし第5図は上記した電圧検出回路17
の一例を示すもので、第4@はコンデンサのピーク充電
波形によシ期間Tip%1Iにおけるワイヤ20と母材
25間の電圧VIIIP%VIllを個別に検出する例
を示す。また、第5図は電圧Vmp%v]llMの平均
値を検出する例を示すものである。Figures m4 to 5 show the voltage detection circuit 17 described above.
This shows an example, and the fourth example shows an example in which the voltage VIIIP%VIll between the wire 20 and the base material 25 during the period Tip%1I is individually detected based on the peak charging waveform of the capacitor. Further, FIG. 5 shows an example of detecting the average value of the voltage Vmp%v]llM.
以下、動作について説明する.
溶接に先立ち、電流設定器13,14および期間T鳳P
設定器9により%電流値ImpqImxおよび期間Ti
Pを定める。また、電圧設定器18によJIJ[圧値V
(上記したように、同時に期間TInNも決まる)を、
ワイヤ送給量設定器24によりワイヤ20の送シ量を設
定する。The operation will be explained below. Prior to welding, the current setting devices 13 and 14 and the period T
The setter 9 sets the % current value ImpqImx and the period Ti.
Determine P. In addition, the voltage setting device 18 sets JIJ [pressure value V
(As mentioned above, the period TInN is also determined at the same time),
The feed amount of the wire 20 is set by the wire feed amount setting device 24.
溶接時、期間TIFに同期してワイヤ20の先端に形成
される溶滴が溶融池へ移行し、期間TlwK&いてアー
クの維持かよび若干の溶滴形或が行なわれる。そして、
いづれの期間にシいても、アークはほぼ真直となる。During welding, a droplet formed at the tip of the wire 20 is transferred to the molten pool in synchronization with the period TIF, and during the period TlwK&, the arc is maintained and the droplet is slightly shaped. and,
No matter which period it falls in, the arc will be almost straight.
また、たとえばアーク長がのびたとき、すなわち、電圧
検出回路17が検出した出力側インバータ8の出力端子
電圧値が電圧設定器18に設定された電圧値よbも大き
くなると、比較器19は期が短くなったときには、逆に
期間TINを短くするから、アーク長は一定に保たれる
。Further, for example, when the arc length increases, that is, when the output terminal voltage value of the output side inverter 8 detected by the voltage detection circuit 17 becomes larger than the voltage value set in the voltage setting device 18, the comparator 19 is activated. When the arc length becomes shorter, the period TIN is shortened, so that the arc length is kept constant.
第1表はL. 211EIIIφのメタルフラツクスコ
アドワイヤを用いて、シールドガスとしてArガス80
φ+COzガス20’%の交流溶接を行った場合の一例
である。Table 1 shows L. Using 211EIIIφ metal flux cored wire, Ar gas 80% was used as shielding gas.
This is an example of AC welding with φ+COz gas of 20'%.
第1表
電流Ir+psImM$Pよび期間TIIIPを一定と
し、ワイヤ送給量に応じて期間TmNを変化させること
によう,いずれのワイヤ送給量に3いても良好な結果を
得ることができた。Table 1: By keeping the current Ir+psImM$P and the period TIIIP constant and changing the period TmN according to the wire feed rate, good results could be obtained at any wire feed rate.
11
なお、本実施例においては、電圧設定器18を1個とし
たが、たとえば第4図に示す電圧検出回路17のように
′屯圧VIm1%VINの両者を検出できるものと2個
の電圧設定器18とを組合わせ、それぞれに対応する電
圧を設定するようにしてもよい。11 In this embodiment, one voltage setting device 18 is used, but for example, a voltage detection circuit 17 shown in FIG. They may be combined with the setting device 18 to set the respective voltages.
また、出力端子晟圧を一定に保つための制御対象は期間
Tlllliに限られるものではなく、期間TInP1
覗流Impあるいは電流INNのいづれかを制御するよ
うにしても同様の効果を碍ることができる。さらに、電
圧V B P s V M Nの両者を検出する場合、
九゛とえば電圧VIPで期間TIIiNを、電圧■BM
で電流Impを制御するようにしてもよい。Furthermore, the control target for keeping the output terminal voltage constant is not limited to the period Tlllli, but the period TInP1
Similar effects can be achieved by controlling either the peek current Imp or the current INN. Furthermore, when detecting both voltages V B P s V M N,
For example, if the voltage VIP is the period TIIiN, the voltage ■BM
The current Imp may also be controlled by.
第6図は本発明による溶接装置の第2の実施例図である
。なか、弟2図と同じものは同一の符号を付してある。FIG. 6 is a diagram showing a second embodiment of the welding device according to the present invention. Items that are the same as the younger brother 2 are given the same reference numerals.
同図に訃いて、31、32は電圧設定器で、出力側イン
バーク8が出力する電圧値Vi+p&よび切換スイッチ
15は、矩形波発生器11からの信号により1電圧設定
器31と期間T1cp設定器9が、また、電圧設定器3
2と期間TIIIN設定器10がそれぞれ同期するよう
にして電圧設定器31、32をパルス幅制御回路3に接
続する。すなわち、出力側インバータ8の出力特性は定
電圧特性にしてある。In the same figure, 31 and 32 are voltage setting devices, and the voltage value Vi+p & which the output side inverter 8 outputs and the changeover switch 15 are set to 1 voltage setting device 31 and period T1cp setting device according to the signal from the rectangular wave generator 11. 9 is also the voltage setting device 3
The voltage setters 31 and 32 are connected to the pulse width control circuit 3 so that the voltage setter 2 and the period TIIIN setter 10 are synchronized with each other. That is, the output characteristic of the output side inverter 8 is a constant voltage characteristic.
また、ワイヤ送給量設定器24は期間TIN設定器10
に接続されて>B,ワイヤ送給量を設定すると、第7図
に示すように、期間Tinが略指数関数的に変化するよ
うになっている。Further, the wire feed amount setting device 24 is connected to the period TIN setting device 10.
When connected to >B and the wire feed rate is set, the period Tin changes approximately exponentially, as shown in FIG.
以下、動作について説明する。The operation will be explained below.
溶接に先立ち、電圧設定器31、32および期間TIF
設定器9およびワイヤ送給量設定器24によシ、電圧値
VIP%VIN%期間Tmp>よびワイヤ送給量を定め
る。なか、上記したように、ワイヤ送給量を設定するこ
とにより期間TIIINも設定される。Prior to welding, voltage setting devices 31, 32 and period TIF
The voltage value VIP%VIN% period Tmp> and the wire feeding amount are determined by the setting device 9 and the wire feeding amount setting device 24. Among them, as described above, the period TIIIN is also set by setting the wire feeding amount.
溶接時、期間TIFに同期してワイヤ20の先端に形成
される溶滴が溶融池へ移行し、期間TiNにおいてアー
クの維持シよび若干の溶滴形威が行なわれ、いづれの期
間にかいても、アークはほぼ真直になる。During welding, the droplet formed at the tip of the wire 20 is transferred to the molten pool in synchronization with the period TIF, and during the period TiN, the arc is maintained and the droplet is slightly shaped. Also, the arc becomes almost straight.
また、出力側インバータ8の出力特性は定電圧特性であ
るから、電源特性に起因するアーク長の自己制御作用に
よシ、アーク長はほぼ一定となる。Further, since the output characteristic of the output side inverter 8 is a constant voltage characteristic, the arc length becomes almost constant due to the self-control action of the arc length due to the power supply characteristics.
第2表は0. 9 wILti3の軟鋼ソリッドワイヤ
を用いて、シールドガスとしてArガス80%+COz
ガス20優の交流溶接を行った場合の一例である。Table 2 shows 0. 9 Using wILti3 mild steel solid wire, 80% Ar gas + COz as shielding gas
This is an example of AC welding using 20% gas.
第2表
電圧V I p,V yn w>ヨび期間TIIIPを
一定とし、ワイヤ送給量に応じて期間Tmaを変化させ
ることによう、いづれのワイヤ送給量にトいても良好な
結果を得ることができた。Table 2 Voltage V I p, V yn w I was able to get it.
なk1本実施例に訃いては、ワイヤ送給童設定器24と
期間TIc)i設定器10とを接続し、ワイヤ送給量の
設定値に連動して期間TENの値が変わるようにしたが
、たとえば、第6図の関係をデータシートとして準備し
ておき、個別に設定するようにしてもよいことは言うま
でもない。In this embodiment, the wire feed setting device 24 and the period TIc)i setting device 10 are connected so that the value of the period TEN changes in conjunction with the wire feeding amount setting value. However, it goes without saying that, for example, the relationships shown in FIG. 6 may be prepared as a data sheet and set individually.
第8図は本発明による溶接装置の第3の実施例図である
。なか、第2図と同じものは同一の符号を付してある。FIG. 8 is a diagram showing a third embodiment of the welding device according to the present invention. Among them, the same parts as in FIG. 2 are given the same reference numerals.
同図において、35は電流設定器で、出力側イ/バータ
8が出力する電流値Idを設定するものである。なお、
電流値Idは、第9図ないし第10図に示すように、電
流値I′Epから漸減する値あるいは電流値IEPよシ
も小さい値(ただし、いづれもワイヤはプラス)で、期
間Td設定器36で設定される期間Tdだけ流れる。In the figure, 35 is a current setting device that sets the current value Id output by the output side inverter 8. In addition,
As shown in Figures 9 and 10, the current value Id is a value that gradually decreases from the current value I'Ep or a value that is smaller than the current value IEP (however, the wire is positive in both cases), and the period Td setting device The time period Td set at 36 continues.
37は切換スイッチで、矩形波発生器11からの信号に
よシ、電流設定器13と期間Tgp設定器9が、電流設
定器35と期間Td設定器36が電流設定器14と期間
TEN設定器10がそれぞれ同期するようにしている。Reference numeral 37 denotes a changeover switch, which, depending on the signal from the square wave generator 11, switches the current setter 13 and the period Tgp setter 9, the current setter 35 and the period Td setter 36, and the current setter 14 and the period TEN setter. 10 are synchronized with each other.
以下、動作について説明する。The operation will be explained below.
溶接に先立ち、電流設定器13.35.14$1−よび
期間TEP設定器9、期間Td設定器36によシ、電流
値Izp+Id+IIDNν工び期間Txp+Td6定
める。また、電圧設定器18Kよク電圧値■を、ワイヤ
送給董設定器24によクワイヤ送給量を設定する。Prior to welding, the current value Izp+Id+IIDNν and the working period Txp+Td6 are determined using the current setting device 13, 35, 14 $1-, the period TEP setting device 9, and the period Td setting device 36. Further, the voltage setting device 18K sets the choir voltage value (2) and the wire feeding amount setting device 24 sets the wire feeding amount.
溶接時の動作については、上記第1の実施例とほぼ同じ
であるから、第1の実施例と異なる点のみ説明する。す
なわち、第3の実施例においてはアーク音が低減すると
ともに、アークの安定性がよシー層向上し、溶接作業性
が向上する。Since the operation during welding is almost the same as that of the first embodiment, only the differences from the first embodiment will be explained. That is, in the third embodiment, arc noise is reduced, arc stability is further improved, and welding workability is improved.
第3表は、0.9馴φの軟鋼ソリッドワイヤを用いて、
シールドガスArガス100−のミグ交流溶接を行った
場合の一例であシ、上記した第1表ないし第2表の場合
と同様に良好な結果が得られなお、第8図において2点
鎖線で示すように、出力レベルの設定器51およびその
設定値に応じたワイヤ送給量、出力電圧v1期間TEN
の設定値を指令する関数発生器52を設けると、溶接条
件の一元設定が可能となる。Table 3 shows that using a mild steel solid wire with a diameter of 0.9,
This is an example of MIG AC welding using Ar gas as a shielding gas of 100%. Good results were obtained in the same manner as in Tables 1 and 2 above. As shown, the output level setter 51, the wire feeding amount according to the setting value, and the output voltage v1 period TEN
By providing a function generator 52 that commands the set value of , it becomes possible to uniformly set the welding conditions.
なお、この第3の実施例においては電流値Idをスロー
プ状あるいは階段状に変化させたが、上記した第2の実
施例に訃いても、期間Td設定器および期間Tdにおけ
る電圧を設定する電圧設定器を付加し、電圧値をスロー
プ状あるいは階段状に変化させれば同様の効果を得るこ
とができる。In addition, in this third embodiment, the current value Id is changed in a slope-like or step-like manner, but even if the above-mentioned second embodiment is changed, the period Td setting device and the voltage for setting the voltage in the period Td can be changed. A similar effect can be obtained by adding a setting device and changing the voltage value in a slope or stepwise manner.
さらに、上記した第1ないし第3の実施例に釦いては、
出力側インバータ8の出力特性を定電流あるいは定電圧
特性に因定したが、例えば、EP期間を定電圧特性に、
EN期間を定電流特性にするようにしてもよい。Furthermore, regarding the above-mentioned first to third embodiments,
Although the output characteristics of the output side inverter 8 are based on constant current or constant voltage characteristics, for example, if the EP period is made into constant voltage characteristics,
The EN period may have constant current characteristics.
以上詳述したように、本発明によれば、消耗電極式ガス
シールドアーク溶接においてワイヤをプ2スにする期間
とその期間における出力レベル釦4.
よびワイヤをマイナスにする期間の出力レベルk一定と
し、ワイヤ送給量の増/減に応じてワイヤをマイナスに
する期間を短/長とする交流出力をワイヤと母材間に印
加するから、小電流範囲まで溶接が可能で、しかも、ワ
イヤをプラスにする期間に同期してワイヤ先端に形成さ
れる溶滴を溶融地へ移行させることができる。また、小
電流範囲にかいても有害なアーク切れや、アークのふら
つきは発生しない。As described in detail above, according to the present invention, the period in which the wire is turned on in consumable electrode type gas shielded arc welding and the output level button 4 during that period. Since the output level k is constant during the period in which the wire is made negative and the period in which the wire is made negative, and the alternating current output is applied between the wire and the base material, the period in which the wire is made negative is shortened or lengthened depending on the increase/decrease in the wire feeding amount. Welding is possible up to a small current range, and droplets formed at the tip of the wire can be transferred to the molten area in synchronization with the period when the wire is turned positive. Furthermore, even when applied to a small current range, harmful arc breakage and arc fluctuations do not occur.
従って、溶接作業性および溶接部の品質を向上させるこ
とができるという効果がある。Therefore, there is an effect that the welding workability and the quality of the welded part can be improved.
第1図は本発明による消耗電極式ガスシールドアーク溶
接方法の出力特性例。第2図は溶接装置の第1の実施例
図。第3図は第1の実施例に釦ける電圧値Vと期間TE
Nとの関係を示す図。第4図、第5図は第1の実施例に
おける電圧検出回路の例。第6図は溶接装置の第2の実
施例図。第7図は第2の実施例におけるフイヤ送給量と
期間TINとの関係を示す図。第8図は溶接装置の第3
の実施例図。第9図、第10図は第3の実施例における
特性の説明図である。
1・・・入力側整流器、 2・・・M 0 8 −
F E T .3・・・パルス幅制御回路、 4・・・
溶接トランス、5・・・出力側整流器、 7・・・電流
検出器、 8・・・出力側インパータ、 9・・・期
間Tip設定器、10゜゜゜期間TICN設定器、 1
3,14.35・・・電流設定器、 15・・・切換
スイッチ、16・・・wA差増幅器、 17・・・電
圧検出一路、 18,31.32・・・竃圧設定器、
19・・・比較器、20・・・ワイヤ、 24・・
・ワイヤ送給址設定器、25・・・母材、 36・・・
期間Td設定器。FIG. 1 shows an example of the output characteristics of the consumable electrode type gas-shielded arc welding method according to the present invention. FIG. 2 is a diagram of a first embodiment of the welding device. Figure 3 shows the voltage value V and period TE that can be pressed in the first embodiment.
A diagram showing the relationship with N. FIG. 4 and FIG. 5 are examples of the voltage detection circuit in the first embodiment. FIG. 6 is a diagram showing a second embodiment of the welding device. FIG. 7 is a diagram showing the relationship between the fire feed amount and the period TIN in the second embodiment. Figure 8 shows the third welding device.
Example diagram. FIGS. 9 and 10 are explanatory diagrams of characteristics in the third embodiment. 1...Input side rectifier, 2...M08-
FET. 3...Pulse width control circuit, 4...
Welding transformer, 5... Output side rectifier, 7... Current detector, 8... Output side imperter, 9... Period Tip setting device, 10゜゜゜ period TICN setting device, 1
3,14.35...Current setting device, 15...Selector switch, 16...WA difference amplifier, 17...Voltage detection circuit, 18,31.32...Boat pressure setting device,
19... Comparator, 20... Wire, 24...
・Wire feed setting device, 25...Base material, 36...
Period Td setter.
Claims (1)
の出力レベルおよび電極をマイナスにする期間の出力レ
ベルを一定とし、電極送給量の増/減に応じて電極をマ
イナスにする期間を短/長とする交流出力を電極と母材
間に印加することを特徴とする消耗電極式ガスシールド
アーク溶接における交流アーク溶接方法。 2、電極をプラスにする期間を、出力レベルを一定にす
る期間と、この期間に連続し出力レベルが上記出力レベ
ルより小さい期間とで構成するようにしたことを特徴と
する特許請求の範囲第1項記載の消耗電極式ガスシール
ドアーク溶接における交流アーク溶接方法。3、あらか
じめ出力の端子電圧の値またはアーク電圧の値を定めて
おき、溶接時に出力の端子電圧またはアーク電圧を測定
して、この測定値があらかじめ定めた値と等しくなるよ
うに電極をプラスあるいはマイナスにする期間もしくは
電極をプラスあるいはマイナスにする期間における電流
値のうちの少なくとも1つを増減させることを特徴とす
る消耗電極式ガスシールドアーク溶接における交流アー
ク溶接方法。 4、直流電源と、直流出力レベルを設定する少なくとも
2つの出力設定手段と、出力設定手段に接続され出力設
定手段の設定値により直流電源を制御する制御手段と、
直流出力を交流出力に変換する変換手段と、変換手段に
接続され電極プラス期間および電極マイナス期間を設定
する期間設定手段とからなり、期間設定手段と出力設定
手段とを同期させたことを特徴とする消耗電極式ガスシ
ールドアーク溶接における交流アーク溶接装置。 5、直流出力レベルの出力設定手段が電圧設定手段であ
り、直流電源の出力特性が定電圧特性であることを特徴
とする特許請求の範囲第4項記載の消耗電極式ガスシー
ルドアーク溶接における交流アーク溶接装置。 6、直流出力レベルの出力設定手段が電流設定手段であ
り、直流電源の出力特性が定電流特性であるとともに、
出力の端子電圧またはアーク電圧の値を一定に保つ手段
を設けたことを特徴とする特許請求の範囲第4項記載の
消耗電極式ガスシールドアーク溶接における交流アーク
溶接装置。 7、電極プラス期間と電極マイナス期間とにおける直流
電源の出力特性が異なることを特徴とする特許請求の範
囲第4項記載の消耗電極式ガスシールドアーク溶接にお
ける交流アーク溶接装置。 8、電極送給量、出力の端子電圧あるいは電極マイナス
期間のうちの少なくとも2つと、直流出力レベルの出力
設定手段とを連動させたことを特徴とする特許請求の範
囲第4項ないし第7項のいづれかに記載の消耗電極式ガ
スシールドアーク溶接における交流アーク溶接装置。[Claims] 1. The output level during the period when the electrode is positive, the output level during the period when the electrode is negative, and the output level during the period when the electrode is negative are constant, and the electrode An alternating current arc welding method in consumable electrode type gas shielded arc welding, characterized by applying an alternating current output between an electrode and a base material for short/long periods of time in which the negative value is negative. 2. The period in which the electrode is made positive consists of a period in which the output level is kept constant, and a period in which the output level is lower than the output level, which is continuous with this period. The AC arc welding method in consumable electrode type gas shielded arc welding according to item 1. 3. Determine the value of the output terminal voltage or arc voltage in advance, measure the output terminal voltage or arc voltage during welding, and set the electrode to a positive or An alternating current arc welding method in consumable electrode type gas shielded arc welding, characterized by increasing or decreasing at least one of the current value during a period in which the current value is negative or a period in which the electrode is positive or negative. 4. A DC power supply, at least two output setting means for setting a DC output level, and a control means connected to the output setting means for controlling the DC power supply according to a set value of the output setting means;
It is characterized by comprising a conversion means for converting DC output into AC output, and a period setting means connected to the conversion means and setting an electrode positive period and an electrode negative period, and the period setting means and the output setting means are synchronized. AC arc welding equipment for consumable electrode type gas shielded arc welding. 5. The AC in consumable electrode type gas shielded arc welding according to claim 4, wherein the output setting means for the DC output level is a voltage setting means, and the output characteristic of the DC power supply is a constant voltage characteristic. Arc welding equipment. 6. The output setting means for the DC output level is a current setting means, the output characteristics of the DC power supply are constant current characteristics, and
5. The AC arc welding apparatus for consumable electrode type gas shielded arc welding according to claim 4, further comprising means for keeping the value of the output terminal voltage or arc voltage constant. 7. The AC arc welding device for consumable electrode type gas shielded arc welding according to claim 4, characterized in that the output characteristics of the DC power source are different between the electrode positive period and the electrode negative period. 8. Claims 4 to 7, characterized in that at least two of the electrode feeding amount, the output terminal voltage, or the negative electrode period are linked with the output setting means for the DC output level. AC arc welding equipment for consumable electrode type gas shielded arc welding according to any one of the above.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18737789A JP2854613B2 (en) | 1989-07-21 | 1989-07-21 | AC arc welding method and apparatus for consumable electrode type gas shielded arc welding |
DE4023155A DE4023155C2 (en) | 1989-07-21 | 1990-07-20 | AC inert gas arc welding process and consumable electrode device |
US07/556,096 US5225660A (en) | 1989-07-21 | 1990-07-23 | Consumable-electrode ac gas shield arc welding method and apparatus therefor |
US08/064,987 US5349159A (en) | 1989-07-21 | 1993-05-24 | Consumable-electrode AC gas shield arc welding method and apparatus therefor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18737789A JP2854613B2 (en) | 1989-07-21 | 1989-07-21 | AC arc welding method and apparatus for consumable electrode type gas shielded arc welding |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0352769A true JPH0352769A (en) | 1991-03-06 |
JP2854613B2 JP2854613B2 (en) | 1999-02-03 |
Family
ID=16204947
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18737789A Expired - Lifetime JP2854613B2 (en) | 1989-07-21 | 1989-07-21 | AC arc welding method and apparatus for consumable electrode type gas shielded arc welding |
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Country | Link |
---|---|
JP (1) | JP2854613B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003062668A (en) * | 2001-08-23 | 2003-03-05 | Daihen Corp | Control method for feeding in a/c gas shielded arc welding |
US6600135B2 (en) | 2000-09-12 | 2003-07-29 | Daihen Corporation | Method and apparatus for controlling AC pulse arc welding and welding power source apparatus |
JP2006102813A (en) * | 2004-10-06 | 2006-04-20 | Lincoln Global Inc | Alternating current welding method using cored electrode |
-
1989
- 1989-07-21 JP JP18737789A patent/JP2854613B2/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6600135B2 (en) | 2000-09-12 | 2003-07-29 | Daihen Corporation | Method and apparatus for controlling AC pulse arc welding and welding power source apparatus |
JP2003062668A (en) * | 2001-08-23 | 2003-03-05 | Daihen Corp | Control method for feeding in a/c gas shielded arc welding |
JP4673519B2 (en) * | 2001-08-23 | 2011-04-20 | 株式会社ダイヘン | Feed control method for AC gas shielded arc welding |
JP2006102813A (en) * | 2004-10-06 | 2006-04-20 | Lincoln Global Inc | Alternating current welding method using cored electrode |
Also Published As
Publication number | Publication date |
---|---|
JP2854613B2 (en) | 1999-02-03 |
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