JPS62114772A - Mig welding method - Google Patents
Mig welding methodInfo
- Publication number
- JPS62114772A JPS62114772A JP25322685A JP25322685A JPS62114772A JP S62114772 A JPS62114772 A JP S62114772A JP 25322685 A JP25322685 A JP 25322685A JP 25322685 A JP25322685 A JP 25322685A JP S62114772 A JPS62114772 A JP S62114772A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- wire
- current
- droplet
- generated
- 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
Links
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- Arc Welding In General (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は各種溶接構造物の溶接に用いられるＭＩＧ溶接
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a MIG welding method used for welding various welded structures.
ＭＩＧ溶接とはガスシールドアーク溶接の一種で、第５
図にＭＩＧ溶接機の概要を示す。ここで１が溶接金属、
２が母材、３が溶接アーク。MIG welding is a type of gas shielded arc welding.
The figure shows an overview of the MIG welding machine. Here 1 is weld metal,
2 is the base metal, 3 is the welding arc.
４が溶接ワイヤ、５が給電チップ、６がシールドガス、
７がノズル、８がワイヤ送給ローラ。4 is a welding wire, 5 is a power supply tip, 6 is a shielding gas,
7 is a nozzle, 8 is a wire feeding roller.
９が直流溶接電源である。突合せ溶・接の場合。9 is a DC welding power source. For butt welding/welding.
母材２とは（１同じ材質の消耗溶接ワイヤ４をワイヤ送
給ローラ８で連続的に送給し、 Ａｒ 、 Ｈｅ等のシ
ールドガス６中で母材２と溶接ワイヤ４を溶融し、金属
を接合するもので、一般にアーク発生源として直流溶接
電源９を使用し、溶接ワイヤ４をプラスとする極性で溶
接を行う。The base material 2 is (1) a consumable welding wire 4 of the same material is continuously fed by a wire feed roller 8, the base material 2 and the welding wire 4 are melted in a shielding gas 6 such as Ar, He, etc. Generally, a DC welding power source 9 is used as an arc generation source, and welding is performed with the polarity of the welding wire 4 being positive.
この溶接の特徴は、はとんどすべての金属の溶接に適用
でき、さらに非消耗電極を用いるＴＩＧ溶接の２〜３倍
の溶接能率が得られることのほか、大電流域での溶滴移
行は第６図に示す様に溶滴１０が極めて細かくなり、溶
接アーク３は安定しビード表面は平滑で、スパッタも少
く、美しいビード外観が得られる。しかし小電流域では
第７図のように溶滴１０は大きくなっておちる。この間
溶滴１０は溶接ワイヤ４の先端で不規則に動き、母材２
との間で短絡をくり返えす。したがって、ビード表面は
平滑でなく、またスパッタの発生も多くなる。したがっ
て大電流が用いられない薄板や全姿勢溶接、さらに入熱
制限の必要な低温用鋼等には使用が不可能であっだ。The characteristics of this welding method are that it can be applied to welding almost all metals, has a welding efficiency 2 to 3 times higher than TIG welding using non-consumable electrodes, and is capable of droplet transfer in a large current range. As shown in FIG. 6, the droplets 10 are extremely fine, the welding arc 3 is stable, the bead surface is smooth, there is little spatter, and a beautiful bead appearance is obtained. However, in a small current range, the droplet 10 becomes large and falls as shown in FIG. During this time, the droplet 10 moves irregularly at the tip of the welding wire 4, and the base metal 2
Repeated short circuit between Therefore, the bead surface is not smooth and spatter is often generated. Therefore, it cannot be used for thin plates or all-position welding where large currents are not used, and for low-temperature steel where heat input must be restricted.
この対策としてパルスアーク溶接が提案されている。第
８図にその電流と溶滴移行形態を示す。溶滴１０が大粒
となる小電流域と細微となる大電流域の境界を臨界電流
とよぶが、第８図の様に臨界電流Ｉｓ 以下の電流範
囲においてせん頭波をもった溶接電流を用いることによ
り溶滴１０を細粒化することができる。図中のＩｂは普
通の直流電流などで得られるほとんど平滑な波形の直流
で、これを基底電流とよび、Ｉｐはこのベース電流の上
に重畳されたパルス電流、 ＩａはこのＩｂとＩｐの和
の平均値で、これがワイヤ送給速度と見合った溶接電流
に相当する。一方Ｉｃはこのワイヤに対する臨界電流値
である。パルスアーク溶接の欠点は、パルス電流発生電
源が必要となり機器の価格が高くなること。さらに従来
の溶接電流、アーク電圧（平均値）のほかにパルス電流
（ヒーク値）パルス幅、パルス周波数、基底電流などが
加わるため溶接条件設定が複雑となる。Pulsed arc welding has been proposed as a countermeasure to this problem. FIG. 8 shows the current and droplet transfer form. The boundary between the small current region where the droplets 10 become large and the large current region where the droplets become fine is called the critical current, and as shown in Figure 8, a welding current with a peak wave is used in the current range below the critical current Is. This allows the droplets 10 to be made finer. Ib in the figure is a direct current with an almost smooth waveform obtained from ordinary direct current, etc., and this is called the base current, Ip is the pulse current superimposed on this base current, and Ia is the sum of this Ib and Ip. This is the average value of and corresponds to the welding current commensurate with the wire feeding speed. On the other hand, Ic is the critical current value for this wire. The disadvantage of pulsed arc welding is that it requires a pulsed current generating power source, which increases the cost of the equipment. Furthermore, in addition to the conventional welding current and arc voltage (average value), welding condition settings become complicated because pulse current (heak value) pulse width, pulse frequency, base current, etc. are added.
〔発明が解決しようとする問題点〕
上述のように、従来ＭＩＧ溶接法は、大電流が用いられ
ない薄板や全姿勢溶接、入熱制限の必要な低温用鋼の溶
接には使用でき難い不都合があり、またこのＭＩＧ溶接
の小電流域における欠陥回避葦カーてのパルスアーク溶
接においては、装置費が嵩む上に操作が複雑化する不都
合がある。[Problems to be solved by the invention] As mentioned above, the conventional MIG welding method has the disadvantage that it cannot be used for welding thin plates or all-position welding where large currents are not used, and for welding low-temperature steel that requires heat input restriction. In addition, pulse arc welding using a defect avoidance method in the small current range of MIG welding has disadvantages such as increased equipment costs and complicated operations.
本発明は、上記問題点を解決するために、溶接ワイヤに
軸線にクロスする方向の超音波振動をあたえながら溶接
することを特徴とし、もってワイヤ先端の溶滴を微細化
し、母材への移行を安定化させ得るＭＩＧ溶接法を提供
する。In order to solve the above-mentioned problems, the present invention is characterized in that welding is performed while applying ultrasonic vibrations to the welding wire in a direction crossing the axis, thereby making the droplets at the tip of the wire finer and causing them to migrate to the base metal. Provides a MIG welding method that can stabilize the
本発明のＭＩＧ溶接法は上記構成により溶接ワイヤに高
速の超音波振動をあたえることにより、アークによって
生じた溶接ワイヤの先端の溶滴が太きくならない内にふ
り落とすことにより、超微細な溶滴が生じ直流低電流域
でもスパッタのない安定な溶接が可能となる。The MIG welding method of the present invention applies high-speed ultrasonic vibrations to the welding wire with the above configuration, thereby shaking off the droplets at the tip of the welding wire generated by the arc before they become thick, thereby forming ultra-fine droplets. This enables stable welding without spatter even in the low DC current range.
以下本発明を図面に示す実施例に基づいて具体的に説明
する。The present invention will be specifically described below based on embodiments shown in the drawings.
第１図は本発明の一実施例に係るＭＩＧ溶接法の概念図
である。図中の１は溶着金属、２は母材、３は溶接アー
ク、４は溶接ワイヤ、５は給電チップ、６はシールドガ
ス、７はノズル。FIG. 1 is a conceptual diagram of a MIG welding method according to an embodiment of the present invention. In the figure, 1 is the welding metal, 2 is the base material, 3 is the welding arc, 4 is the welding wire, 5 is the power supply tip, 6 is the shielding gas, and 7 is the nozzle.
８はワイヤ送給ローラ、９は直流溶接電源、１０は溶滴
、１１は超音波振動子、１２は連結材、１３は超音波振
動子１駆動電源である。8 is a wire feeding roller, 9 is a DC welding power source, 10 is a droplet, 11 is an ultrasonic vibrator, 12 is a connecting member, and 13 is a power source for driving the ultrasonic vibrator 1.
直流溶接電源９によって溶接ワイヤ４と母材２との間で
アーク３が発生しワイヤ４の先端に溶滴が生じる。これ
を、超音波振動子１１によって発生した超音波振動を連
結材１２によって給電チップ５に伝え、溶接ワイヤ４を
軸線にクロスする方向に振動させ、第２図に示す様に溶
滴を微細粒として母材へ移行させる。An arc 3 is generated between the welding wire 4 and the base metal 2 by the DC welding power source 9, and a droplet is generated at the tip of the wire 4. The ultrasonic vibrations generated by the ultrasonic vibrator 11 are transmitted to the power feeding tip 5 through the connecting member 12, and the welding wire 4 is vibrated in a direction crossing the axis, so that the droplets are transformed into fine particles as shown in FIG. It is transferred to the base material as
次に第３図、第４図は直径１．６Ｍの軟鋼溶接ワイヤと
Ａｒ＋２０％ＣＯ２のシールドガスを用い。Next, in Figures 3 and 4, a mild steel welding wire with a diameter of 1.6M and a shielding gas of Ar + 20% CO2 were used.
５０ ＫＨｚの超音波振動を与え種々の溶接電流で溶接
を行い、溶滴の移行を高速度カメラで撮影し。Welding was performed using 50 KHz ultrasonic vibration and various welding currents, and the transfer of droplets was photographed using a high-speed camera.
１００％）を従来法と比較して測定したものである。100%) compared with the conventional method.
第３図において、■は溶滴の体積、■は溶接電流、Ａは
超音波振動を与えない場合、Ｂは本発明により超音波振
動を与えた場合である。これより溶接電流１００ Ａ以
下でも安定した微細溶滴が移行していることがわかる。In FIG. 3, ■ is the volume of the droplet, ■ is the welding current, A is when no ultrasonic vibration is applied, and B is when ultrasonic vibration is applied according to the present invention. This shows that stable fine droplets are transferred even at a welding current of 100 A or less.
また第４図において、Ｓはスパッタ率であるが、Ｂで示
す本発明による超音波振動の付与により、Ａで示す従来
方法に比較して著しくスパッタを低減できることがわか
る。尚超音波周波数は溶接ワイヤの径、溶接電流等によ
って１５ｋＨｚ〜１０ＭＨｚの間で最適値を選定する。Further, in FIG. 4, S is the sputtering rate, and it can be seen that by applying the ultrasonic vibration according to the present invention shown by B, spatter can be significantly reduced compared to the conventional method shown by A. The optimum ultrasonic frequency is selected between 15 kHz and 10 MHz depending on the diameter of the welding wire, welding current, etc.
以上具体的に説明した様に９本発明において溶接ワイヤ
に軸線にクロスする方向の超音波振動を与えることによ
り微細な溶滴を生じさせ。As specifically explained above, in the present invention, fine droplets are generated by applying ultrasonic vibrations to the welding wire in a direction crossing the axis.
安定した溶滴移行が可能となり、高価なパルス溶接電源
を用いなくとも巾広い溶接電流範囲においてスパッタの
ない安定な溶接が可能となり。Stable droplet transfer becomes possible, and stable welding without spatter is possible over a wide welding current range without using an expensive pulse welding power source.
コスト低減と溶接品質の向上がはかれる等、多くの利点
を有する。It has many advantages such as reducing costs and improving welding quality.
第１図は本発明ＭＩＧ溶接法の一実施例の要領図、第２
図は同上における溶接ワイヤ先端の溶滴移行状況モデル
、第３図は同上における溶滴の平均体積と溶接電流との
関係の図表、第４図はスパッタ率と溶接電流との関係の
図表、第５図は従来ＭＩＧ溶接法の要領図、第６図は同
上における高電流域での溶滴移行状況のモデル。
第７図は低電流域での溶滴移行状況のモデル。
第８図はパルス電流を用いた場合の溶滴移行状況のモデ
ルを示す。
１・・・溶着金属、２・・・母材、３ ・溶接アーク。
４・・・溶接ワイヤ、５・・・給電チップ、６・・・シ
ールドガス、７・・・ノズル、８・・ワイヤ送給ローラ
。
９・・・直流溶接電源、１０・・・溶滴、１１・・・超
音波振動子、 １２・・・連結材、１３・・・超音波
振動子、駆動電源Figure 1 is a schematic diagram of one embodiment of the MIG welding method of the present invention, Figure 2
The figure is a model of the droplet transfer situation at the tip of the welding wire in the same as above, Figure 3 is a graph of the relationship between the average droplet volume and welding current in the same as above, Figure 4 is a graph of the relationship between sputter rate and welding current, Figure 5 is a schematic diagram of the conventional MIG welding method, and Figure 6 is a model of the droplet transfer situation in the high current range in the same as above. Figure 7 shows a model of droplet transfer in the low current range. FIG. 8 shows a model of the droplet transfer situation when pulsed current is used. 1... Welding metal, 2... Base metal, 3 - Welding arc. 4... Welding wire, 5... Power feeding tip, 6... Shielding gas, 7... Nozzle, 8... Wire feeding roller. 9... DC welding power source, 10... Droplet, 11... Ultrasonic vibrator, 12... Connecting material, 13... Ultrasonic vibrator, drive power source
Claims (1)
をあたえながら、溶接を行なうことを特徴とするＭＩＧ
溶接法。MIG is characterized in that welding is performed while applying ultrasonic vibration to the MIG welding wire in a direction that crosses the axis.
Welding method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25322685A JPS62114772A (en) | 1985-11-12 | 1985-11-12 | Mig welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25322685A JPS62114772A (en) | 1985-11-12 | 1985-11-12 | Mig welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62114772A true JPS62114772A (en) | 1987-05-26 |
Family
ID=17248320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25322685A Pending JPS62114772A (en) | 1985-11-12 | 1985-11-12 | Mig welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62114772A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03151168A (en) * | 1989-11-07 | 1991-06-27 | Mitsubishi Heavy Ind Ltd | Consumable electrode gas shielded arc welding method |
| JP2009148790A (en) * | 2007-12-20 | 2009-07-09 | Kobe Steel Ltd | Consumable electrode type welding torch |
| CN101947696A (en) * | 2010-09-26 | 2011-01-19 | 哈尔滨工业大学 | Welding device for compounding ultrasonic focusing sound field with molten pole arc welding |
| CN103143848A (en) * | 2013-03-26 | 2013-06-12 | 哈尔滨工业大学（威海） | Vertical welding method for applying ultrasonic-arc hybrid |
-
1985
- 1985-11-12 JP JP25322685A patent/JPS62114772A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03151168A (en) * | 1989-11-07 | 1991-06-27 | Mitsubishi Heavy Ind Ltd | Consumable electrode gas shielded arc welding method |
| JP2009148790A (en) * | 2007-12-20 | 2009-07-09 | Kobe Steel Ltd | Consumable electrode type welding torch |
| CN101947696A (en) * | 2010-09-26 | 2011-01-19 | 哈尔滨工业大学 | Welding device for compounding ultrasonic focusing sound field with molten pole arc welding |
| CN103143848A (en) * | 2013-03-26 | 2013-06-12 | 哈尔滨工业大学（威海） | Vertical welding method for applying ultrasonic-arc hybrid |
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