JPS62179872A - Arc welding method for light metal - Google Patents
Arc welding method for light metalInfo
- Publication number
- JPS62179872A JPS62179872A JP2275386A JP2275386A JPS62179872A JP S62179872 A JPS62179872 A JP S62179872A JP 2275386 A JP2275386 A JP 2275386A JP 2275386 A JP2275386 A JP 2275386A JP S62179872 A JPS62179872 A JP S62179872A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- work
- workpiece
- welding torch
- 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.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 72
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 11
- 239000002184 metal Substances 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims description 23
- 239000011261 inert gas Substances 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 abstract description 10
- 230000035515 penetration Effects 0.000 abstract description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 9
- 239000010937 tungsten Substances 0.000 description 9
- 229910052721 tungsten Inorganic materials 0.000 description 9
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000010953 base metal Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Arc Welding In General (AREA)
Abstract
Description
【発明の詳細な説明】
（発明の目的）
（産業上の利用分野）
本発明は、例えば、アルミニウムやアルミニウム合金に
よる軽金属のワークを不活性ガス雰囲気中の非消耗電極
で溶接する軽金属のアーク溶接方法（ＴＩＧｗｊ接方法
）に関する。Detailed Description of the Invention (Objective of the Invention) (Industrial Field of Application) The present invention is applicable to light metal arc welding in which light metal workpieces made of aluminum or aluminum alloy are welded using a non-consumable electrode in an inert gas atmosphere. Regarding the method (TIGwj contact method).
（従来の技術）
従来、この種のアルミニウムやアルミニウム合金等の軽
金属によるワークのアーム溶接方法には、（１）、交流
ＴＩＧ法（ＡＣ，ＴＴＧ法）と（２）、直流正極性ＴＩ
Ｇ法（ＤＣ８Ｐ、ＴＩＧ法）とがある。上記（１）の交
流ＴＴＧ法は、溶接電流に交流電流を用いて、その極性
が逆極性（ＲＰ）、つまり、電極が陽極（＋）であり、
母材（ワーク）が陰ＦＭ（−）であるときに、母材上に
陰極点の移動により、溶接時に障害となる母材表面の酸
化被膜の除去を行い、極性が正極性（ＳＰ） 、即ち、
電極が陰極（−）であり、母材が陽極（＋）であるとき
に、主に溶は込み得るらのであり、上記（２）の直流正
極性ＴＩＧ方法は、溶接電流に直流電流を用いて、その
電極が陰極（−）、母材（ワーク）が陽極の直流電流を
用いて溶接を行い、酸化被膜の除去は、溶接前の機械的
又は化学的手段による前処理にするようにしたものであ
る。(Prior art) Conventionally, arm welding methods for workpieces made of light metals such as aluminum and aluminum alloys include (1) alternating current TIG method (AC, TTG method) and (2) direct current positive polarity TI.
There is a G method (DC8P, TIG method). The AC TTG method in (1) above uses an AC current as the welding current, and its polarity is reverse polarity (RP), that is, the electrode is an anode (+).
When the base material (work) is negative FM (-), the cathode spot moves on the base material to remove the oxide film on the surface of the base material that would be an obstacle during welding, and the polarity becomes positive (SP). That is,
Welding mainly occurs when the electrode is a cathode (-) and the base metal is an anode (+), and the DC positive polarity TIG method in (2) above uses a DC current as the welding current. Welding was performed using direct current, with the electrode being the cathode (-) and the base material (work) being the anode, and the oxide film was removed by pretreatment by mechanical or chemical means before welding. It is something.
（発明が解°決しようとする問題点）
このように、上述した交流ＴＵＧ法は交流電流を用いる
ため、電流の極性が逆極性（ＲＰ）部分では、酸化被膜
の除去作用（クリーニング作用）が良好に行われるけれ
ども、この逆極性では溶は込み量が浅いため、全体的に
溶接時溶は込み量が浅くなり、例えば、板厚のワークで
は、上記交流ＴＩＧ法の適用が困難となり、あらたに、
ワークの溶接部に予熱を施す必要が生じる。(Problems to be Solved by the Invention) As described above, since the above-mentioned AC TUG method uses an alternating current, the oxide film removal action (cleaning action) does not occur in the part where the polarity of the current is reversed (RP). However, with this reverse polarity, the depth of penetration is shallow, so the depth of penetration during welding is shallow overall.For example, with thick workpieces, it is difficult to apply the AC TIG method, and it is difficult to apply the AC TIG method. To,
It becomes necessary to preheat the welding part of the workpiece.
又一方、直流正極性ＴＩＧ法は、直流正極性電流を用い
るため、良好な溶は込みが得られるけれども、この直流
正極性ではワークの酸化液ｎＱクリーニング作用がない
ため、酸化被膜除去の前処理が不充分であったり、前処
理後、溶接までの時間がか）り過ぎると、気孔等を生じ
るおそれがある。On the other hand, since the DC positive polarity TIG method uses a DC positive polarity current, good penetration can be obtained. If the welding time is insufficient or the time from pretreatment to welding is too long, pores may occur.
本発明の目的は、上述した事情に鑑みてなされたもので
あって、板厚のワークであっても、予熱を施すことなく
、しから、ワークの酸化被膜クリーニング作用を持ら、
深い溶は込みを１９６ようにした軽合金のアーク溶接方
法を提供するにある。The object of the present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to provide a method for cleaning the oxide film of a workpiece, even when the workpiece is thick, without preheating the workpiece.
An object of the present invention is to provide a method for arc welding light alloys with deep melt penetration.
（問題点を解決するための手段）
本発明は、不活性ガス雰囲気中に軽金属によるワークの
溶接部を配設して非消耗電極で溶接するアーク溶接方法
において、上記ワークに先行溶接トーチから直流逆極性
電流を用いて上記ワークの表面の酸化被膜を除去し、し
かる後、上記ワークの溶接部に後行溶接トーチから直流
正極性電流を用いて溶接溜りを形成し、この溶接溜りへ
供給される溶接ワイヤで溶接して深い溶は込みを得るよ
うにしたアーク溶接方法である。(Means for Solving the Problems) The present invention provides an arc welding method in which a workpiece made of a light metal is welded by a non-consumable electrode in an inert gas atmosphere, and a direct current is applied to the workpiece from a preceding welding torch. The oxide film on the surface of the workpiece is removed using a reverse polarity current, and then a welding puddle is formed at the welding part of the workpiece using a direct current positive polarity current from a trailing welding torch, and the welding puddle is supplied to the welding puddle. This is an arc welding method that achieves deep penetration by welding with a welding wire.
（作 用）
本発明は、不活性ガス雰囲気中で先行溶接トーチにより
直流逆極性電流をワークに通電して、ワーク表面の酸化
被膜を除去して地肌を露出し、シールドガスとしての不
活性ガスで地肌の再酸化を防止し、しかる後、後続溶接
トーチにより直流正極性電流をワークに通電して溶融溜
りを形成し、この溶融溜りへ供給される溶接ワイヤで溶
接する方法である。(Function) The present invention applies a DC reverse polarity current to the workpiece using a preceding welding torch in an inert gas atmosphere, removes the oxide film on the workpiece surface and exposes the bare surface, and uses an inert gas as a shielding gas. In this method, re-oxidation of the surface is prevented, and then a DC positive current is applied to the workpiece using a subsequent welding torch to form a molten puddle, and welding is performed using a welding wire supplied to this molten puddle.
（実施例）
第１図において、符号１は、例えば、アルミニウムやア
ルミニウム合金による軽金属のワークＷに対して相対的
に移動し得るアーク溶接装置におりる主枠体であって、
この主枠体１の先端部１ａには、先行溶接トーチ２が設
けられており、この先行溶接１−−チ２は、非消耗電極
としての第１タングステン電極２ａと不活性ガス３を噴
射する噴射体２ｂとで構成されている。又、上記先行溶
接トーチ２の背部の上記主枠体１には、後行溶接トーチ
４が設けられており、この後行溶接トーチ４は、３ｒ消
耗電極としての第２タングステン電極／Ｉａど不活性ガ
ス３を噴訃１する噴射体４ｂとで構成されている。さら
に、上記主枠体１の後部１ｂには、溶接ワイ）７リール
５及び複数のガイドローラ６が設けられており、この溶
接ワイヤリール５には、溶接ワイＡ７７が巻装されてお
り、この溶接ワイヤ７の一端は、上記各ガイドローラ６
を介して上記第２タングステン電極４ａの近傍の上記ワ
ークＷに延設されている。(Example) In FIG. 1, reference numeral 1 denotes a main frame included in an arc welding device that can move relative to a light metal work W made of aluminum or aluminum alloy, for example,
A pre-welding torch 2 is provided at the tip 1a of the main frame 1, and the pre-welding torch 2 injects a first tungsten electrode 2a as a non-consumable electrode and an inert gas 3. It is composed of a spray body 2b. Further, a trailing welding torch 4 is provided on the main frame 1 at the back of the preceding welding torch 2, and this trailing welding torch 4 has a second tungsten electrode/Ia as a 3r consumable electrode. It is composed of an injector 4b that injects active gas 3. Furthermore, a welding wire A77 reel 5 and a plurality of guide rollers 6 are provided at the rear part 1b of the main frame 1, and a welding wire A77 is wound around this welding wire reel 5. One end of the welding wire 7 is connected to each of the guide rollers 6 mentioned above.
It extends to the workpiece W near the second tungsten electrode 4a via the tungsten electrode 4a.
一方、上記先行溶接トーチ２には、直流逆極性電源（Ｄ
ＣＲＰ電源）８の陽極（＋）８ａがリード線９ａを通し
て接続されており、上記直流逆極性電源８の陰極（−＞
８ｂは上記ワークＷにり一ド線９ｂを通して接続されて
いる。又、上記直流逆極性電源８には、不活性ガス３に
よるシールドガス供給源１０が設けられており、このシ
ールドガス供給源１０は、上記先行溶接トーチ２の噴射
体２ｂにリード管１１を通して接続されている。On the other hand, the preceding welding torch 2 is provided with a DC reverse polarity power source (D
The anode (+) 8a of the CRP power supply 8 is connected through the lead wire 9a, and the cathode (->
8b is connected to the workpiece W through a single lead wire 9b. Further, the DC reverse polarity power supply 8 is provided with a shielding gas supply source 10 using an inert gas 3, and this shielding gas supply source 10 is connected to the injection body 2b of the preceding welding torch 2 through a lead pipe 11. has been done.
他方、上記後行溶接トーチ４には、直流正極性電源（Ｄ
Ｃ８Ｐ電１Ｂ；１）１２の陰極（−）、１２ａがリード
線１３ａを通しで接続されており、上記正極性電源１２
の陽極（＋）１２ｂは上記ワークＷにリード線１３１）
を通して接続されている。又、上記正極性電源１２には
、不活性ガス３によるシールドガス供給源１４が設けら
れており、このシールドガス供給源１４は、後行溶接ト
ーチ４の噴射体４ｂにリード管１５を通して接続されて
いる。On the other hand, the trailing welding torch 4 is connected to a DC positive polarity power source (D
C8P power supply 1B; 1) The cathode (-) of 12, 12a is connected through the lead wire 13a, and the positive polarity power supply 12
The anode (+) 12b is connected to the workpiece W with a lead wire 131).
connected through. Further, the positive polarity power supply 12 is provided with a shielding gas supply source 14 made of an inert gas 3, and this shielding gas supply source 14 is connected to the injection body 4b of the trailing welding torch 4 through a lead pipe 15. ing.
従って、不活性ガス雰囲気中で軽金属によるワークＷを
アーク溶接する場合、上記ワークＷに対してシールドガ
ス供給源１０からの不活性ガスをリード管１１を通して
先行溶接トーチ２の噴射体２ｂから噴射して不活性ガス
雰囲気を形成づる。Therefore, when arc welding a light metal workpiece W in an inert gas atmosphere, inert gas from the shielding gas supply source 10 is injected onto the workpiece W through the lead pipe 11 from the propellant 2b of the preceding welding torch 2. to form an inert gas atmosphere.
次に、上記直流逆極性電源８の直流逆極性電流を上記リ
ード線９ａを通して上記第１タングステン電＃Ａ２ａへ
通電することにより、ワークＷ表面の酸化被膜を除去Ｊ
ると同時にワークＷを予熱づる。Next, the oxide film on the surface of the workpiece W is removed by applying a DC reverse polarity current from the DC reverse polarity power source 8 to the first tungsten electrode #A2a through the lead wire 9a.
At the same time, preheat the workpiece W.
なお、このとぎ、電流値は、第１タングステン電極２ａ
の消耗を防止するために、主としてクリーニング作用を
生じるように設定する。Note that at this point, the current value is the same as that of the first tungsten electrode 2a.
In order to prevent wear and tear, the setting is made to primarily produce a cleaning action.
次に、上記ワークＷに対してシールドガス供給源１４か
らの不活性ガスをリード管１５を通して後１１溶接トー
チ４の噴射体４ｂから噴射して不活性ガス雰囲気を形成
する。しかる後、上記直流正極性電源１２の直流逆極性
電流を上記リード線１３ｂを通して上記第２タングステ
ン電極４ａへ通電することにより、上記ワークＷの溶接
部に溶融溜り１６を生成し、この’１１１融溜り１６に
上記溶接ワイｔ２リール５から供給された溶接ワイヤ７
でワークＷの溶接部を溶接する。Next, an inert gas from the shielding gas supply source 14 is injected onto the workpiece W through the lead pipe 15 from the injection body 4b of the welding torch 4 to form an inert gas atmosphere. Thereafter, a DC reverse polarity current from the DC positive polarity power supply 12 is applied to the second tungsten electrode 4a through the lead wire 13b to generate a molten pool 16 at the welding part of the workpiece W, and this '111 melt is removed. The welding wire 7 supplied from the welding wire t2 reel 5 to the pool 16
Weld the welding part of the work W.
次に、第２図に示される本発明の伯の実施例は、第１タ
ングステン電極２ａと第２タングステン電極４ａとを不
活性ガスを噴射する噴射体１７で保持するようにしたし
のであり、上述した実施例と同一のアーク溶接方法で行
われるものである。Next, in the third embodiment of the present invention shown in FIG. 2, the first tungsten electrode 2a and the second tungsten electrode 4a are held by a jetting body 17 that jets an inert gas, This is carried out using the same arc welding method as in the embodiments described above.
以上述べたように本発明によれば、先行溶接トーチ２の
直流逆極性電流と後行溶接トーチ４の直流正極性電流と
をそれぞれ独立した直流逆極性電源８と直流正極性電源
１２とで個別に設定しであるので、各電流の調整が容易
にできるようになり、ワークの種類、板厚、形状、寸法
等に応じて適切なりリーニング作用と溶接部りの形成が
可能となり、溶接の社全性及び信頼性の向上を図ること
ができる。As described above, according to the present invention, the DC reverse polarity current of the preceding welding torch 2 and the DC positive polarity current of the trailing welding torch 4 are separately controlled by the independent DC reverse polarity power supply 8 and the DC positive polarity power supply 12, respectively. Since each current can be easily adjusted, the leaning action and welding area can be formed appropriately depending on the type of workpiece, plate thickness, shape, dimensions, etc., making it possible for welding companies to It is possible to improve integrity and reliability.
第１図は、本発明による軽金属のアーク溶接方法を説明
するため０線図、第２図は、本発明の他実施例を示す図
である。
１・・・主枠体、２・・・先行溶接トーチ、３・・・不
活性ガス、４・・・後行溶接トーチ、５・・・溶接ワイ
ヤリール、７・・・溶接ワイヤ、８・・・直流逆極性電
源、１２・・・直流正極性電源。
出願人代理人 ４１ｉ 藤 −雄第２図FIG. 1 is a zero line diagram for explaining the light metal arc welding method according to the present invention, and FIG. 2 is a diagram showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Main frame body, 2... Leading welding torch, 3... Inert gas, 4... Trailing welding torch, 5... Welding wire reel, 7... Welding wire, 8... ...DC reverse polarity power supply, 12...DC positive polarity power supply. Applicant's agent 41i Fuji-O Figure 2
Claims (1)
設して非消耗電極で溶接するアーク溶接方法において、
上記ワークに先行溶接トーチから直流逆極性電流を用い
て上記ワークの表面の酸化被膜を除去し、しかる後、上
記ワークの溶接部に後行溶接トーチから直流正極性電流
を用いて溶融溜りを形成し、この溶融溜りへ供給される
溶接ワイヤで溶接するようにしたことを特徴とする軽金
属のアーク溶接方法。In an arc welding method in which the welding part of a light metal workpiece is placed in an inert gas atmosphere and welded with a non-consumable electrode,
The oxide film on the surface of the workpiece is removed by applying reverse polarity DC current from the preceding welding torch to the workpiece, and then a molten pool is formed at the welded part of the workpiece using positive polarity DC current from the trailing welding torch. A light metal arc welding method characterized in that welding is carried out using a welding wire supplied to this molten pool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2275386A JPS62179872A (en) | 1986-02-04 | 1986-02-04 | Arc welding method for light metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2275386A JPS62179872A (en) | 1986-02-04 | 1986-02-04 | Arc welding method for light metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62179872A true JPS62179872A (en) | 1987-08-07 |
Family
ID=12091448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2275386A Pending JPS62179872A (en) | 1986-02-04 | 1986-02-04 | Arc welding method for light metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62179872A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2690861A1 (en) * | 1992-05-11 | 1993-11-12 | Electricite De France | Pickling metal surfaces by electric arc for mineral, radioactive and microbiological decontamination - comprises arranging surface to be treated as cathode in enclosure contg. non-oxidising gas, arranging anode facing surface, creating electric arc to obtain circular pickling zone |
| US5859402A (en) * | 1994-12-24 | 1999-01-12 | Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. | Process for the welding of work pieces with laser beams |
| JP2010125496A (en) * | 2008-11-28 | 2010-06-10 | Jfe Steel Corp | Tandem arc welding method |
| CN103273177A (en) * | 2013-06-05 | 2013-09-04 | 天津大学 | Double-TIG (tungsten inert gas) welding system for thick plates and welding method implemented by double-TIG welding system |
| CN104708179A (en) * | 2013-06-05 | 2015-06-17 | 天津大学 | Application of double-TIG welding method to implementation of thick plate welding |
-
1986
- 1986-02-04 JP JP2275386A patent/JPS62179872A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2690861A1 (en) * | 1992-05-11 | 1993-11-12 | Electricite De France | Pickling metal surfaces by electric arc for mineral, radioactive and microbiological decontamination - comprises arranging surface to be treated as cathode in enclosure contg. non-oxidising gas, arranging anode facing surface, creating electric arc to obtain circular pickling zone |
| US5859402A (en) * | 1994-12-24 | 1999-01-12 | Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. | Process for the welding of work pieces with laser beams |
| JP2010125496A (en) * | 2008-11-28 | 2010-06-10 | Jfe Steel Corp | Tandem arc welding method |
| CN103273177A (en) * | 2013-06-05 | 2013-09-04 | 天津大学 | Double-TIG (tungsten inert gas) welding system for thick plates and welding method implemented by double-TIG welding system |
| CN104708179A (en) * | 2013-06-05 | 2015-06-17 | 天津大学 | Application of double-TIG welding method to implementation of thick plate welding |
| CN103273177B (en) * | 2013-06-05 | 2015-10-28 | 天津大学 | A kind of double T IG welding system for slab part and welding method thereof |
| CN104708179B (en) * | 2013-06-05 | 2016-09-14 | 天津大学 | The application in implementing thick plates of double TIG weld methods |
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