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JPS60121093A - Laser welding method - Google Patents

Laser welding method

Info

Publication number
JPS60121093A
JPS60121093A JP58230024A JP23002483A JPS60121093A JP S60121093 A JPS60121093 A JP S60121093A JP 58230024 A JP58230024 A JP 58230024A JP 23002483 A JP23002483 A JP 23002483A JP S60121093 A JPS60121093 A JP S60121093A
Authority
JP
Japan
Prior art keywords
welding
preheating
laser beam
weld line
laser
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
JP58230024A
Other languages
Japanese (ja)
Inventor
Ichiro Yamashita
一郎 山下
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 Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP58230024A priority Critical patent/JPS60121093A/en
Publication of JPS60121093A publication Critical patent/JPS60121093A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/067Dividing the beam into multiple beams, e.g. multifocusing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/60Preliminary treatment

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)

Abstract

PURPOSE:To improve productivity by preheating the part on a weld line by a preheating beam formed of a part of a laser beam for welding then executing welding. CONSTITUTION:A part of a laser beam 11 is taken out as a laser beam 12 for preheating by a semitransparent mirror 13 and is irradiated with a blurred focus F on the weld line of base metals 16 by using a mirror 14 and a lens 15. The beam 12 burns or evaporates stains 17 such as oil on the surface of the metals 16 and preheats the base metals. The beam 11 is focused F by a lens 18 onto the weld line of the base metals 16, by which welding on the weld line cleaned up and preheated by the preheating beam 12 is executed. The smoke, etc. 19 generated by the beam 12 is blown off by using an inert gas 21 from a nozzle 20. The welding is accomplished with less defects by the above-mentioned method. The number of stages is thus reduced and productivity is improved.

Description

【発明の詳細な説明】 本発明は、熱交換器、エアフィンクーラー、自動車板金
部品などに応用されるレーデ溶接方法に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a Rede welding method applied to heat exchangers, air fin coolers, automobile sheet metal parts, etc.

レーデ溶接法は、アーク溶接法などと異なp高エネルギ
ー密度を有している。このため、溶接による熱影響部や
熱変形が少なく、高速で高精度の溶接が可能である。ま
た、■開先継手で深溶込みの溶接ができるため、生産性
も高い。
The Rede welding method has a p-high energy density different from arc welding methods and the like. Therefore, the heat affected zone and thermal deformation caused by welding are small, and high-speed, high-precision welding is possible. In addition, productivity is high because deep penetration welding can be performed with groove joints.

従来のレーデ溶接方法を第1図に示す。この方法は母材
1(被溶接物)の溶接部を洗浄及び予熱した後、集光レ
ンズ2で集束されたレーザビーム3を母材1に照射して
溶接を行なう方法である。ここで図中4F!溶接シール
ド用アルゴンガス、5は溶接金楓である。
The conventional Rede welding method is shown in Fig. 1. In this method, after cleaning and preheating the welding part of the base material 1 (workpiece), the base material 1 is irradiated with a laser beam 3 focused by a condenser lens 2 to perform welding. Here is the 4th floor in the diagram! Argon gas for welding shield, 5 is welding metal maple.

しかしながら、この溶接方法は次のような欠点がある。However, this welding method has the following drawbacks.

即ち母材表面が油等で汚れている場合、溶接金属中和そ
れらの蒸気がトラップされ。
In other words, if the surface of the base metal is contaminated with oil or the like, the weld metal neutralizes the vapor and traps it.

プローホールなど溶接欠陥の原因となる。このため、従
来は溶接する前に母材表面を有機溶剤等で洗浄し、油等
の汚れを落とす必要があり。
This can cause welding defects such as plowholes. For this reason, conventionally, before welding, it is necessary to clean the base metal surface with an organic solvent or the like to remove oil and other stains.

また溶接部か複雑な形状をしている場合は洗浄・に手間
取るなど、レーザ溶接の特徴である高生産性が損われる
問題がある。更に中・高炭素鋼の溶接では割れが発生し
やすいため、母材の予熱処理などが施される。現在では
電気炉などによりこの処理が行なわれているが、生産性
を損っているばかりでなく、高精度が要求されている製
品では、この処理による熱変形、溶接割れが問題となる
。このため、高精度の溶接が可能なレーデ溶接法の特徴
が生かされない間軸がある。
In addition, if the welded part has a complicated shape, it takes time to clean it, which reduces the high productivity that is a characteristic of laser welding. Furthermore, since cracks are likely to occur when welding medium- and high-carbon steels, the base metal must be preheated. Currently, this process is carried out using electric furnaces, etc., but this not only impairs productivity, but also causes problems in products that require high precision, such as thermal deformation and weld cracking. For this reason, there are cases in which the features of the Rede welding method, which enables high-precision welding, are not fully utilized.

本発明は上記事情に鑑みてなされたもので。The present invention has been made in view of the above circumstances.

その目的とするところは、母相表面の洗浄を省略し、熱
変形、溶接割れを防止して、予熱及び溶接を1工程で行
うことにより生産性及び品質を向上することができるレ
ーザ溶接方法を得んとするものである。
The purpose is to develop a laser welding method that can omit cleaning of the matrix surface, prevent thermal deformation and weld cracking, and improve productivity and quality by performing preheating and welding in one step. It is something that you are trying to gain.

すなわち本発明は、溶接用レーザビームの一部を分岐し
て予熱用レーザビームを形成し、この予熱用レーザビー
ムを溶接前の溶接線上に照射して溶接線付近の汚れを燃
焼、蒸発させるとともに局部的な予熱を行ない、しかる
後上記溶接用レーザビームを用いて溶接施工することを
特徴とする。
That is, in the present invention, a part of the welding laser beam is branched to form a preheating laser beam, and this preheating laser beam is irradiated onto the weld line before welding to burn and evaporate dirt near the weld line. The method is characterized in that local preheating is performed and then welding is performed using the welding laser beam described above.

以下本発明方法を図示する実施例を参照して説明する。The method of the present invention will be explained below with reference to illustrative examples.

このレーデ溶接方法は、第2図に示すように溶接用レー
ザビーム11の+一部を予熱用レーデビーム12として
半透過813で取出し、これを全反射ミラー14及び集
光レンズ15を用いて母116の溶接直前の溶接線上に
焦点Fをほかじて照射する。この予熱用レーザビーム1
2は、母材16表面上にある油や水分等の汚れ17を燃
焼あるいは蒸発させて除去し、同時に局部的な予熱を行
なう。
In this Rade welding method, as shown in FIG. Irradiate the weld line just before welding with the focus F. This preheating laser beam 1
2 removes dirt 17 such as oil and water on the surface of the base material 16 by burning or evaporating it, and at the same time performs local preheating.

一1l接用レーデビーム1ノは、集光レーンズ18で集
束され、母材16の溶接線上に焦点Fを合わせて照射さ
れ、予熱用レーデビーム12で清浄化され予熱された溶
接線上を溶接施工する。
The contact radar beam 1 is focused by a condensing lane 18 and irradiated with a focus F on the welding line of the base material 16, and performs welding on the welding line that has been cleaned and preheated by the preheating radar beam 12.

この溶接方法によれば、金属表面上の汚れ17がレーザ
ビームを吸収しやすいので、予熱用レーデビームで効率
よく燃焼、蒸発させることができる。しかも溶接点は非
常に小さい(直径約0.1 mt )ので、予熱用レー
ザビーム12の焦点のばかしは小さくできる。したがっ
てエネルギー密度が大きくなり、このレーザビーム12
の/臂ワーをかなp小さくできる。また、光沢のある金
属表面ではレーザビームの反射率は大きいが、油膜等に
より吸収率は上シ、小パワーであっても予熱は可能であ
る。このため溶接用レーザビーム11のパワーは太きく
減少することはなく、溶は込み深さなどの溶接特性に大
きな貧化はない。
According to this welding method, since the dirt 17 on the metal surface easily absorbs the laser beam, it can be efficiently burned and evaporated by the preheating Rede beam. Moreover, since the welding point is very small (about 0.1 mt in diameter), the focus of the preheating laser beam 12 can be kept small. Therefore, the energy density increases, and this laser beam 12
The / armpit can be made smaller. Further, although the reflectance of the laser beam is high on a shiny metal surface, the absorption rate is high due to an oil film, etc., and preheating is possible even with a small power. Therefore, the power of the welding laser beam 11 does not decrease significantly, and there is no significant deterioration in welding characteristics such as penetration depth.

なお予熱用レーザビーム12の照射によって生じた油や
水などの煙や蒸気19などは、ノズル20よυ屋素ガス
等の不活性ガス2ノを用いて吹き飛ばすことにより、金
義表面に到達するレーザビーム7のパワーの減少を防ぎ
効果を増すことができる。なお図中22は溶接金属、2
3は溶接シールド用アルゴンガスを示す。
Incidentally, smoke and steam 19 such as oil and water generated by the irradiation of the preheating laser beam 12 are blown off using an inert gas such as yen gas through the nozzle 20 to reach the surface of the metal. It is possible to prevent a decrease in the power of the laser beam 7 and increase the effect. In addition, 22 in the figure is weld metal, 2
3 indicates argon gas for welding shield.

しかして本発明のレーザ溶接方法によれは次のような効
果がある。
However, the laser welding method of the present invention has the following effects.

即ち従来は、有機溶剤による金属表面の洗#、予熱、溶
接の3工程を必要としたが、この方法では同時に行うこ
とができるためl工程に減少し、生産性が向上する。ま
た有機溶剤を使用しないため、作業者の安全性が向上す
る。更に溶接@前に、しかも局部的な予熱が行なわれる
ため、熱変形がほとんどない。
That is, conventionally, three steps were required: cleaning the metal surface with an organic solvent, preheating, and welding, but with this method, these steps can be performed simultaneously, reducing the number of steps to one, improving productivity. Additionally, since no organic solvent is used, worker safety is improved. Furthermore, since local preheating is performed before welding, there is almost no thermal deformation.

次に本発明の具体的実施例につき説明する。Next, specific examples of the present invention will be described.

出力3KWのCO,レーザによる溶接を行う際、第2図
において約10%のレーザビームを反射する半透過鏡1
3により予熱用レーデビーム12を取り出し、これを母
材16の金属表面上に照射した。レーザ溶接によって生
ずるビード幅は約3順であるので、予熱用レーザビーム
12の金属表面上のスポットサイズは1両側l朋の余裕
をみて約5nとした。このビームの金属表面上の・母ワ
ー密度は約400 W/ crn” で、金属表面の油
などを燃焼、蒸発させるのに十分なパワー密度である。
When performing welding with a CO laser with an output of 3KW, a semi-transparent mirror 1 that reflects approximately 10% of the laser beam in Fig. 2
3, the preheating radar beam 12 was taken out and irradiated onto the metal surface of the base material 16. Since the bead width produced by laser welding is about 3 mm, the spot size of the preheating laser beam 12 on the metal surface was set to about 5 nm, taking into account a margin of 1 on both sides. The power density of this beam on the metal surface is approximately 400 W/crn'', which is sufficient power density to burn and vaporize oil on the metal surface.

また、このエネルギーの一部は母材余興にも吸収され、
局部的な予熱効果が得られた。予熱用レーデビーム12
の照射によって生ずる油等の蒸気19は窒素ガスで吹き
飛はし、金執表面に到達するエネルギー量を減少させな
いようにして、油膜のある金属の溶接を行ったところ、
ブローホール、溶接割れ等はなく良好な溶接結果が得ら
れた。なお、従来の第1図に示すレーザ溶接方法でこの
金属の表面を洗浄することなくレーザ浴接を行った結果
、第3図のように浴接金属中にブローホール24の溶接
欠陥が多数みられた。このことから本発明によるレーザ
溶接方法は^能率(3工根が1工程になる)高品質(溶
接欠陥なし)レーザ溶接方法であることが確認された。
In addition, some of this energy is also absorbed by the base material entertainment,
A local preheating effect was obtained. Preheating radar beam 12
The oil vapor 19 generated by the irradiation was blown away with nitrogen gas, and metals with an oil film were welded without reducing the amount of energy reaching the surface of the metal.
Good welding results were obtained with no blowholes or weld cracks. In addition, as a result of performing laser bath welding without cleaning the surface of this metal using the conventional laser welding method shown in FIG. It was done. From this, it was confirmed that the laser welding method according to the present invention is an efficient (three welds become one process) high quality (no welding defects) laser welding method.

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

第1図は従来のレーデ浴接方法の説明図、第2図は本発
明の一実施例を示すレーザ浴接方法の説明図、第3図は
比較例におけるレーザ溶接結果を示す説明図である。 1ノ・・・溶接用レーザビーム、12・・・予熱用レー
デビーム、13・・・半透過鏡、14・・・全反射ミラ
ー、15・・・集光レンズ、16・・・母材、17・・
・汚れ、18・・・集光レンズ、19・・・蒸気、20
・・・ノズル、21・・・不活性ガス、22・・・溶接
余興。 23・・・溶接シールド用アルゴンガス、24・・・ブ
ローポール。 出願人惺代理人 弁理士 鈴 江 武 彦オl 図
Fig. 1 is an explanatory diagram of a conventional Lede bath welding method, Fig. 2 is an explanatory diagram of a laser bath welding method showing an embodiment of the present invention, and Fig. 3 is an explanatory diagram showing laser welding results in a comparative example. . 1 No... Laser beam for welding, 12... Radhe beam for preheating, 13... Semi-transmissive mirror, 14... Total reflection mirror, 15... Condensing lens, 16... Base material, 17・・・
- Dirt, 18... Condensing lens, 19... Steam, 20
...Nozzle, 21...Inert gas, 22...Welding entertainment. 23...Argon gas for welding shield, 24...Blow pole. Applicant's agent Patent attorney Takehiko Suzue Figure

Claims (1)

【特許請求の範囲】[Claims] 溶接用レーザビームの一部を分岐して予熱用L/−fヒ
ームを形成し、この予熱用レーデビームを溶接前の溶接
線上に照射して予熱した後止0ピ溶接用レーザビームを
用いて溶接施工することを特徴とするレーデ溶接方法。
A part of the welding laser beam is branched to form a preheating L/-f beam, and this preheating radar beam is irradiated onto the welding line before welding to preheat the welding line. Welding is performed using the preheated trailing zero pin welding laser beam. Rede welding method characterized by construction.
JP58230024A 1983-12-06 1983-12-06 Laser welding method Pending JPS60121093A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58230024A JPS60121093A (en) 1983-12-06 1983-12-06 Laser welding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58230024A JPS60121093A (en) 1983-12-06 1983-12-06 Laser welding method

Publications (1)

Publication Number Publication Date
JPS60121093A true JPS60121093A (en) 1985-06-28

Family

ID=16901370

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58230024A Pending JPS60121093A (en) 1983-12-06 1983-12-06 Laser welding method

Country Status (1)

Country Link
JP (1) JPS60121093A (en)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0331794A2 (en) * 1988-03-08 1989-09-13 Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung Machining equipment for work pieces
FR2637210A1 (en) * 1988-09-30 1990-04-06 Thomson Hybrides Microondes LASER BEAM WELDING METHOD OF TWO METAL PARTS, AND ELECTRONIC BOX WELDED BY THIS METHOD
WO1990003865A1 (en) * 1988-10-15 1990-04-19 National Research Development Corporation Welding of coated metals
JPH02295686A (en) * 1989-05-08 1990-12-06 Amada Co Ltd Laser beam welding method and laser beam machining head used for the method
WO1992011971A1 (en) * 1990-12-28 1992-07-23 Fanuc Ltd Method and device for laser welding of galvanized steel sheets
FR2729592A1 (en) * 1995-01-24 1996-07-26 Alcatel Kabel Ag METHOD FOR MANUFACTURING LONGITUDINAL WELDED METAL PIPES
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
KR20010086691A (en) * 2000-03-02 2001-09-15 추후제출 laser cutting method and apparatus
WO2001068309A1 (en) * 2000-03-15 2001-09-20 Eduard Borisovich Gusev Material laser processing
WO2002087816A3 (en) * 2001-04-27 2003-03-06 Honda Motor Co Ltd Method and appratus for laser beam welding of overlapping sheets
EP1331058A1 (en) * 2002-01-26 2003-07-30 ThyssenKrupp Stahl AG Method and Device for producing a welding or soldering seam with a laser
WO2005107996A3 (en) * 2004-05-10 2006-02-16 Fronius Int Gmbh Laser hybrid welding method and laser hybrid welding torch using a zinc and/or carbon and/or aluminum-containing rod
DE102004052142A1 (en) * 2004-10-22 2006-05-11 Rolls-Royce Deutschland Ltd & Co Kg Laser welding process especially for compressor blades for a gas turbine cleans weld region with defocused beam before welding with the same beam that is focused
US7094988B1 (en) * 2005-04-18 2006-08-22 Honeywell International, Inc. Laser welding heat treat process
US7617605B2 (en) 2005-06-16 2009-11-17 Continental Automotive Systems Us, Inc. Component geometry and method for blowout resistant welds
KR100956026B1 (en) 2007-11-22 2010-05-06 주식회사 성우하이텍 Laser welding method for galvanized steel sheet
EP2186594A1 (en) * 2008-11-12 2010-05-19 Siemens Aktiengesellschaft Method of and device for pre-heating during welding using a second laser beam
US7930825B2 (en) 2005-06-16 2011-04-26 Continental Automotive Systems Us, Inc. Blowout resistant weld method for laser welds for press-fit parts
JP2013052445A (en) * 2012-12-10 2013-03-21 Japan Transport Engineering Co Laser welding method
US8803029B2 (en) * 2006-08-03 2014-08-12 Chrysler Group Llc Dual beam laser welding head
US20150069025A1 (en) * 2013-09-10 2015-03-12 Caterpillar, Inc. Machine component cladding strategy
JP2015205327A (en) * 2014-04-22 2015-11-19 パナソニックIpマネジメント株式会社 Laser welding method and laser welding equipment
DE102016218938A1 (en) * 2016-09-29 2018-04-12 Volkswagen Aktiengesellschaft Joining device and joining method
JP2020523201A (en) * 2018-03-30 2020-08-06 重慶聯豪科技有限公司Chongqing Lianhao Technology Co.,Ltd. Welding process of differential assembly

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0331794A2 (en) * 1988-03-08 1989-09-13 Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung Machining equipment for work pieces
FR2637210A1 (en) * 1988-09-30 1990-04-06 Thomson Hybrides Microondes LASER BEAM WELDING METHOD OF TWO METAL PARTS, AND ELECTRONIC BOX WELDED BY THIS METHOD
WO1990003865A1 (en) * 1988-10-15 1990-04-19 National Research Development Corporation Welding of coated metals
US5216220A (en) * 1988-10-15 1993-06-01 British Technology Group Ltd. Welding of coated metals
JPH02295686A (en) * 1989-05-08 1990-12-06 Amada Co Ltd Laser beam welding method and laser beam machining head used for the method
WO1992011971A1 (en) * 1990-12-28 1992-07-23 Fanuc Ltd Method and device for laser welding of galvanized steel sheets
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
US5658473A (en) * 1995-01-24 1997-08-19 Alcatel Kabel Ag & Co Method for producing lengthwise welded metal tubes
FR2729592A1 (en) * 1995-01-24 1996-07-26 Alcatel Kabel Ag METHOD FOR MANUFACTURING LONGITUDINAL WELDED METAL PIPES
KR20010086691A (en) * 2000-03-02 2001-09-15 추후제출 laser cutting method and apparatus
WO2001068309A1 (en) * 2000-03-15 2001-09-20 Eduard Borisovich Gusev Material laser processing
WO2002087816A3 (en) * 2001-04-27 2003-03-06 Honda Motor Co Ltd Method and appratus for laser beam welding of overlapping sheets
GB2389552A (en) * 2001-04-27 2003-12-17 Honda Motor Co Ltd Method and apparatus for laser beam welding of overlapping sheets
GB2389552B (en) * 2001-04-27 2005-02-02 Honda Motor Co Ltd Laser beam welding method and apparatus
US7385157B2 (en) 2001-04-27 2008-06-10 Honda Giken Kogyo Kabushiki Kaisha Laser beam welding method and apparatus
EP1331058A1 (en) * 2002-01-26 2003-07-30 ThyssenKrupp Stahl AG Method and Device for producing a welding or soldering seam with a laser
AT501822A1 (en) * 2004-05-10 2006-11-15 Fronius Int Gmbh METHOD FOR STARTING A LASER HYBRID WELDING PROCESS
AT501822B1 (en) * 2004-05-10 2007-01-15 Fronius Int Gmbh Two-stage hybrid process to weld sheet metal work-pieces
EP1800790A1 (en) * 2004-05-10 2007-06-27 Fronius International GmbH Process of starting a hybrid laser welding process for welding of coated metal sheets with a backward and forward motion of the laser beam for evaporating the coating
WO2005107996A3 (en) * 2004-05-10 2006-02-16 Fronius Int Gmbh Laser hybrid welding method and laser hybrid welding torch using a zinc and/or carbon and/or aluminum-containing rod
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