WO2003022512A1 - Procede de soudage hybride laser-arc avec ajustage des debits de gaz - Google Patents
Procede de soudage hybride laser-arc avec ajustage des debits de gaz Download PDFInfo
- Publication number
- WO2003022512A1 WO2003022512A1 PCT/FR2002/002719 FR0202719W WO03022512A1 WO 2003022512 A1 WO2003022512 A1 WO 2003022512A1 FR 0202719 W FR0202719 W FR 0202719W WO 03022512 A1 WO03022512 A1 WO 03022512A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- welded
- arc
- welding
- volume
- 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.)
- Ceased
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
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
- B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/18—Sheet panels
- B23K2101/185—Tailored blanks
Definitions
- the present invention relates to a hybrid welding method and installation combining a laser beam and an electric arc, in particular a plasma arc, using particular gases or gas mixtures as starting gas for the electric arc and assistance of the laser beam, and its application to the welding of tubes or flanks butted (tailored blan s), in particular usable in the automobile industry.
- the arc is preferably struck in a gas with low ionization potential which must, moreover, be neutral so as not to cause contamination or deterioration of the electrode or react well negatively with the molten metal.
- argon meets these conditions because it is neutral and has a relatively low ionization potential, unlike nitrogen or C0 2 which, although having ionization potentials even weaker, can react with the molten metal with, for example, the formation of nitrides for nitrogen and deterioration of the tungsten electrode for C0 2 .
- the production of the weld is based on localized melting phenomena of the matter at the point of impact of the laser beam where a capillary is formed filled with metallic vapors ionized at high temperature, called keyhole (keyhole).
- keyhole metallic vapors ionized at high temperature
- This capillary has an important role as it allows to transfer the ener gy directly to the heart of the material.
- the molten bath thus formed and maintained is gradually moved between the parts to be assembled, as a function of the relative displacement of the laser beam relative to the parts to be welded, and the metal of the weld joint solidifies, after the passage of the laser beam, in ensuring the joint assembly of the parts.
- the appearance of the capillary is accompanied by the formation of a plasma of metallic vapors, that is to say of an ionized gaseous medium, electrically neutral and at a temperature of several thousand degrees.
- the metal vapor plasma results from a good coupling between the laser beam and the part, and it is therefore inevitable. This type of plasma absorbs a small amount of incident energy and does not cause a significant change in the width and depth of the weld bead.
- the metal vapor plasma transfers part of its energy to the shielding gas used to protect the welding area from contamination of it. ci by atmospheric impurities, and there is then a risk of the formation of another plasma from the shielding gas.
- the creation of such a plasma of the shielding gas can absorb the energy of the incident Jaser beam and, in this case, the weld bead becomes wider on the surface and penetrates much less in the thickness of the parts to be welded.
- a gas with high ionization potential it is necessary to use a gas with high ionization potential and it turns out that helium is the most suitable gas to limit the appearance of this type of plasma.
- hybrid arc-laser welding In recent years, in parallel with the above-mentioned welding processes, a welding process called hybrid arc-laser welding has been developed based on a combination of a laser beam and an electric arc.
- Hybrid arc and laser welding methods have been described in particular in documents EP-A-793558 EP-A-782489; EP-A-800434; US-A-5,006,688; US-A-5,700,989; EP-A-844042; Laser GTA'Weiding of aluminum alloy 5052, TP Diebold and CE Albright, 1984, p. 18-24; SU-A-1815085, US-A-4,689,466; Plasma arc augmented laser welding, RP Walduck and J. Biffin, p.172-176, 1994; or ⁇ G or MIG arc augmented laser welding of thick mild steel plate, Joining and Materials, by J Matsuda et al., p. 31-34, 1988.
- a hybrid plasma-laser welding process is a combined or mixed welding process which associates electric arc welding with a laser beam.
- the arc-laser method consists in generating an electric arc between an electrode, fuse or non-fuse, and the part to be welded, and in focusing a power laser beam, in particular a laser of type YAG or of type C0 2 , in the area arc, that is to say at the level or in the joint plane obtained by joining edge-to-edge of the parts to be welded together.
- Such a hybrid process makes it possible to considerably improve the welding speeds compared to laser welding alone or to arc or plasma welding alone, and also makes it possible to significantly increase the tolerances for positioning the edges before welding as well. that the play tolerated between the edges to be welded, in particular with respect to welding by laser beam alone which requires a high precision of positioning of the parts to be welded because of the small size of the focal point of the laser beam.
- Hybrid arc-laser processes are known to be perfectly suited for welding tailored blanks for the automotive industry, as they allow a well-welded bead free from gutters, as mentioned EP-A-782489 or Laser plus arc equals power, Industrial Laser Solutions, February 1999, p.28-30.
- an assist gas to assist the laser beam and protect the welding area from external aggressions and a gas for the electric arc, in particular a plasma gas used to create the arc plasma jet in the case of an arc-plasma process.
- the plasma gas must contain essentially argon to allow effective arc striking.
- a plasma gas rich in argon can be easily ionized and lead to the formation of an absorbent plasma for the laser beam and therefore harmful for the quality of the weld because it reduces the depth of penetration of the beam, conversely, the shielding gas of the weld pool must mainly contain helium to avoid the formation of an absorbent plasma.
- the object of the present invention is therefore to propose a hybrid arc-laser welding process which does not pose these problems, that is to say a hybrid arc-laser welding process, in particular plasma-laser arc, with effective ignition. and absence or near absence of formation of absorbent plasma.
- the solution of the invention is then a hybrid arc-laser welding process of one or more metal parts to be welded by making at least one weld joint between edges to be welded carried by the said metal part or parts, said joint of welding being obtained by implementing at least one laser beam and at least one electric arc combining with one another so as to obtain a fusion then a subsequent solidification of the metal along said edges to be welded , in which the procedure is as follows: (a) ignition of at least one pilot arc between an electrode and a nozzle of a hybrid welding head, said electrode supplied with electric current and being brought into contact with a first gas introduced in said hybrid welding head, said first gas having a gaseous composition capable of promoting the ignition of the pilot arc, (b) subsequent transfer in step (a) of the pilot arc thus initiated towards the edges of the said piece or pieces to be welded,
- the method of the invention may include one or more of the following technical characteristics:
- the first gas forming the priming gas composition contains more than 50% by volume of argon, preferably from 70 to 100% by volume of argon.
- the first gas forming the gaseous initiation composition contains, moreover, at least one additional non-oxidizing compound chosen from helium, H 2 , and N 2 in a content of 0.05 to 30 % in volume.
- the second gas contains at least 40% by volume of helium, preferably from 50 to 100% by volume of helium.
- the second gas also contains at least one additive compound chosen from argon, H 2 , 0 2 , C0 2 and N 2 in a content of 0.05 to 30% by volume.
- the volume flow of the first gas (Ql) and the volume flow of the second gas (Q2) are adjusted such that: 2 ⁇ Q2 / Ql ⁇ 55. - the volume flow of the first gas (Ql) and the volume flow of the second gas
- (Q2) are adjusted such that: 3 ⁇ Q2 / Ql ⁇ 50, preferably 10 ⁇ Q2 / Ql ⁇ 40.
- step (c) the laser beam and the plasma arc are delivered, by being combined together, through the same orifice of a welding nozzle.
- the gaseous protective atmosphere formed by a mixture of the first gas and the second gas obtained in step (c) contains helium and argon, the proportion by volume of helium being greater than the proportion by volume argon.
- the parts to be welded have a thickness between 0.1 and 70 mm, preferably between 0.3 and 50 mm.
- the part or parts to be welded are made of a metal or a metal alloy chosen from coated or uncoated steels, in particular joining steels, steels with high yield strength, carbon steels, steels with a zinc alloy layer on the surface, stainless steels, aluminum or aluminum alloys.
- the protective gaseous atmosphere contains argon and more than 60% of helium and optionally one or more compounds chosen from Hz, 0 2 , C0 2 and N 2 .
- step (b) the adjustment of the respective volume flow rates of said first and second gases is carried out during the transfer of step (b) or immediately after transfer of the pilot arc, preferably after the transfer of the pilot arc
- the part to be welded is welded so as to obtain a tube.
- the approximation of the welding head of the piece or pieces to be welded so as to create a plasma arc is effected after detection of a pilot arc, preferably said approximation is effected almost simultaneously with the sending of the atmosphere protective gas containing at least 50% by volume of helium in step (c).
- the laser beam is emitted simultaneously or subsequently to the formation of the plasma arc so that said beam combines with the arc plasma.
- the invention also relates to a method for manufacturing automobile body elements, in which parts forming elements of an automobile body are welded together by implementing a hybrid welding method according to the invention, as well as a method of manufacturing a welded tube, longitudinally or in a spiral, in which the edges of the tube are welded together by implementing a hybrid welding method according to the invention.
- the gas mixture containing said first and second gas contains a proportion of the first gas such that a gaseous plasma from this gas is not formed in contact with the plasma of metallic vapors.
- the invention is illustrated in the appended figure in which a part of a hybrid welding installation according to the invention is seen, usually comprising a gas laser oscillator (type C0 2 laser) producing a coherent high energy monochromatic beam 3. , an optical path equipped with reflecting mirrors making it possible to bring the laser beam 3 to a welding head situated opposite the tube to be welded.
- a gas laser oscillator type C0 2 laser
- the welding head conventionally comprises a lens or one or more focusing mirrors so as to focus the laser beam 3 at one or more focusing points in the thickness of the parts 10, 11 to be welded and at the joint plane 9 obtained by joining, edge-to-edge, lap or in another configuration, the edges of the parts to be assembled.
- an arc plasma jet is obtained by means of an electrode 1 and a plasma gas 4.
- the laser beam 3 and the plasma jet combine in the welding head so as to be expelled together through the single orifice of the nozzle 2 so as to locally concentrate enough power density to melt the edges of the parts to be welded.
- This gaseous ignition composition originating from the source 4, is introduced into the welding head in the immediate vicinity and / or around the electrode 1 so as to effectively strike the pilot arc between said non-fusible electrode 1 and the nozzle 2. Then, when this pilot arc is struck, it is transferred to the parts to be welded together by being expelled through the single nozzle orifice 2 of the welding head.
- the second gas is formed from pure helium or a gaseous mixture based on helium, which preferably contains from 50 to 100% by volume of helium, the remainder being argon, hydrogen, nitrogen, carbon dioxide, oxygen or any other suitable gas or gas mixture.
- the invention in order to obtain efficient welding, that is to say that no harmful plasma is formed from the shielding gas in contact with the metal vapor plasma and therefore that no no adsorption of a large part of the laser beam 3, it is essential to control, adjust, regulate or choose the volume flow rate of the first gas (Ql with Ql not zero) and the volume flow rate of the second gas (Q2) so that we obtain a flow rate of the second gas significantly higher than that of the first gas (Q2> Q1).
- the gas flow is managed by means of a conventional control box 6 so that, until a correct ignition is obtained, there is a supply of the welding head with plasma gas (4 ), while once the pilot electric arc has been detected by the control box 6, the latter controls a solenoid valve (not shown) which opens so as to deliver the shielding gas (5) to increase, for example , the helium content in the head so as to pass from a gaseous atmosphere containing mainly argon used to strike the pilot arc to a gaseous atmosphere containing mainly helium usable for welding.
- the priming cycle is for example the following: - Opening of the valve (not shown) controlling the arrival of the plasma gas 4 around the electrode, for example a flow rate of approximately 5 l / min of argon.
- a low amperage current is delivered between the electrode and the nozzle so as to generate a pilot arc and, when the pilot arc is detected, the welding head is brought closer to the parts to be welded so as to create the plasma of arc which is sent to the edges to be welded
- a protective gas for example helium
- the invention is applicable in particular to the welding of tubes, in axial or helical welding, or in butted flanks intended to constitute at least part of a vehicle body element.
- the invention can be used to assemble by hybrid welding metal parts having equal or different thicknesses, and / or metallurgical compositions or identical or different metallurgical grades, and / or equal or different thicknesses.
- the weld joint is often characterized by a difference in level between the upper planes of each of the parts to be welded, thus leading to the generation of a "step", but it is possible to also experience the opposite, namely the flanks type seals the tailored whose upper planes are aligned but the lower planes are not of the same level and where v market is located at the back of the weld joint.
- the part or parts to be welded and the welding head are driven in a movement of movement relative to one another, that is to say either the part or parts are fixed and the welding head moves, the reverse.
- the welding phase can be done in one or more passes, in particular according to the diameter and the thickness to be welded.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP02774857A EP1427564A1 (fr) | 2001-09-13 | 2002-07-29 | Procede de soudage hybride laser-arc avec ajustage des debits de gaz |
| JP2003526628A JP2005501737A (ja) | 2001-09-13 | 2002-07-29 | ガス流量調節を伴うハイブリッドレーザー−アーク溶接方法 |
| US10/489,444 US20050011868A1 (en) | 2001-09-13 | 2002-07-29 | Hybrid laser-arc welding method with gas flow rate adjustment |
| CA002460094A CA2460094A1 (fr) | 2001-09-13 | 2002-07-29 | Procede de soudage hybride laser-arc avec ajustage des debits de gaz |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0111854A FR2829414B1 (fr) | 2001-09-13 | 2001-09-13 | Procede de soudage hybride laser-arc avec ajustage des debits de gaz |
| FR01/11854 | 2001-09-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003022512A1 true WO2003022512A1 (fr) | 2003-03-20 |
Family
ID=8867250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2002/002719 Ceased WO2003022512A1 (fr) | 2001-09-13 | 2002-07-29 | Procede de soudage hybride laser-arc avec ajustage des debits de gaz |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20050011868A1 (fr) |
| EP (1) | EP1427564A1 (fr) |
| JP (1) | JP2005501737A (fr) |
| CA (1) | CA2460094A1 (fr) |
| FR (1) | FR2829414B1 (fr) |
| WO (1) | WO2003022512A1 (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1674190A1 (fr) * | 2004-12-21 | 2006-06-28 | Linde Aktiengesellschaft | Méthode de soudage ou de brasage au laser de l'aluminium et de ses alliages |
| CN103862172A (zh) * | 2012-12-18 | 2014-06-18 | 宁波宝新不锈钢有限公司 | 一种不锈钢激光焊管内焊缝气体保护装置 |
| CN108747066A (zh) * | 2018-06-11 | 2018-11-06 | 上海通用建筑工程有限公司 | 一种箱型杆件的制造焊接方法 |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10062564A1 (de) * | 2000-12-15 | 2002-06-20 | Linde Ag | Schutzgas und Verfahren zum Lichtbogenschweißen |
| US7154065B2 (en) * | 2002-05-24 | 2006-12-26 | Alcon Inc. | Laser-hybrid welding with beam oscillation |
| US20060255019A1 (en) * | 2002-05-24 | 2006-11-16 | Martukanitz Richard P | Apparatus and methods for conducting laser stir welding |
| FR2864917A1 (fr) * | 2004-01-14 | 2005-07-15 | Air Liquide | Procede de soudage hybride laser-arc d'aluminium |
| FR2903623B1 (fr) * | 2006-07-12 | 2008-09-19 | L'air Liquide | Procede de soudage hybride laser-arc de pieces metalliques aluminiees |
| JP5278426B2 (ja) * | 2008-08-19 | 2013-09-04 | パナソニック株式会社 | 複合溶接方法および複合溶接装置 |
| FR2936177B1 (fr) * | 2008-09-24 | 2011-08-26 | Air Liquide | Procede de soudage laser de type co2 avec buse a jet dynamique. |
| US20100078412A1 (en) * | 2008-09-30 | 2010-04-01 | Caterpillar Inc. | Hybrid welding method |
| DE102009020146B3 (de) * | 2009-04-08 | 2010-06-10 | V & M Deutschland Gmbh | Verfahren und Vorrichtung zum Verbinden der Enden von Rohren aus Stahl mittels Orbitalschweißen in Hybridtechnik |
| WO2011029462A1 (fr) * | 2009-09-14 | 2011-03-17 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Procédé et dispositif de traitement de pièces présentant un dispositif laser et un dispositif à arc électrique |
| WO2011072734A1 (fr) * | 2009-12-16 | 2011-06-23 | Esab Ab | Procédé et agencement de soudage |
| FR2962674B1 (fr) * | 2010-07-13 | 2013-03-08 | Air Liquide | Procede de soudage hybride arc/laser de pieces en acier aluminise |
| FR2962671B1 (fr) * | 2010-07-13 | 2013-03-08 | Air Liquide | Procede de soudage a l'arc et gaz inertes de pieces metalliques aluminiees |
| FR2962673B1 (fr) | 2010-07-13 | 2013-03-08 | Air Liquide | Procede de soudage hybride arc/laser de pieces en acier aluminise avec fil a elements gamagenes |
| US8546720B2 (en) | 2011-04-13 | 2013-10-01 | General Electric Company | Hybrid welding apparatus and system and method of welding |
| US20130309000A1 (en) * | 2012-05-21 | 2013-11-21 | General Electric Comapny | Hybrid laser arc welding process and apparatus |
| US8890030B2 (en) | 2012-08-30 | 2014-11-18 | General Electric Company | Hybrid welding apparatuses, systems and methods |
| DE102012111118B3 (de) | 2012-11-19 | 2014-04-03 | Wisco Tailored Blanks Gmbh | Verfahren zum Laserschweißen eines oder mehrerer Werkstücke aus härtbarem Stahl im Stumpfstoß |
| US9790090B2 (en) * | 2013-02-13 | 2017-10-17 | Lawrence Livermore National Security, Llc | Laser-induced gas plasma machining |
| US10328513B2 (en) | 2013-05-31 | 2019-06-25 | General Electric Company | Welding process, welding system, and welded article |
| CN103612018B (zh) * | 2013-11-12 | 2015-11-18 | 北京工业大学 | 一种激光—旁路电弧复合焊接方法 |
| US10981248B2 (en) | 2013-11-22 | 2021-04-20 | General Electric Company | Hybrid welding apparatuses, systems and methods for spatially offset components |
| JP6740299B2 (ja) * | 2018-08-24 | 2020-08-12 | ファナック株式会社 | 加工条件調整装置及び機械学習装置 |
| US20210031297A1 (en) * | 2019-08-01 | 2021-02-04 | GM Global Technology Operations LLC | System and method for multi-task laser welding |
| CN112589274A (zh) * | 2020-12-24 | 2021-04-02 | 广东省科学院中乌焊接研究所 | 一种激光-等离子弧复合切割与焊接加工装置及加工方法 |
| CN113560733B (zh) * | 2021-09-07 | 2022-04-08 | 广东省科学院中乌焊接研究所 | 激光-等离子复合切割方法和装置 |
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| DE2813642A1 (de) * | 1978-03-30 | 1979-10-04 | Nat Res Dev | Verfahren und vorrichtung zur bearbeitung von werkstuecken mittels eines laserstrahls |
| DE19500512A1 (de) * | 1994-09-23 | 1996-04-11 | Fraunhofer Ges Forschung | Verfahren zum Verschweißen von Werkstücken |
| US5866870A (en) * | 1994-11-24 | 1999-02-02 | Coventry University | Enhanced laser beam welding |
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| JPS60216989A (ja) * | 1984-04-10 | 1985-10-30 | Mitsubishi Electric Corp | レ−ザビ−ム加工装置 |
| US5006688A (en) * | 1988-10-24 | 1991-04-09 | Westinghouse Electric Corp. | Laser-arc apparatus and method for controlling plasma cloud |
| ES2114327T3 (es) * | 1994-09-23 | 1998-05-16 | Fraunhofer Ges Forschung | Procedimiento para soldar piezas a trabajar. |
| US5700989A (en) * | 1994-12-30 | 1997-12-23 | Dykhno; Igor S. | Combined laser and plasma arc welding torch |
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| JP3392683B2 (ja) * | 1997-02-10 | 2003-03-31 | 三菱重工業株式会社 | レーザ加工ヘッド |
| US6388227B1 (en) * | 1999-07-15 | 2002-05-14 | Plasma Laser Technologies Ltd. | Combined laser and plasma-arc processing torch and method |
| DE19944466A1 (de) * | 1999-09-16 | 2001-03-22 | Linde Gas Ag | Verfahren und Vorrichtung zum Schutzgas-Hybridschweißen |
| FR2809648B1 (fr) * | 2000-05-31 | 2002-08-30 | Air Liquide | Procede et installation de soudage hybride par laser et arc electrique, notamment de pieces automobiles ou de tubes |
-
2001
- 2001-09-13 FR FR0111854A patent/FR2829414B1/fr not_active Expired - Fee Related
-
2002
- 2002-07-29 CA CA002460094A patent/CA2460094A1/fr not_active Abandoned
- 2002-07-29 JP JP2003526628A patent/JP2005501737A/ja not_active Withdrawn
- 2002-07-29 WO PCT/FR2002/002719 patent/WO2003022512A1/fr not_active Ceased
- 2002-07-29 EP EP02774857A patent/EP1427564A1/fr not_active Withdrawn
- 2002-07-29 US US10/489,444 patent/US20050011868A1/en not_active Abandoned
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2813642A1 (de) * | 1978-03-30 | 1979-10-04 | Nat Res Dev | Verfahren und vorrichtung zur bearbeitung von werkstuecken mittels eines laserstrahls |
| DE19500512A1 (de) * | 1994-09-23 | 1996-04-11 | Fraunhofer Ges Forschung | Verfahren zum Verschweißen von Werkstücken |
| US5866870A (en) * | 1994-11-24 | 1999-02-02 | Coventry University | Enhanced laser beam welding |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1674190A1 (fr) * | 2004-12-21 | 2006-06-28 | Linde Aktiengesellschaft | Méthode de soudage ou de brasage au laser de l'aluminium et de ses alliages |
| CN103862172A (zh) * | 2012-12-18 | 2014-06-18 | 宁波宝新不锈钢有限公司 | 一种不锈钢激光焊管内焊缝气体保护装置 |
| CN108747066A (zh) * | 2018-06-11 | 2018-11-06 | 上海通用建筑工程有限公司 | 一种箱型杆件的制造焊接方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005501737A (ja) | 2005-01-20 |
| FR2829414B1 (fr) | 2003-10-31 |
| FR2829414A1 (fr) | 2003-03-14 |
| EP1427564A1 (fr) | 2004-06-16 |
| CA2460094A1 (fr) | 2003-03-20 |
| US20050011868A1 (en) | 2005-01-20 |
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