GB1336806A - Deep penetration welding using coherent optical radiation - Google Patents

Deep penetration welding using coherent optical radiation

Info

Publication number
GB1336806A
GB1336806A GB912972A GB912972A GB1336806A GB 1336806 A GB1336806 A GB 1336806A GB 912972 A GB912972 A GB 912972A GB 912972 A GB912972 A GB 912972A GB 1336806 A GB1336806 A GB 1336806A
Authority
GB
United Kingdom
Prior art keywords
workpiece
laser
void
power
mirror
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.)
Expired
Application number
GB912972A
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.)
Raytheon Technologies Corp
Original Assignee
United Aircraft Corp
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 United Aircraft Corp filed Critical United Aircraft Corp
Publication of GB1336806A publication Critical patent/GB1336806A/en
Expired legal-status Critical Current

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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
    • B23K26/0643—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising mirrors
    • 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
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/0665—Shaping the laser beam, e.g. by masks or multi-focusing by beam condensation on the workpiece, e.g. for focusing
    • 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
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/1462—Nozzles; Features related to nozzles
    • B23K26/1464—Supply to, or discharge from, nozzles of media, e.g. gas, powder, wire
    • B23K26/147—Features outside the nozzle for feeding the fluid stream towards the workpiece

Landscapes

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

Abstract

1336806 Welding by fusion UNITED AIRCRAFT CORP 28 Feb 1972 [8 March 1971] 9129/72 Heading B3R [Also in Division H1] In order to effect deep penetration welding using a continuous wave beam of coherent optical radiation (e.g. a laser beam), workpiece surface reflectivity is reduced, and hence absorption is increased, by increasing surface temperature by setting the power density and power of the beam such that material at the point of beam impingement is vaporized faster than the heat is diffused from said point. By such arrangement, a void is formed, and to avoid creation of a hole the beam is removed or increased in travel speed prior to the expulsion of substantial material from the void. The step of beam removal consists of moving the beam relative to the workpiece so that the void translates through the material, solidification and welding occurring behind the beam. The beam is preferably moved relative to the workpiece at a speed of at least 10 focused spot diameters in the time required for hole creation. The beam is preferably one working in the TEM 00 mode with an output of at least 3 kW. and with the beam focused to provide a power density between 10<SP>6</SP> and 10<SP>8</SP> watts/inch.<SP>2</SP>. Beam focal distance/aperture is preferably greater than 4. It may be necessary to increase beam power to initiate vaporization, and then to reduce power to prevent hole formation. Surface absorption may be increased artificially by a coating highly absorbent at the laser wavelength. The method of the invention may be applied to both butt and lap welds. As shown, a laser 10, such as a CO 2 laser at 10À6 microns wavelength, generates a TEM 00 beam 12 which is focused by a mirror 14 on to a workpiece 16 (e.g. two metallic pieces to be seam welded). The workpiece is mounted on a motor-movable table 18. Inert gas 22 may be supplied to prevent undesirable surface reactions. The mirror 14 may be of any suitable geometrical shape, e.g. spherical, elliptical, parabolic. Spherical aberration due to off-axis focusing with a spherical mirror may be minimized by restriction to less than 10 degrees off-axis angle or by using two mirrors curved and located so as to cancel aberration. Transmitting optics may replace the reflecting optics shown.
GB912972A 1971-03-08 1972-02-28 Deep penetration welding using coherent optical radiation Expired GB1336806A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12207071A 1971-03-08 1971-03-08

Publications (1)

Publication Number Publication Date
GB1336806A true GB1336806A (en) 1973-11-14

Family

ID=22400420

Family Applications (1)

Application Number Title Priority Date Filing Date
GB912972A Expired GB1336806A (en) 1971-03-08 1972-02-28 Deep penetration welding using coherent optical radiation

Country Status (4)

Country Link
DE (1) DE2211195A1 (en)
FR (1) FR2128872B1 (en)
GB (1) GB1336806A (en)
IT (1) IT949946B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2734759A1 (en) * 1976-08-03 1978-02-09 Boc Ltd LASER BEAM WELDING DEVICE
DE3332838A1 (en) * 1982-09-13 1984-03-15 John Alan Santa Rosa Calif. Macken METHOD AND DEVICE FOR ENGRAVING BY LASER BLASTING
US7693696B2 (en) 2005-06-10 2010-04-06 Chrysler Group Llc System and methodology for zero-gap welding
US8198565B2 (en) 2007-04-11 2012-06-12 Chrysler Group Llc Laser-welding apparatus and method
US8803029B2 (en) 2006-08-03 2014-08-12 Chrysler Group Llc Dual beam laser welding head
CN111051237A (en) * 2017-09-01 2020-04-21 汤姆逊许可公司 Adhesive-free adhesion to dielectric material layers using nanojet microstructures
US20210154772A1 (en) * 2019-11-22 2021-05-27 Medtronic, Inc. Laser cutting system
CN115740743A (en) * 2022-02-16 2023-03-07 周文龙 Prevent laser welding equipment of gas pocket defect

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4270496A (en) * 1978-12-26 1981-06-02 Eaton Corporation Welded article and method of making same
CN112222618A (en) * 2020-09-28 2021-01-15 上海飞博激光科技有限公司 Laser welding method capable of reducing welding explosion points

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2734759A1 (en) * 1976-08-03 1978-02-09 Boc Ltd LASER BEAM WELDING DEVICE
DE3332838A1 (en) * 1982-09-13 1984-03-15 John Alan Santa Rosa Calif. Macken METHOD AND DEVICE FOR ENGRAVING BY LASER BLASTING
US7693696B2 (en) 2005-06-10 2010-04-06 Chrysler Group Llc System and methodology for zero-gap welding
US8253062B2 (en) 2005-06-10 2012-08-28 Chrysler Group Llc System and methodology for zero-gap welding
US8803029B2 (en) 2006-08-03 2014-08-12 Chrysler Group Llc Dual beam laser welding head
US8198565B2 (en) 2007-04-11 2012-06-12 Chrysler Group Llc Laser-welding apparatus and method
CN111051237A (en) * 2017-09-01 2020-04-21 汤姆逊许可公司 Adhesive-free adhesion to dielectric material layers using nanojet microstructures
CN111051237B (en) * 2017-09-01 2023-04-18 汤姆逊许可公司 Adhesive-free adhesion to dielectric material layers using nanojet microstructures
US20210154772A1 (en) * 2019-11-22 2021-05-27 Medtronic, Inc. Laser cutting system
US11999014B2 (en) * 2019-11-22 2024-06-04 Medtronic, Inc. Laser cutting system
CN115740743A (en) * 2022-02-16 2023-03-07 周文龙 Prevent laser welding equipment of gas pocket defect

Also Published As

Publication number Publication date
DE2211195A1 (en) 1972-10-05
IT949946B (en) 1973-06-11
FR2128872A1 (en) 1972-10-20
FR2128872B1 (en) 1976-10-29

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)

Free format text: INPADOC CORRECTION: JOURNAL 4438, PAGE 660 FOR 133806 READ 1336806

414C Case decided by the comptroller ** grants refused (sect. 14/1949)
CSNS Application of which complete specification have been accepted and published, but patent is not sealed