Method and apparatus for welding material by laser beam

Details Method and apparatus for welding material by laser beam Method and apparatus for welding material by laser beam

1993-10-22

1997-04-29

Hoang, Tu

Electric heating

Metal heating

By arc

21912174, B23K 2600, B23K 2606

Patent

active

056245858

ABSTRACT:
A laser beam having a circular cross section is irradiated obliquely with respect to a line vertical to a irradiating surface of material including a metal or by shaping the laser beam through an optical system of an irradiation unit, and then the laser beam having an elliptical shape is irradiated on the irradiating surface to thereby suppress weld defects such as weld cracks in weld joints of a difficult-to-weld material such as aluminum alloy.

REFERENCES:
patent: 3805015 (1974-04-01), Herziger et al.
patent: 3947093 (1976-03-01), Goshima et al.
patent: 4825035 (1989-04-01), Moriyasu et al.
patent: 4912297 (1990-03-01), Beyer et al.
Patent Abstracts of Japan vol. 014, No. 323 (M-0997) 11 Jul. 1990 & JP-A-02 108 486 (Teijin Seiki Co Ltd) 20 Apr. 1990.
Patent Abstracts of Japan vol. 014, No. 159 (M-0956) 28 Mar. 1990 & JP-A-02 020 681 (Fujitsu Ltd) 24 Jan. 1990.
Schweissen & Schneiden, vol. 44, No. 10, Oct. 1992, Dusseldorf, DE, pp. 553-559, XP000305087 G. Chen et al `Streckenenergie . . . Dauerbetrieb`.

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