Laser cutting and welding of sheet metal using a shield of compr

Details Laser cutting and welding of sheet metal using a shield of compr Laser cutting and welding of sheet metal using a shield of compr

1988-07-01

1990-02-27

Albritton, C. L.

Electric heating

Metal heating

By arc

21912172, B23K 2600

Patent

active

049053108

ABSTRACT:
A method of simultaneously cutting and welding metal, especially relatively thin sheets of metal, utilizing laser energy. The invention uses surface tension in the globule created at the site of the impingement of the laser beam on the work to form finished edges on both sides of the line of cut. A laser beam surrounded by a gaseous shield is used, the gas removing some of the molten metal but leaving sufficient to form the beads which comprise the finished edges on both sides of the cut. Using compressed air, as compared to an inert gas such as helium or argon, as the shield gas produces a significant cost savings at the "price" of some reduction in quality due to oxidation.

REFERENCES:
patent: 4798931 (1989-01-01), Hess, III

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