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AssigneeL'Air Liquide Societe Anonyme a Directoire et Conseil de Surveillance pour l'Etude et L'Exploitatiion des Procedes Georges Claude
InventorsChristophe Bertez, Jean Hamy, Olivier Matile
Estimating the term…
Method and apparatus for cutting a workpiece made of structural steel or mild steel, i.e. alloy or non-alloy steels, by the use of a transparent or reflecting optical means for focusing a laser beam, and of an assist gas for said laser beam. The optical means is of the multifocus type and is chosen from lenses, mirrors and combinations thereof. The assist gas is nitrogen or a nitrogen/oxygen mixture. The method of the invention makes it possible to obtain a low or almost zero oxidation of the cut face and to do so while increasing the cutting performance by about 40% compared with a laser cutting method using nitrogen or a nitrogen/oxygen mixture.
A method of cutting a workpiece made of alloy or non-alloy steel by the use of at least one transparent or reflecting optical means for focusing at least one laser beam and of at least one assist gas for said laser beam, in which the optical means is of the multifocus type and the assist gas is nitrogen or a nitrogen/oxygen mixture containing at least 90% nitrogen.
An apparatus for cutting a workpiece made of alloy or non-alloy steel, comprising:
Dependencies are inferred from the claim text.