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Title:
METHOD AND APPARATUS FOR LASER CUTTING WITH DOUBLE-FLOW AND DOUBLE-FOCUS CUTTING HEAD
Document Type and Number:
Japanese Patent JP3798975
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a method and an apparatus by which structural steel is cut while minimizing or removing the layer of surface oxide and on the other hand metal coated by a plastic film is cut while vaporizing a surface layer film.
SOLUTION: In the method and the device, a main laser beam 10 is generated by a laser generator, the main laser beam 10 is divided into two subsidiary laser beams and a workpiece is separately irradiated with the subsidiary laser beams from two outlet nozzles 3 and 4 which are coaxially formed respectively by a first optical means 1. A central beam 11 is condensed on a focus (RF) by a first condensing means 1 and also the other beams are focused onto an annular focusing zone (ZAF) by a second focusing means 2.


Inventors:
クリストフ・ベルテズ
Application Number:
JP2001000378926
Publication Date:
July 19, 2006
Filing Date:
December 12, 2001
Export Citation:
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Assignee:
レール・リキード-ソシエテ・アノニム・ア・ディレクトワール・エ・コンセイユ・ドゥ・スールベイランス・プール・レテュード・エ・レクスプロワタシオン・デ・プロセデ・ジョルジュ・クロード
International Classes:
B23K26/06; B23K26/067; B23K26/073; B23K26/14; (IPC1-7): B23K26/06; B23K26/14
Domestic Patent References:
JP11005184A
JP7080672A
JP9103895A
JP49101993A
JP50018240B1
JP1143783A
JP51147446A
Attorney, Agent or Firm:
鈴江 武彦
村松 貞男
坪井 淳
橋本 良郎
白根 俊郎