Micro cutting of thin copper plate by fiber laser with laval nozzle

Yasuhiro Okamoto, Norio Kataoka, Hirokazu Tahara, Ken Shiwayama, Yoshiyuki Uno

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Fiber laser has many advantages such as compact size, high conversion efficiency, good beam mode, air cooling and maintenance free. Therefore, it has high possibility as an industrial light source in the near future. The beam from fiber laser can be focused in a micro spot because of its excellent beam quality. However, the narrow kerf leads to the difficulty of outflow of melted mate-rial. Therefore, micro cutting by a single-mode fiber laser is considerably difficult, then the high performance nozzles are strongly required. In the previous work, authors developed a high perform-ance nozzle, which can increase the velocity of assist gas flow and makes it possible to reduce the dross in the micro kerf. Therefore, high performance cutting by a single-mode fiber laser can be ex-pected by using our newly designed nozzle. In this study, the effect of nozzle shape on the machin-ing results in precision cutting of thin copper plate by a Q-switched single-mode fiber laser was ex-perimentally investigated. It was found that the high speed cutting at 30mm/s could be carried out by the high performance nozzle under low pulse frequency condition. Besides, the reduction of the dross and good kerf shape could be attained in the case of nitrogen assist gas.

Original languageEnglish
Pages (from-to)243-246
Number of pages4
JournalJournal of Laser Micro Nanoengineering
Volume1
Issue number3
DOIs
Publication statusPublished - Dec 1 2006

Fingerprint

Fiber lasers
nozzles
fiber lasers
Nozzles
Copper
copper
Single mode fibers
air cooling
Beam quality
Conversion efficiency
maintenance
gas flow
Flow of gases
Light sources
light sources
high speed
Nitrogen
Cooling
nitrogen
Air

Keywords

  • High-performance nozzle
  • Q-switched single-mode fiber laser
  • Thin copper plate

ASJC Scopus subject areas

  • Instrumentation
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

Cite this

Micro cutting of thin copper plate by fiber laser with laval nozzle. / Okamoto, Yasuhiro; Kataoka, Norio; Tahara, Hirokazu; Shiwayama, Ken; Uno, Yoshiyuki.

In: Journal of Laser Micro Nanoengineering, Vol. 1, No. 3, 01.12.2006, p. 243-246.

Research output: Contribution to journalArticle

Okamoto, Yasuhiro ; Kataoka, Norio ; Tahara, Hirokazu ; Shiwayama, Ken ; Uno, Yoshiyuki. / Micro cutting of thin copper plate by fiber laser with laval nozzle. In: Journal of Laser Micro Nanoengineering. 2006 ; Vol. 1, No. 3. pp. 243-246.
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