Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Characteristics of the Femto-second Pulsed Laser Ablation according to Feed Velocity on the Invar Alloy

펨토초 레이저의 이송속도에 따른 Invar 합금의 어블레이션 특성

  • 정일영 (인하대학교 기계공학과 대학원) ;
  • 강경호 (인하대학교 기계공학과 대학원) ;
  • 김재도 (인하대학교 기계공학과) ;
  • 손익부 (광주과학기술원 고등광기술연구소) ;
  • 노영철 (광주과학기술원 고등광기술연구소) ;
  • 이종민 (광주과학기술원 고등광기술연구소)
  • Published : 2009.03.01
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Abstract

Femto-second laser ablation with the various feed velocities of the Invar alloy and the micro surface milling for the processing condition were studied. We used a regenerative amplified Ti:sapphire laser with a 1kHz repetition rate, 184fs pulse duration time and 785nm wavelength. Femto-second laser pulse was irradiated on the Invar alloy with the air blowing at the condition of various laser peak powers and feed velocities. An ablation characteristic according to feed velocity of the Invar alloy was appeared as the non-linear type at different zone of energy fluence. The micro surface milling of the Invar alloy using a mapping method was investigated. The optimal condition of micro surface milling was laser peak power of 22.8mW, feed velocity of 1 mm/s, beam gap of $1{\mu}m$. With the optimal processing condition, the fine rectangular shape without burr and thermal damage was achieved. Using the femto-second laser system, it demonstrates excellent tool for micro surface milling of the Invar alloy without heat effects and poor edge.

Keywords

References

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