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Stress Modeling of the Laser Drilling Process in Carbon Steel

레이저 드릴링을 통한 강판 가공 시 응력 모델링

  • Lee, Wooram (Dept. of Mechanical and Automotive Engineering, Seoul Nat'l Univ. of Science and Technology) ;
  • Kim, Joohan (Dept. of Mechanical and Automotive Engineering, Seoul Nat'l Univ. of Science and Technology)
  • 이우람 (서울과학기술대학교 기계.자동차공학과) ;
  • 김주한 (서울과학기술대학교 기계.자동차공학과)
  • Received : 2012.12.27
  • Accepted : 2013.04.29
  • Published : 2013.07.01

Abstract

A laser machining process has been applied in many manufacturing fields and it provides an excellent energy control for treating materials. However, a heat effect during laser machining can deteriorate material properties. Specifically, a thermally induced stress can be a problem in laser-machined structures on a metal surface. In this study, temperature and stress on cold-rolled carbon steel sheet machined with laser hole drilling were explored in an experimental approach and a numerical method. Stresses by temperature gradients inside the materials were generated in fast cooling. The stresses were measured by using a hole-drilling method and the material properties of carbon steel (SCP1-S) were obtained in the experiment. It was found that the stress predicted from the numerical analysis was in agreement with the stresses measured by using the hole-drilling method. The analysis can be applied for evaluating structure characteristics machined with a laser.

Keywords

Topology Laser Drilling;Hole-Drilling Method;Stress

Acknowledgement

Supported by : 한국연구재단

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