Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Die Surface Texturing by Femtosecond Laser for Friction Reduction

펨토초레이저를 이용한 알루미늄 성형다이의 미세가공에 관한 연구

  • 최해운 (계명대학교 기계자동차공학부) ;
  • 신현명 (계명대학교 기계자동차공학부)
  • Published : 2009.05.01
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Abstract

Interface friction in blanking dies, cold forging and extrusion of aluminum alloys is a major cause of inefficient process. This paper describes an investigation of femtosecond laser texturing for reduction of interface friction on sliding surfaces in forming process. Femtosecond direct writing technology was used to fabricate a laser micro-machined die and to create microgroove patterns with varying size and density on metal forming dies. A systematic approach to find the optimum parameters and computer simulation comparison of friction coefficients are provided to study the relation of friction coefficients and die profiles. In metal forming tests, the effectiveness of various laser-machined patterns for enhancing interface lubrication is determined.

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References

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