Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Investigation of Deep Drawability and Product Qualities of Ultra Thin Beryllium Copper Sheet Metal

베릴륨동 극박판의 드로잉 성형성과 품질특성 연구

  • 박사성 (서울산업대학교 산업대학원) ;
  • 황규복 (서울산업대학교 제품설계금형공학과, (주)닛시) ;
  • 김종봉 (서울산업대학교 자동차공학과) ;
  • 김종호 (서울산업대학교 제품설계금형공학과)
  • Received : 2010.01.25
  • Accepted : 2010.03.19
  • Published : 2010.06.01
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Abstract

The present study is focused on the deep drawability and product qualities of ultra thin beryllium copper sheet metal. The goal of this research is to investigate the limit drawing ratio in deep drawing of ultra thin beryllium copper metal. For the experiment, beryllium copper(C1720, $50{\mu}m$ in thickness) is used. Tensile test are also carried out to find out the material properties. Deep drawing experiments are carried out in Universal Testing Machine(UTM) to obtain limit drawing ratio. Deep drawing tests are carried out for various specimen sizes. Teflon film is used as a lubricant and constant blank holding force is imposed. Sheet thickness and surface hardness are measured along radial direction after deep drawing. Thickness is measured using optical microscope. For beryllium copper(C1720), the maximum LDR of 2.4 is obtained when the die shoulder radius is 20 or 30 times of sheet thickness.

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References

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