Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Development of a Shear Testing Machine for a Miniature Single Solder Ball Joint using Piezoelectric Loading Device

피에조를 이용한 초소형 단일 솔더볼 연결부의 전단 시험장치 개발

  • Kwon, Yong-Sang (Department of Automotive Engineering, Seoul National University of Technology) ;
  • Ko, Guk-Jong (Department of Automotive Engineering, Seoul National University of Technology) ;
  • Kim, Ho-Gyeong (Department of Automotive Engineering, Seoul National University of Technology)
  • 권용상 (서울산업대학교 자동차공학과) ;
  • 고국종 (서울산업대학교 자동차공학과) ;
  • 김호경 (서울산업대학교 자동차공학과)
  • Received : 2009.10.30
  • Accepted : 2009.11.25
  • Published : 2010.02.28
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Abstract

A miniature shear testing machine was designed and developed, adopting a piezoelectric actuator with mechanical advantage using 4 levers in order to investigate shear behavior of a small solder ball. The final output displacement was initially expected to be 2.88 mm without load resistance, considering the lever ratio of 24 and the piezo displacement of 0.12 mm with an exciting voltage of 10 V. However, the final plunger displacement ${\Delta}{\upsilon}$ can be expected as ${\Delta}{\upsilon}=2.88-3.04{\times}10^{-4}F$ as a function of piezoelectric force F due to the stiffness of various levers and connectors and piezo actuator. The shear behavior of lead-free solder ball in diameter of $760{\mu}m$ was successfully investigated in a speed range of 2 mm/s~0.0035 mm/s using this designed device.

Keywords

References

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Cited by

  1. 마그네틱 파우더 브레이크를 이용한 소형 진자형 충격시험기 개발 vol.27, pp.3, 2010, https://doi.org/10.9725/kstle.2011.27.3.140