Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Failure Analysis and Weibull Statistical Analysis according to Impact Test of the Angular Pin for Injection Molding Machines

사출금형기계용 앵귤러핀의 충격시험에 따른 파손분석과 와이블 통계 해석

  • Kim, Cheol-Su (UR Interdisciplinary Program of Mechanical, Engineering, Pukyong National University) ;
  • Nam, Ki-Woo (Department of Materials Science and Engineering, Pukyong National University) ;
  • Ahn, Seok-Hwan (Department of Mechatronics, Jungwon University)
  • 김철수 (부경대학교 학연협동기계공학) ;
  • 남기우 (부경대학교 재료공학과) ;
  • 안석환 (중원대학교 메카트로닉스학과)
  • Received : 2016.12.13
  • Accepted : 2017.04.17
  • Published : 2017.06.30
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Abstract

In this study, failure analysis of the angular pin for molding machines to aluminum component molding was carried out. SM45C steel was used for the angular pin, it was surface hardened by the induction surface hardening heat treatment. The cross section of damaged angular pin was observed, and micro Vickers hardness value from the fractured part was measured. Brittle fracture was occurred from the fracture surface of angular pin, therefore, impact toughness value was evaluated by V-notch Charpy impact test. It was confirmed that the impact absorption energy was high when was tempered at a high temperature for a long time, and the toughness was slightly increased. Also, 2-parameter Weibull statistical analysis was investigated in order to evaluate the reliability of the measured micro Vickers hardness values and absorbed energy. The micro Vickers hardness and absorbed energy well followed a two-parameter Weibull probability distribution, respectively. The reverse design against angular pin was proposed as possible by using test results.

Keywords

References

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