Design & Manufacturing

  • 제16권4호
  • /
  • Pages.46-51
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  • 2022
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  • 2800-0323(pISSN)
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  • 2733-452X(eISSN)
한국금형공학회 (Korean Society of Die & Mold Engineering)
권호 표지

알루미늄 홀 가공 하중 분석을 통한 펀치 마모수준 예측에 관한 연구

A study on the prediction of punch wear level through analysis of piercing load of aluminum

  • 전용준 (한국생산기술연구원 금형성형연구부문)
  • Yong-Jun Jeon (Mold & Metal Forming R&D Department, Korea Institute of Industrial Technology)
  • 투고 : 2022.12.06
  • 심사 : 2022.12.31
  • 발행 : 2022.12.31
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초록

The piercing process of creating holes in sheet metals for mechanical fastening generates high shear force. Real-time monitoring technology could predict tool damage and product defects due to this severe condition, but there are few applications for piercing high-strength aluminum. In this study, we analyzed the load signal to predict the punch's wear level during the process with a piezoelectric sensor installed piercing tool. Experiments were conducted on Al6061 T6 with a thickness of 3.0 mm using piercing punches whose edge angle was controlled by reflecting the wear level. The piercing load increases proportionally with the level of tool wear. For example, the maximum piercing load of the wear-shaped punch with the tip angle controlled at 6 degrees increased by 14% compared to the normal-shaped punch under the typical clearance of 6.7% of the aluminum piercing tool. In addition, the tool wear level increased compression during the down-stroke, which is caused by lateral force due to the decrease in the diameter of pierced holes. Our study showed the predictability of the wear level of punches through the recognition of changes in characteristic elements of the load signal during the piercing process.

키워드

과제정보

본 연구는 한국생산기술연구원 기관주요사업 "Add-on 모듈 탑재를 통한 지능형 뿌리 공정 기술 개발(KITECH EO-22-0005)"의 지원으로 수행한 연구입니다.

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