Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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A Study on Preventing Cracks at the Small Hole Exit in Ultrasonic Machining Using a Wax Coating

초음파 미세구멍 관통가공에서 왁스 코팅을 이용한 출구크랙 방지에 관한 연구

  • Li, Hang (School of Mechanical Engineering, Yeungnam University) ;
  • Ko, Tae Jo (School of Mechanical Engineering, Yeungnam University) ;
  • Baek, Dae Kyun (School of Mechanical Engineering, Kyoungbuk University)
  • 이항 (영남대학교 기계공학부) ;
  • 고태조 (영남대학교 기계공학부) ;
  • 백대균 (경북대학교 기계공학부)
  • Received : 2015.04.20
  • Accepted : 2015.05.28
  • Published : 2015.06.30
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Abstract

Ultrasonic machining (USM) does not involve heating or any electrochemical effects, and subsequently causes low surface damage, has small residual stress, and does not rely on the conductivity of the workpiece. These characteristics are suitable for the machining of brittle materials, such as glass or ceramics. However, USM for brittle materials generates cracks on the workpiece while machining, especially at the hole exit with a small diameter. In this study, wax coating was used to deposit wax on the back side of the workpiece to decrease the occurrence of cracks at the exit holes in USM, and it was finally removed with a cleaning process. The experimental results show that this technique is beneficial for restricting the occurrence of cracks in glass or ceramics.

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References

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