Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Experimental Verification of Characteristics of Magnetic Abrasive Polishing Combined with Ultrasonic Vibration

실험계획법에 의한 초음파가 부가된 자기연마가공의 특성평가

  • Jin, Dong-Hyun (Dept. of Mechanical Engineering, Pukyung Nat'l Univ.) ;
  • Kwak, Jae-Seob (Dept. of Mechanical Engineering, Pukyung Nat'l Univ.)
  • 진동현 (부경대학교 기계공학과) ;
  • 곽재섭 (부경대학교 기계공학과)
  • Received : 2015.01.15
  • Accepted : 2015.04.13
  • Published : 2015.09.01
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Abstract

In this paper, we propose an ultrasonic magnetic abrasive polishing (US-MAP) technique to effectively machine a high-strength material, and we prove the efficiency of hybrid finishing. We use Taguchi's experimental method to determine the influence of each parameter. Based on the results, US-MAP exhibited a higher polishing efficiency than traditional MAP, and a suitable frequency for hybrid finishing was 28 kHz. When investigating the effect of the parameters on the surface roughness, the ultrasonic amplitude had the greatest effect. However, when machining with $55-{\mu}m$ amplitude, the machining efficiency decreased as the magnetic flux density varied.

본 논문에서는 고경도의 재료를 효과적으로 가공하기 위하여 초음파-자기연마 복합가공을 제시하고, 초음파-자기연마 복합가공의 효율성을 검증하기 위해. 실험계획법을 적용하여 각 인자의 영향력을 평가하였다. 그 결과, 기존의 자기연마가공보다 초음파-자기연마가공의 가공효율이 더 높게 나타났으며, 초음파-자기연마 복합가공에서 가장 적절한 주파수는 28kHz 인 것으로 나타났다. 또 표면거칠기에 대한 인자의 영향을 평가하였을 때, 초음파의 진폭이 가장 큰 영향을 미치는 것을 확인하였다. 그러나 $55{\mu}m$ 의 진폭이 적용되었을 때, 자속밀도의 변화에도 불구하고 가공효율이 오히려 떨어지는 것으로 나타났다. 이러한 결과로부터 지나치게 큰 초음파 진폭은 오히려 자기연마가공의 효과를 저하시키는 것임을 알 수 있었다.

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References

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