Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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A Study on the Optimal Cutting Depth upon Surface Roughness of Al Alloy 7075 in High-speed Machining

알루미늄 합금 7075의 표면 거칠기에 미치는 고속가공의 최적 절삭 깊이에 관한 연구

  • Bae, Myung-Whan (Department of Mechanical Engineering for Production, Gyeongsang National University) ;
  • Park, Hyeong-Yeol (Graduate School, Gyeongsang National University) ;
  • Jung, Hwa (Computer Applied Mechanical Department, Jinju Campus of Korea Polytechnic)
  • 배명환 (경상대학교 기계설계학과) ;
  • 박형렬 (경상대학교 대학원) ;
  • 정화 (한국폴리텍대학 진주캠퍼스 컴퓨터응용기계과)
  • Received : 2012.08.20
  • Accepted : 2013.03.25
  • Published : 2013.09.01
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Abstract

The high-speed machining in the manufacturing industry field has been widely applied for parts of vehicles, aircraft, ships, electronics, etc., recently, because the effect of cost savings for shortening processing time and improving productivity is great. The purpose in this study is to investigate the effect of cutting depth on the surface roughness of workpiece with the spindle rotational speed and feed rate of high-speed machines as a parameter to find the optimal depth in the finishing for ball end mill of the aluminum alloy 7075 which is used much in aircraft parts. When the cutting depth for the respective feed rate and spindle rotational speed is varied from 0.1 mm to 0.7 mm at intervals of 0.2 mm in the wet finishing of the aluminum alloy 7075 by the insoluble cutting oils and high-speed machining used in the rough machining of previous study, the surface roughness values and the cutting temperature are measured. In addition, the cutting surface shapes of test specimens are observed by optical microscope and compared with respectively. It is found that the surface roughness values and the temperature generated during machining are increased as the feed rate and cutting depth are raised, but those are decreased as the spindle rotational speed is increased.

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References

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