• 제목/요약/키워드: quick-stop cut

검색결과 3건 처리시간 0.018초

연속재결정법에 의한 2차원 절삭가공면의 소성스트레인에 관한 연구 (Machined Surface Plastic Strain in Orthogonal Cutting by Subsequent Recrystallizations Technique)

  • 반야풍;김태영;문상돈
    • 한국정밀공학회지
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    • 제13권4호
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    • pp.61-66
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    • 1996
  • The subsequent recrystallizations technique, and experimental strain measurement method by use of recrystallization phenomena, has been successfully applied for the observation of machined surface plastic zones with equivalent plastic strain .epsilon. .geq. 0.5, 0.12 and 0.02 of type 304 stainless steel. The depth of the zone with .epsilon. .geq. 0.5 is very small, 10-15 .mu. m, while those with .epsilon. .geq. 0.12 are 100-200 .mu. m and 200-450 .mu. m, respectively. The depths increase with increasing depth of cut and with decreasing rake angle. The relation between the depth of the zones and the cutting paramenters is shown. The deformation state ahead of the quick-stop cut was also well visualized by the technique.

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복합재료의 직교 절삭가공 특성에 관한 연구 (A study on the orthogonal cutting characteristics of glass fiber reinforced plastics)

  • 송화용;정용운;김준현;김주현
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2001년도 추계학술대회(한국공작기계학회)
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    • pp.155-160
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    • 2001
  • In the use of glass fiber reinforced plastics(GFRP) it is often necessary to cut the components, but the cutting of GFRP is often made difficult by the delamination of the compositions and short tool life. Experimental investigation was conducted to evaluate the chip formation of the glass fiber reinforced plastics during orthogonal cutting. The chip formation process, cutting force, and thrust force were studied. The chip formation processes were studied through the use of quick-stop device. Chip-tool contact areas were obtained with the use of the quick-stop device, and observed using optical microscopy after polishing. Cutting force and thrust force were measured through the use of the tool dynamometer.

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정밀가공면의 소성스트레인 측정을 위한 새로운 기법의 개발 (A New Technique Development for Measuring Plastic Strain of Precision Machined Surface)

  • 김태영;반야풍;문상돈
    • 한국정밀공학회지
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    • 제15권4호
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    • pp.141-147
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    • 1998
  • A plastically deformed layer in the precision machined surface affects in various forms the physical properties of machined components such as the fatigue strength, the dimensional instability, microcracks and the stress corrosion cracking. These physical properties, so called surface integrity, are very important for designing highly stressed and critically loaded components. Typical plastic strains in the precision machined surface are very difficult to measure, since they are located within a very short distance from the surface and they change very rapidly. A new way is suggested to determine the residual strain in plastically deformed materials by analyzing the plastically deformed layer after a subsequent recrystallization process. This investigation is to explore a new technique for measuring plastic strain in machining applications, and in particular, to and the effect of cutting parameters(rake angle, depth of cut, specific cutting energy), on the plastic strains and strain energy.

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