• 제목/요약/키워드: 스위스형 선반

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유한요소법을 이용한 소형 고속 CNC 선반 스핀들 시스템의 베어링 강성에 따른 휘돌림 궤적 특성 연구 (Analysis of whirl behavior follow bearing stiffness in a small size and high speed CNC lathe spindle system using F.E.M.)

  • 김무수;이재훈;;이시복;박성훈
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2008년도 추계학술대회논문집
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    • pp.182-183
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    • 2008
  • In this study, rotor dynamic analysis have been conducted using three-dimensional solid model. Analysis object has smaller size and higher speed than any general CNC spindle. It is important to consider the real supporting conditions and external forces for whirl behavior analysis. As a results, the bearing stiffness is higher, whirl motion is less than before.

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공압식 소재물림 가이드부쉬 시스템의 설계 및 가공정도 평가 (Design and Machining Precision Evaluation of Pneumatic Clamping Type Guide-bush System)

  • 이재훈;이수민;박성훈;이시복
    • 한국생산제조학회지
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    • 제19권6호
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    • pp.859-866
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    • 2010
  • Generally, a fixed type guide-bush system is installed during machining miniature work-pieces with high precision in the multi-task CNC lathe. But a conventional guide-bush system does not provide a constant clamping force under the condition of varying work-piece diameters. It is important to maintain a constant clamping force for guaranteeing machining precision. This paper proposes a new guide-bush system with a pneumatic clamping device for the CNC Swiss-turn lathe to keep constant clamping force with changes in work-piece diameters. Through performance tests, new clamping system developed in the study showed better machining precision at the cost of a small increase in the temperature of the system than conventional systems due to an increase in the frictional heat and a change in the heat transfer route.