• 제목/요약/키워드: Machine tools metrology

검색결과 4건 처리시간 0.016초

기준물을 이용한 NC 공작기계의 오차규명 및 보상제어 (Error Identification and Compensation for NC Machine Tools Using the Reference Artifact)

  • 정성종
    • 한국생산제조학회지
    • /
    • 제9권2호
    • /
    • pp.102-111
    • /
    • 2000
  • Methodology of volumetric error identification and compensation is presented to improve the accuracy of NC machine tools by using a reference artifact and a touch trigger probe. Homogeneous transformation matrix and kinematic chain are used for modeling the geo-metric and thermal errors of a three-axis vertical machining center. The reference artifact is designed and fabricated to identify the model parameters by machine tool metrology. Parameters in the error model are able to be identified and updated by direct measurement of the reference artifact on the machine tool under the actual conditions which include the thermal interactions of error sources. A volumetric error compensation system based on IBM/PC is linked with a FANUC CNC controller to compensate for the identified volumetric error in machining workspace.

  • PDF

기준물을 이용한 NC 공작기계의 체적오차 규명 (Volumetric Error Identification for NC Machine Tools Using the Reference Artifact)

  • 김경돈;정성종
    • 대한기계학회논문집A
    • /
    • 제24권12호
    • /
    • pp.2899-2908
    • /
    • 2000
  • Methodology of volumetric error identification is presented to improve the accuracy of NC machine tools by using a reference artifact and a touch trigger probe. Homogeneous transformation matrix and kinematic chain are used for modeling the geometric and thermal errors of a three-axis vertical machining center. The reference artifact is designed and fabricated to identify the model parameters by machine tool metrology. Parameters in the error model are able to be identified and updated by direct measurement of the reference artifact on the machine tool under the actual conditions which include the thermal interactions of error sources. The proposed method can speed up and simplify volumetric error identification processes.

ESPI를 이용한 세탁기 적용 기계 구조물의 면내변위 측정에 관한 연구 (The Study on Measurement of In-Plane Displacement in Mechanical Structure applied to Washing Machine using ESPI)

  • 이학주;김상태;최은오;장석원
    • 대한기계학회:학술대회논문집
    • /
    • 대한기계학회 2001년도 춘계학술대회논문집A
    • /
    • pp.108-113
    • /
    • 2001
  • Recently, the mechanical structures applied to many industrial products, especially in electronic products, appear to be miniaturized and complicated. This trend makes it difficult to analyze the stress distribution of those mechanical structures and generates new challenges for precise measurement of strain. Therefore, generally most of those cases largely depend on the finite element analysis. But the development of optical metrology which has the capability of non-contact, full-field and precise measurement makes it possible to solve these measuring problems. Among the optical measurement techniques, the electronic speckle pattern interferometry (ESPI) has been developed and considered as one of the most useful tools for measuring displacement and deformation. But the shortage of recognition and difficulties of measurement have limited its industrial applications in spite of its excellent capabilities. Therefore in this study, in order to enhance the industrial application of ESPI, the measurement of in-plane displacement of mechanical structure with ESPI, which is applied to washing machine and cannot be measured by strain gauges, was performed. And the verification of validity of FEA results was also done.

  • PDF

Four Degree-of-Freedom Geometric Error Measurement System with Common-Path Compensation for Laser Beam Drift

  • Qibo, Feng;Bin, Zhang;Cuifang, Kuang
    • International Journal of Precision Engineering and Manufacturing
    • /
    • 제9권4호
    • /
    • pp.26-31
    • /
    • 2008
  • A precision four-degree-of-freedom measurement system has been developed for simultaneous measurement of four motion errors of a linear stage, which include straightness and angular errors, The system employs a retro-reflector to detect the straightness errors and a plane mirror to detect the angular errors. A common-path compensation method for laser beam drift is put forward, and the experimental results show that the influences of beam drift on four motion errors can be reduced simultaneously. In comparison with the API 5D laser measuring system, the accuracy for straightness measurement is about ${\pm}1.5{\mu}m$ within the measuring range of ${\pm}650{\mu}m$, and the accuracy for pitch and yaw measurements is about ${\pm}1.5$ arc-seconds within the range of ${\pm}600$ arc-seconds.