Journal of the Korean Society of Manufacturing Technology Engineers (한국생산제조학회지)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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Displacement Error Estimation of a High-Precision Large-Surface Micro-Grooving Machine Based on Experimental Design Method and Finite Element Analysis

실험계획법과 유한 요소해석을 이용한 초정밀 대면적 미세 그루빙 머신의 변위 오차 예측

  • 이희범 (한국항공대학교 대학원) ;
  • 이원재 (한국항공대학교 대학원) ;
  • 김석일 (한국항공대학교 항공우주 및 기계공학부)
  • Received : 2011.07.22
  • Accepted : 2011.08.03
  • Published : 2011.12.15
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Abstract

In this study, to minimize trial and error in the design and manufacturing processes of a high-precision large-surface micro-grooving machine which is able to fabricate the molds for 42 inch LCD light guide panels, the effects of the structural deformation of the micro-grooving machine according to the positions of the X-axis, Y-axis and Z-axis feed systems were examined on the tool tip displacement errors associated with the machining accuracy. The virtual prototype (finite element model) of the micro-grooving machine was constructed to include the joint stiffnesses of the hydrostatic bearings, hydrostatic guideways and linear motors, and then the tool tip displacement errors were measured from the virtual prototype. Especially, to establish the prediction model of the tool tip displacement errors, which was constructed using the positions of the X-axis, Y-axis and Z-axis feed systems as independent variables, the response surface method based on the central composite design was introduced. The reliability of the prediction model was verified by the fact that the tool tip displacement errors obtained from the prediction model coincided well those measured from the virtual prototype. And the causes of the tool tip displacement errors were identified through the analysis of interactions between the positions of the X-axis, Y-axis and Z-axis feed systems.

Keywords

References

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