Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study on the Ball-Bar Artifact for the Volumetric Error Calibration of Machine Tools

Machine Tools 공간오차 분석을 위한 Bal1-bar Artifact 연구

  • 이응석 (충북대학교 대학원 기계공학부) ;
  • 구상서 (충북대학교 대학원 기계공학) ;
  • 박달근 (충북대학교 기계공학부)
  • Published : 2004.07.01
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Abstract

For volumetric error measurement and calibration for machine tools, manufacturing machine or coordinate measuring machine (CMM), are studied using a Ball-bar artifact. A design of the Ball-bar is suggested manufactured by Invar, which is a low thermal expansion material, and precision steel balls. The uncertainty for the artifact method is discussed. A method of the Ball-bar artifact for obtaining 3-D position errors in CMM is proposed. The method of error vector measurement is shown using the Ball-bar artifact. Finally, the volumetric error is calculated from the error vectors and it can be used for Pitch error compensation in conventional NC machine and 3-D position Error map for calibration of NC machine tools.

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References

  1. British Standard, 1989, BS 6808 Part 3 : Coordinate Measuring Machines
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  4. Zhang, G. 1985, 'Error Compensation of Coordinate Measuring Machines,' Annals of the CIRP, Vol. 34/1
  5. Si Tae Won, 2001, 'The Effects of the Annealing Heat Treatments on the Mechanical Properties of the 1nvar Materials,' KSPE. Vol. 18, No.1, pp. 129-138