Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Compensation of Geometric Error by the Correction of Control Surface

제어곡면 수정에 의한 기하오차 보정

  • Ko, Tae-Jo (Dept.of Mechanical Engineering, Yeungnam University) ;
  • Park, Sang-Shin (Dept.of Mechanical Engineering, Yeungnam University) ;
  • Kim, Hee-Sool (Dept.of Mechanical Engineering, Yeungnam University)
  • Published : 2001.04.01
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Abstract

Accuracy of a machined part is determined by the relative motion between the cutting tool and the workpiece. One of the important factors which affects the relative motion is the geometric errors of a machine tool. In this study, firstly, geometric errors are measured by laser interferometer, and the positioning error of each control point selected uniformly on the control surface CAD model can be estimated from th oirm shaping model and geometric error data base. Where a form shaping function is derived from the link of homogeneous transformation matrix. Secondly, control points are shifted to the estimated amount of positioning errors. A new control surface is modeled with NURBS(Non Uniform Rational B-Spline) surface approximation to the shifted control points. By generating tool paths to the redesigned control surface, we reduce the machining error quite.

Keywords

References

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