NC Data Generation for Five-Axis Control Machining
Using Curved Interpolation
-Application of Five-Dimensional Non-Uniform B-spline Curve-
Koichi MORISHIGE, Seiji TAKAHASHI and Yoshimi TAKEUCHI
Proceedings of 1st International Seminar on
PRogress in Innovative Manufacturing Engineering (PRIME2001),
pp.89-94 (Sestri Levante [Genoa], Italy, June 20-22, 2001)
The study describes NC data generation method for five-axis machining
using curved interpolation. In conventional linear interpolation,
the amount of NC data tends to increase with increasing the geometrical
accuracy of workpiece configurations, which often leads to the reduction
in feed speed of machine tools. On the contrary, the curved interpolation
requires only a few parameters to express workpiece configurations.
In this study, five-dimensional non-uniform B-spline is employed to
compress NC data by the curved interpolation. NC data can be significantly
reduced by appropriately selecting knot vectors using the
equivalent-curvature-area-division-method. From experimental results,
it is confirmed that the curved interpolation has the potential of
reducing the amount of NC data without deteriorating the surface roughness
and machining accuracy.
http://www.ims.mce.uec.ac.jp/
2001, by K.Morishige