Abstract: Numerical machining technology,which refers to orthogonal intersection curve chamfer on inner wall of ceramic tube was systematically studied.Two models were built including mathematical model of orthogonal intersection curve and interpolation function model of cutting tool path.Both special cutter and processing route were designed for chamfer machining.Machining procedures for chamfering were programmed and then verified on a three-axis machining center.The results showed that machining effect was good.The accuracy and efficiency of chamfer was greatly improved by numerical machining method.

Key words: ceramic tube, numerical machining, intersection curve, chamfer, mathematical model