Spherical cutting tool

B - Operations – Transporting – 23 – C

Patent

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Details

B23C 5/10 (2006.01)

Patent

CA 2348287

A spherical cutting tool such as a ball end mill, a tapered ball end mill and the like is disclosed, in which cutting edges are formed on a spherical surface. The tangential lines of the respective points of the cutting edges on a spherical surface are made to have a constant (helix) angle relative to the axis of the tool. A tooth could be formed with the eccentric relief, and the tooth are reinforced with a smaller relief angle and a wider land width. Therefore, the tool can be operated at a higher feed rate, thereby making it possible to improve the machining efficiency.

Cette invention a trait à un outil de coupe sphérique, par exemple, un broyeur à extrémité sphérique, un broyeur effilé à extrémité sphérique et analogue, les bords de coupe étant formés sur une surface sphérique. Les lignes tangentielles des points respectifs des bords de coupe sur la surface sphérique ont un angle constant (angle d'hélice) par rapport à l'axe de l'outil. Une dent peut être formée avec le relief de dépouille et cette dent est renforcée grâce à un angle de dépouille plus petit et à une largeur de facette supérieure. Il est, de la sorte, possible de faire fonctionner cet outil à une vitesse d'avance plus élevée, ce qui permet d'améliorer l'efficacité de l'usinage.

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