Rotary cutting tool

B - Operations – Transporting – 23 – B

Patent

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Details

B23B 31/00 (2006.01) B23B 31/11 (2006.01) B23B 31/113 (2006.01) B23D 77/00 (2006.01) B23D 77/04 (2006.01) B23D 77/10 (2006.01)

Patent

CA 2750954

A rotary cutting tool (20) for reaming operations, including a generally cylindrically shaped tool shank (22) with a longitudinal axis (A1) having a plurality of radially protruding and generally axially extending clamping wings (38), and a cylindrically shaped cutting head (24) having a central bore (58) and a plurality of axially extending cutting edges (62) with an outer cutting diameter (D). The central bore (58) has a plurality of circumferentially and alternately spaced bore sectors (70) and bore recesses (72), where each bore sector (70) has an outwardly inclined female clamping surface (74) in clamping contact with an outwardly inclined male clamping surface (40) of each clamping wing (38). A cylindrical shaped locking sleeve (26) and a cylindrical shaped clamping nut (28) assembled to the tool shank (22) provide a means to adjust the clamping contact forces and the cutting diameter (D) of the cutting head (24), and also enable removal and replacement of the cutting head without removal of the locking sleeve (26) and clampingnut (28).

L'invention concerne un outil de coupe rotatif (20) destiné à des opérations d'alésage, comprenant un corps d'outil généralement cylindrique (22) présentant un axe longitudinal (Al) doté d'une pluralité de languettes de serrage (38) faisant saillie radialement et s'étendant généralement axialement, et une tête de coupe (24) de forme cylindrique comprenant un trou central (58) et une pluralité de bords de coupe (62) s'étendant axialement à diamètre de coupe extérieur (D). Le trou central (58) comprend une pluralité de parties de trou (70) cylindriques espacées alternativement et des évidements de trou (72), chaque partie de trou (70) comprenant une surface de serrage femelle (74) inclinée vers l'extérieur en contact de serrage avec une surface de serrage male (40) inclinée vers l'extérieur de chaque languette de serrage (38). Un manchon de verrouillage cylindrique (26) et un écrou de serrage cylindrique (28) sont assemblés avec le corps de l'outil (22) pour former un moyen de réglage des forces de contact de serrage et du diamètre de coupe (D) de la tête de coupe (24), et[P2] [P3] permettent le retrait et le remplacement de la tête de coupe sans retirer le manchon (26) et l'écrou de serrage (28).

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