True helical cutter system

B - Operations – Transporting – 23 – C

Patent

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Details

B23C 5/20 (2006.01) B23C 5/10 (2006.01) B26D 1/12 (2006.01)

Patent

CA 2486839

A cutter system (10) that is designed to create a continuous cutting true helix while having true helical inserts (14) that are indexable on at least two cutting edges. The shape of the insert (14) allows an interlocking overlap of the cutting edges (66 and 68) for an all effective true helical cut. The helix ground into the insert faces creates a smooth cutting action as a solid helical endmill. High positive radial and axial rakes enable free cutting machining with a fine finish and low horsepower consumption. The back (34c) of the insert (14) has a diamond shaped island (42) that is used for locating the insert in the mounting pocket of the cutter and is used for face contact on lockup when the insert screw is tightened.

La présente invention concerne un système de fraise (10) conçu pour créer une vraie hélice de fraisage continue alors qu'il est équipé de plaquettes véritablement hélicoïdales indexables (14) sur au moins deux arêtes de coupe. La forme de la plaquette (14) permet un verrouillage par chevauchement des arêtes de coupe (66 et 68) destiné à fournir un fraisage véritablement hélicoïdal totalement efficace. L'hélice meulée dans les faces des plaquettes crée une action de fraisage régulière comme celle d'une fraise hélicoïdale en bout monobloc. Des angles de coupe radiaux et axiaux positifs élevés permettent un usinage de décolletage avec un fini de qualité et une consommation d'énergie plus faible. Le dos (34c) de la plaquette (14) est muni d'un îlot en forme de diamant (42) qui facilite la mise en place de la plaquette dans la poche de montage de la fraise et qui sert de face de contact lors du verrouillage, au moment où on serre la vis de la plaquette.

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