End mill for orbital drilling of fiber reinforced plastic...

B - Operations – Transporting – 23 – C

Patent

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B23C 5/10 (2006.01)

Patent

CA 2681447

A center or non-center cutting end mill (10) for orbital drilling of fiber reinforced plastic (FRP) materials includes a shank (12), a neck (14), a cutting head (16)and two or more flutes (36, 38). The end mill (10) has a tool geometry with the following features: a dish angle (28) between about 2 degrees to about 6 degrees; a helix angle (44) between about 5 degrees to about 18 degrees; an end teeth radial rake angle (46) between about 0 degrees and about 15 degrees; a peripheral teeth radial rake angle (47) between about 8 degrees and about 16 degrees; a gashing axial rake angle (48) between about 3 degrees to about 10 degrees; and a primary clearance angle between about 10 degrees to about 18 degrees. The end mill is made from a tungsten carbide substrate with cemented cobalt and a diamond coating.

L'invention concerne un fraise en bout pour coupe centrale ou non-centrale (10) destinée au perçage orbital de matériaux plastiques renforcés par des fibres (FRP) qui inclut une tige (12), un col (14), une tête de coupe (16) et deux ou plusieurs goujures (36, 38). La fraise en bout (10) présente un géométrie d'outil avec les caractéristiques suivantes : un angle de tuilage (28) se situant entre environ 2 degrés et environ 6 degrés ; un angle d'hélice (44) se situant entre environ 5 degrés et environ 18 degrés ; un angle de coupe radial de dent d'extrémité (46) se situant entre environ 0 degré et environ 15 degrés ; un angle de coupe radial de dent périphérique (47) se situant entre environ 8 degrés et environ 16 degrés ; un angle de coupe radial d'ébauche (48) se situant entre environ 3 degrés et environ 10 degrés ; et l'angle de dépouille primaire se situant entre environ 10 degrés et environ 18 degrés. La fraise en bout se compose d'un substrat en carbure de tungstène avec du cobalt cimenté et un revêtement diamant.

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