Helical mill having multiple flutes with differing rake angles

Details Helical mill having multiple flutes with differing rake angles Helical mill having multiple flutes with differing rake angles

B - Operations, Transporting

23

C

B23C 5/10 (2006.01)

Patent

CA 2329110

A multiple fluted helical end mill (10) with at least two flutes (20-26). Each flute includes a plurality of inserts (38) secured therein. The inserts (38) are all identical. The inserts (38) in different flutes (20-26) being secured therein at different rake angles (.alpha...beta.). The different rake angles (.alpha...beta.) resulting in different effective axial lengths (EAL) of the inserts. This different effective length of inserts in adjacent flutes results in all effective cutting and it is particularly beneficial where the inserts in a given flute do not have overlapping cutting edges.

On décrit un foret (10) en bout hélicoïdal à goujures multiples comprenant au moins deux goujures (20-26). Chaque goujure comprend plusieurs éléments rapportés (38) qui sont fixés dans cette dernière; les éléments rapportés (38) fixés dans des goujures différentes (20-26) étant placés à des angles de coupe différents ( alpha , beta ) dans lesdites goujures. Les angles de coupe différents ( alpha , beta ) produisent des longueurs axiales efficaces (LAE) différentes pour les éléments rapportés. Cette longueur axiale efficace différente des éléments rapportés dans des goujures adjacentes produit une coupe totalement efficace et est tout particulièrement bénéfique lorsque les éléments rapportés situés dans une goujure donnée ne présentent pas de bords coupants se chevauchant.

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