Cutting inserts for a side milling cutter and a side milling...

B - Operations – Transporting – 23 – C

Patent

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Details

B23C 5/20 (2006.01) B23C 5/08 (2006.01) B23C 5/22 (2006.01)

Patent

CA 2234474

A cutting insert for milling cutter tools, primarily for side milling cutters and slotting cutters, has upper and lower, mutually opposed surfaces (17,18), of which at least the lower one (17) is substantially planar in order to form a bottom surface that may bear against a cooperating support surface on the milling cutter tool. Further, the cutting insert comprises mutually opposed first and second side surfaces (20) and mutually opposed third and fourth side or gable surfaces (30,31), which either forms a main cutting edge (23,25) at an edge line distal from the bottom surface (17). The cutting insert may be rotated half a revolution in order to indexate the one and the other main cutting edge, respectively. One of the main cutting edges (25) is more distant than the other main cutting edge (23) from the center axis of the screw hole, the more distant cutting edge being shorter than the nearer cutting edge (23) and located substantially symmetrically relative to the middle of said side or gable surface (30) in this way, when the cutting inserts are mounted into alternate directions in the side milling cutter, a chip partition is obtained, and thereby an improved chip-flow.

Plaquette de coupe destinée aux outils de fraisage, principalement aux fraises trois tailles et aux fraises pour rainure en T, comportant des surfaces supérieure et inférieure, mutuellement opposées (17, 18), dont au moins une, la surface inférieure (17), est essentiellement plane afin de constituer une surface de fond qui peut s'asseoir sur une surface d'appui de l'outil de fraisage. De plus, la plaquette de coupe compte une première et une deuxième surfaces latérales (20) mutuellement opposées et une troisième et une quatrième surfaces latérales ou versants (30, 31) mutuellement opposés constituant une arête principale (23, 25) à une ligne de tranchant distante de la surface de fond (17). La plaquette de coupe peut être tournée sur un demi-tour afin d'indexer, respectivement, l'une et l'autre arête principale. Une des principales arêtes (25) est plus éloignée que l'autre arête principale (23) de l'axe central du trou de vis; l'arête la plus éloignée est plus courte que l'arête la plus rapprochée (23) et elle est placée essentiellement de manière symétrique par rapport au milieu de la surface latérale ou du versant (30) visés. De cette manière, lorsque les plaquettes de coupe sont fixées dans des directions alternées dans la fraise trois tailles, il y a séparation des copeaux, et, de ce fait, une meilleure dispersion de ces derniers.

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