Milling cutting insert

B - Operations – Transporting – 23 – C

Patent

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Details

B23C 5/20 (2006.01) B23B 27/16 (2006.01)

Patent

CA 2202391

A milling cutting insert comprises an upper side (2), a bottom side (3) and flank surfaces (4) connecting these two sides. At each operative cutting corner is a projection (17), which is depressed relative to the adjacent main cutting edge (5) and corner cutting edge (6). At the front upper edge of the projection is the wiper edge (16) that generates the surface on the workpiece. By tipping the cutting insert axially positively and radially negatively, the horizontally located wiper edge may be tipped frontwards into contact with the workpiece, while the vertically located wiper edge is tipped backwardly, so that it does not reach the workpiece. In this way an improved axial clearance is made possible and an undesired groove in the workpiece is avoided, which would otherwise be caused by the vertically located wiper edge.

Une pièce rapportée de fraisage comprend un côté supérieur (2), un côté inférieur (3) et des surfaces latérales (4) reliant ces derniers. Une saillie (17) en retrait par rapport à l'arête de coupe principale adjacente (5) et une arête de coupe d'angle (6) est prévue au niveau de chaque angle de coupe actif. Une arête de planage (16) produisant la surface sur la pièce à usiner est prévue au niveau de l'arête frontale supérieure. Lorsqu'on fait basculer la pièce rapportée de coupe positivement dans le sens axial et négativement dans le sens radial, l'arête de planage horizontale peut être basculée vers l'avant et vient en contact avec la pièce, alors que le bord de planage placé verticalement bascule vers l'arrière de sorte qu'il ne touche pas la pièce. Ainsi, on ménage un espace axial plus important et on empêche la formation d'une rainure indésirable dans la pièce par l'arête de planage placée verticalement.

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