Cutting insert

Details Cutting insert Cutting insert

B - Operations, Transporting

23

C

B23C 5/20 (2006.01)

Patent

CA 2419760

The invention relates to a cutting insert for machining down workpieces. Said insert comprises several cutting edges (10), in particular for roughing work. A curved cutting corner, or a corner consisting of a large number of short, respectively linear edge sections positioned at obtuse angles in relation to one another, is positioned between neighbouring cutting edges (10). According to the invention, the cutting surface comprises a bevel (14, 15), which extends along the cutting edge (10). The section of bevel lying in the centre of the cutting edge (10) is broader than the two adjacent bevelled areas on either side, the broader bevel being between 1.5 and 4 times as broad as the breadth of the laterally adjacent bevel.

L'invention concerne une plaquette de coupe servant à usiner une pièce par enlèvement de copeaux. Cette plaquette comprend plusieurs arêtes coupantes (10) servant notamment à effectuer un dégrossissage. Un coin coupant courbe ou constitué d'une pluralité de parties d'arêtes courtes linéaires, placées à angle obtus les unes par rapport aux autres, est situé entre deux arêtes coupantes (10) adjacentes. Selon l'invention, la surface d'attaque comporte un chanfrein (14, 15) s'étendant le long de l'arête coupante (10) et présentant, au milieu de l'arête coupante (10), une largeur 1,5 à 4 fois supérieure à celle des zones adjacentes des deux côtés.

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