Cutting insert

B - Operations – Transporting – 23 – C

Patent

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Details

B23C 5/20 (2006.01)

Patent

CA 2609758

The invention relates to a cutting insert for clamping into a disc-type or strip-shaped tool body, in particular, for milling crankshafts, whereby said insert is substantially cuboid-shaped and has two front faces, the distance between which defines the width (4) of the cutting insert, two side faces, serving as cutting faces (6) and the distance between which determines the thickness (3) of the cutting insert as well as an upper and a lower side face (5), whereby a convex face (1) is arranged between the front faces and the upper and lower side faces, so that the upper and lower side faces and the convex face form cutting edges (7) each with a side face, which terminate laterally in cutting corners. According to said invention, the cutting insert is characterised in that an inwardly-tapered face (2) adjoins the convex face, which allows the cutting edge to protrude, tapered chamfers (13, 14) are provided between the inwardly-tapered faces (2) of the front face on both sides of a planar supporting surface to the outer edge and the width and the thickness of the cutting insert vary from each other by a maximum of 20 % and preferably have identical lengths.

L'invention concerne un insert à monter dans un corps d'outil en forme de disque ou de baguette, notamment de fraises d'arbres-manivelles. Cet insert est sensiblement carré et a deux faces frontales dont la distance définit la largeur (4) de l'insert, deux faces latérales servant de faces de coupe (6) et dont la distance détermine l'épaisseur (3) de l'insert et une face supérieure et une face inférieure (5). Une face frontale convexe (1) est respectivement placée entre les faces frontales et la face supérieure et la face inférieure de telle façon que les faces latérales supérieure et inférieure et la face frontale convexe forment respectivement avec une face latérale des arêtes de coupe (7) qui se terminent sur les côtés en angles coupants. Selon l'invention, l'insert de coupe est caractérisé en ce qu'une face (2) tombant vers l'intérieur prolonge la face frontale convexe, laissant saillants les angles coupants, ; en ce que des chanfreins (13, 14) sont prévus entre les faces (2), tombant vers l'intérieur, de la face frontale des deux côtés d'une face support (7) plane tombant vers l'arête externe, et en ce que la largeur et l'épaisseur de l'insert de coupe ont une différence maximale de 20 % et, de préférence, des longueurs identiques.

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