Milling cutter

B - Operations – Transporting – 23 – C

Patent

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Details

B23C 5/22 (2006.01) B23C 5/00 (2006.01) B23C 5/28 (2006.01)

Patent

CA 2183423

A milling cutter substantially comprises the base body and support bodies which are distributed over the surface of the latter and are intended for cutting plates made of a hard cutting material. The end face of the base body comprises a central area and a peripheral area surrounding the latter annularly. The height of the peripheral area projects beyond the height of the central area such that there is formed between the two areas a step which annularly surrounds the axis of rotation. At their base, the support bodies comprise a counter-step which cooperates in interlocking manner with the base member step. The counter-step is tensioned against the end face of the base member. A mounting plate is disposed at the end face of the base body and, by means of grooves which are disposed on the periphery of said mounting plate and which are open approximately radially outwards, embraces the support bodies at the sides and the rear, in a substantially interlocking manner. A particularly high degree of accuracy in terms of concentricity is thereby ensured even when the milling cutter rotates at high peripheral speeds.

L'invention a pour objet une fraise comportant principalement un élément de base (3) à la périphérie duquel sont répartis des supports (4) destinés à des plaquettes (5) réalisées dans un matériau de coupe rigide. La face frontale de l'élément de base (3) comprend une surface centrale (8) ainsi qu'une surface périphérique (9) entourant cette dernière de façon annulaire. La surface périphérique (9) se situe à un niveau supérieur à celui de la surface centrale (8) de sorte qu'un épaulement (6), entourant de façon annulaire l'axe de rotation (1), est formé entre les deux surfaces (8, 9). Les supports (4) présentent à leur base (11) un contre-épaulement (12) coopérant par liaison de forme avec la marche (6) de l'élément de base. Ce contre-épaulement (12) est vissé contre la face frontale de l'élément de base (3). Une plaque de maintien (15) est placée sur la face frontale de l'élément de base (3). Cette plaque comprend sur ses faces latérales et arrière les supports (4) assemblés pratiquement par liaison de forme au moyen de gorges ouvertes vers l'extérieur de façon approximativement radiale et disposées à sa périphérie (41). Ceci permet d'obtenir une précision de concentricité particulièrement bonne, même lorsque la fraise tourne à des vitesses périphériques élevées.

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