Hole cutter

B - Operations – Transporting – 23 – B

Patent

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Details

B23B 41/00 (2006.01) B23B 51/04 (2006.01)

Patent

CA 2189930

A hole cutter having a body provided with first and second types of cutting teeth. The cutter facilitates the discharge of cutting chips during machining of a workpiece. The tooth depth of the left and right sections of each of the second type of teeth is smaller than that of the left and right sections of each of the first type of teeth. The tooth depth of the middle section of each tooth of the second type is greater than that of the middle section of each tooth of the first type. A linear flattening section is provided at the middle portion of a second blade edge of each tooth of the second type. The flattening section causes each cutting chip to be shaped in a strip-like manner when removed from the workpiece. This separates the ends of the cutting chips from each other and prevents the chips from becoming entangled to one another.

oupe-trou constitué d'un corps portant deux types de dents. Le coupe-trou facilite l'élimination des fragments au cours de l'usinage de la pièce à produire. La profondeur des dents des parties gauche et droite de chacune des dents du second type est inférieure à celle des parties gauche et droite de chacune des dents du premier type. La profondeur des dents dans la partie centrale de chacune des dents du second type est supérieure à celle de la partie centrale de chacune des dents du premier type. Un segment d'aplanissement linéaire est prévu dans la partie centrale d'une seconde arête de lame de chacune des dents du second type. La partie aplanie fait en sorte que tous les fragments de coupe ont une forme de bande lorsqu'ils sont enlevés de la pièce à produire. Cette méthode sépare les extrémités des fragments de coupe les uns des autres et empêche les fragments de s'entremêler.

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