Drill with a drill insert

B - Operations – Transporting – 23 – B

Patent

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Details

B23B 51/04 (2006.01) B23B 51/00 (2006.01) B23B 51/02 (2006.01)

Patent

CA 2202033

A drill bit comprises a drill shaft and a replaceable drill insert. A diametral shaft groove for accommodating the drill insert penetrates the end face of the drill shaft. The drill shaft bears on its periphery chip grooves which extend into the region of the shaft groove and continue into the drill insert. The flanks of the shaft groove are aligned at least partially parallel to one another and to the shaft axis. The drill insert with its side faces corresponding to the groove flanks is clamped in a force-locked manner by an insertion- clamping fit in the shaft groove due to resilient pressure exerted by the groove flanks.

Foret essentiellement constitué par une tige (1) et par une pointe rapportée fabriquée en métal dur massif (3). L'extrémité (2) de la tige (1) est traversée par une rainure diamétrale destinée à recevoir la pointe rapportée (3). La tige (1) porte sur sa périphérie, une rainure de serrage s'étendant dans la zone de la rainure (7) de la tige, et qui se prolonge dans la pointe (3). Les flancs de la rainure (7) sont au moins partiellement, parallèles l'un par rapport à l'autre et par rapport à l'axe (12) de la tige. La pointe rapportée (3) est serrée en force, l'ajustement se faisant avec un serrage par insertion, au niveau de ses faces latérales (13, 14) correspondant aux flancs (10, 11) de la rainure, dans la rainure (7) de la tige, par suite de la pression exercée élastiquement par lesdits flancs (10, 11) de la rainure.

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