Perforating device

B - Operations – Transporting – 23 – B

Patent

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Details

B23B 47/34 (2006.01)

Patent

CA 2622795

The invention concerns a perforating device comprising a cutting tool (10), means for rotating (11) the cutting tool (10) and means for translating (12, 14) the cutting tool (10), the ratio between the rotational speed and the translational speed being variable during rotation of the cutting tool (10). It comprises a gear train (16, 17; 18, 19) for synchronizing the rotating means (11) with the translating means (12, 14). The speed ratio between a driving pinion (16; 18) of the gear train, secured in rotation to the rotating means (11) of the cutting tool (10) and a transmission pinion (17; 19) of the translating means is reversed at least once during one rotation of the cutting tool (10). The invention is useful for fragmenting the formed shavings.

Un dispositif de perçage comprend un outil de coupe (10), des moyens d'entraînement en rotation (11 ) de l'outil de coupe (10) et des moyens d'entraînement en translation (12, 14) de l'outil de coupe (10), le rapport entre la vitesse de rotation et la vitesse de translation étant variable pendant la rotation de l'outil de coupe (10). II comprend un train d'engrenage (16, 17 ; 18, 19) adapté à synchroniser les moyens d'entraînement en rotation (11 ) aux moyens d'entraînement en translation (12, 14). Le rapport de vitesse entre un pignon d'entraînement (16 ; 18) du train d'engrenage, lié en rotation aux moyens d'entraînement en rotation (11 ) de l'outil de coupe (10) et un pignon de transmission (17 ; 19) des moyens d'entraînement en translation est inversé au moins une fois pendant une rotation de l'outil de coupe (10). Utilisation pour fragmenter les copeaux formés.

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