Retention knob for tool holder

B - Operations – Transporting – 23 – Q

Patent

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Details

B23Q 3/12 (2006.01)

Patent

CA 2753078

A retention knob for use with a tool holder that is less prone to distorting a tapered tool holder surface, especially if it is over- tightened. The retention knob includes a knob head, a flange engageable with an end of a tool holder shank, a pilot segment receivable by the counter bore defined by said tool holder shank and a threaded segment spaced from said flange by an undercut segment. The threaded segment is configured so that it has a length that is substantially the minimum length required to achieve maximum thread holding strength. The undercut segment is configured to space the threaded segment from its head so that a distal end of the threaded segment is substantially near the bottom of the tapered bore forming part of the tool holder.

L'invention porte sur un bouton de retenue destiné à être utilisé avec un porte-outil qui est moins susceptible de distordre une surface de porte-outil effilée, en particulier s'il est serré de façon excessive. Le bouton de retenue comprend une tête de bouton, un rebord apte à venir en prise avec une extrémité d'une cuve de porte-outil, un segment pilote apte à être reçu par contre-alésage défini par ladite cuve de porte-outil et un segment fileté espacé dudit rebord par un segment en contre-dépouille. Le segment fileté est configuré de telle sorte qu'il a une longueur qui est sensiblement la longueur minimale requise pour obtenir une résistance de maintien par filetage maximale. Le segment en contre-dépouille est configuré pour espacer le segment fileté de sa tête de telle sorte qu'une extrémité distale du segment fileté est sensiblement proche de la partie inférieure de la partie formant alliage effilée du porte-outil.

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