Support pad for drill

Details Support pad for drill Support pad for drill

B - Operations, Transporting

23

B

B23B 29/03 (2006.01) B23B 51/00 (2006.01) B23B 51/04 (2006.01)

Patent

CA 2198370

A drill includes support pads for supporting and guiding the drill in the drill hole. The support pads are foamed as parallelepiped-shaped cemented carbide bodies which each have two wing-shaped protrusions on their longitudinal sides. In a corresponding way, the drill head of the drill includes recesses with two bulged parts on the long sides. This gives the support pad a determined axial position and strengthens the support pad at the weakening caused by the central hole. Further, the support pad can be turned half a revolution if one of its ends becomes damaged since the end spaces do not have to function as abutment surfaces.

Une fraise comporte des blocs d'appui destinés à la maintenir et à la guider dans le trou. Ces blocs d'appui se présentent sous forme de corps parallélépipédiques en carbure cémenté possédant chacun deux saillants en forme d'aile sur leurs côtés longitudinaux. De manière correspondante, la tête de la fraise comporte des évidements avec deux parties bombées sur les côtés longs, ce qui confère au bloc d'appui une position axiale déterminée et le renforce au niveau de la zone de l'affaiblissement provoqué par le trou central. Par ailleurs, le bloc d'appui peut être tourné d'un demi-tour si l'une de ses extrémités vient à être endommagée, puisque les espaces terminaux ne doivent pas faire office de surfaces de butée.

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