Cylindrical head boring tool

Details Cylindrical head boring tool Cylindrical head boring tool

B - Operations, Transporting

23

B

B23B 51/00 (2006.01) B27G 15/00 (2006.01)

Patent

CA 2227820

A cylindrical head boring tool such as a Forstner drilling tool has a main cutting edge with a centering point. The main cutting edge extends diametrically across the entire circular cross-section of the boring head and has cut out surfaces and chip channels adjacent the main cutting edge. The chip channels open through the outer periphery and extend obliquely through the boring head. Each end of the main cutting edge is adjacent a preliminary cutting edge coinciding with the circumference of the boring head to guide the boring tool. The preliminary cutting edge reaches to the edge of the respective other chip channel and forms the peripheral edge of an essentially cylindrically curved wall of the boring head. The otherwise smooth curved wall is interrupted by radial throats.

Outil d'alésage à tête cylindrique de type Forstner possédant un bord tranchant principal comportant une pointe de centrage. Le bord tranchant principal s'étend sur le diamètre de toute la section circulaire de la tête d'alésage et il comporte des surfaces découpées et des canaux d'enlèvement des copeaux adjacents à l'arête tranchante principale. Les canaux d'enlèvement des copeaux s'ouvrent sur le périmètre extérieur et s'étendent obliquement sur la tête d'alésage. Chaque extrémité du bord tranchant principal est adjacente à un premier bord tranchant qui coïncide avec la circonférence de la tête d'alésage afin de guider l'outil d'alésage. Le premier bord tranchant atteint le bord du canal correspondant d'enlèvement des copeaux et forme le bord périphérique d'une paroi courbe essentiellement cylindrique de la tête d'alésage. La paroi autrement courbe et lisse est percée de gorges radiales.

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