Cutting tool for drilling concrete, aggregate or masonry

E - Fixed Constructions – 21 – B

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Details

E21B 10/36 (2006.01) B21K 5/02 (2006.01) B22C 15/02 (2006.01) B23B 31/00 (2006.01) B23B 51/02 (2006.01) E21B 10/44 (2006.01) E21B 10/46 (2006.01)

Patent

CA 2228652

A cutting tool (500) has a longitudinally extending shaft portion (588) with a chucking part (509) and a cutting head (506). A pressed powder cutting insert (518) with a cutting edge (520) is on the cutting head (506). The cutting edge (520) includes at least one cutting portion. A rake surface (524) is formed adjacent to at least one of the cutting portions (520) with the rake face (524) being at a rake angle from about 0° to 10°. A clearance face (526) is formed adjacent to the at least one cutting portion opposite the rake face (524). The clearance face (526) is at a clearance angle from about 10° to 50°. An edge radius (540) between the rake face (524) and the clearance face (526) is at a radius of from about 0.0015 to about 0.004 inch. The edge radius (540) is formed during pressing of the powder to form the insert, thus, enabling the insert to be directly braised into the cutting head (506).

Outil de coupe (500) possédant une partie tige (588) s'étendant dans le sens de la longueur et comportant une partie de serrage (509) et une tête de coupe (506). Une pièce rapportée coupante (518) en poudre métallique comprimée, comportant un bord coupant (520) se trouve sur la tête de coupe (506). Le bord coupant (520) comprend au moins une partie coupante. Une surface de coupe (524) est située contiguë à au moins une des parties coupantes (520) et son angle de coupe est de 0 DEG à 10 DEG . Une face de dépouille (526) est contiguë à la partie coupante au moins située en face de la surface de coupe (524). Cette face de dépouille (526) se situe à un angle de dépouille de 10 DEG à 50 DEG . Un rayon périphérique (540) entre la face de coupe (524) et la face de dépouille est de 0,0015 à 0,004. Ce rayon (540) s'obtient pendant la compression de la poudre métallique servant à constituer la pièce rapportée, ce qui permet d'introduire directement cette dernière dans la tête de coupe (506).

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