US 7,320,565 B2
Edge-carrying drill, method for the manufacture of the drill, and drilling tool comprising such a drill
Åke Danielsson, Sandviken (Sweden); and Bengt Silver, Hagersten (Sweden)
Assigned to Sandvik Intellectual Property AB, Sandviken (Sweden)
Filed on May 20, 2004, as Appl. No. 10/849,445.
Claims priority of application No. 0301456 (SE), filed on May 20, 2003.
Prior Publication US 2004/0265080 A1, Dec. 30, 2004
Int. Cl. B23B 41/02 (2006.01)
U.S. Cl. 408—144  [408/227; 408/705; 408/83] 13 Claims
OG exemplary drawing
 
1. A drill body for chip-removing metal machining, the drill body defining a center axis of rotation and comprising:
a front head and a rearwardly extending hollow shaft adapted for connection with a tube, the front head including a first material;
an axial through-channel for internal chip evacuation extending between at least one chip inlet opening in the front head and a chip outlet opening at a rear end of the shaft; and
a cutting edge disposed behind the inlet opening with reference to a direction of rotation of the drill body, the cutting edge including a second material integrally sintered with the first material of the front head.