Edge-carrying drill, method for the manufacture of the drill, and drilling tool comprising such a drill
AssigneeSandvik Intellectual Property AB
InventorsÅke Danielsson, Bengt Silver
Life of this patent
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Abstract
In a first aspect, the invention relates to an edge-carrying drill body (1) of the type that is intended for deep hole drilling, and which is rotatable around a geometric axis (C) as well as comprises a through channel (2) arranged for internal chip evacuation, which channel mouths in front and rear ends of the body. Characteristic of the invention is that one or more cutting edges (4) are made integrally with the rest of the body, more precisely from a hard material, such as cemented carbide or CERMET. In a second aspect, the invention also relates to a method for the manufacture of such a drill body. In a third aspect, the invention furthermore relates to a drilling tool for deep hole drilling.
Claims13
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.
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 shaft including a male screw thread connecting the shaft to the tube, and the screw thread being interrupted along circumferentially spaced portions to form thread-free formations, and 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.
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;
- a bridge bridging over a front mouth of the through-channel to divide the mouth into a plurality of chip inlet openings;
- and
- a cutting edge disposed behind each of the plurality of inlet openings 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, each cutting edge extending from a centering tip disposed on the axis to an outer periphery of the front head.
A deep-hole drilling tool comprising:
- a drill body defining a center axis of rotation and including:
- a front head and a rearwardly extending hollow shaft, 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;
- and
- a tube detachably connected to the hollow shaft of the drill body.
Dependencies are inferred from the claim text.