Drilling tool
AssigneeSandvik AB
InventorsAke Danielsson, Torsten Blomberg
Life of this patent
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Abstract
A drilling tool for drilling in metals has in its front part cutting insert-carrying cartridges, for instance 3, 5 or 7 in number. The peripheral cartridge (6) carries a peripheral cutting insert (7). This peripheral cartridge is fastened in the drill by a locking screw (16) that extends in a slot (17) in the drillhead. Radially inside of the peripheral cartridge is a wedge (15) which can be displaced axially and thereby regulate the radial position of the peripheral cartridge and cutting insert and, thereby, the cutting diameter. When the desired radial adjustment has been attained, the peripheral cutting insert is fixed by the locking screw (16). In this way, a very exact adjustment of the cutting diameter is obtained.
Claims10
Drilling tool comprising a peripheral cartridge that carries a peripheral cutting insert which determines the cutting diameter, wherein on the radially inner side of the peripheral cartridge is arranged a wedge which can be displaced axially and thereby move the peripheral cartridge radially in order to adjust the cutting diameter, and in that the cartridge is fixed in the desired position by a locking screw which extends in an open slot in the drilling tool and is screwed into a threaded hole in the peripheral cartridge, the slot being angled relative to the radius of the tool and increasing in length radially outwards in order to secure the peripheral cartridge against centrifugal forces.
Dependencies are inferred from the claim text.