Vibration dampened drilling tool
AssigneeSandvik Aktiebolag
InventorsMarie-Louise Bergholt, Leif Karlsson, Tommy Tukala
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Abstract
The invention relates to a drilling tool for hole-drilling in metallic materials, including a drill body (11) as well as at least one cutting insert (12) located in the front end thereof, defining the periphery of the drill, the drill body having a number of axially extending chip channels (14, 15) and bars (16, 17) situated therebetween. Characteristic of the new tool is that the drill body (11) has been provided with a damping unit (18) situated at an axial distance behind the cutting inserts in at least one chip channel which damping unit entirely or partly fills up a portion of said chip channel, and which damping unit is composed of two material portions (18a, 18b, 23a, 23b) made up of different rigidities.
Claims13
Drilling tool for hole-drilling in metallic materials, including a drill body (11) as well as at least one cutting insert (12) located in the front end thereof defining the periphery of the drill, the drill body having a number of axially extending chip channels (14, 15) and bars (16, 17) situated therebetween, characterized in that the drill body (11) has been provided with a first damping element (18) situated at an axial distance behind the cutting inserts of the drill body and a second damping elements situated in a gap radially inside said first damping element, said damping elements being composed of two material portions (18a, 18b, 23a, 23b) made up of different rigidities.
Dependencies are inferred from the claim text.