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US 11,465,216 B1Granted
Tool holder with stress fit rods
AssigneeTechniks, LLC
InventorScott Worthington
Life of this patent
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Abstract
A tool holding section opposite the first section with a bore formed in the tool holding section adapted for receiving the shank of the tool. A plurality of stress rods positioned around the bore and comprising a thermal rate of expansion less than a thermal rate of expansion of the tool holding section. The plurality of stress rods form corresponding bulges on the surface of the bore to decrease the inner diameter of the bore to mechanically lock the shank of the tool in the bore.
Claims10
A tool holder for holding a tool having a shank with an outer diameter, the tool holder comprising:
- a first section adapted to be connected to a machining center;
- a tool holding section opposite the first section;
- a bore formed in the tool holding section adapted for receiving the shank of the tool;
- a surface of the bore defining an inner diameter of the bore;
- a plurality of holes positioned around the bore;
- a plurality of stress rods each of which comprise a diameter larger than a diameter of a hole of the plurality of holes and each one of which is positioned in a corresponding one of the plurality of holes around the bore and comprising a thermal rate of expansion less than a thermal rate of expansion of the tool holding section so that the stress rods are fixed in the tool holding section of the tool holder and cause elastic deformation of the surface of the bore, wherein the plurality of stress rods form corresponding bulges on the surface of the bore to decrease the inner diameter of the bore to mechanically lock the shank of the tool in the bore.
3 more elements
Dependencies are inferred from the claim text.