Damping insert for tool holder
OwnerHarold D. Cook, Steven M. Ormeinventors
Life of this patent
Estimating the term…
Abstract
A tool holder for a cutting and/or milling machine includes a shank portion configured to be attached to a spindle of the cutting and/or milling machine for mounting the tool holder, and a tool mounting portion for mounting a tool to the tool holder. The tool holder includes a cavity through the shank portion and/or the mounting portion, the cavity being aligned to the rotation axis of the tool holder. The tool holder includes a damping material disposed within the cavity for mitigating harmonic resonance during operation of the cutting and/or milling machine. The damping member may be used in all types and configurations of tool holders.
Claims31
A tool holder for a cutting and milling machine having a spindle, the holder comprising:
- a body defining a shank portion configured to be attached to the spindle for mounting the tool holder to the cutting and milling machine and a tool mounting portion for mounting a tool to the tool holder, the body having a cavity through one or more of the shank portion and the mounting portion, the cavity being aligned to a rotation axis of the body;
- and
- a damping material disposed within the cavity for mitigating harmonic resonance during operation of the cutting and milling machine.
A tool holder for a cutting and milling machine having a spindle, the holder comprising:
- a first segment defining a shank portion attachable to the spindle for mounting the tool holder to the cutting and milling machine and a stub portion, the first segment having an optional first central cavity through one or more of the shank portion and the stub portion, the optional first central cavity being aligned to a rotation axis of the first segment;
- a tool mounting sleeve attachable to the stub portion of the first segment, the tool mounting sleeve having an optional second central cavity;
- and a damping material disposed within at least one of the first and second central cavities for mitigating vibration during operation of the cutting machine.
A method of mounting a tool to a tool holder having a damping material, the method comprising the steps of:
- providing the tool holder with an aperture for mounting the tool, the tool holder having a damping material aligned to a rotation axis of a body of the tool holder;
- heating a local area of the tool mounting portion away from the damping material for enlarging the aperture to insert the tool into the aperture wherein the heat does not affect stability of the damping material;
- inserting the tool into the local area of the tool mounting portion;
- and
- cooling the local area so that the local area of the tool body contracts and frictionally engages the tool.
A method of forming a damping material within a central aperture of a tool holder, the method comprising the steps of:
- forming coolant channels on walls defining the central aperture;
- inserting elongate rods into the formed coolant channels;
- disposing a damping material into the central aperture;
- and
- removing the elongate rods from the formed coolant channels.
Dependencies are inferred from the claim text.