Thread milling tool
AssigneeKennametal Inc.
InventorRichard D. Kienzle
Life of this patent
Estimating the term…
Abstract
A thread milling tool includes a proximal shank portion and a distal cutting portion. The cutting portion includes at least one thread milling tooth and at least one flute oriented helically, or spirally, about a central rotational axis of the tool. The cutting portion may be configured to form internal or external threads in a workpiece as the cutting portion moves relative to the workpiece. The teeth of the thread milling tool have a negative taper angle or back taper to offset deflection of the tool during milling operations.
Claims22
A thread milling tool comprising:
- a shank portion;
- a cutting portion including at least one helically oriented flute defined by a helix angle less than 40 degrees and a plurality of thread milling teeth,
- wherein said plurality of thread milling teeth define a back taper, and
- wherein said back taper is in a range between about 0.0005 inches to about 0.010 inches in length of cut.
A method of making a thread milling tool, comprising:
- forming a shank portion;
- forming a cutting portion including at least one helically oriented flute defined by a helix angle less than 40 degrees and a plurality of thread milling teeth, whereby said plurality of thread milling teeth define a back taper, and whereby said back taper is in a range between about 0.0005 inches to about 0.010 inches in length of cut.
A method of making a thread milling tool, comprising:
- forming a shank portion;
- a cutting portion including at least one helically oriented flute and a plurality of thread milling teeth, wherein said plurality of thread milling teeth define a back taper in a rabge between about 0.0005 inches to about 0.010 inches in length of cut.
A method of making a thread milling tool, comprising:
- forming a shank portion;
- forming a cutting portion including at least one helically oriented flute and a plurality of thread milling teeth, whereby said plurality of thread milling teeth define a back taper in a range between about 0.0005 inches to about 0.010 inches in length of cut.
Dependencies are inferred from the claim text.