Thread forming tool with annular ridge
AssigneeSandvik Intellectual Property AB
InventorBjörn Håkansson
Life of this patent
Estimating the term…
Abstract
A thread forming tool includes an elongated body defining a longitudinal center axis. The body including a thread forming portion formed by one or more annular ridges oriented perpendicular to the axis. The body has a non-circular shape in a cross sectional plane oriented perpendicular to the axis at an axial center of the ridge.
Claims9
A thread forming tool comprising an elongated body defining a center longitudinal axis, said body having adjacent a first end, a connector portion and adjacent a second end a thread forming portion, said thread forming portion comprising at least one non-helical annular ridge extending substantially about a circumference of said body, wherein said body has a non-circular shape in a cross-sectional plane oriented perpendicular to said body at an axial center of said at least one annular ridge.
A thread forming tool comprising an elongated body defining a center longitudinal axis, said body having adjacent a first end thereof a connector portion and adjacent a second end thereof a thread forming portion, the thread forming portion comprising at least one non-helical annular ridge extending substantially about a circumference of said body and oriented perpendicular to said axis, wherein said body has a non-circular shape in a cross-sectional plane oriented perpendicular to said body at an axial center of said at least one annular ridge, said non-circular shape including at least three lobes.
A method of forming a thread in a workpiece, said method comprising:
- A) introducing into an opening of the workpiece a thread forming tool comprising at least one non-helical annular ridge extending substantially about a circumference of said body, wherein said body has a non-circular shape in a cross-sectional plane oriented perpendicular to said body at an axial center of said at least one annular ridge, wherein the opening has a diameter larger than a maximum diameter of said tool;
- B) rotating said tool about said axis;
- and
- C) during step B, moving said tool circularly around a circumference of said opening and simultaneously axially into said opening.
Dependencies are inferred from the claim text.