Tool for machining a workpiece
AssigneeEMUGE-Werk Richard Glimpel GmbH & Co. KG Fabrik fur Prazisionswerkzeuge
InventorsHelmut Glimpel, Dietmar Hechtle
Life of this patent
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Abstract
The invention relates to a tool for machining a workpiece, which tool is rotatable about a tool axis, having a tool shank and a tool head, which tool head comprises at least one land, at least one spiral point assigned to the land and at least one flute assigned to the land, wherein the flute has a left-hand helix and the spiral point is skewed to the left, or wherein the flute has a right-hand helix and the spiral point is skewed to the right.
Claims26
A tool for machining a workpiece, which tool is rotatable about a tool axis, having a tool shank and a tool head, which tool head comprises at least one land, at least one spiral point assigned to the land and at least one flute assigned to the land, wherein the flute has a left-hand helix and the spiral point is skewed to the left, or wherein the flute has a right-hand helix and the spiral point is skewed to the right;
- wherein a helix angle of the left-hand helix or of the right-hand helix of the flute is between 2° and 15°;
- wherein the spiral point has a spiral point skew of between 5° and 20° skewed to the left or the right;
- wherein the spiral point has a spiral point inclination of between 3° and 15°;
- wherein the land comprises a crest which has a rake angle which is between +30° and −5°;
- and
- wherein the rake angle at the end of the spiral point is between +30° and −5°.
A tool for machining a workpiece, which tool is rotatable about a tool axis, having a tool shank and a tool head, which tool head comprises at least one land, at least one spiral point assigned to the land and at least one flute assigned to the land, wherein the flute has a left-hand helix and the spiral point is skewed to the left, or wherein the flute has a right-hand helix and the spiral point is skewed to the right;
- wherein a helix angle of the left-hand helix or of the right-hand helix of the flute is between 2° and 15°;
- wherein the spiral point has a spiral point skew of between 5° and 20° skewed to the left or the right;
- wherein the spiral point has a spiral point inclination of between 3° and 15°;
- wherein the tool is a tapping tool;
- wherein the tool has a helically running external thread;
- wherein thread crests of the external thread are widened in a first region starting from an end face of the tool head and there are full thread crests in a second region adjoining the first region;
- wherein the widening of the thread crest in the first region decreases towards the second region starting from the end face of the tool head;
- wherein the tool has a third region of thread crest which adjoins the second region and in which the thread crests are widened;
- and
- wherein the widening of the thread crest in the third region increases in a direction of the tool shank starting from the second region.
A tool for machining a workpiece, which tool is rotatable about a tool axis, having a tool shank and a tool head, which tool head comprises at least one land, at least one spiral point assigned to the land and at least one flute assigned to the land, wherein the flute has a left-hand helix and the spiral point is skewed to the left, or wherein the flute has a right-hand helix and the spiral point is skewed to the right;
- wherein a helix angle of the left-hand helix or of the right-hand helix of the flute is between 5° and 7°;
- wherein the spiral point has a spiral point skew of between 8° and 12° skewed to the left or the right;
- wherein the spiral point has a spiral point inclination of between 8° and 10°;
- wherein the land comprises a crest which has a rake angle which is between +30° and −5°;
- wherein the rake angle at the end of the spiral point is between +30° and −5°;
- wherein the tool is a tapping tool;
- wherein the tool has a helically running external thread;
- wherein the thread crests of the external thread are widened in a first region starting from an end face of the tool head and there are full thread crests in a second region adjoining the first region;
- wherein the widening of the thread crest in the first region decreases towards a second region starting from the end face of the tool head;
- wherein the tool has a third region of thread crest which adjoins the second region and in which the thread crests are widened;
- wherein the widening of the thread crest in the third region increases in a direction of the tool shank starting from the second region.
Dependencies are inferred from the claim text.