Drilling tool with a cutting element that is configured as a plate or head
AssigneeRobert Bosch GmbH
InventorsBernhard Moser, Rainer Widmann
Life of this patent
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Abstract
The invention relates to a drilling tool, especially for percussion drilling, which comprises a cutting element (3) that is configured as a plate (3) or head and that has at least one cutting edge (11) defined by a cutting face (6) and a free face (10). The cutting edge (11) is associated with a first free face section (10a) which is limited in a cutting plane at a right angle to the cutting edge (11) and parallel to the longitudinal axis (L) of the drilling tool (1) by a convex bulge (13) or a convex polygon outline. The vertical height of a rib (14) defined by the first free face section (10a) and an associated first cutting face section (6a) ranges from 0.1 mm to 1.0 mm.
Claims10
A drilling tool (1) for percussion drilling, which comprises a cutting element (3) that is configured as a plate (3) or head and that has at least one cutting edge (11) defined by a cutting face (6) and a free face (10),
- wherein the cutting edge (11) is associated with a first free face section (10a) which lies in a cutting plane (CP) and is followed by a second free face section (10b), wherein the cutting plane (CP) is cut at a right angle to the cutting edge (11) and wherein the first free face section (10a) is convex and is limited by a convex bulge (13) or a convex polygon outline (15), while the second free face section (10b) is straight, wherein a rib (14) is defined by the first free face section (10a) and an associated first cutting face section (6a), wherein a vertical height (H) of said rib (14) ranges from 0.1 mm to 1.0 mm, wherein
- an extension (V) of the second free face section (10b) extends in a direction of rotation (d) of the drilling tool (1) through the cutting element (3) below the cutting edge (11), and wherein said extension (V) defines an intersection and dividing line between the first free face section (10a) and the second free face section (10b).
A drilling tool (1) for percussion drilling, which comprises a cutting element (3) that is configured as a plate (3) or head and that has at least one cutting edge (11) defined by a cutting face (6) and a free face (10),
- wherein the cutting edge (11) is associated with a first free face section (10a) which lies in a cutting plane (CP) and is followed by a second free face section (10b), wherein the cutting plane (CP) is cut at a right angle to the cutting edge (11) and wherein the first free face section (10a) is convex and is limited by a convex bulge (13) or a convex polygon outline (15), while the second free face section (10b) is straight, wherein a rib (14) is defined by the first free face section (10a) and an associated first cutting face section (6a), and wherein a vertical height (H) of the rib (14) ranges from 0.1 mm to 0.5 mm.
A drilling tool (1) for percussion drilling, which comprises a cutting element (3) that is configured as a plate (3) or head and that has at least one cutting edge (11) defined by a cutting face (6) and a free face (10),
- wherein the cutting edge (11) is associated with a first free face section (10a) which lies in a cutting plane (CP) and is followed by a second free face section (10b), wherein the cutting plane (CP) is cut at a right angle to the cutting edge (11) and wherein the first free face section (10a) is convex and is limited by a convex bulge (13) or a convex polygon outline (15), while the second free face section (10b) is straight, wherein a rib (14) is defined by the first free face section (10a) and an associated first cutting face section (6a), wherein a vertical height (H) of the rib (14) ranges from 0.1 mm to 0.5 mm,
- wherein the vertical height (H) is a distance between a first plane (P) and a second plane (E), wherein said first plane (P) extends perpendicular to a longitudinal axis (L) and is parallel with the second plane (E), and wherein the first plane (P) intersects the cutting element (3) at a transition of the first free face section (10a) into the second free face section (10b), and wherein the second plane (E) is cut by said cutting edge (11).
A drilling tool (1) for percussion drilling, which comprises a cutting element (3) that is configured as a plate (3) or head and that has at least one cutting edge (11) defined by a cutting face (6) and a free face (10),
- wherein the cutting edge (11) is associated with a first free face section (10a) which lies in a cutting plane (CP) and is followed by a second free face section (10b), wherein the cutting plane (CP) is cut at a right angle to the cutting edge (11) and wherein the first free face section (10a) is convex and is limited by a convex bulge (13) or a convex polygon outline (15), while the second free face section (10b) is straight, wherein a rib (14) is defined by the first free face section (10a) and an associated first cutting face section (6a), wherein a vertical height (H) of said rib (14) ranges from 0.1 mm to 1.0 mm, and wherein the vertical height (H) of the rib (14) increases toward the longitudinal axis (L) of the drilling tool.
A drilling tool (1) for percussion drilling, which comprises a cutting element (3) that is configured as a plate (3) or head and that has at least one cutting edge (11) defined by a cutting face (6) and a free face (10),
- wherein the cutting edge (11) is associated with a first free face section (10a) which lies in a cutting plane (CP) and is followed by a second free face section (10b), wherein the cutting plane (CP) is cut at a right angle to the cutting edge (11) and wherein the first free face section (10a) is convex and is limited by a convex bulge (13) or a convex polygon outline (15), while the second free face section (10b) is straight, wherein a rib (14) is defined by the first free face section (10a) and an associated first cutting face section (6a), wherein a vertical height (H) of said rib (14) ranges from 0.1 mm to 1.0 ram, wherein the vertical height (H) of the rib (14) decreases toward the longitudinal axis (L).
Dependencies are inferred from the claim text.