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US 10,952,746 B2Granted
Method for producing a cutting tool, and cutting tool
AssigneeKennametal Inc.
InventorsTim Guter, Jürgen Schwägerl
Life of this patent
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Abstract
A method for producing a cutting tool, in particular a drill bit, is specified wherein the cutting tool has a front end (F) at the front and a rear end (R) toward the rear, wherein a tool tip is formed on the front end (F), a point thinning is ground at the tool tip with a grinding tool, the point thinning being ground to be narrower toward the front than toward the rear. The point thinning is ground with a constant point thinning angle (AW). Furthermore, a corresponding cutting tool is specified.
Claims16
A cutting tool comprising a drill bit
- having a front end (F) and a rear end (R),
- wherein a tool tip is formed at the front end (F),
- wherein a point thinning is ground at the tool tip with a constant point-thinning angle (AW) using a grinding tool,
- wherein, as measured at a constant distance from the base, the point thinning is ground to be narrower toward the front end than toward the rear end, and
- wherein the point thinning has a U-like profile in the cross-section orthogonal to the grinding direction (S), with two side walls connected to a base by two curvature radii (R1),
- wherein the two curvature radii (R1) coincide at the front end, and
- wherein a spacing between the two curvature radii (R1) increases as a function of distance from the front end from such that the base widens as a function of distance from the front end.
4 more elements
A cutting tool comprising a drill bit having a front end (F) and a rear end (R),
- wherein a tool tip is formed at the front end (F),
- wherein a point thinning is ground at the tool tip with a constant point-thinning angle (AW) using a grinding tool,
- wherein the point thinning has a base,
- wherein, as measured at a constant distance from the base, the point thinning is ground to be narrower toward the front end than toward the rear end, and
- wherein the point thinning is formed as a semicircular recess, and the base has a curvature radius (R1) which increases from the front end to the rear end.
2 more elements
Dependencies are inferred from the claim text.