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US 12,521,797 B2Granted
Cutting insert, cutting tool, and method for manufacturing machined product
AssigneeKYOCERA Corporation
InventorYousuke Fukuhara
Life of this patent
Estimating the term…
Abstract
A cutting insert according to an aspect includes a base portion and a cutting portion. The cutting portion includes a front end surface, an top surface, a first lateral surface, a second lateral surface, a front cutting edge, and a lateral cutting edge. The front cutting edge includes a first cutting edge and a second cutting edge, and a radius of curvature of the first cutting edge is greater than a radius of curvature of the second cutting edge.
Claims11
A cutting insert comprising:
- a base portion;
- and
- a cutting portion provided to project from the base portion, wherein
- the cutting portion comprises
- a front end surface positioned closer to a side of a front end in a direction projecting from the base portion,
- a top surface extending from the base portion to the front end surface,
- a first lateral surface extending from the base portion to the front end surface and adjacent to the top surface,
- a second lateral surface extending from the base portion to the front end surface and adjacent to the top surface on the opposite side of the first lateral surface,
- a front cutting edge positioned at an intersection of the top surface and the front end surface, and
- a lateral cutting edge positioned at an intersection of the top surface and the first lateral surface,
- the front cutting edge comprises
- a first cutting edge comprising an end portion closer to the front end of the front cutting edge, and
- a second cutting edge positioned between the first cutting edge and the lateral cutting edge,
- a radius of curvature of the first cutting edge is greater than a radius of curvature of the second cutting edge,
- the top surface comprises a front inclined surface positioned along the front cutting edge and inclined downward as the front inclined surface becomes further away from the front cutting edge,
- the front inclined surface comprises
- a first inclined surface positioned along the first cutting edge, and
- a second inclined surface positioned along the second cutting edge, and
- a second inclination angle of the second inclined surface is larger than a first inclination angle of the first inclined surface.
16 more elements
A cutting insert comprising:
- a base portion;
- and
- a cutting portion provided to project from the base portion, wherein
- the cutting portion comprises
- a front end surface positioned closer to a side of a front end in a direction projecting from the base portion,
- a top surface extending from the base portion to the front end surface,
- a first lateral surface extending from the base portion to the front end surface and adjacent to the top surface,
- a second lateral surface extending from the base portion to the front end surface and adjacent to the top surface on the opposite side of the first lateral surface,
- a front cutting edge positioned at an intersection of the top surface and the front end surface, and
- a lateral cutting edge positioned at an intersection of the top surface and the first lateral surface,
- the front cutting edge comprises
- a first cutting edge comprising an end portion closer to the front end of the front cutting edge, and
- a second cutting edge positioned between the first cutting edge and the lateral cutting edge,
- the top surface comprises a front inclined surface positioned along the front cutting edge and inclined downward as the front inclined surface becomes further away from the front cutting edge,
- the front inclined surface comprises
- a first inclined surface positioned along the first cutting edge and
- a second inclined surface positioned along the second cutting edge, and
- a second inclination angle of the second inclined surface is larger than a first inclination angle of the first inclined surface.
15 more elements
A cutting insert comprising:
- a base portion;
- and
- a cutting portion provided to project from the base portion, wherein
- the cutting portion comprises
- a front end surface positioned closer to a side of a front end in a direction in which the cutting portion projects from the base portion,
- a top surface extending from the base portion to the front end surface,
- a first lateral surface extending from the base portion to the front end surface and adjacent to the top surface,
- a second lateral surface extending from the base portion to the front end surface and adjacent to the top surface on the opposite side of the first lateral surface,
- a front cutting edge positioned at an intersection of the top surface and the front end surface, and
- a lateral cutting edge positioned at an intersection of the top surface and the first lateral surface,
- the front cutting edge comprises
- a first cutting edge located at an end portion farthest from the base portion in the direction in which the cutting portion projects from the base portion,
- a second cutting edge positioned between the first cutting edge and the lateral cutting edge, and
- a third cutting edge extending from the first cutting edge toward the second lateral surface,
- a radius of curvature of the first cutting edge is greater than a radius of curvature of the second cutting edge, and
- the radius of curvature of the second cutting edge is greater than a radius of curvature of the third cutting edge.
13 more elements
Dependencies are inferred from the claim text.