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US 11,305,358 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 an upper surface, a side surface, a ridge line including a first ridge line and a second ridge line, and an intersection point. The upper surface includes a top surface region and a rising surface region located between the top surface and the ridge line, and having a shape protruding toward the intersection point. In a top view, a first distance from the first ridge line to the rising surface increases as close to the intersection point, and a second distance from the second ridge line to the rising surface increases as close to the intersection point.
Claims12
A cutting insert extending from a first end toward a second end, and comprising:
- a base portion;
- and
- a cutting portion projecting from the base portion toward the first end, wherein
- the cutting portion comprises:
- an upper surface extending from the base portion toward the first end;
- a side surface connected to the upper surface and comprising:
- a first side surface positioned on a side of the first end;
- and
- a second side surface connected to the first side surface and positioned closer to the second end than the first side surface;
- a ridge line positioned at an intersection of the upper surface and the side surface, and comprising:
- a first ridge line positioned at an intersection of the upper surface and the first side surface;
- and
- a second ridge line positioned at an intersection of the upper surface and the second side surface;
- a first cutting edge positioned at the first ridge line;
- and
- a second cutting edge positioned at the second ridge line;
- and
- an intersection point positioned at an intersection of the first ridge line and the second ridge line,
- the upper surface comprises:
- a top surface region;
- and
- a rising surface region located between the top surface and the ridge line, inclined toward the top surface region as proceeding away from the ridge line, and having a shape protruding toward the intersection point in a top view, and comprising:
- a first region having a planar shape and positioned along the first ridge line;
- a second region having a planar shape and positioned along the second ridge line;
- and
- a third region having a planar shape, positioned between the first region and the second region, positioned along the second ridge, and inclined with respect to the first region and the second region;
- in a cross section parallel to the top surface region, the rising surface comprises:
- a first side ridge line located at the first region,
- a second side ridge line located at the second region, and
- a third side ridge line located at the third region, and
- in the top view,
- a first distance from the first ridge line to the first side ridge line increases as it approaches the intersection point
- a second distance from the second ridge line to the second side ridge line decreases as it approaches the intersection point,
- the third side ridge line is parallel to the second ridge line, and
- a distance from the first side ridge line to the second side ridge line, in the direction from the base portion to the first end, decreases as it approaches the top surface region in a succession of cross sections parallel to the top surface region.
32 more elements
A cutting insert extending from a first end toward a second end, and comprising:
- a base portion;
- and
- a cutting portion projecting from the base portion toward the first end, wherein
- the cutting portion comprises:
- an upper surface extending from the base portion toward the first end;
- a side surface connected to the upper surface and comprising:
- a first side surface positioned on a side of the first end;
- and
- a second side surface connected to the first side surface and positioned closer to the second end than the first surface;
- a ridge line positioned at an intersection of the upper surface and the side surface, and comprising:
- a first ridge line positioned at an intersection of the upper surface and the first side surface;
- and
- a second ridge line positioned at an intersection of the upper surface and the second side surface;
- a first cutting edge positioned at the first ridge line;
- a second cutting edge positioned at the second ridge line;
- and
- an intersection point positioned at an intersection of the first ridge line and the second ridge line,
- the upper surface comprises:
- a top surface region;
- and
- a rising surface region located between the top surface and the ridge line, inclined toward the top surface region as proceeding away from the ridge line, having a shape protruding toward the intersection point in a top view, and comprising:
- a first region having a planar shape and positioned along the first ridge line;
- a second region having a planar shape and positioned along the second ridge line;
- and
- a third region having a planar shape, positioned between the first region and the second region, positioned along the second ridge, and inclined with respect to the first region and the second region;
- in a cross section parallel to the top surface region, the rising surface comprises:
- a first side ridge line located at the first region,
- a second side ridge line located at the second region, and
- a third side ridge line located at the third region,
- in the top view,
- a first distance from the first ridge line to the first side ridge line increases as it approaches the intersection point,
- a second distance from the second ridge line to the second side ridge line decreases as it approaches the intersection point,
- a second angle is formed by a virtual straight line obtained by extending the second side ridge line toward the first end and a virtual straight line obtained by extending the second ridge line, and
- a third angle is formed by a virtual straight line obtained by extending the third side ridge line toward the first end and the virtual straight line obtained by extending the second ridge line,
- the third angle is smaller than the second angle, and
- a distance from the first side ridge line to the second side ridge line, in the direction from the base portion to the first end, decreases as it approaches the top surface region in a succession of cross sections parallel to the top surface region.
33 more elements
Dependencies are inferred from the claim text.