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US 12,734,585 B2Granted
Cutting insert, cutting tool, and method for manufacturing machined product
AssigneeKYOCERA Corporation
InventorsShosei Goto, Takuya Ishida
Life of this patent
Estimating the term…
Abstract
An insert includes an upper surface, a lower surface, lateral surfaces, a cutting edge, and a through hole. The upper surface includes a first corner having a protruding curve shape and a first side and a second side extending from the first corner. A first region of a first lateral surface has a recessed shape recessed toward an axis. The upper surface further includes a recessed portion that is located between the second side and the axis and is recessed toward the axis. An entirety of the recessed portion is located farther from the first corner than an entirety of the first region in a direction along the axis.
Claims10
A cutting insert, comprising:
- an upper surface comprising
- a first corner having a protruding curve shape, and
- a first side and a second side extending from the first corner;
- a lower surface located on an opposite side to the upper surface;
- lateral surfaces located between the upper surface and the lower surface;
- a cutting edge located on the first corner and the first side;
- and
- a through hole that opens in the upper surface and the lower surface, wherein
- the lateral surfaces comprise:
- a first lateral surface extending from the first side to the lower surface;
- and
- a second lateral surface extending from the second side to the lower surface,
- in a front view of the upper surface, a virtual straight line passing through a front end of the first corner and extending in a major axis direction of the upper surface is referred to as an axis,
- the first lateral surface comprises:
- a first region that has a recessed shape recessed toward the axis;
- and
- a second region that is flat and is located farther from the first corner than the first region,
- the upper surface further comprises a recessed portion that is located between the second side and the axis and is recessed toward the axis in the front view of the upper surface,
- an entirety of the recessed portion is located farther from the first corner than an entirety of the first region in a direction along the axis, and
- the second lateral surface has a shape asymmetrical to that of the first lateral surface with respect to the axis.
17 more elements
A cutting insert, comprising:
- an upper surface comprising
- a first corner having a protruding curve shape, and
- a first side and a second side extending from the first corner;
- a lower surface located on an opposite side to the upper surface;
- lateral surfaces located between the upper surface and the lower surface;
- a cutting edge located on the first corner and the first side;
- and
- a through hole that opens in the upper surface and the lower surface, wherein
- the lateral surfaces comprise:
- a first lateral surface extending from the first side to the lower surface;
- and
- a second lateral surface extending from the second side to the lower surface,
- in a front view of the upper surface, a virtual straight line passing through a front end of the first corner and extending in a major axis direction of the upper surface is referred to as an axis,
- the first lateral surface comprises:
- a first region that has a recessed shape recessed toward the axis;
- and
- a second region that is flat and is located farther from the first corner than the first region,
- the upper surface further comprises a recessed portion that is located between the second side and the axis and is recessed toward the axis in the front view of the upper surface,
- an entirety of the recessed portion is located farther from the first corner than an entirety of the first region in a direction along the axis,
- the first side comprises:
- a first section having a recessed shape located along the first region;
- and
- a second section having a linear shape located along the second region,
- the first section comprises, in the front view of the upper surface:
- a first portion having a linear shape connected to the first corner;
- a second portion having a protruding curve shape connected to the second section;
- and
- a third portion having a recessed curve shape located between the first portion and the second portion,
- in the front view of the upper surface, a radius of curvature of the first corner having the protruding curve shape is defined as a first radius of curvature, a radius of curvature of the second portion having the protruding curve shape is defined as a second radius of curvature, and a radius of curvature of the third portion having the recessed curve shape is defined as a third radius of curvature, and
- the first radius of curvature is larger than the second radius of curvature, and the third radius of curvature is larger than the first radius of curvature.
27 more elements
A cutting insert, comprising:
- an upper surface comprising
- a first corner having a protruding curve shape, and
- a first side and a second side extending from the first corner;
- a lower surface located on an opposite side to the upper surface;
- lateral surfaces located between the upper surface and the lower surface;
- a cutting edge located on the first corner and the first side;
- and
- a through hole that opens in the upper surface and the lower surface, wherein
- the lateral surfaces comprise:
- a first lateral surface extending from the first side to the lower surface;
- and
- a second lateral surface extending from the second side to the lower surface,
- in a front view of the upper surface, a virtual straight line passing through a front end of the first corner and extending in a major axis direction of the upper surface is referred to as an axis,
- the first lateral surface comprises:
- a first region that has a recessed shape recessed toward the axis;
- and
- a second region that is flat and is located farther from the first corner than the first region,
- the upper surface further comprises a recessed portion that is located between the second side and the axis and is recessed toward the axis in the front view of the upper surface,
- an entirety of the recessed portion is located farther from the first corner than an entirety of the first region in a direction along the axis,
- the first side comprises:
- a first section having a recessed shape located along the first region;
- and
- a second section having a linear shape located along the second region,
- the first section comprises, in the front view of the upper surface:
- a first portion having a linear shape connected to the first corner;
- a second portion having a protruding curve shape connected to the second section;
- and
- a third portion having a recessed curve shape located between the first portion and the second portion,
- the first section further comprises a fourth portion having a linear shape located between the second portion and the third portion, and
- in the front view of the upper surface,
- an inclination angle of the first portion with respect to the axis is smaller than an inclination angle of the second side with respect to the axis,
- an inclination angle of the fourth portion with respect to the axis is larger than the inclination angle of the second side with respect to the axis, and
- an inclination angle of the second section with respect to the axis is identical to the inclination angle of the second side with respect to the axis.
30 more elements
Dependencies are inferred from the claim text.