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US 11,135,659 B2Granted
Cutting tool holder, cutting tool, and method of manufacturing machined product
AssigneeKYOCERA Corporation
InventorShouhei Mao
Life of this patent
Estimating the term…
Abstract
A cutting tool holder of the present disclosure includes a bar-shaped main body. The main body includes a first pocket to receive a first insert, a second pocket to receive a second insert, a first groove extending from the first pocket, and a second groove extending from the second pocket. The first groove includes a second opening located on a rear side in a rotation direction, and the second groove includes a fourth opening located on a rear side in the rotation direction in a cross section orthogonal to a rotation axis. An angle θ1 formed by the second opening and an outer peripheral surface of the main body is smaller than an angle θ2 formed by the fourth opening and the outer peripheral surface of the main body in a cross section orthogonal to the rotation axis.
Claims14
A cutting tool holder, comprising:
- a bar-shaped main body extending from a first end of the bar-shaped main body toward a second end of the bar-shaped main body along a rotation axis, wherein
- the bar-shaped main body comprises:
- an outer peripheral surface,
- a first pocket located at the first end and configured to receive a first insert,
- a second pocket located at the first end and farther away from the rotation axis than the first pocket, the second pocket configured to receive a second insert,
- a first groove spirally extending from the first pocket toward the second end, and
- a second groove spirally extending from the second pocket toward the second end;
- the first groove, in a cross-section orthogonal to the rotation axis, comprises:
- a first opening located on a front side of the first groove in a rotation direction of the rotation axis,
- a second opening located on a rear side of the first groove in the rotation direction,
- a first region having a concave curvilinear shape, and
- a second region being continuous with the first region and extending from the first region as a straight line shape from the first region, on a rear side in the rotation direction;
- the second groove, in the cross-section, comprises:
- a third opening located on a front side of the second groove in the rotation direction,
- a fourth opening located on a rear side of the second groove in the rotation direction,
- a third region having a concave curvilinear shape, and
- a fourth region located at the fourth opening, the fourth region being continuous with the third region and extending tangentially as a straight line shape from the third region to the outer peripheral surface, on a rear side in the rotation direction;
- and
- an angle θ1 formed by the second opening of the first groove and the outer peripheral surface is smaller than an angle θ2 formed by the fourth opening of the second groove and the outer peripheral surface, in the cross-section.
16 more elements
A cutting tool holder, comprising:
- a bar-shaped main body extending from a first end of the bar-shaped main body toward a second end of the bar-shaped main body along a rotation axis, wherein
- the bar-shaped main body comprises:
- an outer peripheral surface,
- a first pocket located at the first end and configured to receive a first insert,
- a second pocket located at the first end and farther away from the rotation axis than the first pocket, the second pocket configured to receive a second insert,
- a first groove spirally extending from the first pocket toward the second end, the first groove beginning at a point located closer to the second end than the first pocket, and
- a second groove spirally extending from the second pocket toward the second end, the second groove beginning at a point located closer to the second end than the second pocket;
- the first groove, in a cross-section orthogonal to the rotation axis, comprises:
- a first opening located on a front side of the first groove in a rotation direction of the rotation axis,
- a second opening located on a rear side of the first groove in the rotation direction,
- a first region having a concave curvilinear shape, and
- a second region being continuous with the first region and extending from the first region as a straight line shape from the first region, on a rear side in the rotation direction;
- the second groove, in the cross-section, comprises:
- a third opening located on a front side of the second groove in the rotation direction,
- a fourth opening located on a rear side of the second groove in the rotation direction,
- a third region having a concave curvilinear shape, and
- a fourth region located at the fourth opening, the fourth region being continuous with the third region and extending tangentially as a straight line shape from the third region to the outer peripheral surface, on a rear side in the rotation direction;
- and
- an angle θ1 formed by the second opening of the first groove and the outer peripheral surface is smaller than an angle θ2 formed by the fourth opening of the second groove and the outer peripheral surface, in the cross-section.
16 more elements
Dependencies are inferred from the claim text.