Cutting insert, rotary tool, and method for manufacturing machined product
AssigneeKYOCERA Corporation
InventorKouji Kawashima
Life of this patent
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Abstract
A rotary tool according to an aspect includes a body, a flank face positioned at a side of a tip end of the body, a flute extending from the flank face toward a rear end of the body, and a ridge line positioned at an intersection of the flank face and the flute. The ridge line includes a recessed portion recessed toward the rear end of the body, an inner edge extending from the recessed portion toward the tip end of the body, and an outer edge extending from the recessed portion toward an outer periphery of the body. The flute includes a recessed groove extending along the outer edge. The recessed groove is connected to the recessed portion and the outer edge, and is separated from the inner edge.
Claims14
A cutting insert, comprising:
- a body extending from a first end to a second end along a rotation axis, wherein
- the body comprises
- a first flank face positioned at a side of the first end,
- a first flute extending from the first flank face toward the second end, and
- a first ridge line positioned at an intersection of the first flank face and the first flute,
- the first ridge line comprises
- a first recessed portion recessed toward the second end,
- a first inner edge extending from the first recessed portion toward a center portion of the body through which the rotation axis passes, and
- a first outer edge extending from the first recessed portion toward an outer periphery of the body,
- the first flute comprises
- a first recessed groove extending along the first outer edge,
- the first recessed groove is connected to the first recessed portion and the first outer edge, and is separated from the first inner edge,
- the first recessed groove comprises
- a first surface extending along the first outer edge,
- a second surface positioned closer to the second end than the first surface, the second surface being inclined with respect to the first surface, and
- a first bottom portion positioned between the first surface and the second surface, the first bottom portion being a transition surface between the first surface and the second surface, and
- the first bottom portion becomes closer to the first outer edge as the first bottom portion approaches the outer periphery of the body.
A rotary tool, comprising:
- a body comprising a rotation axis, the body having a rod shape extending from a first end to a second end;
- a first flank face positioned at a side of the first end of the body;
- a first flute extending from the first flank face toward the second end;
- and
- a first ridge line positioned at an intersection of the first flank face and the first flute, wherein
- the first ridge line comprises
- a first recessed portion recessed toward the second end,
- a first inner edge extending from the first recessed portion toward a center portion of the body through which the rotation axis passes, and
- a first outer edge extending from the first recessed portion toward an outer periphery of the body,
- the first flute comprises
- a first recessed groove extending along the first outer edge,
- the first recessed groove is connected to the first recessed portion and the first outer edge, and is separated from the first inner edge,
- the first recessed groove comprises
- a first surface extending along the first outer edge,
- a second surface positioned closer to the second end than the first surface, the second surface being inclined with respect to the first surface, and
- a first bottom portion positioned between the first surface and the second surface, the first bottom portion being a transition surface between the first surface and the second surface, and
- the first bottom portion becomes closer to the first outer edge as the first bottom portion approaches the outer periphery of the body.
Dependencies are inferred from the claim text.