Rotary tool and method for manufacturing machined product
AssigneeKYOCERA Corporation
InventorHiroshi Ogawa
Life of this patent
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Abstract
A rotary tool according to a non-limiting aspect has a body that has a rod shape extending from a first end to a second end and is rotatable about a central axis. The body has a first cutting edge positioned on the first end, a first flute extending from the first cutting edge toward the second end, a second cutting edge being on a side of the second end and on a side of an outer periphery with respect to the first cutting edge and being positioned away from the first cutting edge, and a second flute, extending from the second cutting edge toward the second end and being positioned along the first flute. The second flute has a projecting portion extending from a side of the first end toward a side of the second end.
Claims19
A rotary tool comprising a body that has a rod shape extending from a first end to a second end and is rotatable about a central axis, wherein
- the body comprises:
- one or more first cutting edges positioned on a side of the first end;
- one or more first flutes extending from the first cutting edges toward the second end;
- one or more second cutting edges positioned on a side of the second end away from the first cutting edges and positioned on a side of an outer periphery of the body with respect to the first cutting edges;
- and
- one or more second flutes extending from the second cutting edges toward the second end and positioned along the first flutes, and
- at least one of the second flutes comprise a projecting portion extending from a side of the first end toward a side of the second end,
- the projecting portion is located inward of the outer periphery of the body at a cross-section orthogonal to the central axis, and
- an end portion of the projecting portion on the side of the second end is located closer to the second end than an end portion of the second cutting edge on the side of the second end.
A rotary tool comprising:
- a body having a rod shape, extending from a first end to a second end, being rotatable about a central axis, and comprising:
- one or more first cutting edges positioned on a side of the first end;
- one or more first flutes extending from the first cutting edges toward the second end;
- one or more second cutting edges located closer to the second end than the first cutting edges, farther from the central axis than the first cutting edge, and separated from the first cutting edges;
- and
- one or more second flutes extending from the second cutting edges toward the second end and positioned along the first flutes, wherein
- at least one of the second flutes comprise a projecting portion extending along the first flutes,
- the projecting portion is located inward of an outer periphery of the body at a cross-section orthogonal to the central axis, and
- an end portion of the projecting portion on a side of the second end is located closer to the second end than an end portion of the second cutting edge on the side of the second end.
Dependencies are inferred from the claim text.