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US 11,351,617 B2Granted
Rotating tool
AssigneeKYOCERA Corporation
InventorYuusaku Takatake
Life of this patent
Estimating the term…
Abstract
In an aspect, a rotating tool includes a main body having a rod shape and extending along a rotation axis. The main body includes a first end, a second end, a twisted cutting edge located at a side of the first end, a twisted flute, a reverse twisted cutting edge located closer to the second end than the twisted cutting edge, and a reverse twisted flute. The reverse twisted flute is connected to the twisted flute. The twisted cutting edge includes a first part having a length from the rotation axis decreasing as approaching toward the second end.
Claims15
A rotating tool comprising a main body having a rod shape, extending along a rotation axis, and comprising:
- a cutting portion including a first end;
- and
- a shank portion including a second end opposite to the first end;
- wherein
- the cutting portion comprises:
- a twisted cutting edge located at a side of the first end and twisted from a side of the first end toward the second end;
- a twisted flute located at a front of the twisted cutting edge in a rotational direction of the rotation axis and extending along the twisted cutting edge;
- a reverse twisted cutting edge located closer to the second end than the twisted cutting edge and twisted from the side of the first end toward the second end in a direction opposite to the twisted cutting edge;
- and
- a reverse twisted flute located at the front of the reverse twisted cutting edge in the rotational direction and extending along the reverse twisted cutting edge;
- the reverse twisted flute is connected to the twisted flute,
- the twisted cutting edge comprises a first part having a length from the rotation axis decreasing as approaching toward the second end a third part extending from the front end to the first part,
- the first part includes an end part of the twisted cutting edge located at a side of the second end and
- the length from the rotation axis to the third part is constant from a side of the front end toward a side of the rear end.
11 more elements
A rotating tool comprising a main body having a rod shape, extending along a rotation axis, and comprising:
- a cutting portion including a first end;
- and
- a shank portion including a second end opposite to the first end;
- wherein
- the cutting portion comprises:
- a twisted cutting edge located at a side of the first end and twisted from a side of the first end toward the second end;
- a twisted flute located at a front of the twisted cutting edge in a rotational direction of the rotation axis and extending along the twisted cutting edge;
- a reverse twisted cutting edge located closer to the second end than the twisted cutting edge and twisted from the side of the first end toward the second end in a direction opposite to the twisted cutting edge;
- and
- a reverse twisted flute located at the front of the reverse twisted cutting edge in the rotational direction and extending along the reverse twisted cutting edge;
- wherein
- the reverse twisted flute is connected to the twisted flute, and
- the twisted cutting edge comprises a first part having a length from the rotation axis decreasing as approaching toward the second end,
- the first part includes an end part of the twisted cutting edge located at a side of the second end,
- a rotation locus of the first part has a linear shape on a virtual plane which includes the rotation axis, and
- the first part has an angle of 2° to 20° with respect to the rotation axis.
13 more elements
A rotating tool comprising a main body having a rod shape, extending along a rotation axis, and comprising:
- a cutting portion including a first end;
- and
- a shank portion including a second end opposite to the first end;
- wherein
- the cutting portion comprises:
- a twisted cutting edge located at a side of the first end and twisted from a side of the first end toward the second end;
- a twisted flute located at a front of the twisted cutting edge in a rotational direction of the rotation axis and extending along the twisted cutting edge;
- a reverse twisted cutting edge located closer to the second end than the twisted cutting edge and twisted from the side of the first end toward the second end in a direction opposite to the twisted cutting edge;
- and
- a reverse twisted flute located at the front of the reverse twisted cutting edge in the rotational direction and extending along the reverse twisted cutting edge;
- wherein
- the reverse twisted flute is connected to the twisted flute, and
- the twisted cutting edge comprises a first part having a length from the rotation axis decreasing as approaching toward the second end,
- the first part includes an end part of the twisted cutting edge located at a side of the second end,
- the main body further comprises a first surface located in contact with the twisted cutting edge at a rear of the twisted cutting edge in the rotational direction,
- the first surface has a linear shape in a cross section orthogonal to the rotation axis and decreases in a length from the rotation axis as proceeding away from the twisted cutting edge and comprises a first portion that is located on a side of the second end and that has a first width in a direction orthogonal to the rotation axis, and the first width becomes widened from a side of the first end toward the second end.
13 more elements
Dependencies are inferred from the claim text.