End mill
AssigneeKawasaki Jukogyo Kabushiki Kaisha
InventorsTakuya Ota, Masayoshi Zaitsu, Naohiro Otsuki
Life of this patent
Estimating the term…
Abstract
An end mill includes: a columnar tool body that rotates about a center axis; and outer peripheral cutting edges on an outer peripheral surface of the tool body, the outer peripheral cutting edges including a first outer peripheral cutting edge and a second outer peripheral cutting edge. A relief angle θ of the first outer peripheral cutting edge changes to increase in an axial direction of the tool body from a bottom face that is one end of the tool body. A relief angle θ of the second outer peripheral cutting edge changes to decrease in the axial direction from the bottom face.
Claims6
An end mill comprising:
- a columnar tool body that rotates about a center axis, the tool body having a diameter that is constant in an axial direction of the tool body from a shank end to a machining end of the tool body;
- and
- a plurality of outer peripheral cutting edges on an outer peripheral surface of the tool body;
- the plurality of outer peripheral cutting edges comprising at least two first outer peripheral cutting edges and at least two second outer peripheral cutting edges, each of the at least two first outer peripheral cutting edges having a relief angle and each of the at least two second outer peripheral cutting edges having a relief angle;
- wherein the relief angle of each of the at least two first outer peripheral cutting edges increases continuously in the axial direction of the tool body from the shank end to the machining end, while the relief angle of each of the at least two second outer peripheral cutting edges decreases continuously in the axial direction of the tool body from the shank end to the machining end;
- and
- at an arbitrary position in the axial direction each of the relief angles of each of the at least two first outer peripheral cutting edges is different from each other, and
- at an arbitrary position in the axial direction each of the relief angles of each of the at least two second outer peripheral cutting edges is different from each other.
An end mill comprising:
- a columnar tool body having a diameter, a shank end and a machining end;
- the tool body having a constant diameter extending in an axial direction along a center rotation axis between the shank end and the machining end;
- the end mill, on an outer peripheral surface, comprises a plurality of outer peripheral cutting edges extending between the machining end and shank end;
- wherein the plurality of outer peripheral cutting edges comprises in order along a circumferential rotation direction:
- at least a first outer peripheral cutting edge having a first relief angle,
- at least a second outer peripheral cutting edge having a second relief angle,
- at least a third outer peripheral cutting edge having a third relief angle,
- and at least a fourth outer peripheral cutting edge having a fourth relief angle;
- wherein the each of the first relief angle and third relief angle increases continuously in the axial direction from the shank end to the machining end while each of the second relief angle and the fourth relief angle decreases continuously in the axial direction from the shank end to the machining end;
- wherein the first relief angle is different from the third relief angle at an arbitrary position in the axial direction, and
- the second relief angle is different from the fourth relief angle at an arbitrary position in the axial direction.
Dependencies are inferred from the claim text.