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US 2020/0047258 A1Published application
Indexable tangential cutting inserts and cutting tool holders
AssigneeKennametal Inc.
InventorsXiangdong D. Fang, Jean-Luc D. Dufour, David J. Wills
Life of this patent
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Abstract
Cutting tool systems including a tool holder and tangential cutting inserts are disclosed. The tangential cutting inserts have indexable cutting edges that may be sinusoidal-shaped and helical-shaped. The tangential cutting inserts have integrated fan and base portions. The tool holders comprise a plurality of insert pockets structured and arranged to receive the indexable tangential cutting inserts. The cutting tool systems provide cutting tools with effectively longer sinusoidal and helical cutting edges at their cutting rake faces and a strong support when seating in insert-receiving pockets on the tool holder.
Claims30
A tangential cutting insert comprising:
- a base portion comprising:
- a substantially planar rear face;
- a first substantially planar side base surface extending forward from the substantially planar rear face;
- and
- a second substantially planar side base surface extending forward from the substantially planar rear face;
- a substantially planar top base surface perpendicular to the first and second substantially planar side base surfaces and the substantially planar rear face;
- a substantially planar bottom base surface perpendicular to the first and second substantially planar side base surfaces and the substantially planar rear face;
- and
- a mounting through hole extending from the substantially planar top base surface to the substantially planar bottom base surface,
- wherein the substantially planar top base surface and the substantially planar bottom base surface are 180-degree rotationally symmetric about a central axis extending perpendicularly from the substantially planar rear base surface to a front surface, and
- a cutting portion comprising:
- a first side fan surface extending forward from the first substantially planar side base surface at a first outward taper angle and terminating at the front surface;
- and
- a second side fan surface extending forward from the second substantially planar side base surface at a second outward taper angle and terminating at the front surface.
11 more elements
(canceled)
A tangential cutting insert comprising:
- a substantially planar rear base surface;
- a front cutting surface opposing the substantially planar rear base surface;
- a central axis extending perpendicularly from the substantially planar rear base surface to the front cutting surface;
- and
- a first sinusoidal and helical cutting edge at a first edge of the front cutting surface and a second sinusoidal and helical cutting edge at a second edge of the front cutting surface, wherein the first and second sinusoidal and helical cutting edges are 180-degree rotationally symmetric about the center axis of the tangential cutting insert.
2 more elements
A cutting tool system comprising:
- a plurality of cutting inserts, each cutting insert comprising:
- a substantially planar rear face having a base width;
- a first substantially planar side base surface extending forward from the substantially planar rear face;
- a second substantially planar side base surface extending forward from the substantially planar rear face;
- and
- a front cutting surface having a cutting surface width greater than the base width;
- and
- a tool holder comprising a plurality of insert pockets positioned in a helical orientation about a longitudinal axis of the tool holder, each insert pocket comprising:
- a rear surface to engage the substantially planar rear face of the cutting insert;
- a first sidewall portion extending forward from the rear surface to accommodate the first substantially planar side surface of the cutting insert;
- a second sidewall portion extending forward from the rear surface to engage the second substantially planar side surface of the cutting insert;
- a bottom seating surface extending perpendicularly from the first and second sidewall portions and the rear surface;
- and
- a radially recessed front portion,
- wherein the first and second sidewall portions of each insert pocket terminate at an outward taper to accommodate a cutting portion of the cutting insert.
12 more elements
(canceled)
A cutting tool holder comprising:
- a plurality of insert pockets positioned in a helical orientation about a longitudinal axis of the tool holder, each insert pocket comprising:
- a substantially planar rear surface;
- a first substantially planar sidewall portion extending perpendicularly from the substantially planar rear surface;
- a second substantially planar sidewall portion extending perpendicularly from the substantially planar rear surface;
- a substantially planar bottom seating surface extending perpendicularly from the first and second substantially planar sidewall portions and the substantially planar rear surface;
- and
- a radially recessed front portion, wherein the radially recessed front portion is structured and arranged to receive a cutting portion of a cutting insert.
4 more elements
(canceled)
A cutting tool holder comprising:
- a plurality of insert pockets positioned in a helical orientation about a longitudinal axis of the tool holder, each insert pocket comprising:
- a first coolant outlet aperture structured and arranged to provide coolant to a cutting edge of a first cutting insert;
- and
- a second coolant outlet aperture structured and arranged to provide coolant to an intersection of the cutting edge of the first cutting insert and a cutting edge of a second cutting insert.
1 more element
Dependencies are inferred from the claim text.