Milling cutter having serrated cutting inserts spaced apart with varying axial offsets
AssigneeIscar, Ltd.
InventorsYuri Men, Eduard Astrakhan
Life of this patent
Estimating the term…
Abstract
A milling cutter includes a cutter body and at least three circumferentially spaced insert pockets, axially offset one with respect to the other, each having a replaceable cutting insert secured thereto. Each cutting insert has at least two identical straight serrated cutting edges and all the cutting inserts are identical. A first insert pocket (30) is an axially forwardmost insert pocket. A second insert pocket is axially offset from the first insert pocket by a first offset distance that is smaller than an offset distance associated with any other pair of axially adjacent insert pockets.
Claims12
A milling cutter (10) comprising:
- a cutter body (12) having a longitudinal axis (A) extending in a forward to rearward direction and at least three insert pockets (18) adjacent a forward end surface (14) of the cutter body (12) and circumferentially spaced one from the other;
- and
- a replaceable cutting insert (20, 38, 42, 46, 48) secured to each insert pocket (18), each cutting insert (20) having at least two identical straight serrated cutting edges (24) and an operative axially forward serration (29′), all the cutting inserts (20) being identical;
- wherein:
- a first insert pocket (30) is an axially forwardmost insert pocket;
- all the insert pockets (18) are axially offset one with respect to the other;
- and
- a second insert pocket (32) is axially offset from the first insert pocket (30) by a first offset distance (d1) that is smaller than an offset distance (d2, d3) associated with any other pair of axially adjacent insert pockets;
- the operative axially forward serration (29′) of a second cutting insert (42) seated in the second insert pocket (32) overlaps the operative axially forward serration (29′) of a first cutting insert (38) seated in the first insert pocket (30);
- and
- the operative axially forward serration (29′) of a third cutting insert (46) seated in a third insert pocket (34) overlaps the operative axially forward serration (29′) of the second cutting insert (42) seated in the second insert pocket (32).
A milling cutter (10) comprising:
- a cutter body (12) having a longitudinal axis (A) extending in a forward to rearward direction and at least three insert pockets (18) adjacent a forward end surface (14) of the cutter body (12) and circumferentially spaced one from the other;
- a replaceable cutting insert (20) secured to each insert pocket (18), each cutting insert (20) having at least two identical straight serrated cutting edges (24) and an operative axially forward serration (29′);
- wherein:
- all the cutting inserts (20) are identical;
- the operative axially forward serrations (29′) of the cutting inserts are axially offset one with respect to another;
- the operative axially forward serration (29′) of a first of the cutting inserts is axially forward of the operative axially forward serration (29′) of a second of the cutting inserts by a first offset distance (d1);
- the first offset distance (dl) is smaller than an offset distance (d2, d3) associated with any other pair of axially adjacent cutting inserts (20);
- the operative axially forward serration (29′) of the second of the cutting inserts overlaps the operative axially forward serration (29′) of the first of the cutting insert;
- and
- the operative axially forward serration (29′) of a third of the cutting inserts (46) overlaps the operative axially forward serration (29′) of the second of the cutting inserts.
Dependencies are inferred from the claim text.