Thread milling tool and method for machining threads
AssigneeIscar, Ltd.
InventorsVITALY OREN, YOSEF COHEN, SERGEY IRLIN, DMITRI KOROL
Life of this patent
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Abstract
A thread milling cutter (1) includes an integrally formed thread milling tool (10) having a rotational axis (S), a shank portion (24) and a forward cutting portion (34). The cutting portion (34) has at least five insert pockets (42) recessed therein with at least one insert pocket (42) being devoid of an associated support protrusion (46), allowing different insert placements for different thread pitches.
Claims20
A thread milling tool (10) being rotatable in a rotation direction (Rd) about a rotational axis (S) defining opposing inward and outward radial directions (Ri, Ro) and opposing forward and rearward directions (Fw, Rw), the thread milling tool (10) comprising:
- a shank portion (24);
- and
- a cutting portion (34) located forwardly of the shank portion (24), the cutting portion (34) comprising:
- a cylindrical-shaped cutting peripheral surface (38);
- and
- a plurality of insert pockets (42) recessed into the cutting peripheral surface (38);
- wherein:
- the plurality of insert pockets (42) are at least five insert pockets (42);
- the thread milling tool (10) is an integrally formed tool;
- and
- at least one insert pocket (42), which is not a forward insert pocket (43), is devoid of an associated support protrusion (46).
A method of machining a thread having a particular one of a predetermined number of different thread pitches using a single thread milling cutter, the method comprising:
- (a) providing a thread milling tool;
- (b) selecting a desired pitch length DPT of the thread to be machined;
- (c) determining a smallest non-zero integer K such that K*LPT/DPT results in an integer;
- (d) placing thread-cutting inserts (100) in insert pockets (42) so that the following condition:
- LPI=K*LPT is achieved between axially adjacent thread-cutting inserts (100) placed in the thread milling tool (10);
- and
- (e) machining a workpiece in a movement at the desired pitch length DPT of the thread being machined.
A method of machining different pitched threads using a thread milling cutter (1) having a rotational axis (S) and a plurality of insert pockets (42) arranged along an imaginary helix (H), wherein the thread-cutting inserts (42) are secured to only a subset of the plurality of insert pockets (42) and not all of the insert pockets (42).
Dependencies are inferred from the claim text.