Milling cutting insert
AssigneeIscar, Ltd.
InventorAmir Satran
Life of this patent
Estimating the term…
Abstract
A replaceable cutting insert for use in a peripheral rotary milling cutter and being formed with at least one cutting edge defined between a cutting rake surface and a relief flank surface of the insert. The relief flank surface comprises a first portion defined between the cutting edge and an intermediate portion of the relief flank surface and a second portion defined between the intermediate portion and a base of the insert. The first portion presents a first relief flank angle which is significantly greater than a second relief flank angle presented by the said second portion.
Claims17
A cutting insert of substantially parallelipipedal shape and comprising a first pair of opposite cutting edges respectively defined between first pairs of cutting rake surfaces and relief flank surfaces, a second pair of opposite cutting edges respectively defined between second pairs of cutting rake surfaces and relief flank surfaces;
- each relief flank surface of said first pair of relief flank surfaces comprising a first portion defined between a cutting edge and an intermediate portion of said relief flank surface and a second portion defined between said intermediate portion and a base of the insert, said first portion presenting a first relief flank angle, said second portion presenting a second relief flank angle, said first relief flank angle being significantly greater than said second relief flank angle, said intermediate portion bridging said first and second portions and being directed transversely with respect to said first and second portions.
For use in a peripheral rotary milling cutter having a cylindrical holder and at least one replaceable, peripherally disposed cutting insert, a cutting insert of substantially parallelipipedal shape and comprising a first pair of opposite cutting edges respectively defined between first pairs of cutting rake surfaces and relief flank surfaces;
- a second pair of opposite cutting edges respectively defined between second pairs of cutting rake surfaces and relief flank surfaces, said first pair of cutting edges being of reduced length as compared with said second pair of cutting edges;
- the relief flank surfaces of said first pair respectively defining, with the adjacent relief flank surfaces of said second pair, first and second pairs of common insert corners;
- a first pair of wipers formed on the relief flank surfaces of said second pair of relief flank surfaces adjacent a first pair of diagonally opposed insert corners so as to be associated respectively with the cutting edges of said first pair of cutting edges;
- and a second pair of wipers formed on the relief flank surfaces of said first pair of relief flank surfaces adjacent a second pair of diagonally opposed insert corners so as to be associated respectively with the cutting edges of said second pair of cutting edges, each of the first pair of wipers having a wiper edge which defines an obtuse angle with its associated cutting edge.
Dependencies are inferred from the claim text.