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US 2006/0222466 A1Published application
Milling Cutting Insert and Milling Cutter
AssigneeIscar, Ltd.
InventorsAmir Satran, Danny Chen
Life of this patent
Estimating the term…
Abstract
A shank of a milling cutter can be somewhat elastic. As a result, during plunging down into a workpiece the milling cutter will not plunge in a true axially downward direction and will form a slanted wall in the workpiece. A milling cutting insert is provided which is capable of “straightening out” the slanted wall. The cutting insert has a rear cutting edge which removes material when the milling cutter is moved axially upwardly.
Claims21
A milling cutting insert (10) comprising:
- a pair of opposing end surfaces (12), a pair of opposing minor surfaces (14) and a pair of opposing major surfaces (16);
- each end surface (12) and major surface (16) intersect at a major edge (20), at least a portion of which forms a major cutting edge (30);
- and
- each end surface (12) and minor surface (14) intersect at a minor edge (32), at least a first portion of which forms a minor cutting edge (36) and at least a second portion of which forms a rear cutting edge (44);
- wherein:
- each rear cutting edge (44) merges with and is transverse to an adjacent minor cutting edge (36);
- each rear cutting edge (44) has a rear relief face (48) that extends towards an opposite end surface (12);
- each rear cutting edge (44) has a rear rake face (50) that extends along the associated end surface (12);
- and
- in a top view of the cutting insert (10), one rear cutting edge (44) of each end surface (12) is not obscured by any part of the cutting insert (10).
7 more elements
A milling cutting insert (10) comprising:
- a pair of opposing end surfaces (12), a pair of opposing minor surfaces (14) and a pair of opposing major surfaces (16);
- each end surface (12) and major surface (16) intersect at a major edge (20), at least a portion of which forms a major cutting edge (30);
- each end surface (12) and minor surface (14) intersect at a minor edge (32), at least a portion of which forms a minor cutting edge (36);
- and
- a first axis (A) passing through the two end surfaces (12), a second axis (B) perpendicular to the first axis (A) and passing through the two minor surfaces (14) and a third axis (C) perpendicular to the first and second axes (A, B) and passing through the two major surfaces (16), the first and third axes (A, C) define a first plane (P1), and the second and third axes (B, C) define a second plane (P2);
- wherein:
- an intersection between each end surface (12) and each minor surface (14) also forms a rear edge (34) that extends towards an adjacent major edge (20);
- at least a portion of the rear edge (34) constitutes a rear cutting edge (44) which merges with the minor cutting edge (36) and extends therefrom towards the first plane (P1) in the general direction of the second axis (B);
- the rear cutting edge (44) has a rear relief face (48) which extends away from the rear cutting edge (44) towards the second plane (P2);
- the rear cutting edge (44) has a rear rake face (50) which extends away from the rear cutting edge (44) along a portion of its associated end surface (12);
- and
- in a top view of the cutting insert (10), one rear cutting edge (44) of each end surface (12) is not obscured by any part of the cutting insert (10).
9 more elements
Dependencies are inferred from the claim text.