Milling cutter, particularly for copying, and cutting insert the

Details Milling cutter, particularly for copying, and cutting insert the Milling cutter, particularly for copying, and cutting insert the

1997-06-16

1999-09-14

Pitts, Andrea L.

Cutters, for shaping

Rotary cutting tool

Including holder having seat for inserted tool

407 42, 407 65, 407113, B23C 520

Patent

active

059512130

ABSTRACT:
To facilitate manufacture and stocking of inserts for the ball end of a ball milling cutter, identical asymmetrical cutting inserts which are of generally pointed, elongated leaf shape, define two end points or tips, with two cutting edges opposite a theoretical straight line connecting the tips. The cutting edges (14, 15) each have at least one curved portion (24, 26) and an adjoining elongated, roughly straight portion (23, 25). The lengths of the respective curved portions and straight portions on the two cutting edges are different, and the edges and their respective lengths and positions with respect to an attachment hole (17) are so arranged that the first cutting edge of one insert on one side cuts on a ball surface which extends at least up to approximately the center line of the milling tool, and the straight cutting edge merges into a cylindrical surface. The curved portion (26) of the other cutting edge (15) of a second, identical insert completes the ball cutting surface and also merges into a cylindrical surface, so that, in operation, one longer and one shorter curved portion, respectively, on both inserts are actively cutting. When the cutting edges are worn, the inserts are interchanged on the respective plate seats of the milling cutter so that the previously inactive shorter or longer curved edge, cut at the end surface.

REFERENCES:
patent: D309317 (1990-07-01), Tsujimura et al.
patent: 4525110 (1985-06-01), Stojanovski
patent: 4527930 (1985-07-01), Harroun
patent: 4808045 (1989-02-01), Tsujimura et al.
patent: 4927303 (1990-05-01), Tsujimura et al.
patent: 5580194 (1996-12-01), Satran et al.
patent: 5622460 (1997-04-01), Satran et al.
patent: 5741095 (1998-04-01), Charron et al.

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