Ball end mill

Details Ball end mill Ball end mill

1992-12-22

1994-03-15

Bishop, Steven C.

Cutters, for shaping

Rotary cutting tool

Including holder having seat for inserted tool

407 42, 407 54, 407116, B23C 520

Patent

active

052942198

ABSTRACT:
There is disclosed a ball end mill which has a hemishepherical portion formed at a front end of an end mill body. A pair of tip mounting seats are formed at the hemishepherical portion. A main throw-away tip and a second throw-away tip are secured on the tip mounting seat respectively such that the axial rake angle of the main tip is set at a negative angle and the axial rake angle of the second tip is set at a positive angle. There is also disclosed a second ball end mill. In the second ball end mill, only a main throw-away tip is secured on a tip mounting seat. The axial rake angle of the main tip is set at a negative angle. One or more chip breaker grooves are formed on a rake face of the tip.

REFERENCES:
patent: 3815191 (1974-06-01), Holma
patent: 4132493 (1979-01-01), Hosoi
patent: 4214847 (1980-07-01), Kraemer
patent: 4527930 (1985-07-01), Harroun
patent: 4572714 (1986-02-01), Suzuki et al.
patent: 4616963 (1986-10-01), Habert et al.
patent: 4834591 (1989-05-01), Tsujimura et al.
patent: 4898499 (1990-02-01), Tsujimura et al.
patent: 5017055 (1991-05-01), Tsujimura et al.

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