Throw away insert

Details Throw away insert Throw away insert

1993-04-26

1994-12-13

Terrell, William E.

Cutters, for shaping

Including tool having plural alternatively usable cutting edges

With integral chip breaker, guide or deflector

407115, B23B 2722, B23C 520

Patent

active

053724631

ABSTRACT:
A throw-away insert for low-depth-of-cut finish cutting can be used over a wide range of feed rates. A breaker groove is provided between the center land and each cutting edge. An arcuate small protrusion is formed on the bisector of each nose portion. A narrow groove is formed in the small protrusion. Thin chips, which are produced while the feed rate is low, are curled and broken by the groove formed in the protrusion. Thick chips, which are produced while the feed rate is high, are guided along the grooves and collide with an edge of a side wall of the center land. Thus, thick chips are also smoothly curled and broken by the edge.

REFERENCES:
patent: 3792514 (1974-02-01), Ushijima
patent: 3815192 (1974-06-01), Ohtsu
patent: 4214845 (1980-07-01), Mori
patent: 4681487 (1987-07-01), Petterson
patent: 4969779 (1990-11-01), Barten
patent: 5044839 (1991-09-01), Takahashi
patent: 5044840 (1991-09-01), Fouquer et al.
patent: 5074720 (1991-12-01), Loqvist et al.
patent: 5076739 (1991-12-01), Pano
patent: 5082401 (1992-01-01), Niebauer
patent: 5141367 (1992-08-01), Beeghly et al.

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