Cutters – for shaping – With means to apply fluid to cutting tool
Patent
1991-03-25
1992-02-18
Bishop, Steven C.
Cutters, for shaping
With means to apply fluid to cutting tool
407 48, 407104, 408222, 408233, B23G 518, B23C 528
Patent
active
050888617
ABSTRACT:
A threadmilling tool is described, of the type that includes a thread cutting insert 14 (FIG. 1) that mounts on an insert holder 12 which is turned by a milling machine, wherein the insert provides four separate cutting edges 30-36 and can be accurately relocated on the holder. The insert has a cross-section forming a mount portion 50 (FIG. 5) with six straight locating sides 51-56 lying on the sides of an imaginary bisymmetrical polygon 58, and forming a radially outwardly-extending arm 60, 62 at each corner of the polygon. Each arm has an outer border 70 and a pair of opposite sides 72, 74 that extend largely radially from the axis 24 of the polygon, and each arm forms a cutting edge (e.g. 30) at the intersection of the outer border and each side of the arm. A tool holder 16 (FIG. 2) for holding the insert, has walls forming, in cross-section, a pair of straight holder positioning surfaces 80, 82 that abut a pair of insert locating sides, while avoiding contact with the arms 60, 62.
REFERENCES:
patent: 1701775 (1929-02-01), Hall
patent: 2954570 (1960-10-01), Couch
patent: 4531863 (1985-07-01), Smith
patent: 4607988 (1986-08-01), Salm et al.
patent: 5004379 (1991-04-01), Little
Bishop Steven C.
Freilich Arthur
Hornbaker Robert D.
Rosen Leon D.
Threading Systems, Inc.
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