Cutting by use of rotating axially moving tool – With means to apply transient – fluent medium to work or product – Including tool with duct
Patent
1980-03-26
1981-11-24
Hinson, Harrison L.
Cutting by use of rotating axially moving tool
With means to apply transient, fluent medium to work or product
Including tool with duct
407 11, B23B 2710, B23P 1528
Patent
active
043021352
ABSTRACT:
A rotary cutting tool having a cylindrical body with a plurality of flutes and a cutting tool insert mounted at the end of each flute adjacent the body cutting portion end face. The cutting inserts are mounted so that insert first cutting edges are spaced slightly axially outward of the tool body and extend at least generally radially thereof. A coolant flow passage extends coaxially through the body and includes radial branches communicating with the inserts. Preferably, the coolant flow passage is open at the body cutting portion end face and the branches comprise grooved areas in the end face. Each insert includes a coolant flow channel therein extending adjacent to and coextensive with the first cutting edge. An entrance area for these channels communicates with an associated one of the branches. In the preferred arrangement, each insert includes first and second cutting edges with the second cutting edges being slightly spaced radially outward of the cutting tool body. The coolant flow channel in each insert extends adjacent to and coextensive with both cutting edges. A portion of the fluid coolant introduced under pressure into the tool body coolant passage during a material removal operation is directed to and flows along the insert coolant flow channels to provide hydro-static support for workpiece chips for reducing insert wear. The coolant also provides a thermo-shield to reduce overall cutting temperatures.
REFERENCES:
patent: 1296536 (1919-03-01), Leech
patent: 1940220 (1933-12-01), McGrath
patent: 2188631 (1940-01-01), Kraus
patent: 2815688 (1957-12-01), Forbes et al.
patent: 3037264 (1962-06-01), Mossberg
patent: 3591306 (1971-07-01), Kaser
patent: 3816018 (1974-06-01), Hlocky
patent: 4072438 (1978-02-01), Powers
Blackhurst Daniel G.
Hinson Harrison L.
TRW Inc.
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