Woodworking – Rotary cutter – Cylindrical cutter having spiral bit
Patent
1988-08-19
1989-05-16
Bray, W. Donald
Woodworking
Rotary cutter
Cylindrical cutter having spiral bit
144117R, 144230, 144241, 407 46, 407 49, 407 63, B27C 100
Patent
active
048300730
ABSTRACT:
The head (1) of the planing tool includes a plurality of helical grooves (2) of dovetail cross-section uniformly distributed over its periphery. Wedging devices (6) with knives (5) resting thereon are insertable sideways in the grooves. Disposed in each wedging device is a securing arrangement (7), actuation of which causes the associated wedging device-and-knife assembly to be pressed against the outwardly tapering sidewalls (17, 18) of the respective groove and held fast. Each of the knives has two opposite cutting edges (19, 20), either of which can be brought into operating position by reversing the knife. A second groove (16) runs parallel to each first groove (2) for receiving a guide component of a knife-aligning device. Owing to the helical configuration of the grooves and the precisely aligned cutting edges of the reusable knives disposed in the grooves, vibration-free machining of workpieces with planing widths of up to more than two meters is possible.
REFERENCES:
patent: 811768 (1906-02-01), Forbes
patent: 3574251 (1971-04-01), Corti
patent: 3785417 (1974-01-01), Vora
patent: 3868751 (1975-03-01), Holthuis
patent: 4074737 (1978-02-01), Stewart
patent: 4253506 (1981-03-01), Shimohira
patent: 4485858 (1984-12-01), Cecchi
Marcoloy Carbide Cutting Tools, undated.
Quietcut.TM. Helical Carbide Cutterhead, Newman-Whitney, Newman Machine Company, Inc., undated.
Oliver Noise Control, Oliver Machinery Company, 1982.
"Neuartige Spiralmesserwelle fur ger/e,uml/a/ uscharmes Hobeln," HGB-Mitteilungen, No. 42, 7-9/1985.
Bray W. Donald
Mida-Maquinas Industriais do Ave,Lda.
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