Gear cutting – milling – or planing – Milling – Thread or helix generating
Patent
1991-05-28
1995-07-04
Briggs, William
Gear cutting, milling, or planing
Milling
Thread or helix generating
408222, 409 74, 470198, 470199, B13C 300, B23G 520
Patent
active
054294592
ABSTRACT:
A threaded hole (20) in a workpiece (22) is formed by rapidly spinning an elongated tool (24) having a drill point (64) at one end, at least one longitudinally extending flute (80) having thread milling faces (84) for milling the thread to be formed, and wherein the tool (24) is first moved axially to carry the drill point (64) against and into the workpiece (22) to form a hole (66), then is displaced radially a distance equal to the thread depth to be formed, then is moved orbitally around the hole (66) to mill threads therein, then is displaced back to the center of the hole (20) and then is retracted from the hole (20). To form a helical thread in the hole (20), the tool (24) is shifted axially one thread pitch during the orbital movement. A thread milling drill head (26) is disclosed for chucking the tool (24) and shifting it through the aforesaid movements. Fluid flow may be induced into the hole (66a) to entrain the waste or fines and carry such out of the hole, and for this purpose a passageway (100) connects to a source (111) of fluid pressure with a turbine blade assembly (110) mounted on the tool (24a ).
REFERENCES:
patent: 637640 (1899-11-01), Mitchell
patent: 1162441 (1915-11-01), Bloss
patent: 1836954 (1931-12-01), Bryant
patent: 2042782 (1936-06-01), Hall
patent: 2461947 (1949-02-01), Weber
patent: 3167260 (1965-01-01), Gibbons et al.
patent: 3621754 (1971-11-01), Ditson
patent: 3857305 (1974-12-01), Lichtman
patent: 4011792 (1977-03-01), Davis
patent: 4487275 (1984-12-01), Froehlich
patent: 4620822 (1986-11-01), Hague et al.
Briggs William
Turchan Manuel C.
VanOphem John
VanOphem Remy J.
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