Cutting by use of rotating axially moving tool – Processes – Bit detachable
Patent
1996-01-04
1997-08-05
Rachuba, M.
Cutting by use of rotating axially moving tool
Processes
Bit detachable
408 67, 408153, 408225, B23B 3500, B23B 5105
Patent
active
056535600
ABSTRACT:
A boring apparatus which includes a rotatable cutting head used to cut a hole in a workpiece. The cutting head is mounted on an axially movable support, and is rotatable about and reciprocally movable along the axis between a forward cutting position, to engage and cut the workpiece, and a rearward position spaced from the workpiece. Cutting is performed by a cutting blade which is spaced radially from the axis, and which is movable relative to the rest of the cutting head by a blade advance mechanism. During cutting operation, the blade advance mechanisms move cutting blade both forwardly and radially inwardly through the workpiece wall, in the same direction at which the blade is inclined. The hole is thus formed by lowering the cutting head and then rotating the cutting blade as the blade advance mechanism moves the blade at an angle through the workpiece. Both the resulting hole and waste plug cut from the workpiece produced by the angled movement of the blade have complementary tapered edge portions, with the result that the plug will have a portion with a diameter which is larger than the smallest diameter portion of the hole.
REFERENCES:
patent: 2435648 (1948-02-01), Frevel
patent: 2779361 (1957-01-01), Mckiff
patent: 2896729 (1959-07-01), Brechlin
patent: 3673902 (1972-07-01), Strobel
patent: 3849019 (1974-11-01), Green
patent: 4878786 (1989-11-01), Hedgepeth
patent: 4884571 (1989-12-01), Baker
patent: 5199830 (1993-04-01), Otani et al.
Pupovac Rade
Weber Wolfgang
KVT Technologies Inc.
Rachuba M.
Tsai Henry W. H.
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