Metal working – Method of mechanical manufacture – Shaping one-piece blank by removing material
Patent
1984-11-05
1986-12-30
Briggs, William R.
Metal working
Method of mechanical manufacture
Shaping one-piece blank by removing material
29 26A, 144 27, 408 1R, 408 26, 409132, B23B 3902, B23P 1302
Patent
active
046317996
ABSTRACT:
A work piece is mortised to receive an insert, and drilled for fastenings securing the insert in position, in a single cycle of operation facilitated by mounting the drill in an axial hole in the routing cutter. The drill is guided by the radially inner surfaces of the specially hard cutter inserts. A mechanism advances and retracts the drill with respect to the cutter, with the extension of the drill beyond the cutter taking place only when the cutter is not moving laterally in forming the mortise. The mortised depth is accurately controlled by an adjustable stop traversed by the drill, and forming an abutment limiting the insertion of the router bit into the holding collet. In addition to the plunge and horizontal movements involved in the formation of the mortise, a vertical movement to form mortise side-openings is provided by pivoting downward the frame carrying the entire movement system. Chips are cleared from the drill by spinning them off in an air blast while the drill is extended from the cutter, with the cutter being withdrawn from the work piece.
REFERENCES:
patent: 3158186 (1964-11-01), Heathington
patent: 3200862 (1965-08-01), Heathington
patent: 4100661 (1978-07-01), Cheak
Alexander Dodds Company
Briggs William R.
Morse Glenn B.
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