Method of manufacturing diamond-impregnated drilling crowns

Details Method of manufacturing diamond-impregnated drilling crowns Method of manufacturing diamond-impregnated drilling crowns

1993-10-07

1995-02-14

Watts, Douglas D.

Metal tools and implements, making

Blank or process

Drill

761084, 76DIG12, 125 3001, 21912172, 21912185, B22F 508, B23P 1528

Patent

active

053884841

ABSTRACT:
A method of manufacturing drilling crowns for cylindrical diamond drilling tool bits affords a waste-free fabrication of the drilling crowns impregnated with diamond particles. In a first step an annular axially extending middle or intermediate zone impregnated with diamond particles is joined at each of its opposite end by sintering to a different annular metal end zone. In a second step the intermediate zone is laser cut to form two similar drilling crowns with circumferentially spaced teeth. The teeth form diamond segments providing economical fabrication and a high quality connection with the end zones.

REFERENCES:
patent: 1572349 (1926-02-01), Chamberlin
patent: 1990077 (1935-02-01), Kershaw
patent: 4186628 (1980-02-01), Bonnile
patent: 4989578 (1991-02-01), Lebourg
patent: 5247923 (1993-09-01), Lebourg

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