Method of manufacturing a rock bit cone

Details Method of manufacturing a rock bit cone Method of manufacturing a rock bit cone

1986-05-08

1987-05-26

Parker, Roscoe V.

Metal tools and implements, making

Blank or process

Drill

164 97, B21K 502, B22C 904, B22D 1900

Patent

active

046675434

ABSTRACT:
A method of manufacturing a rock bit cone having a substantially conical body on a surface of which a number of teeth are formed is manufactured by pressure-casting with using a casting mold having a molding surface including a cone body defining surface portion and tooth defining surface portions, pouring a molten metal of very hard and low melting point alloy having a melting point of 1040.degree.-1120.degree. C. and Rockwell hardness of 55-65 to the casting mold to centrifugal-cast at least a predetermined area including a tip of each tooth with the hard metal, and pouring a molten tough metal to the casting mold to centrifugal-cast the cone body.

REFERENCES:
patent: 1043831 (1912-11-01), Heinkel et al.
patent: 2125332 (1938-08-01), Bursell
patent: 2184776 (1939-12-01), Cottrell
patent: 2260593 (1941-10-01), Wittlinger
patent: 2442718 (1948-06-01), Woock
patent: 2740176 (1956-04-01), Duval
patent: 2743495 (1956-05-01), Eklund
patent: 4276788 (1981-07-01), Van Nederveen
patent: 4396077 (1983-08-01), Radtke
patent: 4423646 (1984-01-01), Bernhardt

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