Method and apparatus for bonding PDC blanks

Details Method and apparatus for bonding PDC blanks Method and apparatus for bonding PDC blanks

1995-02-28

1995-12-19

Ramsey, Kenneth J.

Electric heating

Inductive heating

Metal working

219651, B23K 1002

Patent

active

054770343

ABSTRACT:
The present system is directed to both a method and apparatus for manufacture of teeth for use in drill bits. The desired tooth is formed by a hard carbide, a protective disc placed on the end of the support, the joinder being accomplished by a braze metal layer. The process contemplates positioning the disc in a matching receptacle within the head of a molding apparatus wherein the head and cavity of the head are exposed to the terminus of several coolant flow lines through the head so that the disc is brought into contact with flowing coolant. The fluid coolant is delivered by a compressor at elevated pressure and is a flow of cooled gas after dehydration. Rapid flow of heat into cooled support at the base prevent deterioration of the diamond layer while allowing use of higher temperature braze metals.

REFERENCES:
patent: 3178549 (1965-04-01), Stein
patent: 4156329 (1979-05-01), Daniels
patent: 4225322 (1980-09-01), Knemeyer
patent: 4319707 (1982-03-01), Knemeyer
patent: 4527998 (1985-07-01), Knemeyer
patent: 4772294 (1988-09-01), Schroeder

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