US4079552A — Diamond bonding process

Claim 1

Independent Claim 191 words

A process for bonding abrasive particles to a metal surface comprising the steps of: obtaining a metal workpiece; preparing the workpiece by first chemically etching the surface to form cavities therein of sufficient size to receive a portion of the abrasive particle; suspending abrasive particles in a first plating bath comprising an aqueous solution of nickel ions and constantly agitating the bath to maintain suspension of the abrasive particles; placing the prepared workpiece and a nickel anode in the plating bath and imposing an electromotive force between the workpiece and the anode so as to cause a substantial portion of the abrasive particles to become individually partially embedded in the cavities of the etched surface of the workpiece as nickel is plated onto the workpiece and around the embedded particles; removing the abrasive plated workpiece from the plating bath and subjecting the workpiece to aqueous rinse; immersing the abrasive plated workpiece in a second plating bath comprising an aqueous solution of nickel ions so as to form a second surface of nickel metal around the partially embedded abrasive particles; and heat treating the workpiece after removal from the second plating bath.

Claim 2

Dependent Claim 191 words

A process for bonding abrasive particles to a metal surface comprising the steps of: obtaining a metal workpiece; preparing the workpiece by first chemically etching the surface to form cavities therein of sufficient size to receive a portion of the abrasive particle; suspending abrasive particles in a first plating bath comprising an aqueous solution of nickel ions and constantly agitating the bath to maintain suspension of the abrasive particles; placing the prepared workpiece and a nickel anode in the plating bath and imposing an electromotive force between the workpiece and the anode so as to cause a substantial portion of the abrasive particles to become individually partially embedded in the cavities of the etched surface of the workpiece as nickel is plated onto the workpiece and around the embedded particles; removing the abrasive plated workpiece from the plating bath and subjecting the workpiece to aqueous rinse; immersing the abrasive plated workpiece in a second plating bath comprising an aqueous solution of nickel ions so as to form a second surface of nickel metal around the partially embedded abrasive particles; and heat treating the workpiece after removal from the second plating bath.

Claim 3

Dependent Claim 23 words

A process as defined in claim 1 wherein immersing the abrasive plated workpiece is preceded by activation by exposing to an acid wash.

Claim 4

Dependent Claim 23 words

A process as defined in claim 1 wherein said plating step comprises orienting the surface to be plated out of the vertical plane.

Claim 5

Dependent Claim 20 words

A process as defined in claim 1 wherein the plating step includes rotating the workpiece while applying the electromotive force.

Claim 6

Dependent Claim 25 words

A process as defined in claim 1 wherein the immersing step includes placing the workpiece in an electroless plating bath as the second plating bath.

Claim 7

Dependent Claim 32 words

A process as defined in claim 1 wherein said heat treating step includes heating the workpiece to a temperature below the decomposition temperature of the abrasive particle until predetermined hardness is achieved.

Claim 8

Dependent Claim 160 words

A process for bonding abrasive particles to the surface of a metal workpiece, the proess comprising the steps of: chemically etching the surface of the workpiece so as to form cavities therein, said cavities generally being large enough to receive only a portion of one of the abrasive particles; suspending the abrasive particles in a first plating bath comprising an aqueous solution of metal ions; agitating the bath at least periodically to suspend the abrasive particles; placing the etched workpiece and a metal anode in the first plating bath and imposing an electromotive force across the anode and workpiece so as to cause abrasive particles to become individually partially embedded in the cavities of the etched surface of the workpiece as metal is placed onto the workpiece and around the embedded particles; and placing the workpiece in a second bath comprising an aqueous solution of metal ions and plating a second coat of metal around the partially embedded abrasive particles.

Claim 9

Dependent Claim 160 words

A process for bonding abrasive particles to the surface of a metal workpiece, the proess comprising the steps of: chemically etching the surface of the workpiece so as to form cavities therein, said cavities generally being large enough to receive only a portion of one of the abrasive particles; suspending the abrasive particles in a first plating bath comprising an aqueous solution of metal ions; agitating the bath at least periodically to suspend the abrasive particles; placing the etched workpiece and a metal anode in the first plating bath and imposing an electromotive force across the anode and workpiece so as to cause abrasive particles to become individually partially embedded in the cavities of the etched surface of the workpiece as metal is placed onto the workpiece and around the embedded particles; and placing the workpiece in a second bath comprising an aqueous solution of metal ions and plating a second coat of metal around the partially embedded abrasive particles.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1981-03-20	1981-09-19	1982-03-21	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1985-03-20	1985-09-19	1986-03-21	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1989-03-20	1989-09-19	1990-03-21	$7700.00	Window Closed / Lapsed

Diamond bonding process

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