Bonding process for grinding tools
OwnerJ. Lawrence Fletcherinventor
Life of this patent
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Abstract
A dual bonding process to make single layered tools wherein a metallic workpiece is pre-etched so as to form cavities in the surface of the workpiece for individually receiving diamond or other abrasive particles to be bonded thereto. The diamond particles are uniformly deposited and densely bonded to the surface of said metallic workpiece by a metallic bonding matrix applied in a first plating bath. A second selective plating of metal applied in a second plating bath more securely bonds the diamonds to the workpiece and provides the workpiece with a predetermined hardness for any selected grinding or cutting application. In order to make multilayered tools, this dual bonding process may be repeated for each layer applied.
Claims17
A process for bonding abrasive particles to the surface of a metal workpiece, the process comprising the steps of:
- 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;
- placing the etched workpiece in a first plating bath comprising an aqueous solution of metal ions;
- introducing abrasive particles into said first plating bath;
- placing 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 plated 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.
A process for bonding abrasive particles to the surface of a metal workpiece, the process comprising the steps of:
- 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;
- preparing a first plating bath comprising an aqueous solution of metal ions;
- placing a porous platform in said first bath;
- supporting abrasive particles on said platform;
- surrounding at least the etched portion of the workpiece with said abrasive particles which have been placed on said platform;
- placing 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 plated thereto;
- plating a first coat of metal veneer around said abrasive particles and onto said workpiece as said plating solution is passed through said porous platform and the abrasive particles supported thereon 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.
A process for bonding abrasive particles to the surface of a metal workpiece, the process comprising the steps of:
- etching the surface of said workpiece so as to improve the mechanical bond between said surface and a first coat of metal that is subsequently plated onto said surface;
- placing the workpiece in a first plating bath comprising an aqueous solution of metal ions;
- introducing abrasive particles into said first bath;
- placing a metal anode in said first plating bath and imposing an electromotive force across the anode and workpiece so as to cause said abrasive particles to become plated onto the surface of the workpiece as a first coat of metal is plated onto the workpiece and around the particles;
- and
- placing the workpiece in a second plating bath comprising an aqueous solution of metal ions and plating a second coat of metal around the particles which were previously plated onto said workpiece in the first bath.
Dependencies are inferred from the claim text.