(19)
(11) EP 0 004 449 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.11.1979 Bulletin 1979/23

(43) Date of publication A2:
03.10.1979 Bulletin 1979/20

(21) Application number: 79300429

(22) Date of filing: 19.03.1979
(84) Designated Contracting States:
BE CH DE FR GB IT LU NL SE

(30) Priority: 20.03.1978 US 888081

(71) Applicant: Fletcher, J. Lawrence
 ()

(72) Inventor:
  • Fletcher, J. Lawrence
     ()

   


(54) Bonding process for grinding tools


(57) A bonding process for grinding tools in which a metallic workpiece (10) is pre-etched (14) to form cavities in the surface of the workpiece for individually receiving abrasive particles to be bonded thereto. The etched workpiece is at least partially embedded in a layer (46) of the abrasive particles in a first plating bath (20) comprising an aqueous solution of metal ions (22) and an electromotive force is imposed across the workpiece and an anode (34) so that the abrasive particles become partially embedded in the cavities in the workpiece surface as metal is plated on to the surface and around the abrasive particles adjacent to the surface. A second plating of metal in a second plating bath (40) securely bonds the particles to the workpiece and can provide the workpiece with a predetermined hardness for a particular application. The dual bonding process can be repeated for each layer to make multilayered tools.






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