Patent ID: 9089915
Filing Date: 2015-07-28
Classification: B23H,B32B,Y10T

Abstract:
1. A method for creating a multi-piece bonded graphite blanks comprising the steps of: determining the size and shape of a backer substrate with respect to a holding fixture; determining the size and shape of an electrode substrate; cutting two pieces of graphite into a desired shape to create a backer substrate and an electrode substrate; choosing a surface on the backer and electrode substrates to be placed back to back for bonding machining a first, chosen surface of the backer substrate flat in preparation for the adhesive; machining a first, chosen surface of the electrode substrate flat in preparation for the adhesive; applying a film of adhesive to the first machined surface of the electrode substrate in the same size and shape of the first machined surface of the backer substrate; placing the machined surfaces back to back for bonding; placing the bonding surfaces of the backer and electrode back to back and aligned; applying a mechanical pressure to the backer and electrode by a clamping device, heating the combined backer and electrode, now held together with the clamping device until the adhesive is cured; allowing the adhesive to cure; providing a cool down time upon completion of the heating cycle; and removing the clamping force from the finished EDM blank.