Chip breaker for polycrystalline CBN and diamond compacts
AssigneeGeneral Electric Company
InventorsDavid E. Slutz, Friedel S. Knemeyer
Life of this patent
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Abstract
An oversize compact blank having a surface and edges that establish it as oversized is provided. A chip breaker pattern is formed on the compact blank surface. Preferred means for forming the chip breaker pattern include use of a laser, a plunge EDM apparatus, or by ultrasonic abrading. Thereafter, the edges of the patterned oversized compact blank are finished to reduce the size of the blank. When pluge EDM apparatus fitted with a patterned plunger is used, the compact blank must be electrically conductive.
Claims6
A method for forming a chip breaker in a polycrystalline diamond or CBN compact which comprises:
- providing an oversize compact blank having a surface and edges that establish it as oversize;
- forming a chip breaker pattern on said surface of said oversize compact blank;
- and
- thereafter subjecting the edges of said patterned oversize compact blank to finishing to reduce the size thereof.
Dependencies are inferred from the claim text.