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An expandable, grip tip having a head with a knurled peripheral surface is expanded within a predrilled opening in a graphite electrode blank to secure the grip tip to the electrode blank. The grip tip is then mounted in an electrode shank, with the electrode blank flush against the end of the shank

An expandable, grip tip having a head with a knurled peripheral surface is expanded within a predrilled opening in a graphite electrode blank to secure the grip tip to the electrode blank. The grip tip is then mounted in an electrode shank, with the electrode blank flush against the end of the shank to seal off dielectric fluid. To enable the mounting of the electrode blank onto the shank, the grip tip is locked in a loading fixture and the electrode blank mounted on the knurled head of the grip tip. A projection on the loading fixture recesses the knurled head of the grip tip from an end face of the electrode blank. When mounting the grip tip and electrode blank onto the shank, there is always a space between the end of the shank and the knurled head of the grip tip. This ensures that the electrode blank is mounted squarely and flush against the end of the shank.

대표청구항 ▼

A grip tip for mounting an electrode blank onto an electrode holding shank, said grip tip comprising: an elongated cylindrical body having a knurled head for engaging and gripping a smooth-walled bore of an electrode blank, said body being split by axially and radially extending grooves into a plura

A grip tip for mounting an electrode blank onto an electrode holding shank, said grip tip comprising: an elongated cylindrical body having a knurled head for engaging and gripping a smooth-walled bore of an electrode blank, said body being split by axially and radially extending grooves into a plurality of sections, and said body being hollow and internally threaded, and an internal set screw being threadingly mounted in said internal threads of said body for rotation and movement along a longitudinal axis of said body to engage and force radially outwardly said plurality of sections of said knurled head, said set screw being hollow for passage of dielectric fluid therethrough.