Metal-working tool using electrical heating

A metal-working tool held in a metal clamp means, for machining a workpiece so that a chip is sheared from the shear zone thereof, comprising:

• a high-strength electrically conductive frame having at least one upper surface having a metal-working region which has a cutting edge thereon;
• a core, integral with and within said frame, having an upper extension projecting above said upper surface of said frame, said core being spaced from the workpiece by said frame, said core being formed from an electrically conductive material and said frame and core being formed with an internal fluid passage means having an exit port, said passage and port being located proximate said cutting edge;
• and
• means for connecting said tool to one terminal of a source of electical current and said workpiece to the other terminal of said source,
• whereby, when the tool is shearing a chip from said workpiece and wherein the chip has not been broken at the shear zone, the chip comes in contact with the core extension, so that electric current can flow, not only through the frame and cutting edge to the shear zone of the workpiece, but especially through the core and chip to the shear zone.