Illinois Tool Works Inc.
METHODS FOR WIRE SURFACE OXIDATION REMOVAL AND/OR WIRE PREHEATING USING POLYPHASE ELECTRIC ARC PREHEATING

Abstract:

An apparatus and system for preheating and removing surface oxidation of welding wire using electric arcs one via three or more tungsten electrodes connected to a polyphaser preheating power source is disclosed. Electric arc preheating of welding wire allows increased efficiency and deposition rates.