Micro-pin Electrodes Formation by Micro-Scanning EDM Process

In recent micro-EDM processes various kinds of thin tool manufacturing methods, including the wire electrical discharge grinding (WEDG) have been proposed to satisfy the growing need for very thin tools. This study describes a new thin tool micro-formation by EDM where a rod electrode is driven through the center of a controlled slit formed between two electrically isolated metal plates to provide a critical path for the rod electrode tool during the process. A micro-pin of the desired shape and diameter is obtained, under stable conditions, in a very short time interval.