Abstract
The cutting tool is an automatic head for mechanized air-arc surface cutting (Fig. i) developed at the Plant; the cathode is a graphite electrode 50 mm in diameter and 950 mm long. As it burns down, the electrode is moved forward to the site of cutting by a feed mechanism which consists of a motor, reduction gears, and a pusher. Current is fed to the electrode by water-cooled contact shoes. The speed of graphite electrode feed as it burns down is regulated by the feed mechanism electric motor rheostat, which is mounted on the control panel. Compressed air pressure is measured with a manometer. The following operating routine is used to remove the surface hard facing layer:
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