Apparatus for electric-arc gas-shielded surfacing by droplets with consumable electrode

摘要

PCT No. PCT/SU79/00079 Sec. 371 Date Oct. 28, 1980 Sec. 102(e) Date Oct. 28, 1980 PCT Filed Aug. 30, 1979 PCT Pub. No. WO80/01772 PCT Pub. Date Sep. 4, 1980.An apparatus for electric-arc gas-shielded surfacing by droplets with consumable electrode calls for an electrode to be fed through a current contact tip to the surface of an article being surfaced. An arc is ignited to form a molten droplet on the end of the electrode, and a shielding gas is fed into the melting zone. Subsequently, an accelerating translatory motion is imparted to the current contact tip and the electrode until they reach a speed at which the kinetic energy of the molten droplet exceeds the energy sufficient for detaching the droplet from the electrode, whereafter the tip and the electrode are stopped by a fixed barrier so that inertia causes the droplet to detach from the electrode. The apparatus includes an electrode feeding mechanism, a nozzle, a drive for imparting accelerating translatory motion, a fixed barrier arrester, an electrode holder, clamping members and a pusher.