METHOD FOR ELECTRIC ARC WELDING BY MEANS OF CONSUMABLE ELECTRODE AND ELECTRODE FOR PERFORMING THE SAME Russian patent published in 2003 - IPC

FIELD: electric arc welding of rather thick metals welded with narrow gap. SUBSTANCE: method for electric arc welding by means of consumable electrode includes steps of placing electrode between welded parts, bringing welded parts together until contact with electrode; supplying voltage to electrode and to both welded parts; exciting arc between them and generating excessive pressure of vapors in welding zone. Insulation coating of electrode includes slag forming, vapor forming and gas forming non-metallic materials providing in arc zone flow of slag, vapor and gas emitting out of gap between walls of welded article and electrode whose motion is oriented in direction opposite to path of electrode fusion. Such method allows to improve well known welding method due to providing oriented flow of slag, vapor and gas, to enhance material and structure of electrode due to using predetermined quantity and relation of non-metallic materials for selecting composition of insulation coating and shape of electrode corresponding to that of butt, to shield, to insulate electric arc. EFFECT: enhanced efficiency and stability of welding process, improved quality of welded joint. 20 cl, 15 dwg, 21 ex