ELECTRIC ARC IGNITING METHOD

摘要

FIELD: welding processes and equipment, namely method for igniting DC arc by means of consumable electrode at automatic or semiautomatic welding. ^ SUBSTANCE: method comprises steps of setting extension of consumable electrode; turning on circuit for power supply of arc by electric current 1.5 - 6 A at inductance of welding circuit 5 - 15 mH and at discharge of capacitors with capacitance 1000 - 2000 mcF. Electric arc is ignited at touching by means of end of electrode with predetermined extension. After occurring on end of electrode extension liquid metal layer or drop, working arc power supply circuit is turned on and circuit for power supply of arc with electric current 1.5 - 6 A is turned off. Presence of solidified metal drop whose diameter exceeds that of electrode by 1.5 - 2.5 times on end of electrode corresponds to stable ignition of arc. ^ EFFECT: simplified process of arc ignition, stable ignition at presence on end of electrode solidified metal drop. ^ 1 ex