Optimization of short arc welding process during repair of railway rolling stock

Abstract

The operation of the arc ignition circuit at the welding and the formation start stages of small droplets has been optimized in order to increase the productivity and quality of the rolling stock parts repairing. The paper presents an analysis of the technological characteristics of long and short arc welding processes, control systems for melting and metal transfer. It is established the mutual influence of various process stages. It was experimentally proved that the depth of base metal penetration increased with decreasing electrode diameter due to widening in current density. Melting and metal transfer control systems are presented to optimize the short arc welding process. Materials on control systems are summarized and recommendations for optimizing the welding process are given.