Calculation of Modes of Arc Welding under the Flux of Double-Sided Butt Joints

This paper gives the analysis of energy costs for arc automatic welding under the flux of double-sided butt joint without edge preparation according to the thickness of welding sheets. The coefficients for a linear dependence of specific energy from plate thickness are obtained. From this, a calculation method of effective power, current and arc voltage is proposed according to the joint formation speed. To calculate a fusion area of a weld section, a model of a surficial normal-circular heat source with an average heat flow in a heating spot 14−16 kW/cm2 is used. Acceptable convergence of target and experimental cross-section areas of a weld is achieved for an arc reverse polarity. Calculation method let take into account the influence of arc polarity on a fusion area of a base metal. Main efficiency factors of a double-sided welding are defined. Possible reasons of augmentation of fusion effectiveness of a base metal in comparison with the electrode metal are noted.