A mathematical model for the melting rate in welding with a multiple-wire electrode

The paper deals with the development of a mathematical model for the calculation of melting rates obtained in gas-shielded are welding with a multiple-wire electrode or in submerged are welding with a multiple-wire electrode. The first part provides a very general and short description of welding with a multiple-wire electrode, the main advantages and characteristics, as well as variants of welding with a multiple-wire electrode applicable in practice to various cases. The major part of the paper treats the development of the mathematical model for the calculation of the melting rate on the basis of the physical principles of the welding are and of the wire extension heating due to current conduction and mutual influence of the welding arcs. Finally, a comparison is made between the melting rate results obtained by practical measurements and those obtained theoretically by the mathematical model. The mathematical model for the calculation of melting rates in welding with a multiple-wire electrode is accurate enough to be used in practice and for further studies.