Using modern software for welding mode calculations

The paper describes the application of MathCAD mathematical package in the training of welding engineers. It also disclosers software application for calculating and optimizing welding modes. MathCAD mathematical package differs from the others by the simplicity of the syntax and the relative ease of usage allowing it to be used both for educational purposes and for solving engineering problems. The task for practice with students is the construction of thermal cycles and temperature fields in metal when it is exposed to an instantaneous point heat source, moving heat sources and calculation of the zone melting size, instantaneous cooling rate, time the metal stayed at a temperature above the preset level, etc. At the end of the course on computer modeling a student makes a term paper under the supervision of an instructor. This term paper can be used by a student when performing individual tasks. The use of the calculation algorithm ready for the term paper aimed to raise interest to the use of computer technology in engineering practice. For engineers and specialists in welding the usage of MathCAD mathematical package can be used for calculation and optimization of welding modes. Calculation model of welding modes is based on a strict coordination of the value of area of weld metal with structurally defined geometrical characteristics of the welded connection and the estimated parameters of the welding mode. This was achieved by solving a system of well-known equations that eliminate calculation errors related to the conflict between the initial and final design parameters. The calculation results were displayed in the form of a table that summarizes all the parameters of the weld joint and welding, as well as auxiliary indicators that can be used to estimate material and energy costs. Table design parameters are useful for analysis and optimization of welding modes. Mode correction can be made by changing the diameter of the electrode, the type and polarity of the current, the type of welded joint or the desired value of the shape factor of the weld.