МЕТОДИКА РОЗРАХУНКУ ІНДУКЦІЇ ПОЗДОВЖНЬОГО МАГНІТНОГО ПОЛЯ ПІД ТОРЦЕМ ФЕРОМАГНІТНОГО ЕЛЕКТРОДА СТОСОВНО ДО ДУГОВОГО НАПЛАВЛЕННЯ

Abstract

It is shown that at present there are no simple calculation methods to determine the magnetic field structure in the zone under the ferromagnetic electrode end during arc surfacing with wire under flux. There are publications that have shown the possibility of solving this problem, using the analogy between the magnetostatic field and the electrostatic field. To determine the structure of the longitudinal magnetic field (LMF) under the ferromagnetic electrode end as part of an input device (ID) of the LMF, this method was used, based on the indicated analogy of these fields. The components of the field intensity under the ferromagnetic electrode end were determined using the laws of electrostatics in the developed technique. If the product is made of non-magnetic material, then the longitudinal and transverse components of the electrostatic field intensity were determined at the points below the electrode end as part of the ID LMF. The same charges q were placed on the end surface of the electrode and its side surface near the end (a total of 6 charges were used). At certain points, the values of the longitudinal and transverse components of the field intensity from the action of each of the 6 specified charges were determined. To obtain the full values of the field intensity components, their values from the action of each of the 6 charges were summed up. If the product is made of ferromagnetic material, then the method of reflections was used to determine the electrostatic field intensity component. In this case, mirror reflections were introduced from the surface of the conductive plate of the electrode section, on which 6 charges were placed similarly distributed on its surface. These charges were the same in value, but negative. At the points under the electrode end to the plate surface, the effect of these negative charges was taken into account (added) when calculating the components of the field intensity. The performed calculations showed a good convergence of the components of the electrostatic fieldintensity with the induction components that are generated by the ID LMF under the ferromagnetic electrode end. A previously established experimentally confirmed conclusion is that under theferromagnetic electrode end, the value of the LMF transverse induction component reaches half the value of the longitudinal induction component of this field.