ИССЛЕДОВАНИЯ ВЛИЯНИЯ ЧАСТОТЫ ВРАЩЕНИЯ ЭЛЕКТРОДА НА ТОЛЩИНУ ЭЛЕКТРОИСКРОВЫХ ПОКРЫТИЙ ПРИ РАЗЛИЧНЫХ РЕЖИМАХ ЭЛЕКТРОИСКРОВОЙ ОБРАБОТКИ ПОВЕРХНОСТЕЙ

Abstract

The article presented actual problems studies of the thickness of electro spark coatings depending on the specified processing modes of the electro spark installation with a change in the frequency of rotation of the electrode. We propose to optimize the values of the parameters of the electro spark installation model SZ-8100, current frequency, current cycle pulse duration and frequency of rotation of the electrode to increase the thickness of the electro spark coating. As a result of experimental studies, the following results were obtained: the most thickness of the electro spark build up obtained at a pulse duration timp = 100 microseconds, voltage U = 60V, current frequency f = 300 Hz, at an electrode rotation frequency n = 260 min–1 and it is 1.88 mm (along the roughness vertices). In experimental studies, it was found that the current frequency parameter has a significant effect on the temperature regime of heating the surfacing electrode. Electro erosive destruction of particles by an electro spark processing, with an increase in the current frequency parameter, occurs. An increase in the pulse duration timp from 50 microseconds to 100 microseconds contributed to an increase in the thickness of the electro spark build up by 0.84 mm. It was found that in the case of an increase in the rotation frequencies of the electrode on the electrode holder, the tops of the formed electro spark grind polished, cooled faster and the thicknesses of electro spark coatings obtained with lower productivity. The smallest thicknesses of the electro spark build up formed at low values of the current frequency at f = 50 Hz, in both modes of the current duty cycle timp = 50 microseconds, timp = 100 microseconds and the formation of the thickness of the electro spark build up in the aisles varies from 0.04 mm to 0.45 mm. This study will help to choose the optimal values of the parameters of the electro spark installation, and increase the productivity of the process obtaining an effective thickness of the electro spark coating.