Avtomaticheskaya Svarka (Automatic Welding), #12, 2019, pp.25-32
Features of arc with pulsed self-regulation of electrode melting process in relation to manual arc welding
S.Yu. Maksimov, V.S. Sydoruk, D.M. Krazhanovsk
E.O. Paton Electric Welding Institute of the NAS of Ukraine,
11 Kazymyr Malevich Str., 03150, Kyiv, Ukraine. E-mail: firstname.lastname@example.org
Article deals with the problem of providing stability of the electrode arc melting process with respect to welding or surfacing technology. The task of the work is to find a technical solution to the use of the method of pulsed self-regulation of the electrode melting process previously proposed for mechanical welding and surfacing, in manual arc welding using coated electrodes. To solve the specified problem, it was proposed to use a current source assembled from serially manufactured components, in particular, transformers of the brand OSM with the power of 1 and 1.6 kVA with the idle voltage of 14 V. The electric parameters of the arc and the peculiarities of the electrode melting process were experimentally studied in comparison with those that occur in the case of using the traditional current source VDU-306. The peculiarity of the proposed source is that it is a source of pulsating DC voltage, which is powered from 220V single-phase mains. It was shown that the process was equally stable both in case of mechanised welding in carbon gas, as well as during manual welding using electrodes for direct current under the conditions, which are substantially lower than those recommended by the developers of electrode material. The proposed circuit of power supply provides the ability to vary the value of the current over a wide range, which will extend the technological possibilities of welding, including larger gaps between the edges and in different spatial positions. As compared to the process of welding with the power from VDU-306, welding from an experimental source is more power-saving. The circuit diagram can be of interest to both small enterprises as well as to individual enterpreneurs. 15 Ref., 1 Tabl., 5 Fig.
Keywords: self-regulation, electrode melting process, electric parameters, arc oscillatory character, droplet overflow, complex current source, volt-ampere characteristic, oscillation pattern, histogram, breaking arc length
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