The Paton Welding Journal, 2020, №09



2020 №09 (07)

DOI of Article 10.37434/tpwj2020.09.08

2020 №09 (01)

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The Paton Welding Journal, 2020, #9, 43-48 pages

Processes occurring at excitation of the welding arc (Review)

N.M. Makhlin

SC «REC Welding and Control in Nuclear Power of the E.O. Paton Electric Welding Institute» 11 Kazymyr malevych Str., 03150, Kyiv, Ukraine. E-mail: electro@paton.kiev.ua

Abstract
In view of the fact that a complete theory of the process of welding arc excitation, which could provide a convincing explanation of the entire totality of the known facts is absent so far, some important theoretical and experimental data of different authors are considered as regards the processes of initial excitation of the welding arc in arc and plasma welding which is important for designing electronic boosting devices, generating pulses of high and higher voltage that are injected into the interelectrode gap to ensure contactless initial and repeated excitations of the welding arc. Requirements to pulse parameters that are generated by these devices are given, which are obtained on the base of many investigations (including theoretical studies), experience in designing and application of boosting devices. Analytical expressions are proposed to create the theory of the process of dC welding arc excitation. 15 Ref. Keywords: welding arc excitation in arc and plasma welding, glowing, spark and arc discharges, initial ignition voltage, repeated excitations of AC arc, combined devices - exciters-stabilizers, energy, amplitude, pulse duration

Received 10.08.2020

References

1. (1986) Equipment for arc welding: Refer. Book. Ed. by V.V. Smirnov. leningrad, Energoatomizdat [in Russian].
2. Temkin, B.ya. (1981) Theory and calculation of welding arc exciters: Syn. of Thesis for Cand. of Tech. Sci. degree. leningrad [in Russian].
3. Rajzer, yu.P. (1987) Physics of gas discharge. moscow, Nauka [in Russian].
4. gvozdetsky, V.S. (1969) To the theory of cathode processes in electric arc. Avtomatich. Svarka, 1 (Pt 1), 33–37; 6, (Pt 2), 1–4 [in Russian].
5. (1980) Electrotechnical reference book. In: 3 Vol., Vol. 1: general problems. Electrotechnical materials. Ed. by V.g. gerasimov, P.g. grudinsky, l.A. Zhukova, et al. 6st Ed. moscow, Energiya [in Russian].
6. Paton, B.E., Zaruba, I.I., dymenko, V.V., Shatan, A.F. (2007) Welding power sources with pulsed stabilization of arc burning. Kiev, Ekotekhnologiya [in Russian].
7. Farson, D., Courardy, C., Talkington, J.et al. (1998) Arc initiation in gas metal arc welding. Welding Res. Supl., 8, 315–321.
8. Kesaev, I.g. (1968) Cathode processes in welding arcs. moscow, Nauka [in Russian].
9. Krivtsun, I.V. (2018) Anode processes in welding arcs. The Paton Welding J., 11-12, 91-104. https://doi.org/10.15407/tpwj2018.12.10
10. Leskov, G.I. (1970) Electric welding arc. Moscow, Mashinostroenie [in Russian].
11. Leskov, G.I., Lugin, V.P. (1971) Investigation of voltage breakdown of gaps between welding electrodes. Svarochn. Proizvodstvo, 2, 10-11 [in Russian].
12. Makhlin, N.M. (2015) Peculiarities of contactless ignitions of alternating current arc. The Paton Welding J., 10, 29-35. https://doi.org/10.15407/tpwj2015.10.05
13. Weinshehk, H.E., Schellhase, m. (1971) Wiederzundugscharacteristiken von Schwießlichtbogen mit abschmelzen der Elektrode. ZIS-Mitt., 13(12), 1706–1720.
14. Korotynskyi, O.E. (2007) High-efficient power sources for arc welding on the base of inductive-capacitive transducers: Syn. of Thesis for dr. of Tech. Sci. degree. Kyiv [in Ukrainian].
15. Pokhodnya, I.K. (1967) Electrode melting and interaction of metal with gases in arc welding: Syn. of Thesis for dr. of Tech. Sci. degree. Kiev [in Russian].

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