The Paton Welding Journal, 2007, №02

2007 №02 (06)

2007 №02 (08)

---

The Paton Welding Journal, 2007, #2, 32-37 pages

Peculiarities of outflow of two gas flows from nozzles of welding torches in automatic consumable electrode welding

S.T. Rimsky

E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.

Abstract
Laser-interferometry and shadow methods were used to study structure and character of outflow of argon and carbon dioxide flows, simultaneously outflowing onto the flat barrier from the internal and external nozzles of flat configuration with different geometry of the channels. Optimal combinations of rates of the internal and external shielding gas flows and efficient designs of the torch nozzles were found. Design of the torch for welding under forced conditions in a double flow of shielding gases, ensuring efficient shielding of the welding zone from air at currents up to 900 A and low flow rates of argon and carbon dioxide, is suggested
Keywords: arc welding, consumable electrode, shielding gases, gas flow rate, double-layer shielding, gas shielding efficiency, optical methods, forced conditions, porosity of welds, design of torches

References

1. Ardentov, V.V., Fedorenko, G.A. (1973) On jet protection in gas-arc welding. Svarochn. Proizvodstvo, 1, 3–5.
2. Bezbakh, D.K. (1969) Study of gas jets in gas-shielded welding. Avtomatich. Svarka, 6, 3–32.
3. Petrov, A.V., Shtrikman, M.M. (1961) Study of shielded gas jet parameters in arc welding. Svarochn. Proizvodstvo, 5, 5–8.
4. Starchenko, E.G., Lyubavsky, K.V. (1968) Influence of torch nozzle design on efficiency of gas shielding of welding zone. Ibid., 11, 13–16.
5. Kasatkin, B.S., Lobanov, L.M., Ivanova, O.N. et al. (1980) Investigation of shielding gas flows in welding torches using the holographic interferometry. Avtomatich. Svarka, 2, 15–18.
6. (1982) MAGGI – a novel shielded arc welding process. Metal Construction, 10, 550–553.
7. Rimsky, S.T., Svetsinsky, V.G., Ulianov, V.I. Conical nozzle for welding torch. USSR author’s cert. 518299. Int. Cl. B 23 K 9/16. Publ. 25.06.76.
8. Novozhilov, N.M. (1979) Principles of metallurgy of shielded-gas arc welding. Moscow: Mashinostroenie.
9. Pidgaetsky, V.V. (1970) Pores, inclusions and cracks in welds. Kyiv: Tekhnika.
10. Svetsinsky, V.G., Rimsky, S.T. (1984) Welding of girth joints on multilayer pipes in shielded gas mixture Ar + O2 + CO2. In: Proc. of All-Union Conf. on Multilayer Weld2ed Structures and Pipes. Kiev: Naukova Dumka, 177–182.

---

Suggested Citation

S.T. Rimsky (2007) Peculiarities of outflow of two gas flows from nozzles of welding torches in automatic consumable electrode welding. The Paton Welding J., 02, 32-37.

---