The Paton Welding Journal, 2013, №12



2013 №12 (06)

2013 №12 (08)

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The Paton Welding Journal, 2013, #12, 39-41 pages

SYSTEMS OF PROCESS CONTROL AND MONITORING OF CONDITIONS - THE IMPORTANT FACTORS OF QUALITY ASSURANCE IN ELECTROSLAG WELDING OF THICK METAL

S.N. LITVINENKO¹, K.P. SHAPOVALOV¹, I.S. SAVCHENKO¹, S.N. KOSINOV¹, K.A. YUSHCHENKO², I.I. LYCHKO² and S.M. KOZULIN²

¹NKMZ Е Novo-Kramators Machine-Building Works. 4 Ordzhonikidze Str., 84305, Kramatorsk, Donetsk region, Ukraine. E-mail:shapovalov@nkmz.donetsk.ua
²E.O. Paton Electric Welding Institute, NASU. 11 Bozhenko Str., 03680, Kiev, Ukraine. E-mail: office@paton.kiev.ua
 
 
Abstract
At the NKMZ the installation, unique by its technical capabilities, is successfully used for electroslag welding of large-size parts, allowing manufacture of welded-cast, rolled-welded and welded-forged steel billets of weld section of up to 5000 Ф 6000 mm and weight of more than 100 t. The required quality of metal of welded joint is provided due to a strict keeping of preset welding condition parameters during the whole period of weld fulfilment without forced interruptions of the welding process. This is attained by a high reliability of operation of electric control circuit and drives of executive units of the installation, as well as by application of method of doubling the feeding of electrode wires into the zone of welding. Setting of selected condition parameters, control and visual inspection of the welding process are realized from two central panels, and also using the automatic system of welding conditions monitoring. The system of control represents a multi-functional complex, in which the control of parameters of the technological process (acquisition and processing of information) is realized by the controller SIMATIC S7-300, and the display of parameters, recording and record-keeping of accumulated information are realized by an industrial computer in a panel-type version PC 670 and text panels of operator OP 7. Software of the control system was developed using the Siemens package of programs WinCC V5.1 and operates under the control of operational system Microsoft Windows. 3 Ref., 6 Figures.
 
 
Keywords: specialized equipment for welding of thick metal, electroslag welding with consumable nozzle, control systems, monitoring of welding conditions, doubling of feeding the electrode wires, reliability in electroslag process fulfilment
 
 
Received:                10.07.13
Published:               28.12.13
 
 
References
1. Nevidomsky, V.A., Krasilnikov, S.G., Panin, A.D. et al. (2002) New machine for electroslag welding of large parts at JSC «NKMBF». The Paton Welding J., 2, 49-51.
2. Voloshkevich, G.Z., Sushchuk-Slyusarenko, I.I., Lychko, I.I. (1965) Increase in reliability of electroslag process in welding of long welds. Avtomatich. Svarka, 6, 50-53.
3. Kompan, Ya.Yu., Grabin, V.F., Abralov, M.A. et al. (1975) Electroslag welding of titanium alloys. Tashkent: Fan.

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