On a release, which is a part of a motor protective switch, five welds among dissimilar materials has to be carried out. For economical reasons the welds need to be produced using the same source, but with different welding parameters. In the present paper a concept of a resistance spot welding station (RSW) is introduced, which uses one welding source supplying 4 workplaces. This approach allows the use of a relatively expensive inverter source in a very cost sensitive application and can be employed in RSW of similar and dissimilar materials. The benefits of using inverter source are a better stability of the weld initiation and flexible tailoring of the welding current waveform and value to suit the requirements of the process. The document also presents determination of the process parameters for welding one particularly critical RSW weld. There are 51 different welds within the whole protection switch family and they are all produced using the same station. The reported application was successfully launched into regular production.
Development of a system for resistance welding of multiple dissimilar joints in a motor protection switch
Welding in the World ; 52 , 3/4 ; 37-42
2008
6 Seiten, 11 Bilder, 2 Tabellen, 8 Quellen
Aufsatz (Zeitschrift)
Englisch
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