Welding circuit for resistance welding machines working with alternated or unidirectional current, in particular to weld metallic boxes.

摘要

The present invention concerns a welding circuit that may be used in resistance welding machines working with alternated or unidirectional current, in particular to weld metallic boxes. Said device comprises a transformer (1), its exit charging clips (7, 8) are linked respectively to a first and a second electric jib (2,3), to a third electric jib that is linked to said first electric jib (2), said third electric jib supporting on its free end a welding rod (6), the latter being supported by said second electric jib (3). All three electric jibs (2,3,4) are geometrically set at minimum distance, said distance fulfilling the machine's geometrical demands as well as the values of electric entities concerning the very welding circuit, so that the area (S) delimited by the electric jibs be minimised. (Figure 1)