Projection Welding Current And Voltage. Different shielding gases may further affect the weld as well. The operating pressure during the resistance projection welding process was set between 010 and 035 MPa at intervals of 005 MPa.
Its maiucircuit consists of apower switch and a transformer. An altemating current AC welder is selected as the welding powersupply. With projection welding the welding machine is a spotprojection welder with typically a 50 kVA transformer and a projection load of some 450 kgcm 2 Shogan et al.
Van Walle in Encyclopedia of Materials.
Major welding variables in projection welding include current time force electrical resistivity thermal conductivity interfacial resistance projection diameter height and shape as well as strength at different temperatures of the metal being welded. In Projection Welding size and shape of individual welds are determined by the presence of projections embossments or intersections on the metals to be joined. By billvanderhoof Date 04-30-2004 0306. In projection welding the pieces to be joined are clamped.