METHOD FOR REAL TIME DYNAMIC DIAGNOSIS AND DECISION ASSISTANCE, FOR AN ELECTRIC DIRECT SPARK BUTT ELECTRIC WELDER AND ITS WELD SEAMS

摘要

The invention concerns a method for data acquisition, in the form of measurements and calculations, of diagnosis and decision assistance for a direct spark butt electric welder and for the resulting weld seams comprising respectively steps which consist in: measuring the instantaneous alternating voltage at the terminals of primary winding (19, 33) and of the secondary winding (16, 35, 36) of the welder transformer, and between the jaws (18, 39) of the welding die; measuring the instantaneous current in the transformer primary winding (24, 34) and secondary winding (17, 37, 38); measuring the instantaneous displacement (41, 42) of the mobile die (4); storing said voltages, said currents and said displacement during the welding process; calculating the power supplied by the secondary winding to the dies and the heat energy dissipated during the electric spark welding, based on the displacement of the mobile die; calculating the power efficiency and based on said measurements and calculations, automatically establishing a real time diagnosis (68, 74, 78, 79, 80) with or without interactive intervention of an operator, concerning the quality of at least one weld seam which has just been produced by the welder.