Development of a science-based technology for the manufacture of sheet panels with fasteners

Abstract

An analysis was made of the application of Stud Welding hardware welding technologies depending on the welded structures used, the duration of the process, the shape of the stud butt and the consumables used. The use of CD Stud Welding technology for welding metalware to thin-sheet panels is substantiated. The essence of the process of formation of a welded joint is described, which consists in the explosive evaporation of a protrusion at the end of a hardware during the discharge of capacitor banks, the excitation and burning of an electric arc in the metal vapors of the parts to be welded, their convergence when the spring mechanism overcomes the pressure of metal vapors, the immersion of the hardware into the weld pool of the part with subsequent crystallization molten metal in the liquid phase. The spring mechanism was calibrated using a compression dynamometer. The flowing pulsed current was registered depending on the input energy of the discharge of capacitor banks. The main parameters of the capacitor welding mode are determined and the dependences on the input energy and preliminary static pressure are established. The indicator of mechanical tests was taken as a quality parameter - the pull-off force. The effect of metal vapor pressure, which counteracts the convergence of welded parts, is revealed. Dependences of opposing pressures to the convergence of welded parts are constructed.