Welding of Toroidal Cores Made out of Amorphous Alloy Using Capacitor Discharge Spud Welding Technology (CD Welding)

Amorphous alloys exhibit exceptional characteristics not typically associated with other known classes of materials. These alloys are industrially manufactured in the form of ribbons with thicknesses below 50 μm, which presents challenges in their welding process. Resistance spot welding utilizing energy stored in capacitors is employed for thin sheets or foils due to it’s precise energy control during capacitor discharge. This paper presents the findings from experimental research conducted on spot welding metallic amorphous ribbons with a thickness of 30 μm using stored energy in capacitors, aiming to establish effective welding technologies. Several tests with varying parameters were conducted to optimize the welding process and determine the most effective technology for this foil.