METHOD FOR CONNECTING STRANDED WIRES IN AN ELECTRICALLY CONDUCTING MANNER AND ULTRASOUND WELDING DEVICE

摘要

An ultrasound welding device and a method for connecting stranded wires in an electrically conducting manner with a metal U-shaped support by ultrasound welding, where the stranded wires are made of individual wires that are essentially aluminum. The sonotrode used according to the invention is a sonotrode has a welding surface which is shaped like an open trapezoid having short base sides as the bottom face during welding, the stranded wires directly contacting the bottom face and the lateral faces that extend therefrom and form an obtuse angle. The overall cross-sectional area F_L of the stranded wires inserted in the U-shaped support and the cross-sectional area F_S of the space surrounded by the bottom face and the lateral faces have a relationship F_SF_L2F_S in the welded state.