Abstract: A one-sided spot welding device having a concentrically arranged weld electrode assembly and an electromagnet for clamping together and holding metallic parts during a one-sided spot welding process. A device of the present invention may include a mounting base having a central weld electrode and an outer, concentrically arranged weld electrode extending therefrom. The outer weld electrode may surround or partially surround the central electrode, with some gap therebetween. The central electrode is associated with an actuator that is provided to press a tip of the central weld electrode against a metal component to be welded. An electromagnet resides between the central and outer weld electrodes of the electrode assembly to draw metal components into tight abutting contact and to hold the components in contact with the outer weld electrode during welding.

Abstract: An automobile manufacturing line is provided which comprises a first assembly line, a second assembly line positioned parallel to the first assembly line on one side thereof, and a third assembly line positioned parallel to the first assembly line on the other side thereof. A first conveyor is located between the first and second assembly lines for carrying workpieces from the end of the first assembly line to the beginning of the second assembly line, and a second conveyor is located between the second assembly line and the third assembly line for carrying workpieces from the end of the second assembly line to the beginning of the third assembly line. The first assembly line, the first conveyor, the second assembly line, the second conveyor, and the third assembly line are arranged in a substantially spiral configuration. The first and second conveyors are overhead conveyors such that parts and workpieces can be transported to the assembly lines by passing underneath the conveyors.