Resistance welding apparatus, resistance welding method, and projection shape for projection welding

摘要

In the joining of conductors by resistance welding, a resistance welding apparatus and a resistance welding method capable of judging the quality of the joining, and the shape of the projection used for projection welding suitable for the judgment of the quality of joining are provided. In order to improve the electrical reliability and mechanical joint strength by using the resistance welding device, the resistance welding method, and the shape of the projection used for projection welding for the connection of the conductor of the electric power steering device, The resistance welding apparatus (1000) is provided with a moving amount measurement unit (1007), measures the distance before and after joining to the conductors (1004, 1005) to be joined, and evaluates the quality of joining based on the distance. At the same time, in order to easily secure the interval between the conductors after joining, the base (210) and the projecting surface (23 ) Projections (200) consisting of a provided.