METHOD OF JOINING BY ROLLER HEMMING AND SOLID STATE WELDING AND SYSTEM FOR SAME

摘要

A method of joining a first and a second work piece, such as automotive closure panels, includes supporting the work pieces on a fixture, and then joining the work pieces to one another by a first solid state weld with a vibrating roller head of a tool assembly, such as a robotically-controlled ultrasonic seam welder. Next, a flange of the second work piece is hemmed about an outer periphery of the first work piece using the same or a different roller head with the work pieces supported by the fixture. The hemmed flange is then joined to the first work piece by a second solid state weld with the vibrating roller head of the robotically-controlled ultrasonic seam welder. A system for joining a first and a second work piece is also provided.