METHOD OF AN APPARATUS FOR FRICTION STIR SPOT WELDING WITH ADAPTED NUMBER OF SHOULDERS WITH RESPECT TO THICKNESSES OF PLATES TO BE SPOT WELDED

摘要

The present invention describes a kind of method and apparatus at least two metal plates (2,3) friction stir spot to be welded together. Using towards the swedged tool of welding ends (7) staged (5). Each staged reduction amount of diameter limits shoulder (9-15). First shoulder (9) is located at welding ends (7) at a distance of greater than zero and less than metal plate (2, one of 3) distance (x) place of minimum thickness (Wmin), and, quantity is than the metal plate (2 to be connected, 3) shoulder (9-15) more than quantity is located at interior with welding ends (7) distance (L), the distance (L) is less than metal plate (2,3) maximum gauge (Wmax) subtracts one product with the quantity of the metal plate to be connect (2,3).