DEVICE AND METHOD FOR HOMOGENEOUSLY WELDING TWO-DIMENSIONALLY BENT STRUCTURES BY FRICTION STIR WELDING.

摘要

Method and device for homogeneously welding two-dimensionally bent structures in the form of two parts to be joined (6) by friction stir welding, with the following features: a) a receiving plate (1), which is guided by a guiding machine and has a drive head (2) and a cone element (3) fastened thereto and having a welding shoe mount (4) and a pin bearing (5) for a welding pin (11) of a welding shoe (8), serves for carrying out the method, b) to achieve a welding result without holes and with a satisfactory surface on both sides of the parts to be joined (6), the measuring parameters relevant to the control of the welding process are determined, wherein a strip-shaped sensor (23) is provided along the side of the cone element (3), wherein a sensor (20) for sensing the axial force is provided, wherein at least three sensors (25) in the form of strain gauge strips serve for measuring the axial force acting on the welding pin (11), and wherein a further piezoelectric force-measuring sensor (24), which likewise serves for measuring the axial force, is provided in the longitudinal axis of the shank (7) of the friction pin.