Shear device and method for detecting magnetic pulse welding connector performance

The invention relates to a shear device and method for detecting magnetic pulse welding connector performance, belongs to the technical field of mechanical performance testing device and welding, andsolves the problem that an existing shear device cannot detect the strength distribution of a welding connector connecting area. The shear device comprises a pressing rod and a base and is characterized in that a pressed block and a sample positioning piece are sequentially arranged on the base from bottom to top; the pressed block is provided with a first through hole with a first hole diameter,the sample positioning piece is provided with a second through hole with a second hole diameter, the first hole diameter is smaller than the first hole diameter, and the first through hole and the second through hole are concentric; the first hole diameter is larger than the outer diameter of an inner pipe and smaller than the outer diameter of an outer pipe; the rod diameter of the pressing rod is smaller than the outer d