Welding test piece tearing fixture

The invention relates to a welding test piece tearing fixture. The welding test piece tearing fixture comprises a worktable, a tearing device and a cylinder, wherein the tearing device comprises a guiding seat provided with a T-shaped sliding chute, a fixed clamp seat and a movable clamp seat, wherein slots capable of containing the welding test piece are formed in the position, are close to the inner end, of the top part of the fixed clamp seat and the movable clamp seat; fastening bolts are screwed on the outer ends of the fixed clamp seat and the movable clamp seat along the direction of the T-shaped sliding chute; through rotating the fastening bolts, the cylinder is fixed on the worktable, the front end of a piston rod of the cylinder is connected with the outer end of the movable clamp seat. After the welding test piece is torn by the fixture, the diameter of a weld nugget can be indicated exactly, the efficiency of the test piece is improved, and the difficulty of sledging to detect the test piece is r