Test fixture for PDC (Polycrystalline Diamond Compact) brazing seam shear strength

The utility model discloses a test fixture for PDC (Polycrystalline Diamond Compact) brazing seam shear strength, and belongs to the technical field of test instruments. The test fixture for the PDC brazing seam shear strength comprises an upper support, a lower support and a lower support, wherein a rectangular pressing block is arranged at the bottom end of the upper support; the lower support is connected to a lifting table of the universal testing machine, a rectangular groove in the vertical direction is formed in the top face of the lower support and located under the rectangular pressing block, the rectangular pressing block can be inserted into the rectangular groove, a brazing sample hole in the horizontal direction is formed in the lower support, the brazing sample hole penetrates through the rectangular groove, a brazing sample can penetrate through the brazing sample hole, and the rectangular pressing block can be inserted into the rectangular groove. A threaded hole in the radial direction of the