Friction welding pressurizing tool

The invention belongs to the technical field of welding tools, and particularly relates to a friction welding pressurizing tool which comprises a clamp assembly and a pressure adjusting assembly. The clamp assembly comprises a clamp base, a hydraulic cylinder installed on the side of the clamp base, a material carrying table fixed in the clamp base, a fixed clamping plate assembled on the hydraulic cylinder and a hydraulic oil pipe connected to the hydraulic cylinder. The two groups of clamp assemblies are symmetrically arranged up and down, and a hydraulic rod is connected to the upper group of clamp seat; through the clamp assembly and the pressure adjusting assembly, after the hydraulic rod is directly driven to press downwards, the pressure is associated with the oil pressure in the oil chamber, when the pressure of the hydraulic rod is too large, the pressure adjusting spring is compressed, meanwhile, the piston plate displaces in the oil chamber, and when the pressure of the hydraulic rod is too small,