Clamp for milling shear pin type safety valve body groove

The clamp for milling the valve body groove of the shear pin type safety valve comprises a workbench, a T-shaped groove is formed in the upper surface of the workbench, a T-shaped nut is arranged in the T-shaped groove, a base is arranged on the workbench, a through hole a perpendicular to the upper surface of the base is formed in the middle of the base, a mandrel is arranged in the through hole a and is of a cylindrical structure with the thin upper portion and the thick lower portion, and through grooves a are formed in the two ends of the base. An eccentric wheel perpendicular to the mandrel is connected into the through groove a through a pin shaft and slightly protrudes out of the bottom face of the base, a handle is fixedly connected to the side face of the eccentric wheel, and a boss b is arranged at the position, close to the through hole a, of the side face of the base and connected with an L-shaped limiting block through a threaded pin shaft. The clamp for valve body groove milling can achieve mill