Special fixture for cutting gear ring and gear blank

The utility model relates to the technical field of clamps, in particular to a special clamp for cutting a gear ring and a gear blank, which comprises a base, a mounting plate, a support ring, a bulge, a baffle and a fastening nut, the mounting plate is obliquely fixed on the upper surface of the base, and a notch for a cutting knife to pass through is arranged on the mounting plate. A supporting ring is fixed to the upper surface of the mounting plate, the tail end of the protruding part is fixedly connected with the mounting plate, the protrusion is eccentrically arranged in the supporting ring and located between the central axis of the supporting ring and a notch, the baffle is slidably mounted on the protrusion, and the fastening nut is rotatably mounted at the end of the protrusion. And the eccentric direction faces the notch, so that the fixing point of the baffle for fixing the gear ring gear blank is close to the cutting position, shaking of the gear ring gear blank at the cutting position is reduced