Special fixture for heat treatment of automobile piston rings

The utility model discloses a special fixture for heat treatment of automobile piston rings. The fixture comprises a chassis and a positioning rod standing on the surface of the chassis, wherein the central part of the chassis is provided with a through hole; the cross section of the positioning rod is in a T shape; and the positioning rod consists of a clipping part and a limiting part, wherein the length of the clipping part is matched with that of a free opening of the piston ring, and the width of the clipping part is larger than the radial thickness of the piston ring; and the limiting part is arranged at the side where the clipping part is close to the centre of the chassis, and the length of the limiting part is larger than that of the clipping part. When the fixture is used, the free opening of the piston ring is matched with the clipping part, and the piled piston rings form a hollow cylinder shape, so that when the heat treatment is carried out, the inner and outer walls of the piston rings can be e