Automatic clamping fixture

The utility model belongs to the technical field of turbine machining, relates to an automatic clamping fixture, and aims to solve the problems of inconvenience in clamping and direction adjustment in the background technology, and adopts the following scheme that the automatic clamping fixture comprises an operation table, two guide rods are mounted at the top of the operation table, and guide sliding blocks are mounted on the two guide rods in a sliding manner; a clamping assembly is fixed to the top of the guide sliding block, and an electric sliding block is installed below the clamping assembly and installed on the electric guide rail in a sliding mode. When the blade is located in the center of the annular sliding block, the four telescopic air cylinders on the two sides are used for clamping and positioning the arc-shaped blade, the stability of the blade can be guaranteed, clamping is rapid, a large amount of time can be saved, and after clamping and fixing are completed, when the position of the blad