Positioning device for industrial robot to machine parts

The utility model discloses a positioning device for parts machined by an industrial robot, and belongs to the field of machining. A positioning device for an industrial robot to machine parts comprises an outer shell, an electric telescopic rod is arranged in the outer shell, a plurality of connecting claws are annularly arranged at the upper end of the electric telescopic rod at equal intervals, a sliding groove is formed in the upper portion of each connecting claw, a sliding rod is arranged in each sliding groove, a connecting plate is connected to the inner side of each sliding rod, and a U-shaped extrusion block is connected to the inner side of each connecting plate. Two reset springs are symmetrically connected to the outer side of the extrusion block, a limiting circular ring is connected to the upper portion of the outer shell, a plurality of limiting grooves are annularly formed in the surface of the limiting circular ring at equal intervals, T-shaped sliding blocks are arranged in the limiting gro