Special-shaped part positioning clamp for welding thin-wall air pipe

The utility model discloses a special-shaped part positioning fixture for welding processing of a thin-wall air duct, which comprises a base, two guide rails are symmetrically mounted on the outer wall of the top of the base, guide seats are slidably connected to the outer walls of the guide rails, the same sliding seat is fixedly connected to the outer walls of the tops of the two guide seats, and a fixed seat is fixedly connected to the outer wall of the top of the base. Two clamping assemblies are arranged between the fixed seat and the sliding seat, each clamping assembly comprises two clamping blocks which are symmetrically arranged, a cavity is formed in each clamping block, the air pipes can be simply and efficiently clamped and disassembled through the clamping assemblies, and the air pipes of different shapes can be clamped and fixed through the action of reset springs; according to the air duct compression device, the air duct is prevented from deviating in the compression process, the rubber part c