This utility model relates to a
metal expansion joint welding processing device, including: a clamping mechanism and a guide rail; the clamping mechanism includes: a base, a turntable, clamping components, and a drive
assembly; the turntable is rotatably mounted on the base; the clamping components are slidably mounted on one end of the turntable along the radial direction; and multiple clamping components are evenly spaced along the circumferential direction of the turntable; the drive
assembly simultaneously drives multiple clamping components to slide; the clamping mechanism has two opposing bases, and the two bases are slidably mounted on the guide rail; the sliding bases accommodate expansion joints of different lengths; the drive
assembly drives multiple clamping components to clamp and position the inner walls of the
flange and
bellows, thereby accommodating expansion joints of different diameters, and also causing the
flange and
bellows to be coaxially arranged, facilitating subsequent
welding; then the turntable is rotated, and the turntable drives multiple clamping components to rotate, thereby driving the
flange and
bellows to rotate, thus enabling convenient
welding between the flange and bellows through the welding head.