The utility model discloses
assembly welding equipment for a
flange connecting
pipe of a
pressure vessel, which belongs to the technical field of
pressure vessel manufacturing equipment and comprises a first workpiece clamping component fixedly arranged on a lathe
bed and a second workpiece clamping component arranged on the lathe
bed through a moving component, and the second workpiece clamping component can be close to or far away from the first workpiece clamping component. The first workpiece clamping
assembly and the second workpiece clamping
assembly each comprise a chuck fixing base, and a rotating chuck is installed on one side of each chuck fixing base. Three clamping jaws are arranged on the rotary chuck; the clamping jaws can move in the radial direction of the rotary chuck. The clamping jaw is driven by a first
pneumatic motor; the rotary chucks are driven by a second
pneumatic motor to rotate, and the center lines of the two rotary chucks are coaxial; the device further comprises a
welding mechanism and a ground wire contact block. The
welding mechanism is arranged corresponding to a welded junction of the
flange and the connecting
pipe. The ground wire contact block is arranged on a chuck fixing seat of the first workpiece clamping assembly; according to the utility model, the assembly precision can be improved, the clamping time can be shortened, and the
processing efficiency can be improved.