The invention relates to a double-
station welding robot which comprises a
robot unit and a workpiece fixing unit and is used for
welding a pipeline and
flange plates at the two ends. Two
welding devices are arranged on a connecting plate of the
robot unit at intervals, a fixed rack and a movable rack of the workpiece fixing unit are each provided with a claw
disc assembly, a double-
station clamping structure is formed, two sets of workpieces can be synchronously clamped and welded, waiting for completion of a single set is not needed, and the
idle time and the production period of equipment are greatly shortened. The movable rack can slide along the linear sliding table seat to adapt to pipelines with different lengths, so that the operation continuity is guaranteed; the clamping
assembly is of a double-positioning structure of an inner
diameter supporting block and an outer
diameter pressing block, three sets of
grippers are evenly distributed along the circumference of a claw disc, the driving device can drive the supporting block to externally support the inner wall of a pipeline and drive the pressing block to internally press the outer wall of a
flange disc, a workpiece is synchronously positioned and fixed,
radial displacement and circumferential rotation are effectively limited, and coaxiality and
assembly precision are guaranteed.
Welding defects caused by loose clamping are avoided, the quality and the qualified rate of joints are improved, and it is ensured that workpieces meet the sealing and strength requirements.