Synchronous rotating device of ring welder for nuclear rod end plug

The invention belongs to the technical field of nuclear fuel element manufacture and particularly relates to a synchronous rotating device of a ring welder for a nuclear rod end plug. The synchronousrotating device is characterized in that a motor drives an internal synchronous pulley and an external synchronous pulley to rotate simultaneously through a lengthening shaft, a speed reducer and a coupling, the internal synchronous pulley is matched and connected with a welding chuck, the internal synchronous pulley can drive the welding chuck to rotate during rotating, the external synchronous pulley is connected with a matched wheel jack through a key groove, and therefore, the external synchronous pulley can drive the matched wheel jack to rotate during rotating. According to the synchronous rotating device, synchronous rotation of the chuck and a plug is realized, the problems of rubbing and copper staining on the surface of the nuclear rod end plug are effectively solved, and qualityof nuclear rod is improve