Solution for Circumferential Seam Joint Butting of Storage Tank Cylinder

The joint butting of fuel storage tank cylinder section of carrier rocket is mainly based on friction stir welding process, and large gantry structure is used to cooperate with corresponding tooling to complete the welding action. The equipment is customized according to the size of welding object with maximum cylinder section diameter up to 10m and cylinder wall thickness up to 25mm. The system adopts CNC control and supports "constant pressure-constant position" control mode which can accurately control welding seam quality. According to different requirements, the equipment can choose mechanical spindle and motorized spindle drive. Pumpback spindle can be selected to weld circular seam and eliminate welding tail holes. In order to improve the accuracy of welding formation, milling handpiece can be used for edge milling on the welding seam edges of workpiece. Customized internal support and external pressure tooling is available according to product characteristics.