The invention discloses a special-shaped welded
pipe die set cavity structure design and a welded
pipe die, and belongs to the technical field of welded
pipe machining, the special-shaped welded pipe die set cavity structure design comprises a rack,
extrusion forming mechanisms for welded pipes are arranged at the front end and the rear end of the rack, and an edge correction mechanism is arranged at the position, close to the
extrusion forming mechanism at the front end, of the top of the rack; and an opposite side
grinding mechanism is arranged in the middle of the top of the rack. The
extrusion forming mechanism composed of the first n-shaped frame, the upper pressing roller, the lower pressing roller, the n-shaped frame, the side pressing roller and the translation air cylinder is arranged at each of the front end and the rear end of the rack, and after being extruded, a steel plate is extruded at the front end of the rack, and the edges of gaps are preliminarily aligned; the edge correcting mechanism, the opposite edge
grinding mechanism and the cleaning mechanism are used for correcting,
grinding and cleaning the edges of the welded pipes, the extrusion forming mechanism at the rear end of the rack is used for thoroughly aligning
welding seams, and finally the
laser welding machine is used for
welding treatment, so that the orderliness of the welding seams and the welding quality are ensured.