Device for shaping of helical fins on the outer wall of a tube

摘要

A device for the formation by rolling of helical fins on heat exchange tubes to increase the heat transfer capacity of the tubes. The device comprises four forming rolls (6, 7, 8, 9) which are arranged on two carriages (4, 5) which are moved together in translation fashion by a hydraulic jack which enables the four forming rolls to bear simultaneously on the wall of a tube (2). The four forming rolls operate around the tube and are rotatably driven at equal speed by a single motor (50). The forming rolls are oriented about an axis (X2, X4, X5) which is perpendicular to the fin shaping zone. The tube (2) is driven by the forming rolls along an axis of translation.