Abstract: A super large diameter longitudinal welded pipe forming machine set comprises an edge hollow-bending device (1), a cage roll forming machine (2) and a plate-frame type forming machine (3), wherein the edge hollow-bending device (1) includes a machine seat (1.1), a pinch centring device (1.2) and a plurality of edge bending mechanisms (1.3); the cage roll forming machine (2) is an open cage roll forming machine combined by an outer roll device (2.1) and an inner roll (2.4); each equal rigid frame of the plate-frame type forming machine (3) includes a machine frame body (3.2), an upper horizontal roll mechanism (3.4), an upper horizontal roll adjusting mechanism (3.5), a sliding seat (3.10), a supporting plate (3.11), a hydraulic cylinder (3.12), a lower horizontal roll mechanism (3.6), a lower horizontal roll adjusting mechanism (3.7), a side vertical roll mechanism (3.8) and a side vertical roll adjusting mechanism (3.9).

Abstract: A production line of large diameter longitudinal welded pipe comprises a material storage table (1), a charging trolley (2), an uncoiler (3), a leveler (4), a shearing and butt welding machine (5), a movable sleeve (6), an edge milling machine (7), a steel plate flaw detector (8), a lifting table (9), a steel pipe forming machine (10), a welding device (11), a pulling device (12), a heat treatment device (13), a cooling device (14), a rigid rolling machine (15), a cut-to-length cutting machine (16) and a discharging rack (17). The production line in the present invention has the advantages including high production efficiency, stable product quality, low manufacturing cost, as well as reliable and convenient operation.

Abstract: A super large diameter longitudinal welded pipe forming machine set comprises an edge hollow-bending device (1), a cage roll forming machine (2) and a plate-frame type forming machine (3), wherein the edge hollow-bending device (1) includes a machine seat (1.1), a pinch centring device (1.2) and a plurality of edge bending mechanisms (1.3); the cage roll forming machine (2) is an open cage roll forming machine combined by an outer roll device (2.1) and an inner roll (2.4); each equal rigid frame of the plate-frame type forming machine (3) includes a machine frame body (3.2), an upper horizontal roll mechanism (3.4), an upper horizontal roll adjusting mechanism (3.5), a sliding seat (3.10), a supporting plate (3.11), a hydraulic cylinder (3.12), a lower horizontal roll mechanism (3.6), a lower horizontal roll adjusting mechanism (3.7), a side vertical roll mechanism (3.8) and a side vertical roll adjusting mechanism (3.9).

Abstract: A production line of large diameter longitudinal welded pipe comprises a material storage table (1), a charging trolley (2), an uncoiler (3), a leveler (4), a shearing and butt welding machine (5), a movable sleeve (6), an edge milling machine (7), a steel plate flaw detector (8), a lifting table (9), a steel pipe forming machine (10), a welding device (11), a pulling device (12), a heat treatment device (13), a cooling device (14), a rigid rolling machine (15), a cut-to-length cutting machine (16) and a discharging rack (17). The production line in the present invention has the advantages including high production efficiency, stable product quality, low manufacturing cost, as well as reliable and convenient operation.