... , door frame, rack, stud & track, c/z/u purlin, etc Light Steel Keel Roll Forming Machine The machine is used to ... directly into cold-forming steel frame as required, such as light-gauge steel, door and window frame, cable bridge, electric cabinet ... . It can form galvanized steel, stainless steel, aluminum sheet, etc.Components It mainly includes uncoiler, main forming machine, hydraulic punching and ...