General description The semi-automatic C/Z purlin machine uses one equipment to be possible to produce the C/Z purlin through the manual simple step less regulation different kinds of size, when the size change does not need to replace the forming roller. The production process selects the automatic control method, may according to parameters input purlin length, longitudinal pitch of holes, quantity and so on to carry on the automatic punch holes, the cutting and roll forming. The C/Z purlin machine consists with the guider, leveler, 2 hydraulic hole punch device, the hydraulic cutting device, fast roller exchange forming machine, the electric controlled system and hydraulic system etc. The main drive of the whole line uses a reducer with the frequency conversion to control, the speed control, length setting and the localization control are accurate and reliable. The complete machine contour artistic, production efficiency high, ( the forming speed can reach 20m/min) Main parameter: 1, C/Z purlin size specification: 2, Thickness of material: 1.5—3mm 3, Distance of punching hole: 45~500mm 4, Length: >1.5m 5, Max. forming speed: 20m/min