C and z purlin roll forming machine with dual-mode

The purlin roll-forming machine's forming process is achieved through multiple, continuous cold-bending steps. This process is fully automated and precision-controlled. The specific steps are as follows:

First, coiled metal sheets (such as galvanized or cold-rolled steel) are released from a feeder rack. A guide device corrects their position, ensuring a straight feed into the forming unit, eliminating any initial bends or offsets.

The sheet then enters the core roll-forming area, where it is gradually shaped by 15-25 sets of rollers arranged in a specific sequence. Each set of rollers corresponds to a preset bend angle and arc. Starting from the edge of the sheet, the rollers progressively roll the cross-section—first folding the edge, then bending the arc, and finally shaping the sheet—gradually forming the flat sheet into the target C- or Z-shaped cross-section. The entire process takes place at room temperature, without altering the steel's mechanical properties.

The formed continuous profile enters the cut-to-length section, where a hydraulic flying saw rapidly cuts it to the set length. The cutting speed is synchronized with the conveyor speed to ensure a smooth cut and a length tolerance within ±1mm.

Finally, the cut purlins are transported via a conveyor rack to a collection area where they are automatically stacked into stacks, completing the entire forming process. A PLC system coordinates the speed and parameters of each link throughout the process, achieving continuous, high-precision forming from raw material to finished product.