A purlin roll forming machine works through a series of consecutive steps that transform a metal coil into purlins with specific shapes and sizes. The working process is as follows:
1. Uncoiling
The process starts with an uncoiling device. A large metal coil is placed on the uncoiler. The uncoiler gradually releases the metal strip from the coil, providing a continuous supply of material for the subsequent forming process. The speed and tension of the uncoiling can be adjusted to ensure a stable material flow.
2. Leveling
After uncoiling, the metal strip passes through a leveling device. This device consists of multiple rollers that work together to flatten the metal strip. The leveling process is crucial as it ensures that the metal strip has a flat and even surface, which is essential for achieving accurate and uniform forming in the later stages. It corrects any curvature or unevenness in the metal strip caused during the coiling process or transportation.
3. Guiding and Feeding
The leveled metal strip then enters the guiding and feeding mechanism. This mechanism guides the metal strip precisely into the roll forming unit, ensuring that it is properly aligned with the rolls. The feeding speed can be controlled according to the production requirements, and it is usually synchronized with the rotation speed of the rolls in the roll forming unit to ensure a smooth and continuous forming process.
4. Roll Forming
The roll forming unit is the core part of the purlin roll forming machine. It consists of multiple sets of rolls, which are arranged in a specific sequence. As the metal strip passes through these rolls, each set of rolls applies a specific amount of pressure and deformation to the metal strip. Through a series of consecutive bending and shaping operations, the metal strip is gradually formed into the desired purlin profile. The rolls are designed and manufactured according to the specific purlin shape and size requirements, and they work in coordination to achieve the precise forming of the purlin.
5. Cutting
Once the metal strip has been formed into the purlin shape, it needs to be cut into specific lengths. The cutting device, which is usually located at the end of the production line, performs this task. There are different types of cutting methods, such as mechanical cutting, hydraulic cutting or laser cutting. The cutting operation is triggered based on the preset length, and it cuts the continuously formed purlin into individual pieces of the required length.
6. Output and Stacking
After cutting, the finished purlins are discharged from the machine. They can be collected and stacked manually or by using an automated stacking device. The stacking process is arranged to ensure the stability and neatness of the purlins, facilitating subsequent transportation and storage.
Throughout the entire process, the purlin roll forming machine is usually controlled by a programmable logic controller (PLC) system. The operator can set various parameters on the control panel, such as the speed of each process, the dimensions of the purlins and the cutting length. The PLC system monitors and adjusts the operation of each component in real time to ensure the accuracy and efficiency of the production process.
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