Coil-to-coil tube unwinding-rewinding system

Across industries involved in the processing of small-diameter tubes, particularly stainless steel tubing, manufacturers require specialized equipment capable of meeting increasingly demanding quality standards.

To achieve this goal, key inspection and treatment stages are now being integrated directly into production lines. These include furnace annealing to restore the material’s mechanical properties and non-destructive ultrasonic testing to verify weld integrity.

To ensure seamless continuity throughout the production process, Violi Macchine Srl has developed the new VM/I-ASB, a fully automatic coil-to-coil tube unwinding and rewinding system designed for integration into production lines. Besides significantly reducing operating costs and minimizing the risk of material damage, the system provides a modular platform that can accommodate heat treatment and quality control processes while maintaining continuous, accurate tube handling.

How does the VM/I-ASB coil-to-coil system work?

The process begins with the coil mounted on a mobile support that can be adjusted to accommodate different coil sizes while allowing both rotation and translation.

The tube is then smoothly guided through a series of adjustable rollers, with height and angle settings that ensure proper alignment before entering the traction unit. This unit has been specifically designed to move stainless steel tubing without damaging its surface. The tube then passes through the straightening section, where any residual curvature is removed.

Throughout the entire process, the tube travels at a constant, precisely controlled speed, ensuring ideal conditions for the intermediate processing stage. Once this phase has been completed, the system performs the same operations in reverse sequence, rewinding the finished tube onto a new coil.

The entire system is managed by an electromechanical PLC-based control system that coordinates every operating function. A sensor network continuously monitors tube speed, tension, and straightness, ensuring stable process conditions throughout the production cycle. Thanks to its modular design, the VM/I-ASB can be easily configured to meet different production requirements and integrated with a wide range of processing technologies.

For more information, please contact us at: marketing@violimacchine.it