Issues with tube bending? Bend die with integrated wiper die by Numalliance

Specializing in the production of bending machines for over half a century, the Numalliance group already owns numerous patents related to tube bending and deformation and continues to push the boundaries of innovation. Among its latest breakthroughs is a revolutionary tool set to transform the world of tube bending.

Although there are several types of bending, Numalliance machines primarily use rotary draw bending. How does this type of system work? And what are the key components that make it up?

- The bend die is the part around which the tube is bent. 
- The pressure die has a long cylindrical groove that holds the tube in place and provides horizontal support during bending operations. 
- The clamp die is mounted on the clamping arm and moves toward the bend die to tighten and secure the tube in the bend die groove and prevent any slipping during the bending operation. 
- The wiper die (which is optional) prevents wrinkles on the inside by holding the tube and guiding it throughout the bending process. 
- The mandrel (also optional) is placed inside the tube near the deformation area. It improves the bend quality by holding the outer part of the tube to prevent flattening and ovalization.

The wiper die covers a key role in the bending process, as the final quality of the piece depends on this tool. It helps distribute the material evenly during the bending operation and avoids turbulence. It is a wear part that needs to be replaced regularly. Proper adjustment of this part is important to achieve a perfect bend and ensure a longer lifespan for the wiper die.

All these factors led Numalliance to develop a bend die with an integrated wiper die.

This new tool eliminates the need for wiper die adjustments, thus improving tool change time and the quality of the produced parts. The rigid design significantly reduces its wear and saves material and energy by reducing setup and tuning times. This tool is designed to be integrated into fully automated cells and can be easily changed by a robot, meeting the needs of Industry 4.0.

This innovation has been patented worldwide and has earned Numalliance a Global Industrie Award.

For more information about Numalliance's range of bending machines and equipment, we invite you to visit the dedicated page and contact the sales team using the provided references.