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Home » About Us » Products, Processes and Services » Application of Machines » Swaging Machines or Tube End Forming Machine » Articles & Resources

Swaging Machines or Tube End Forming Machine - Articles & Resources

Selecting a tube end forming method
Your company has the opportunity to provide a tube assembly, but it requires end forming—a capability you do not have. An Internet search for "tube end forming" leads to a range of options. How do you sort through them?

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Focusing on the function of the tubes to be reshaped, and not on the forming method, can lead you to select an end forming method that optimizes the part cost, particularly if the opportunity involves a new part. The ways to form the tube end boil down to a few basic methods, so understanding their capabilities and limitations is critical to selecting the best process for a particular part. Thinking about creative ways to employ the process can help to improve product performance and reduce process cost.

The basic end forming methods are segmented tool sizing, ram forming, rotary forming, roll forming, and spinning. The latter three have specific advantages in working around the circumference of a tube, especially where sharp angles and radical diameter changes require working the tube more gradually. The first two work the whole circumference at one time. While they provide a quicker forming cycle, they are limited in their range of applications.

This article focuses on applications for which segmented tool sizing and ram forming are the optimal methods, typically high-volume production for basic tube end forms.

Fabricators who need to do end forming frequently ask many of the same questions, whether the project is a part or an assembly of parts. What does the formed tube need to do? Are all of the part's features necessary? Does the current design already assume a specific forming method? Can we make changes to mating parts? Can I achieve the same result with fewer parts?

The tube alloy and production process are important factors regarding the part design and the forming method. Can the material accommodate the necessary amount of deformation? If so, what is the best way to work the material to achieve the end form? Is the tube seamless, or does it have a weld seam? What are the tolerances and the cosmetic requirements according to the print?

Author: Rob Dean


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