The tool makes the form

Technology . Effective variations for axial tube forming

Das Werkzeug macht die Form

‘The machine isn’t that important for forming tubes.’ Are you surprised we of all people would say this? We do admit, naturally the machine is the technological prerequisite for this special topic. It could also be said, it is the solid basis for implementing the process. Yet tool technology is pivotal among the efficient shapers and drivers of tube formation.

JGiven the diversity of demands, the appropriate solutions can be completely different. This may be the transfluid® upsetting technology, with upsetting capacities of 98 kN, 147 kN or 196 kN. This can also be our roller technology, which facilitates tooling-independent forming. Under certain circumstances, even combination machines that can perform axial upsetting and roller forming in a tube clamping device are necessary. In order to secure optimum results, it is crucial that the tools used during the process guarantee the right design of each individual product. This interplay has always been the technological focus at transfluid®, with intensive

tool development for the customer. This includes manufacturing feasibility analyses, master part manufacture where needed, and even prototyping. In this issue, we will explore the exciting tool engineering topic of special tool concepts for axial formation, which can be readily adapted to different demands.

Support geometries from the inside too

For example, where cycle time allows, we usually use an intermediate clamping element to process hose connections. These units enable support for the entire geometry from the inside as well. This technology prevents the tube from buckling inwards at sensitive areas.

Pneumatic clamping without a scratch

If multiple compressions cannot be manufactured with the above process, we produce the part in a single work station with ‘jaw slide tools’. A special feature of these tools is the controlled internal pneumatic clamp locks they are fitted with. This protects the geometry from scratches when the clamping jaws open after forming. It also allows the position of the sliding elements to be recognised at any time.

No cold welding between tool and material

One additional technical feature is forming heads which open when the forming station moves backwards and forwards. They prevent contact between the material and the tool during longer strokes. Cold welding between tool and material is eliminated, and the surface of the material remains completely undamaged. With this technology, multiple beads can also be manufactured with use of an intermediate clamp.

Do you find this topic interesting?
Then you won’t want to miss our next t time(s) either. The tool technology of our rolling machines will be the central topic; for example, rolling threads with a universal tool will be covered. We will also explain dimpling for outlets, flexible tools for surface treatment of rotationally symmetrical sealing heads and CNC-rolling with one tool for many contours.
The excitement continues.