Getting flexible in tube end forming


Technology . New tool technology behind our rolling machine

The principle of the versatility and flexibility has been linked with the goal of foreseeing the challenging and dynamic market requirements. Sounds good. But when it comes to rolling technology, the different benefits are rather obvious. A relatively short clamping length, good surface quality and the introduction of sharp end forming geometries, e. g. for seal elements make a convincing argument:

And yet that was not enough for our developers at transfluid®. They wanted our rolling technology to enable production of the widest variety of geometries with minimal tooling. The machine itself should be flexibly adaptable to different requirements. An idea put into practice. This is how we began to equip the rolling line with a CNC control unit. This also opened up an economically exciting option of working independently of tooling. In practice this means that a end forming geometry will be not formed with contour-rollers, but with universal rollers. A wide variety of shapes can be freely formed and influenced.

Large degree of forming and repeat trimming

Rolling machines have always been capable of trimming pipe ends and simultaneously forming them. Our new goal went beyond the standard,

because we wanted to simplify the tooling technology, more specifically the clamping jaw, and make it possible to achieve largest possible degree of controlled forming. The development also focussed on cutting back in the trimming in order to achieve greater cut lengths.

With the newly implemented CNC control unit, we have succeeded in feeding material in the shaping area and minimising wall thickness weakening to the extreme with our rolling technology. Of course, the pipe sections are discharged after control. The line is also flexible in the cutting – because we can cut from inside to outside or from outside to inside depending on where the functional surface is intended.

collaring, produced with transfluid® rolling technology

Simple collaring

An additional highlight is that the same roll forming machine can also provide controlled collaring. This means: lower tooling expenses with simultaneously highly stressable simple tooling. No specific clamping tools are used for straight tubes in this process, either; this is only necessary for collaring directly in the bend.

In addition, this type SRM rolling machine enables additional operations, such as the rolling of threads with universal tools.Thread can also be rolled with universal tools.

Proven combination

With everything that these machines are capable of, one thing is especially important: the contour can be adjusted. Therefore, if material-based modifications are necessary, the values are simply adapted in the control unit.

Of course, a transfluid® tube forming machine is also capable of simply rolling. If an appropriate pre-form is required for this purpose, a so-called combination machine can be used. With this line, axial or radial pre-forming can take place and then the exact rolling of the final contour can take place. Of course this all takes place in a single clamping.

Our machine technology is available for the widest range of pipe diameters – up to 30 mm, up to 60 mm, up to 130 mm and even larger. In this manner, we have developed a flexible solution with reduced follow-up costs for the constantly changing challenges of the market.