1. Setting the process in motion:

The ring-shaped preform (pressed, turned, drawn or forged) is pushed tight over the main spindle and clamped with a pressure plate. The spindle and workpiece start to rotate.

2. Reducing wall thickness and lengthening:

The flowforming rollers are now applied under pressure to the circumference of the preform. The combination of pressure and friction causes axial flow of the material. The axial motion of the flowforming rollers reduces the wall thickness of the blank (S0) to a definable final wall thickness (S1) — thus also increasing the initial length of the blank (L0) to the final length (L1).

We go to great lengths: We use reverse flowforming for cylindrical components open at both ends. This allows us to produce tubes with a length of up to 6 meters.

1. Setting the process in motion:

The tube is pushed tight over the mandrel and against a serrated drive ring. The axial force of the rollers presses the tube onto the serrated drive ring which rotates with the mandrel, causing the cylinder tube to rotate.

2. Elongation:

The flowforming rollers are now applied to the circumference of the preform. They exert radial pressure causing the tube to ‘flow’ towards the free end of the flowforming mandrel. The workpiece length is elongated from the initial length (L0) to the final length (L1).