Patent ID: 8701289

Claim:
A process for producing a turbulence device ( 1 ) which is to be mounted in at least one flow duct of a heat exchanger of a motor vehicle, comprising the following process steps: in a first process step, at least one shaping operation is used to produce at least one substantially meandering turbulence device ( 30 ) with substantially smooth walls ( 2 ) from a substantially continuously planar sheared strip ( 9 ), wherein a longitudinal direction (RLR) of the walls runs substantially parallel to a forward feed direction (VSR) of the sheared strip ( 9 ), in a second process step, wall sections are deformed at least by an angle (α) in relation to the forward feed direction (VSR), in such a way that undercuts ( 3 ) are produced in relation to the forward feed direction (VSR, RLR), wherein the substantially continuously planar sheared strip ( 9 ) is cut into turbulence devices ( 1 ) of predetermined lengths before carrying out the second process step.