Roll forming method for producing sheet metal profiles, includes pre profiling step for preventing tension or deformation during asymmetric profiling

摘要

A pre-profiling step is carried out to prevent tension and/or deformation occurring in one part of the sheet metal material (1-5) during subsequent asymmetric profiling. A roll forming method for producing sheet metal profiles from flat sheet metal material includes a pre-profiling step to prevent tension and/or deformation occurring in one part of the material due to asymmetric profiling when the other part of the material is profiled. This pre-profiling step is carried out in the length direction and afterwards the profile central axis is rotated for each profiling step.