Springback compensation is one of the greatest challenges in the automotive industry, in which state-of-the art materials, such as ultra high strength steels and aluminum, are increasingly being used. Parts stamped from these materials are more prone to springback than parts made out of conventional steel. As springback modifies the final shape of the part, springback compensation is carried out thereby increasing manufacturing costs.
To address these challenges, stamping simulation is applied in modern engineering. In the past, the main focus when analyzing splits and wrinkles was on the drawing stage. In recent years, however, higher quality requirements, most importantly geometrical accuracy, need to be verified. In particular, the verification of springback and its countermeasure, springback compensation, are carried out regularly in car body engineering. Experience has shown, however, that springback compensation is not an easy task.
Springback compensation, a countermeasure of springback, is carried out during the tool development phase to improve the stamped part and tool quality before the real tryout phase begins. Compensation of the die faces is implemented in the opposite direction of springback, while applying the same value. The computation of the compensation value can be carried out with the most modern algorithms in just a few minutes, and the compensated tool geometry can automatically be used as input for the next simulation. With very few optimization loops, a final stamping can be achieved within the required tolerances. Springback compensation allows engineers to substantially reduce time and cost in engineering and tryout.
Further information on springback compensation at AutoForm: