1. Stamping material properties: There are automotive stampings with different strengths on the car body, from ordinary plates to high-strength plates. Different plates have different yield strengths. The higher the yield strength of the plates, the easier it is to spring back. For example, S500MC and DP780 are high-strength steel plates with good cold forming properties.

2. Stamping material thickness: In the metal stamping process, the thickness of the sheet has a great influence on the bending performance. As the thickness of the sheet increases, the springback phenomenon will gradually decrease. This is because as the sheet As the thickness increases, the materials involved in plastic deformation increase, and the elastic recovery deformation also increases, so the springback becomes smaller.

3. Shape of stamping parts: The springback of parts with different shapes is very different, and parts with complex shapes are generally increased in order to prevent springback when forming is not in place, and some parts with special shapes are more prone to springback. Springback phenomena, such as U-shaped parts, must be considered for springback compensation during the analysis and forming process. At present, European and American customers generally require that the springback compensation should be handled in the process design stage of the stamping die, and the springback should be within the product tolerance range.

4. Blank holder force of automobile die blank holder: Blank holder force stamping is an important technological measure. By continuously optimizing blank holder force, the flow direction of the material can be adjusted and the internal stress distribution of the material can be improved. The increase of blank holder force can make the part drawing more fully, especially the part side wall and the R angle position. If the forming is sufficient, the internal and external stress difference will be reduced, so that the springback will be reduced.

5. Drawbeads for automobile molds: Drawbeads are widely used in today's processes. A reasonable setting of the drawing position can effectively change the direction of material flow and effectively distribute the feed resistance on the pressing surface. Improve the formability of the material, and set drawbeads on the parts that are prone to springback, which will make the parts more fully formed, the stress distribution is more uniform, and the springback will be reduced.

Combining the above factors, in order to save the time of auto mold adjustment and reduce the cost of subsequent mold modification, before the stamping process of auto mold is determined, it is generally necessary to use CAE simulation software for springback analysis, and for springback compensation and continuous correction. Its software includes Autoform, Dynaform and JStamp, etc.