Preventing Cracking During the Flattening Bending
Successful use of a Hem Die requires careful assessment of the material's ductility and minimum bend radius limits. While the initial acute bend sets the stage, the final, intense flattening bending stroke is where cracking is most likely to occur, especially with materials exhibiting low elongation. Fabricators must ensure the material's properties are compatible with the severity of the hem, preventing costly scrap rate and guaranteeing the structural rigidity of the finished hem.