Required Capacity for Effective Flattening Bending
When calculating the necessary bending tonnage for the Hemming Tool, fabricators must account for the force required to plastically deform and compress two layers of sheet metal thickness simultaneously. This high force demand for flattening bending means that Hem Dies are often limited to shorter bend lengths or require a high-capacity press brake. Accurate tonnage calculation is vital for the safety of the machine and for achieving a high-quality, fully closed hem.