The Principle Of Cold Bending Forming Machines

Cold bending forming machines utilize the plastic deformation characteristics of metal materials, using multiple sets of sequentially arranged forming rollers to progressively bend metal strips (typically 10-20 sets of rollers). The processing is divided into three stages: pre-forming, intermediate forming, and precision forming. Each stage includes multiple rolling processes (deformation gradually decreases to 0.5-1mm/pass), ensuring uniform material deformation and controlling residual stress below 200MPa. The core systems of the equipment include: an uncoiling system (tension control accuracy ±5N), a leveling device (flatness ≤0.5mm/m), a forming unit (roller hardness HRC58-62), a cutting system (length error ±0.3mm), and a receiving device (stacking accuracy ±2mm). It is suitable for mass production scenarios such as building steel structures (C/Z type purlins) and automotive parts (door rails).