This Spring Back Calculator helps you estimate the final bend angle and inner radius after elastic recovery during sheet metal bending. Enter key parameters to improve bending accuracy and reduce trial-and-error.
- Final Bend Angle
Final Bend Angle = 180 − Bend Angle
- Spring Back Factor
Spring Back Factor = Final Bend Angle ÷ Bend Angle
- Spring Back (Angle)
Spring Back = Final Bend Angle − Bend Angle
- Final Inner Radius
Final Inner Radius = Inner Radius + 0.00125 × K-Factor × Sheet Thickness × Bend Angle
- Material: Select the sheet material (e.g., steel, aluminum).
- Sheet Thickness (t): Thickness of the metal sheet in mm.
- Inner Radius (R₀): Initial design bend radius in mm.
- Bend Angle (A₀): Intended bend angle in degrees (0–180°).
- K-Factor: Ratio that defines neutral axis location (typically 0.3–0.5).
