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Calcimator

Springback Calculator

Calculate springback angle and required over-bend compensation from material properties and bend geometry.

Inputs

°
mm
mm
MPa
MPa

Results

Required Over-Bend Angle

90.45°

Springback Angle0.45°
Springback0.5%
Springback Factor0
Compensated Die Radius1.99 mm
RecommendationLow springback — standard tooling should work
How to Use This Calculator
  1. Enter the desired final bend angle (degrees).
  2. Set material thickness and inside bend radius.
  3. Enter yield strength (MPa) and elastic modulus (GPa) from the material data sheet.
  4. Review the springback angle (degrees) and the overbend angle to use in the press brake program.
  5. Test a sample part and measure actual springback -- adjust the overbend angle iteratively for tight tolerances.

How the result changes with Desired Bend Angle

Desired Bend AngleRequired Over-Bend Angle
1919.1°
6464.32°
117117.59°
162162.81°

What each input means

Desired Bend Angle
Target bend angle after springback.
Material Thickness
Sheet metal thickness.
Inside Bend Radius
Inside radius of the bend.
Yield Strength
Material yield strength (mild steel: 250, stainless: 450, aluminum: 150).
Elastic Modulus
Young's modulus (steel: 200,000, aluminum: 69,000, copper: 117,000).

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Desired Bend Angle = 90, Material Thickness = 1.5, Inside Bend Radius = 2, Yield Strength = 250 = 5 input(s) provided
  2. Calculate Required Over-Bend Angle
    Required Over-Bend Angle
    90.45 = 90.45
  3. Calculate Springback Angle
    Springback Angle
    0.45 = 0.45
  4. Calculate Springback
    Springback
    0.5 = 0.5%

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