Cambering

CamberingCambering is an plastic deformation which induces an obtuse angle in the middle of a beam to counteract a deflection due to a load. Voortman developed two cambering machines for beam straightening and cambering.

Cambering process

When a beam is cambered the first stage will be an elastic deformation. This elastic deformation is reversible. When the force is no longer applied, the beam will return to its original shape. The elastic range ends when the material reaches it yield strength and that´s when the plastic deformation starts. Plastic deformation is irreversible but because the first deformation was elastic it will always part way return to its original shape. With the Voortman cambering machines it will automatically measure the actual deformation after relieving the load. When the actual deformation is lower than the desired deformation it will automatically initiate another cycle. It will repeat this process until the desired deformation is obtained.

Required press power and supporting distance

Formule: P = Wy x σ x 4 / A

Profile Moment of resistance
(Wy)
Supporting distance
(A)
Required press power
(S235 σ = 420 N/mm²)
  cm³ inch³  mm ft  tonnes tons
HEB 800 8980 548 8000 26-1/4 189 210
UB 914x305x253 9501 580 8000 26-1/4  200 220
W36x12x160 8883 542 8000 26-1/4 187 205

Profile Moment of resistance
(Wy)
Supporting distance
(A)
Required press power
(S355 σ = 550 N/mm²)
  cm³ inch³ mm ft tonnes tons
HEM 1000 14330 874 8000 26-1/4 394 435
UB 914x419x343 13730 838 8000 26-1/4 378 415
W40x12x235 14350 876 8000 26-1/4 395 435

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