Before Bending

Date: 4 September 2026

Prepare tooling, edge condition and bend line so that springback and the risk of brittle fracture remain under control.

• Grade and batch are known, and the direction-dependent minimum values for punch radius and die width are determined.
  Grade and batch are known, and the direction-dependent minimum values for punch radius and die width are determined.
• The bend line is placed transverse to the rolling direction wherever the cutting layout allows.
  The bend line is placed transverse to the rolling direction wherever the cutting layout allows.
• Edges are deburred and rounded, cut edges have been machined back, and grinding marks run transverse to the bend line.
  Edges are deburred and rounded, cut edges have been machined back, and grinding marks run transverse to the bend line.
• The manufacturer's stamping does not lie on the bend line.
  The manufacturer's stamping does not lie on the bend line.
• The tooling has been checked: die edges at least as hard as the plate, lubricated round bars, matching opening angle.
  The tooling has been checked: die edges at least as hard as the plate, lubricated round bars, matching opening angle.
• Springback has been allowed for; a trial bend is planned for a new batch.
  Springback has been allowed for; a trial bend is planned for a new batch.
• Personnel stand to the side of the machine, and the guard is active.
  Personnel stand to the side of the machine, and the guard is active.