AIEngineeringTool

Press Brake Bending Tonnage Calculator

Estimate bending force and preliminary press capacity from sheet condition, V-die opening, bend length and forming method.

ENGINEERING PRINCIPLE

Press-brake force for a selected bend

This air-bending estimate rises with tensile strength, bend length and the square of material thickness. It reduces as V-die opening increases.

FORMULA & SYMBOLS

F = 1.42 × Rm × t² × L / (V × 1000) [metric air-bending estimate]

  • F = bending force (kN)
  • Rm = tensile strength (MPa)
  • t = thickness (mm)
  • L = bend length (mm)
  • V = V-die opening (mm)

LIVE PRESS-BRAKE INPUTS

Tooling and material condition

Use one selected bend. The Flat Pattern Calculator provides a whole-part per-bend view.

MATERIAL
TOOLING & METHOD

Enter approved K-factor and tensile-strength data for the supplied sheet condition. Force is a preliminary estimate; actual tooling, friction, grain direction, press condition and profile must be checked.

LIVE PUNCH, SHEET & V-DIE VIEW

Live view paused

Enter valid positive dimensions to render the engineering drawing.