The bending force required for a press brake to bend a sheet metal piece can be calculated using a formula based on the material type, thickness, bend length, and die opening size. Here’s the general formula:
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where:
- F is the bending force (in kN or tons).
- L is the bend length (in mm) – the length of the sheet being bent.
- S is the sheet thickness (in mm) – the thickness of the metal sheet.
- UTS is the ultimate tensile strength (in N/mm²) of the material – a property that varies based on the metal type.
- V is the die opening (in mm) – the width of the V-shaped die opening that supports the sheet during bending.