Bending Force Results
Required Bending Force:
0
Recommended Machine Tonnage:
0
Bend Allowance Factor (K):
0.33
Frequently Asked Questions
What is bend force in metalworking?
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Bend force refers to the amount of pressure required to deform a metal sheet to a specific angle without causing cracks or defects. It depends on material properties, thickness, bend length, and the bending method used.
How does die opening width affect bending force?
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The die opening (V-width) is inversely proportional to the bending force. A wider die opening requires less force but may result in less precise bends. Typically, the V-width is 6-12 times the material thickness.
What’s the difference between air bending and bottoming?
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Air bending uses less force as the material doesn’t fully contact the die, while bottoming requires more force as the material is pressed completely into the die. Bottoming provides more accuracy but needs 2-3 times more force than air bending.
How do I determine the tensile strength of my material?
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Tensile strength values are typically provided by material suppliers. Common values: Mild steel (400-500 N/mm²), Stainless steel (500-700 N/mm²), Aluminum (100-300 N/mm²). When in doubt, consult material specifications or perform tensile tests.
Why add a safety factor to the calculated bending force?
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A safety factor (typically 20-30%) accounts for material variations, tool wear, and other process variables. It ensures the press brake has sufficient capacity for consistent performance without overloading.