1. What is Bending Force Calculation?

Definition: This calculator estimates the force required to bend sheet metal using a press brake or similar equipment.

Purpose: It helps metal fabricators determine the appropriate machine capacity needed for specific bending operations.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( F \) — Bending force (Newtons)
• \( k \) — Die factor (typically 1.33 for V-dies)
• \( \sigma \) — Material tensile strength (Pascals)
• \( b \) — Bend length (meters)
• \( t \) — Material thickness (meters)
• \( L \) — Die opening (meters)

Explanation: The force increases with material strength, bend length, and the square of thickness, but decreases with larger die openings.

3. Importance of Bending Force Calculation

Details: Accurate force calculation ensures proper machine selection, prevents equipment overload, and helps achieve consistent bend quality.

4. Using the Calculator

Tips: Enter the die factor (default 1.33), material tensile strength, bend length, material thickness, and die opening. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical die factor (k) value?
A: For air bending with V-dies, k is typically 1.33. For bottoming or coining, it may range from 2-5.

Q2: How do I find material tensile strength?
A: Check material specifications or reference tables for common metals (e.g., mild steel ~400 MPa, aluminum ~200 MPa).

Q3: What units should I use?
A: Use consistent SI units: meters for length dimensions and Pascals for strength.

Q4: Does this account for springback?
A: No, this calculates only the required bending force. Springback compensation requires additional considerations.

Q5: How does die opening affect the force?
A: Larger die openings (L) reduce required force but may affect bend angle precision.