1. What is a Press Brake Tonnage Calculator?

Definition: This calculator estimates the required bending force (tonnage) for press brake operations based on material properties and bending parameters.

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

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — Required tonnage (tons)
• \( L \) — Length of bend (inches)
• \( t \) — Material thickness (inches)
• \( S \) — Tensile strength (psi)
• \( V \) — V-die opening (inches)

Explanation: The formula calculates the force needed to bend metal by considering material properties and bending geometry.

3. Importance of Tonnage Calculation

Details: Proper tonnage estimation ensures successful bending operations, prevents machine overload, and helps select appropriate tooling.

4. Using the Calculator

Tips: Enter the bend length, material thickness, tensile strength (default 60,000 psi for mild steel), and V-die opening. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical tensile strength for mild steel?
A: Mild steel typically has a tensile strength of about 60,000 psi (60 ksi).

Q2: How does V-die opening affect tonnage?
A: Larger V-die openings require less tonnage, while smaller openings require more force.

Q3: What if I'm bending a different material?
A: Adjust the tensile strength value (e.g., 30,000 psi for aluminum, 80,000 psi for stainless steel).

Q4: Does this account for air bending?
A: Yes, this formula is specifically for air bending operations.

Q5: Should I add a safety factor?
A: It's recommended to add 10-20% to the calculated tonnage for safety margin.