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Power Press Tonnage Formula:
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Power press tonnage calculation determines the force required to punch or blank materials in metalworking operations. Accurate tonnage calculation ensures proper press selection and prevents equipment damage.
The calculator uses the standard tonnage formula:
Where:
Explanation: This formula calculates the total force needed to shear the material by multiplying the length of cut by material thickness and its shear strength.
Details: Proper tonnage calculation is essential for selecting the right press equipment, preventing overloading, ensuring quality parts production, and maintaining tooling longevity.
Tips: Enter circumference in inches, thickness in inches, and shear strength in tons per square inch. All values must be positive numbers for accurate calculation.
Q1: Why is tonnage calculation important in press operations?
A: Proper tonnage calculation ensures you select a press with adequate capacity, preventing equipment damage and ensuring successful part production.
Q2: How do I determine material shear strength?
A: Shear strength values are typically provided in material specifications. Common values range from 25-50 tons/sq in for most metals.
Q3: What safety factor should I add to the calculated tonnage?
A: Typically, a 20-30% safety factor is added to account for material variations, tool wear, and other variables.
Q4: Can this formula be used for all materials?
A: While the formula works for most metals, some materials may require adjustments based on their specific cutting characteristics.
Q5: How does material thickness affect required tonnage?
A: Tonnage increases linearly with material thickness - doubling the thickness doubles the required tonnage.