MANUFACTURING – HEET METAL & FORMING CALCULATOR
Bend Deduction
A precise tool.
What is the Bend Deduction & How does it work?
Bend deduction accounts for the material that is effectively removed when a sheet metal part is bent, allowing designers to predict the final flat length of a part. The calculation combines the bend angle, material thickness, inner radius, and the K‑factor, which represents the location of the neutral axis within the bend. Accurate deduction values are essential for cost‑effective tooling and to avoid costly re‑work in production.
D = Aleft(K,t + Rright)
D = bend deduction, A = bend angle (radians), K = K‑factor, t = material thickness, R = inner bend radius
Parameters
Result
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Frequently Asked Questions
What is bend deduction in manufacturing?
Bend deduction is the amount of material removed when bending a sheet metal part, used to determine the final flat length.
How do I calculate bend deduction?
Use the formula D = A(Kt + R), where D is bend deduction, A is bend angle in radians, K is the K-factor, t is material thickness, and R is inner radius.
Why is accurate bend deduction important?
Accurate bend deduction ensures cost-effective tooling and prevents costly rework in production by predicting the final flat length of a part.
What does K-factor represent in bend deduction?
The K-factor represents the location of the neutral axis within the bend, crucial for calculating accurate bend deduction.
How does material thickness affect bend deduction?
Material thickness (t) directly affects bend deduction; thicker materials require more material to be removed during bending.
Can I use degrees instead of radians for the bend angle in this formula?
No, the formula requires the bend angle to be in radians. You must convert degrees to radians before using the formula.
What is the impact of changing the inner radius on bend deduction?
Increasing the inner radius (R) increases the bend deduction, as more material is removed from the bend area.
Results are for informational purposes only and do not constitute professional advice.