ENGINEERING CALCULATORS
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Engineering calculators (Beta)
Calculate one-bend flat length from straight tangent legs or outside virtual-apex dimensions.
Click the grid to add ordered vertices. Edit coordinates in mm; separate holes with a blank line. The last vertex closes to the first automatically.
Choose units and enter numbers. Full-width digits and fractions such as 1/8 or 1 3/8 are accepted. Changing a unit converts the entered value.
Reference calculation only. Results do not certify suitability for an actual design or its safety.
Inputs: select a blue symbol to edit Results: red-orange values and lines
3D shows an illustrative extrusion. Its display length does not enter the section calculations. Edit dimensions in 2D.
BA=θ(R+Kt); SB=(R+t)tan(θ/2); BD=2SB−BA. Tangent legs: Lflat=A+B+BA. Outside legs: Lflat=A+B−BD. θ in radians.
Displayed values are rounded. Diagrams illustrate the calculation conditions. Initial material and fluid properties are examples; replace them with values for the actual material, temperature and conditions.
ReferenceEquations assume particular loads, supports and deformation ranges. Check inputs, units and the applicability of each equation. Diagrams explain conditions; they are not manufacturing drawings or proof of safety.
Material values are typical values or reference ranges, not certified product properties or ready-to-use design allowables. They vary with standards, product form, dimensions, temper and temperature. Check the specifications and inspection certificates for the actual product.
Displayed safety factors and checks apply only to the supplied inputs and calculation model. They do not automatically establish the safety of a complete design, including code compliance, service life, fatigue or joints. For actual design, manufacture and use, separately verify applicable regulations and standards, product specifications, and the necessary tests and engineering review.
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1か所の曲げについて、直線部分または外側仮想交点までの寸法から展開長を計算します。
BA=θ(R+Kt); SB=(R+t)tan(θ/2); BD=2SB−BA. Tangent legs: Lflat=A+B+BA. Outside legs: Lflat=A+B−BD. θ in radians.
1曲げ・一定板厚・一定内側半径の幾何モデルです。角度は平板0°からの曲げ量で、図の内角は180°−θです。Kは内面から中立面までの距離/板厚で、材料・板厚・金型・加工法に合わせた試し曲げから確認します。0.4は例です。外側寸法モードではA・Bが仮想交点までの寸法であり、接点までの長さと混在させません。加工可能な最小R、割れ、スプリングバック、金型干渉、曲げ力は判定しません。
Calculate one-bend flat length from straight tangent legs or outside virtual-apex dimensions.
BA=θ(R+Kt); SB=(R+t)tan(θ/2); BD=2SB−BA. Tangent legs: Lflat=A+B+BA. Outside legs: Lflat=A+B−BD. θ in radians.
Geometric one-bend model with uniform thickness and inside radius. Bend angle is measured from flat (0°); included angle is 180°−θ. K is neutral-axis distance from the inside divided by thickness and must be established for the actual material/tool/process, preferably by bend trials. 0.4 is an example. Outside-mode A/B reach the outside virtual apex; do not mix conventions. Minimum forming radius, fracture, springback, tooling collision and forming force are not assessed.
図で条件を整理してから計算し、最後に実際の部品仕様を確認します。
Understand conditions with diagrams, calculate, then verify actual specifications.
