Siemens NX 11.0 - Unbend Tube with Global Shaping

Use the Global Shaping command to deform a surface region using a combination of geometry and values, the relationship of two curves, or the relationship of two surfaces. Combinations of geometry and values are provided by 11 Types of Global Shaping.
Global Shaping lets you deform a surface in a predictable manner, with full associativity. You can use it to alter existing surfaces while preserving their aesthetic properties. You can also use it to modify surfaces to account for the effects of springback during metal forming.
By Curve
Deforms a sheet body or facet body by editing a reference curve. You select a base curve and optionally a control curve. The deviation between the base curve and the control curve determines the amount of offset that is applied to the new sheet body at any given point.
You can select a base curve and then edit its shape to produce a control curve, or you can select both a base curve and a control curve, and then edit the shape of the control curve.

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