To create a spinal bend in Creo 3.0 you need solid geometry to bend, and a curve to be the "spine" profile. Below is the sketch for the extrude that will be our solid geometry for this example:
For the spine profile, if you want the same length for the sketch, you can use the perimeter dimensioning tool within a sketch to set the perimeter dimension, or you could use relations.
To use the perimeter tool you click perimeter in the dimension group:
Then you select the entities that you want to include in the dimension (hold control to select multiple entities)
You will then be prompted to select a driven dimension. In this case I've chosen the length of the line segments to be the driven dimension. It adds var after the dimension, making it so this dimension will now be determined based off the perimeter dimension and any other driving dimensions.
Once you have your sketch and solid geometry, you can begin the spinal bend.
The spinal bend icon is within the engineering group.
When selected, the spinal bend tab activates as shown below:
Next, select the geometry to bend, and select the spine within the references flyout.
The spinal bend will display as shown, and can now be completed.
This is with the bend entire selected geometry from spine start option, but you can also bend from spine start to specified depth, or bend from spine to selected reference.
Below is the same selected spine and solid geometry, but it is now set to bend to a specified depth of 50 with a locked length.
If you uncheck the lock length, the original length will not be preserved, and will display as shown below.
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