unbend-problem.PNG

Forum|Forum|10 years ago
August 10, 2016
5 replies
3105 views

I am having difficulties trying to unbend this sheet metal part. It curves in multiple directions and I've tried to use the Cross Section Driven Unbend with no luck. there are several similar part to this one that I'm having problems with. Any ideas?

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General

StephenW

23-Emerald III

One discussion about something similar Unbend

From my standpoint, sheetmetal module can't unbend this and give you an accurate flat pattern since it is not a press brake type operation, it's more of a stamping type operation.

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dschenken

1-Visitor

You can force some shapes like this to be flat but Creo doesn't calculate the amount of deformation and material thinning that will happen in the real formed part. The cases I've seen look pretty unrealistic. If you need this sort of thing, you will likely start with a rectangle that is die formed through several steps and is then sheared to final outline.

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cnorkus

Author

1-Visitor

How would I go about forcing to flat? This is just one small piece of a much larger part that in production will be vacuum formed or roto-molded, but my bosses want a steel version for a "prototype" before they will spend the money on a mold for a plastic one. It does not have to be prefect, just close so I can laser the steel blanks, hand form the pieces and weld together...

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dschenken

1-Visitor

I would not bother. Take the surface to a CNC and have a wooden buck made then take the buck to a skilled sheetmetal former - the sort who does custom automobile or aircraft work.

Like this example: Building a Fender - Part 1 - YouTube

You won't need to do the first part - you already have a model. At the very end he roughs the pattern with kraft paper.

Then comes the magic trick Building a Fender - Part 2 - YouTube

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Tmetcalf