sheet metal flat pattern problem

[rasprojects]

Hello,
I have a problem resolving a sheet metal flat pattern situation.

Capture-2 shows the complete corner with on 2 sides a flange with radius from 20mm, and also the corner with a radius from 20mm.
The problem is within the corner with R=20

I modeled it as a solid box and made fillets on the 2 sides and the corner, then i used Shell and got the correct end product. Convert it into a sheet metal part, but its not possible to make a flat pattern from this.
To produce this you need 3 cuts in that corner, so you can make a flat pattern. (Capture-4: see my sketch how it must look like if it would be a flat pattern)
But I’m not able to make these cuts.

This is a problem that i have for more then 2 years and never found a solution.
Is anyone knowing how to solve this?

Best regards,
Richard

[SBix26 · Accepted solution]

Inventor will not provide a proper flat pattern in this case.  I was surprised by how close it got, but the spherical corners simply are not flattenable by Inventor.  They cannot be formed by a simple bend or roll operation, and these are the only types of sheet metal forming that can be flat patterned in Inventor.

A "100% solution" will have to be in a different software application.

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Sam B
Inventor Pro 2020.1 | Windows 7 SP1
LinkedIn

[rasprojects]

Thank you.

Hopefully in the future there will be a solution for it within Inventor.

Again all who participated in this question thanks for your help.

Best regards,

Richard

[eseeleyLUVRU]

Here is my shot at the sheet metal part.. hope this helps!