I had good success making flat patterns for corrugated fiberboard (cardboard commonly used in packaging). I am posting the sheet metal settings here because I didn't find them anywhere else.
This forumla comes from Inventor Reference Guide > Work Environment > Styles and Style Libraries > Work with styles > Linear:
Unfolded length = (inner Bend Radius + KFactor*Thickness)*(Bend Angle)
where bend angle is in radians.
For corrugated_fiberboard, let inner Bend Radius = 0 and let KFactor = 1 (no stretch on outside, inside compresses).
Setup "corrugated fiberboard" sheet metal style in the Style Editor:
from a sheet metal part, ribbon > Manage > Style Editor
> Left pane, Sheet Metal Unfold, Default_KFactor > New > Name: corrugated_fiberboard_KFactor
> Unfold Method: Linear, KFactor Value: 1 ul
> Left pane, Sheet Metal Rule > Default > New > Name: corrugated_fiberboard
> Sheet tab > Unfold Rule: corrugated_fiberboard_KFactor
For thickness, refer to http://en.wikipedia.org/wiki/Corrugated_fiberboard#Manufacture_of_corrugated_board > Standard US Corrugated Flutes
> Bend tab > Bend Radius: .0001
> Save
Before you save Styles to Style Library, make sure your Style Library is Read-Write. Close project files and then from Projects:
Use Style Library = Read-Write
To save a style:
Ribbon > Manage tab > Styles and Standards panel > Save icon > click "Yes to All", OK
Changes made to a style library are not available in other documents until the current Autodesk Inventor session closes and a new session is reopened.
To make a fiberboard mock up, print a 1:1 scale drawing, contact cement drawing to fiberboard, cut, fold, and hot glue.
Solved! Go to Solution.
you should post back to this again, with the words "Solution is the original post" then we can mark it as Accept As Solution for you. Great work & thanks for sharing this with the community.
Scott Moyse
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Design & Manufacturing Technical Services Manager at Cadpro New Zealand
Co-founder of the Grumpy Sloth full aluminium billet mechanical keyboard project
hi' i've reproduce the setting you listed here and i still get and outside radius
what i'm trying to acheive, maybe you can tell me if it's impossible or what but i want the folded model to have square looking bend, that mean having the minimal outside radius, even none if its possible