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bcat1-Visitor
1-Visitor
February 14, 2021
Question

unbend a designed part model & convert to sheetmetal

  • February 14, 2021
  • 2 replies
  • 3955 views

hello

 

I need some steps for unbend a part model and create flattpattern for this.

i try to reconstruct radius but i'dont know if is the right way to unbend because the part dont convert to sheetmetal

How can i identify radius without same thiskness features of the part ?

 

Please some advices 

 

Thank you for support

2 replies

tbraxton
tbraxton22-Sapphire II
22-Sapphire II
February 14, 2021

The 3D model you posted is a STEP file, Creo is not going to create a flat pattern of this in sheet metal mode. I would use the step file as a template in part mode to create a sketch of the bent profile extruded to the part blank width and then thicken that to a constant thickness. You can then convert this part to sheet metal and add all of the cutouts again using the step as a reference. You need to insure that you do not create references to any step model geometry so that your part will regenerate when you delete the step import feature from your native Creo model.

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pausob19-Tanzanite
19-Tanzanite
February 16, 2021

Actually, if the STEP geometry of uniform thickness, then it should be possible to switch to sheetmetal mode, establish the driving surface and then use the conversion feature to reconstruct the bends, rips and reliefs, and then also the flat-pattern:

pausob_1-1613449797868.png

-->

pausob_0-1613449518121.png

 

P
pausob19-Tanzanite
19-Tanzanite
February 16, 2021

This conversion is possible, though I needed to do some preparation before the sheetmetal conversion.

Namely, there are 3 places where the wall thickness needs to be restored to the uniform thickness:

pausob_1-1613450570589.png

I've done this by deleting the chamfer faces with the remove tool:

pausob_2-1613450687946.png

 

Depending on your needs, you can also remove the rounded bend surfaces from the geometry and then redefine them during the conversion.  This is not necessary for flat-pattern to be developed, but is handy if you want to change the bend radius:

pausob_0-1613450356605.png

 

    tbraxton
    tbraxton22-Sapphire II
    22-Sapphire II
    February 16, 2021

    I was not aware that Creo would flatten an import feature. I am thinking this was an enhancement in some release that I missed. There are enhancements mentioned in the Creo 5 release notes specifically mentioning legacy CAD data. Definitely enhanced from Pro/E release 12....

     

    https://support.ptc.com/help/creo/creo_pma/usascii/index.html#page/whats_new_pma/sheetemetalconversion.html 

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