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MBD and Sheet Metal?

Experimenter
Experimenter

Was wondering if anyone was using MBD on sheet metal?  Is there an established standard? Flat patterns and formed models, what is getting PMIs and what is not, Fully PMI'd formed views (drastic increase in time for detailing), Fully PMI'd flat patterns (great for inspection purposes coming off lasers/punches), or combination of the two (fully PMI'D flat with critical dimensions on the formed view).  What is everyone doing out there and how is the shop and vendors handling it?  

 

Thanks

Allen

3 REPLIES

Re: MBD and Sheet Metal?

Valued Contributor
Valued Contributor

I hope Dave Wingrave chimes in on this question.

 

The NIST sample models include a sheet metal example, test case model number 3. The sample supplied for NX is supposed to show how the MBD annotation is added using NX PMI. The latest one I have is from NX 8. The part is not even modeled with NX Sheet Metal, so it is not possible to generate a flat pattern without first converting the model to sheet metal. 

NIST-03-NX8.jpg

After converting the model to sheet metal and generating a flat pattern, the sheet metal flat pattern is displayed in a Model View. PMI can be placed on both the formed and flat pattern Model Views the same way in the same file. It is convenient to flip between flat pattern and formed MBD views by double-clicking the Model Views.

 

sheet-metal-flat-pattern.jpg

 

sheet-metal-mbd.jpg

 

 

 

This seems to be the way the Solid Works community is using both the formed and flat pattern models for MBD.

 

 

 

 

 

 

 

 

 

 

 

Re: MBD and Sheet Metal?

Experimenter
Experimenter

This will be an interestign topic. @Dave_Walker also feel free to jump in.

 

I think the solution to relieve the timestress taken to PMI the sheetmetal parts is best adressed by automating the most created and needed features. Convert to sheetmetal is required to get flat solid and this would in my mind be the locical place to put pmi "automated" features. Of courcethere has to be a way to control what is populated automatically and that mechanism should be well thought of. Perhaps a sheetmetal pmi preferences subcatogory for example. Then when flat solid has more use cases than flat solid by itself, then flat pattern could copy or inherit these PMI objects and even better, the updating could handled in either the flat pattern or flat solid.

 

Some basic things would be Flat max X and max Y dimensions, S=, bend raduis(ses) and callout ItemId/RevID from TC and place it from lower left corner to a preset offset inside geometry as first guess of the position.

Perhaps also material information but that seems to not be everyones wish.

 

Then of course this sohuld be configurable for every companies liking Smiley Happy Plus able to be driven with automation with NXopen which is nowdays almost always there without asking.

 

My idea, please chime in with ours?

 

-NH

 

 

 

Re: MBD and Sheet Metal?

Valued Contributor
Valued Contributor

This raises the question of the purpose for MBD. Is it documenting the function of the part, the manufacturing of the part, or both? 

 

The standard flat pattern view contains no tolerance information, which is normally an important part of MBD. If tolerances are added to features in both the flat pattern and the formed part, which tolerance rules?  What if they conflict?

Highlighted

MBD and Sheet Metal?

Experimenter
Experimenter

Was wondering if anyone was using MBD on sheet metal?  Is there an established standard? Flat patterns and formed models, what is getting PMIs and what is not, Fully PMI'd formed views (drastic increase in time for detailing), Fully PMI'd flat patterns (great for inspection purposes coming off lasers/punches), or combination of the two (fully PMI'D flat with critical dimensions on the formed view).  What is everyone doing out there and how is the shop and vendors handling it?  

 

Thanks

Allen