Overlapping geometry troubles

[daiosama]

I received step files from my customer for a two shot injection molded part.

One file is of the first shot. The other is of the second shot.

When I pull the two parts into and assembly it is evident that the geometry is overlapping. The external shape is correct, but internally there is overlapping areas. This is causing me all kinds of grief as I am suppose to make 2-d drawings of the final part.

With the overlapping geometry, Pro/e seems to be getting confused for intersecting lines/surfaces so on the 2-d print many lines are missing.

I have tried going into assembly mode and subtracting one part from the other, but the two parts have fairly complex geometry. They originally were surface data from one of the auto manufacturers, then this was converted to a part with catia and then converted to stp and imported by me. So the geometry isn't the best to begin with.

Is there any way to work around this?

 

[design-engine]

make each a separate part in proe and build an assembly of the iges geometries.

you can achieve this by carefully deleting both the rubber portion and it's coincident surfaces then save the proe part. Retrieve the import again and do the same this time deleting the plastic portion and it's respective coincident surfaces and saving that part as a different name then solidify each and build your assembly.

of course you can't ask the customer to give you the native proe file because we don't typically have verbal access to the customer or the sales folks don't let you talk to customer.

 

[daiosama]

As is always, a picture is worth a thousand words so here comes a book

This is the shaded assembly. As a shaded part, all looks fine.

Unfortunately, the actual geometry overlaps. You can see many of the lines that define the edges are missing.

And finally, here is a section showing how much they overlap.

 

[mgnt8]

Edit > Component Operations > Cut Out

 

[daiosama]

Unfortunately the

Edit > Component Operations > Cut Out


Operation says forget you buddy. Or something like that.

I guess the geometry is too complex or the surfaces are just not good enough.




Edited by: daiosama

 

[krow72]

daiosama - have you tried this: in your assem activate your main part. copy all the surfaces of the secondary part. use solidify to cut the quilt from the main part. Also, have you tried to merge the parts in your assem? (edit>component operations>merge) Hope this helps you find an answer.


Krow72

 

[daiosama]

Krow72, I tried this as well and pro/e still won't do it. I am guessing the geometry is too complex and too corrupt..

 

[dgs]

You may have an accuracy issue. Make sure that both parts use absolute accuracy and then make sure they are both set to the same value.

Then, if it still fails, try cutting the two parts in half at the same plane and see if the cutout will work on half a part. If not, try the other half. If not, try a quarter.

The idea is to get a section of the assy where the cutout will work and then move the place that you cut it a little at a time until you find where it fails. That's the area where you have problem geometry. Look around for something that would cause it to fail.

you may have two or more areas with issues, unfortunately.