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Bolean operations

U

users4

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Hi,


I have a model created in Pro/E. This consists of 3 volumes asembled together. Now I need to insert this model into a thin cylinder and then subtract the volume of the model from the cylinder volume to get the flow domain- I'm doing a CFD analysis and this subtracted region is my region of interest.


Is it possible to do this subtraction in Pro/E? Does Pro/E do Boolean opeartions? Also, I want to export this subtracted region to the CFD software? How do I do this?


Thanks,


Vidya
 
Hi dear ur question is not clear, u seems to be a non user of proe, proe doesnt have booleon, substract,union commands etc,
it has cut ,protrusion etc.
i assumes that u have an assembly of three parts and u want to substract the total volume of these three parts from a thin cylinder.
u can assemble the cylinder to this assembly and
go to,edit, component operations ,cutout cammand.

do three cutouts on the culinder.
smiley1.gif
 
Hi Dibz,


Thanks for the reply. What I actually want is this- subtract the total volume of the assembled model (which contains 3 volumes) from that of the cylinder. This subtracted region is my main interest for the fluids analysis. I want to study the movement of the model according to flow with the CFD software. For this I have to get the flow domain, which is given by the subtracted region. How do i get this with Pro/E?


This is something like Autocad does- for example, if a cone is inserted into a cylinder, then the volume of the cone subtracted from the cylinder gives the subtracted domain. This is similar to what I want.


Can I get this with Pro/E?


Thanks
 
Hi dear, then it is same thing what i said.

u can assemble all the 4 parts 2gether exactly how u require,
then go to edit,component operations, cutout, this has to be done separately 3 times for substracting 3 compenents from the cylinder.
this is like what u said in autocad,
cutout cammand substracts one parts from other,

there is one more thing u can do,copy all surfaces from the three models and merge them 2gether and make a closed quilt, and make a cut using quilt from the cylinder.

hope this serves ur purpose
smiley1.gif
 
Hi Dibz,


I wasn't able to merge all the 3 inner volumes together. Pro/E wouldn't allow me to do that. This is what I did-


Edit- Component operations- copy- selected the 3 inner volumes- Merge.


But somehow, this didn't work. Can you tell me where I WENT WRONG?


Thanks.
 
Hi,


When I used the CUT OUT option, I got only one half of the whole model cut out. for some reason, it wouldn't let me do the same for the other half. I wonder what the reason could be?


Just for clarification, the cut out option is used in the Assembly mode, right? As far as my understanding goes, if any changes are made to the assembly file, the part file should be automatically updated........ I do not find that happen in my case. What could possibly be wrong??
 
Also can you explain the copying to make a quilt technique that you mentiones earlier. I'm still a brand new user and just learning stuff.


Thanks.
 
Hi Dibz,


Here is my model. I have included the two prt files (model_temp.prt and leafletsurfaces.prt)that were assembled to make the model (veinvalve.asm) , the cylinder, and the final model assembled into the cylinder (valvemodel.asm) .


Thanks.2006-06-07_091703_Files.zip
 
Hi Dibz,


What I want is the volume of the ebtire model subtracted from the volume of the cylinder. This is because I want fluid to flow in between the two flaps in the model as they are in the open position. So fluid enters from the bottom of the cylinder, enters the model, and then exits at the top of the cylinder. All this happens when the two flaps (leafletsurfaces.prt) are open. So I want to trace that fluid path.


That's why i want the subtrated region. Is it possible to get this from the cut out operation? Also, Icouldn't open your STEP file. Do I have to open it as a part file or assembly file?


Thanks a lot.
 
Hi Dibz,


I tried to do the cut out by myself, but am not sure ifI did the right thing..........the model looks just like before. Could you please tell me the steps that you followed to do this operation?


Thanks.
 
HI
step file u can open in any 3d software. open it as a part and see,i have attached the valve part after subtraction,

plz say u wanted it like that or not. if not dont hesitate to replay me bak,
 
Hi Dibz,


I opened your STEP file on the Fluent software. But obviously, it gives no indication of which volumes were subtracted.As I explained earlier, all the inner volumes are to be treated as one unit, i.e. (the model_temp.prt + leaflet surfaces.prt). This entire unite is to be subtracted from the cylinder volume. If this is what you did, then it's perfect. The CFD software gives no indication of the operations that were performed in Pro/E to obtain the geometry.


Also, please explain the steps that you followed to do the cut out opeartion.


Thanks a lot.
 
Hi,


Another thing that I wanted to mention is that after the subtraction, there should be just one volume, and that would be the volume of interest i.e. the flow path. Also is there any way to smooth out any small edges, sharp angles etc ?
 
Hi,


When I look at my model assembled inside the cylinder, I find that it looks as if there are several scratches or holes on its surface. But when i zoom in close enough, it seems OK. Is it just some visual effect or is there somethinh inherently wrong? I've attched the file.


Als, I still haven't been able to create the cut out that I wanted. Wondering if there's something that I'm missing out.


Thanks.2006-06-08_120424_Files.zip
 
users4 said:
Hi,


When I look at my model assembled inside the cylinder, I find that it looks as if there are several scratches or holes on its surface. But when i zoom in close enough, it seems OK. Is it just some visual effect or is there somethinh inherently wrong? I've attched the file.


Als, I still haven't been able to create the cut out that I wanted. Wondering if there's something that I'm missing out.


Thanks.2006-06-08_120424_Files.zip
Click to expand...


It auto hides small surfaces to simply the display and save computing time. Go to View->Display Settings->Model Display-> Shade tab-> check small surfaces if you do not want them to be auto hid.
 
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