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Managing thickness of an igs file

mmelenli
4-Participant

Managing thickness of an igs file

Hello everyone, i've been working on this file(s) for a quite some time now as part of my thesis. So far im stuck and asking here seems like my final solution, don't know what else to do really.

 

The goal here is to have 2mm of thickness on the whole part. and of course it is not possible to simply use the shell command. I've found a solution with "2 sketches + fill + merge + solidify + extrude" method but i just simply can't get 2mm thickness (or any other thickness). I will add some pictures for you to see what I've tried to do exactly.

 

The second version of this part (name starts with "Testcase") has no thickness, seems actually pretty easy with thicken command but like the first igs file, there are so many gaps on the part and i just can't make it "closed" completely. The second version also needed scaling but that was not a problem (scaling 180/700 is okay).

 

So I've hit a big brick wall here with this task. I hope someone can help me with it.

2 REPLIES 2
StephenW
23-Emerald II
(To:mmelenli)

I can't open your file, but you may have an accuracy issue. 

Go to File - Prepare- model properties - Accuracy change 

Try making the accuracy number smaller

If it's set to relative, try setting to absolute.

Make sure you have saved prior to making these changes. Sometimes accuracy changes will cause unexpected failures.

This post has good info on accuracy: https://community.ptc.com/t5/Manufacturing/Absolute-vs-Relative-Part-Accuracy/m-p/267380

 

 


@mmelenli wrote:

Hello everyone, i've been working on this file(s) for a quite some time now as part of my thesis. So far im stuck and asking here seems like my final solution, don't know what else to do really.

 

The goal here is to have 2mm of thickness on the whole part. and of course it is not possible to simply use the shell command. I've found a solution with "2 sketches + fill + merge + solidify + extrude" method but i just simply can't get 2mm thickness (or any other thickness). I will add some pictures for you to see what I've tried to do exactly.

 

The second version of this part (name starts with "Testcase") has no thickness, seems actually pretty easy with thicken command but like the first igs file, there are so many gaps on the part and i just can't make it "closed" completely. The second version also needed scaling but that was not a problem (scaling 180/700 is okay).

 

So I've hit a big brick wall here with this task. I hope someone can help me with it.


Hi,

I tested your Testcase_Spirale_v20190520.iges surface model. I think it contains problematic geometry. To get thickened geometry, you have to repair surface model.

Suggestion:

1.] open Testcase_Spirale_v20190520.iges surface model

2.] create datum plane DTM1 offset from RIGHT

dtm1.png

3.] trim model geometry using DTM1

trim.png

4.] thicken current model geometry

you will get following warning ... I guess it tells you that geometry is "suspicious"

warning.png

click YES, Creo creates solid geometry

ticken.png

zoom in ... you will see problematic geometry (magenta and yellow color)

geom1.png

... now you have to resolve this problem

 

Note: You can modify dimension related to DTM1 to see more thickened geometry. If regeneration fails after modification then you know that you hit another problematic geometry.

geom2.png

Good luck ...


Martin Hanák
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