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Prudhomme Jules

Decrease diameter of cylindrical die

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Hi;

I'm working on Hypermesh V13.0 and I have to mesh a cylindrical die oncoming from Solidworks ( Save as .STEP AP203).

On Hypermesh I want to decrease the external diameter of the die for exemple I want to mesh the die with this different diameter : Ø40 / Ø35 / Ø30 / Ø25.

This operation is possible with Solidworks but it's very long lasting because I have to mesh 14 die with four different Ø (--> 56 similary meshing).


And for my simulation is better if I have the same meshing on every diameter.

My approach for this is :

1st : I import geometry which is step file type : For beginning I import a die Ø40.

2nd : In "GEOM" tool menu I use quick edit for decrease my Ø; for this I use the washer split with an offset value : 2.5 (to have 5mm on the Ø). After I supress the older lines with toggle edge (the older lines are on dotted line).

DieØ40.PNG-->DieØ30.PNG

And now I fail to mesh my new geometry (with F12 tool menu) 

When I use (size and bias) :
Surf --> Dis
play --> Mesh : The older lines (dotted) are meshing. :(-->

fail-meshing-display.PNG

Surf --> By Window --> I select the lines which I want meshing --> The older lines aren't meshing (:)) but I don't have mesh on the new external surface of the die :( as the die is hollow.

fail-meshing_bywindow.PNG--> OK // fail-meshing_bywindow_2.PNG--> External surface NOK

I think my approach for decrease the external diameter isn't good. I think I have to create a new surface but I just create news lines.

For your information I don't have the center of my die in hypermesh

I hope you understand my problem and you can help me. 

 

Jules PRUDHOMME. 

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Hi,

Toggling lines does not delete the surface.

 

In your case you can either scale using tools>>Scale or use HyperMorph on mesh to reduce the dia.

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Hi Udhay and Prakash;

 

Udhay : Where is the ruled option in HyperMesh V13.0 and how I can use this tool in my case ? I'm sorry I'm beginner in hypermesh !

 

Prakash : I have never used Hypermorph and I don't know how use Hypermorph; in Hypermorph which tool I can use ? morph constraints / morph volumes / morph / morph options / etc ... ?

 

Thank you a lot for you valued assistance !

 

J.PRUDHOMME

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Hi J.Prudhomme,

 

You can use Morph>>Alter Radius. 

 

There are few tutorials available on HyperMesh on HyperMorph to get started :) 

HYperMorph.PNG

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Mr PAGADALA;


When I try to decrase the diameter thanks to Hypermorph>>Morph>>Alter dimensions.

I fail to select my domains I don't understand what is the domains !! For use Hypermorph; the die have to be meshing or I can use Hypermorph only with geometry ?

 

I must be successful for this operation because me and my working team are wasting time to decrease the diameter on Solidworks !

 

And the last question : Were are the tutorials available you mentionned ?

 

Thank you a lot !!

J.PRUDHOMME 

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Hi,

 

You can check tutorials in HyperMesh tutorials. There a lot of tutorials which tells how to create domains.

 

 

Morph2.PNG

MorphTutorials.PNG

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Hi Udhay and Prakash;

 

Udhay : Thank you for you reply; this solution works for my problems but when I include my HM model in Forge Luncher ; Forge Luncher doesn't mesh the model in 3D. I think my problem can't be resolve with GEOM tools.

 

Prakash : Is good for me; I have succeeded to decrease my model with Hypermorph; latter problems : when I decrease the diameter of my die the cylinder isn't decrease uniformly. I'm starting with a perfect cylinder and finally I have hourglass / double cone :
 Capture.PNG.464dfbe132ef2cae6696e1b3aae35d08.PNG

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2 minutes ago, Prudhomme Jules said:

Prakash : Is good for me; I have succeeded to decrease my model with Hypermorph; latter problems : when I decrease the diameter of my die the cylinder isn't decrease uniformly. I'm starting with a perfect cylinder and finally I have hourglass / double cone :

Not sure, Maybe you need to create more domains

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