Subracting with a self-intersecting body

[smanderle]

I am trying to subract a body that is swept around a helix that self-intersects after one turn from another body. The location where self intersection occurs does not subtract properly and leaves some additional face geometry after subtraction. Is there some way to create the subraction and avoid the faces being left over where the intersection occurs?

 

[JohnRBaker]

Without at least a picture (preferably the actual part file), it would be impossible to speculate as to whether there's a way to do what you ask or not.

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

http://www.plmworld.org/museum/

To an Engineer, the glass is twice as big as it needs to be.

 

[kukelyk]

Try to split the tool body, and substract one after the other..

----
kukelyk

 

[smanderle]

I have tried splitting the tool body and subrtacting in multiple orders and I get a "thru face does not intersect path of tool" error. The only way i have been able to get around it is by creating two helixes and two swept bodies, but I was hoping for an easier solution.

Is there a way to post a picture?

 

[JohnRBaker]

Use the upload file option and attach a .jpg image.

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

http://www.plmworld.org/museum/

To an Engineer, the glass is twice as big as it needs to be.

 

[smanderle]

I need to see at least one full revolution because the 'breakout' geometry is important for what I am doing. Since it intersects after one revolution and leave the additional geometry after subtraction I am unable to accurately represent the solid.
Thanks!

 

[cowski]

Which version of NX are you running?

With a little bit of fudging I ended up with the attached (NX6 file).

 

[JohnRBaker]

Cowski, I think you have the helix going the wrong direction. That being said, I was going to attempt virtually that same thing (but with the correct helix direction).

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

http://www.plmworld.org/museum/

To an Engineer, the glass is twice as big as it needs to be.

 

[smanderle]

Thanks guys! That is what I needed.

 

[hudson888]

PS the body looks for all the world like a circular section, as would commonly be used in a spring. Why not in that case use a tube rather than a sweep. It is usually easier.

Best Regards

Hudson

www.jamb.com.au

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