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Subracting with a self-intersecting body

Subracting with a self-intersecting body

Subracting with a self-intersecting body

(OP)
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?

RE: Subracting with a self-intersecting body

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.
 

RE: Subracting with a self-intersecting body

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

----
kukelyk

RE: Subracting with a self-intersecting body

(OP)
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?

RE: Subracting with a self-intersecting body

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.
 

RE: Subracting with a self-intersecting body

(OP)
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!

RE: Subracting with a self-intersecting body

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.
 

RE: Subracting with a self-intersecting body

(OP)
Thanks guys!  That is what I needed.

RE: Subracting with a self-intersecting body

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

Nil Desperandum illegitimi non carborundum

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