Unite only specific adjacent faces on two solids; NX7.5
Unite only specific adjacent faces on two solids; NX7.5
(OP)
Hi, I need some help from some NX experts - looks like this is the right place.
I have two solids - two revolved halves of a ring. They are both revolved based on the same sketch and therefore have the exact same profile. At one end, the two revolves have 2 adjacent faces (Clean cut prodile and zero distance between faces). At the other end, the two bodies have a more complex structure, but still have a total of 4 adjacent faces (zero distance).
I need to unite the two bodies to one body, but only at the end where the two revolves meet in 2 adjacent faces. The remaining adjacent faces must not be joined.
Unite command will result in all adjacent faces being joined. Sew command will result in a hollow structure, even though Solid is selected and the profiles of the faces selected are exactly the same. I have tried many other commands with no luck.
Any help will be appreciated! Thanks!
Best regards,
Morten T Nielsen
I have two solids - two revolved halves of a ring. They are both revolved based on the same sketch and therefore have the exact same profile. At one end, the two revolves have 2 adjacent faces (Clean cut prodile and zero distance between faces). At the other end, the two bodies have a more complex structure, but still have a total of 4 adjacent faces (zero distance).
I need to unite the two bodies to one body, but only at the end where the two revolves meet in 2 adjacent faces. The remaining adjacent faces must not be joined.
Unite command will result in all adjacent faces being joined. Sew command will result in a hollow structure, even though Solid is selected and the profiles of the faces selected are exactly the same. I have tried many other commands with no luck.
Any help will be appreciated! Thanks!
Best regards,
Morten T Nielsen





RE: Unite only specific adjacent faces on two solids; NX7.5
Difficult without a pic, but I don't think this is possible because two "adjacent" faces can't be in the same physical space, either physically in the real world, or mathematically in CAD. CAD can't differentiate between two positions if they are the same.
If I'm understanding the part it's kind of like a split ring, in which case you'd be best just to model a (small) gap in I think.
www.jcb.com
NX 8.5 with TC 8.3
RE: Unite only specific adjacent faces on two solids; NX7.5
The trick with the small gap is what we have used so far, but the zero gap is actually dimensioned on the final drawing, and therefore I would like to do without it.
RE: Unite only specific adjacent faces on two solids; NX7.5
Or you could just model a solid ring and then draw the split on with curves.
www.jcb.com
NX 8.5 with TC 8.3
RE: Unite only specific adjacent faces on two solids; NX7.5
Khimani Mohiki
Design Engineer - Aston Martin
NX8.5
RE: Unite only specific adjacent faces on two solids; NX7.5
I drawn split is also the kind of trickery I would like to avoid :)
RE: Unite only specific adjacent faces on two solids; NX7.5
RE: Unite only specific adjacent faces on two solids; NX7.5
Even if you did manage to find a way to unite just 2 of the adjacent faces, the other adjacent faces would never be visible or usable as far as I can see.
Khimani Mohiki
Design Engineer - Aston Martin
NX8.5
RE: Unite only specific adjacent faces on two solids; NX7.5
Various roundings and chamfers are applied to the model at the open end, and therefore I can't just divide it by a surface.
It is a ring for sealing around a piston, and it is machined and then bend afterwards, which results in the complex shapes being adjacent.
I think this simply isn't possible.
Thanks anyway for the suggestions!
RE: Unite only specific adjacent faces on two solids; NX7.5
www.nxjournaling.com
RE: Unite only specific adjacent faces on two solids; NX7.5
Still think I'd go with a very small gap though (see attached) which is more realistic.
www.jcb.com
NX 8.5 with TC 8.3
RE: Unite only specific adjacent faces on two solids; NX7.5
Carlharr, I think you are correct, in that it is not possible, in the physics of CAD, to have the same body with different faces in the exact same space.
RE: Unite only specific adjacent faces on two solids; NX7.5
Thanks, have a good weekend.
www.jcb.com
NX 8.5 with TC 8.3
RE: Unite only specific adjacent faces on two solids; NX7.5
John R. Baker, P.E.
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Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
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