deformed parts moving in an assembly
deformed parts moving in an assembly
(OP)
OK, here's something I haven't seen before. I hope someone can tell me why this is happening so I can fix it.
I have a deformable part that is used in 4 places in the same assembly. The parts were made deformed in the assembly after they were all added and constrained. I also tried making the parts deformable before adding to the assembly then deforming them when they were added. Every combination end in the same results. When they are deformed, they move to the original location they came into the assembly at. They override all the dimensions and new dimensions don't have any effect on them. This includes using the Fix and Bond constraints. I have included a picture of the assembly using only the parts. One is before the deform, and all had fixed constraints, and the other is after the deform. As you can see, they have moved and there is no way to make them move to a different location after they are deformed. Any ideas what is causing this?
I have a deformable part that is used in 4 places in the same assembly. The parts were made deformed in the assembly after they were all added and constrained. I also tried making the parts deformable before adding to the assembly then deforming them when they were added. Every combination end in the same results. When they are deformed, they move to the original location they came into the assembly at. They override all the dimensions and new dimensions don't have any effect on them. This includes using the Fix and Bond constraints. I have included a picture of the assembly using only the parts. One is before the deform, and all had fixed constraints, and the other is after the deform. As you can see, they have moved and there is no way to make them move to a different location after they are deformed. Any ideas what is causing this?





RE: deformed parts moving in an assembly
NX 7.5.4.3
Teamcenter 8.3.2
Dell T3600 Precision
RE: deformed parts moving in an assembly
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.
RE: deformed parts moving in an assembly
RE: deformed parts moving in an assembly
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.
RE: deformed parts moving in an assembly
RE: deformed parts moving in an assembly
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.
RE: deformed parts moving in an assembly
Since I need the flat pattern for this part, I may have to get creative and WAVE link a body into the modeling space of the drawing,convert that to sheet metal and get the flat pattern from there. This is going to take some tinkering and testing to overcome this flaw. Does this behavior still exist in versions 8.5 or 9?
Thanks for your time and effort John,
Scott
RE: deformed parts moving in an assembly
However, to really be definitive, I would have to start from scratch creating new NX 9.0 parts using the Sheetmetal Contour Flange function, particularly if the problem was with the SheetMetal features to start with.
Your best bet might be to contact GTAC and have them provide the parts to development where they can determine what is exactly happening and they will be in a better position to know if something has been done or not, and if not, then we now have something that development can work with to fix the problem in a future release of NX.
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.
RE: deformed parts moving in an assembly
RE: deformed parts moving in an assembly
And yes, Deformable Parts show odd behavior in NX 8.5
We don't use the sheet metal application, however many times perfectly restrained already deformed parts, suddenly jumps in space when we tried to change the value of deformation.
As a workaround we switched to Reference Sets.
RE: deformed parts moving in an assembly
RE: deformed parts moving in an assembly
But this problem was fixed in NX8.5.3 with mp03.
RE: deformed parts moving in an assembly
Millimeter, I was debating if alt reps would be better to "simulate" the deform parts. Alt reps make it easy to pick predefined sizes but have extra baggage. Have to look into ref sets further.
Sorry to hear you can't contact GTAC when needed. If your management could only understand that one or 2 emails (> 5 minutes of your time) or 1 phone call (> 10 minutes) could save hours+ of your time trying to find a workaround. I hope they let you use the knowledge base GTAC has. It has a vast amount of knowledge stored there.
RE: deformed parts moving in an assembly
What I did was I took my Deformed part and after creating the Deform Feature I converted it to a Sheet Metal model, which can now be flattened and/or Flat Pattern drawings created from it. I've attached a new set of part files with these changes. Note that the Deform part has both the formed model for placement into your Assembly and a Flat-Solid which can be used to manufacture the blanks for what I assume to be something like a 'leaf' spring. And when you open the assembly they can still be deformed as desired without any unexpected behavior.
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.
RE: deformed parts moving in an assembly
I filled an IR yesterday with GTAC. The behavior was show to be the same in versions 7.5, 8 8.5 and 9 so it was converted to a PR, status 2.
RE: deformed parts moving in an assembly
We noticed the same behavior (Deformable parts moving to their inserted position after deforming in Assembly)
In our case the issue was that we used (in the deformable part) an ABS CSYS instead of a Dynamic CSYS as a reference.
I know this happened in NX7.5. I haven't checked in NX8.5 though.
Ronald van den Broek
Mechanical Engineer
Cad Environment Coordinator
Wärtsilä, Propulsion Services
NX8.5.3 / TC9.1.2
HPZ420 Intel(R) Xeon(R) CPU E5-1620 0 @ 3.60GHz, 32 Gb Win7 64B
Nvidea Quadro4000 2048MB DDR5
HP EliteBook 8570W Intel(R) Core(TM) I7-3740QM CPU @ 2.70GHz, 16Gb Win7 64B
RE: deformed parts moving in an assembly
Scott
RE: deformed parts moving in an assembly
This behavior was noted by GTAC to occur in all versions: 7.5, 8, 8.5 and 9. The other thing they found was that, while this occurred sporadically with non-sheet metal parts, it almost always occurred with sheet metal parts.
Just wanted to let everyone know what the resolution was.
RE: deformed parts moving in an assembly