Deformable spring

[cubalibre000]

Hi,
I'm trying to use the deformable tool in assembly, but when I mate the spring, the shape spring become very strange.
I'm sure that I wrong in the spring method, but I don't know where.
Suggestions ?
Attached the spring and the result image.

http://dl.dropbox.com/u/7283608/Deformable spring.zip

Thank you...

Using NX 7.0.1.7 MP3 and TC8.1

 

[eex23]

I have had the same problem with torsion springs. Later I decided not to use deformable feature because of its unpredictable results. I think it is beter to use reference sets.
I think deformable feature in nx should be changed essentialy in later releases.

 

[t300]

Hi,

the problem is that you've used a sketch based creation.
In the attached example I've created a spring based on law curves, without any sketch.

Hope this helps


Meinolf

 

[eex23]

Hi t300,

if you take a look again to Cubalibre00's posted imgage, you will see the real problem. Your postet spring do not have ends for fixing ("ears").

 

[SiW979]

I couldn't open your zip, but I have used this spring in the past without any problem whatsoever.

Best regards

Simon NX4.0.4.2 MP10 - TCEng 9.1.3.6.c - (NX7.5 native)

www.jcb.com

 

[cubalibre000]

Hi JCBCad and t300,
for simple spring as you are posting, I don't have problem on deforming, but my spring is different.
See the attached image.

Thank you...

Using NX 7.0.1.7 MP3 and TC8.1

 

[eex23]

I think deformable parts have problems with assembly constraints/mating conditions. especialy then you add other (not deformable component) ant constrain/mate it to deformable part.
Also there are some isues about position of deformable component in assembly (if your deformable component has sketch or sketches used to design deformable component).

so, in my opinion, try to use reference sets.

 

[t300]

@cubalibre00

the problem is that teh helix of your spring is controled by another curve. If you change the reference to entire part you see what happens. The helix moves in relation to the CSYS.
If you create the helix with three formulas for X, Y and Z it won't happen.
See my attached example. It is based on my first example with the bended ends added.


regards Meinolf

 

[cubalibre000]

Hi t300,
thank you to dedicate time and effort to my problem.
I'm using NX7 so I can't open you part.
Anyway I will try to open with NX8 that I'm testing to understand you solution.
I will write here if your solution works fine.

Thank you...

Using NX 7.0.1.7 MP3 and TC8.1

 

[cubalibre000]

Hi t300,
it doesn't seam work better.
When I try to mate, it occurs problem on visualization or errors.
I stop to use deforming, time spent for nothing.
Anyway...thank you.

Thank you...

Using NX 7.0.1.7 MP3 and TC8.1

 

[eex23]

As I mentioned above - deformabale component in nx is totaly useless. It is possible to create an example, but if you put it in a an assembly, try to mate it, it gives you a bunch of errors, or stop working....
By the way, dialog for the deformable component was the same in NX2, so nothing have changed until now....

 

[t300]

Hi Cubalibre00,

the thing is that when you deform a component the features were recreated in the assembly.
So one problem is that when you create features of a deformable component based on the WCS, they will be recreated on the assemblies WCS.

Also sketches are a problem. If the sketch include arc there is the problem that for an arc there are two possible solutions.
Circles work much better.

In the deformable components I've created in the past I haven't used sketches.
But please understand that I haven't the time to work out a better solution as shown in the example.

Meinolf