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How to model this ??
4

How to model this ??

RE: How to model this ??

What version of NX are you running?

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
UG/NX Museum:

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

RE: How to model this ??

Just one possible method, there could be more ways.

I would create the helical arc, and then copy them in a circular manner. From there, you could use the "Emboss" function.

RE: How to model this ??

Depending on the version of NX being used, this could be done in NX Sheet Metal.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
UG/NX Museum:

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

RE: How to model this ??

(OP)
I am using nx 9

RE: How to model this ??

2
The 2D drawing leaves a bit to the imagination, but attached is a one way to model something close. I tried several other methods such as modeling the overall body, such as a swept solid and adding cutouts, but they all had problems with missing faces and such when the blend radii were added.

RE: How to model this ??

(OP)
Dear mmauldin, i cannot open the file you uploaded its having 0 byte size.. can you check it again

RE: How to model this ??

Hi Mmaulkin,

How did you create the spline?

RE: How to model this ??

Insert>Curve from Bodies>Extract Curve>Isoparametric Curve

RE: How to model this ??

Brilliant mmauldin....
Kapil

RE: How to model this ??

(OP)
Awesome sir.. thanks

RE: How to model this ??

(OP)
Hi Bwsh

I cant open it in NX9,
is there anyway??

RE: How to model this ??

(OP)
Thank you so much Bwsh..
its just what i wanted
i would like to know what is the difference B/n Pattern feature and geometry.

RE: How to model this ??

sk258013, as the name implied, i think i know the differences.
I would leave to the experts in this forum to clarify them more correctly.

RE: How to model this ??

Do we need to complicate this model this much ?
If i look at the image from Bwsh, it's a hollow cylinder , with diagonal grooves.
Modeling this as a "cylinder" instead of sweeps should simplify the task.
( Extruding a circle will create a cylindrical face as well as using the feature "Cylinder".)


- If the end result should be cylindrical, and we do not have a purpose creating a far more complex face such as a helical B-surface, Go cylindrical.


Regards,
Tomas

RE: How to model this ??

Bwsh uses a method I like, although the cylinder option is my favorite.

As John hinted before, how can this be done in sheet metal ?
I know it is not possible to roll form a cylinder from sheet (not in NX9 that is).

Older budweiser
NX8.5 & NX9.0 64bit, hp z820

RE: How to model this ??

PrintScaffold, that's not a roll formed cylinder. Roll forming is creating a cylinder by roll forming a flat sheet.
That feature is not available in NX, http://www.eng-tips.com/viewthread.cfm?qid=318888.



Older budweiser
NX8.5 & NX9.0 64bit, hp z820

RE: How to model this ??

In NX Sheet Metal, you don't really start with a flat sheet and then form it into the desired shape. Rather you model the desired shape and then flatten it so as to have the blank that manufacturing would start with. In this case, using the Contour Flange as suggested by PrintScaffold.

John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Digital Factory
Cypress, CA
Siemens PLM:
UG/NX Museum:

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

RE: How to model this ??

Back to where / why / what this example is about.

The example , the image, shows quite a few signs of being a student example from a workbook and not a real world model for a machine. - right ?
The information in the image is way to thin/ non-existing to model this correctly.
"Twisted surface" can mean absolutely anything.

The "There is hint/note given in image to create twisted surface by line angle/normal to curve..."
can then , in a "student example for a different cad system" be a requisite for that other cad system to be able to fulfill the task.
It does not say anything about the shape at all!
If we divide the outer cylindrical shape as Bwsh has done, it is both "twisted" and "cylindrical". It fills the requirement "twisted".

The shape that Mmauldin created, is "twisted" but not cylindrical, - what more can we say about this particular shape ? - "un -defined" ?
"Linear sections" ?

There is an unlimited number of shapes a curve can have between two points, and "twisted" does not help much. Neither does the supplied image.

Regards,
Tomas

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