How to model this ?? 4

[sk258013]

Hi

i am not able to model this 2D drawing.. pls check the attachment
and help me

 

[PrintScaffold]

I know it is not possible to roll form a cylinder from sheet

Why? If you mean conventional cylinder, it's pretty doable in Sheet Metal.

http://www.cadroad.com

 

[RUGmechanic]

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

 

[JohnRBaker]

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.

 

[mmauldin]

While it's true that a cylinder is the easiest, most direct method, if you look closely at the drawing it suggests that the outer surface has more of a "pillow" like texture.

Cylinder method model attached for 7.5 users.

 

[sk258013]

There is hint/note given in image to create twisted surface by line angle/normal to curve...( see attachment)

is there possibility to make it easier by line

 

[Toost]

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

 

[Toost]

Here's an example on what the "drawing" actually allows. There is nothing in the image that rules this radical example out.
-It's all up to the personal perception on what you see in the image.

Regards,
Tomas

 

[Ehaviv]

Hi mmauldin a section view on your part twist_body_3 show that
the groove is not symetrical and I think it shoud be ?

see the magenta colored faces

attached prt and jpg files

 

[Ehaviv]

jpg file

 

[Ehaviv]

SORRY !!! my view section plane was wrong