Adding variable flared lip to sheet metal part 2

[lurks]

I am trying to duplicate the flared lip shown in the attached drawing. I am not sure as to how to go about this due to the fact that it is not constant around the entire radius. The angle goes from 15 degrees to 0 as it approaches the tangential point that the straight side meets the radius.

Thanks,

Lurks

 

[JohnRBaker]

Considering what the section view shows, it's even more complicated than that since it appear to transition from a simple flared (tapered flange) at the top of the arc, to a 'joggle' when it reaches the straight section. Certainly there is nothing in NX Sheet Metal which could model this directly.

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

http://www.plmworld.org/museum/

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

 

[hudson888]

It is hard to see and nowhere is the size of the joggle shown but I think it may actually go from a joggle on the sides to a kind of flared joggle in the middle of the arch. More of a pressed form that something you'd be able to create with a folding process of any sort so something you'd probably model quite easily as a shelled solid, but probably not quite appropriate to sheet metal as I'd interpret it.

I would develop the top and bottom profiles of the flange without the joggled portion and radii as two separate closed section sketches on the end view then simply create a ruled or through curves solid to be united with the main U-section (extruded earlier), then blended and shelled.

Best Regards

Hudson

www.jamb.com.au

Nil Desperandum illegitimi non carborundum

 

[mmauldin]

I took a stab at it, see if this part helps.

The file was created in NX6.

 

[lurks]

mmauldin,

I can not open that file. I am currently using NX5.

Thanks,

Lurks

 

[mmauldin]

Try this.

 

[hudson888]

Lurks/Mike,

See attached as described earlier. No need to use through curve mesh which approximates the radii when you can stick to a simple method. I've left in something of Mike's model though modified to show the method, but I'll follow up with something even simpler.

Best Regards

Hudson

www.jamb.com.au

Nil Desperandum illegitimi non carborundum

 

[hudson888]

It occurred to me while modelling the first that this second construction would be equivalent, but simpler. The earlier version probably does have application to a wider variety of different joggled lips but for this particular case the alternative is instructive.

Best Regards

Hudson

www.jamb.com.au

Nil Desperandum illegitimi non carborundum

 

[lurks]

Thank you all, your help has been much appreciated.

 

[mmauldin]

Straight from the "Department of Can't Leave Well Enough Alone", another version using a swept face but incorporating true blend radii.