Spinal bend not-straight bellows

[Søren Spætte]

Hej,

I am trying to spinal bend a bellows that is molded in a
bent state from the beginning, and I want to bend it even
more.
But whatever I do I cannot get the end surfaces to be
plane!

Any suggestions?

tos/recent/714948234/view">

tos/recent/2011228462/view"><edited><editID>S

 

[garymig]

I've done this using a solid model of a bellows and then using the warp command to bend the bellows, you can even have an angle dimension to get the angle you need

 

[dr_gallup]

There have been various models like that using variable section sweep posted.

 

[Søren Spætte]

Hej, thanks for the quick answers.

The problem is that the bellows is created as pre-bent,
so the 'other' end gets distorted when I
try to bend it.

dr-gallup: What do you mean, variable section sweep? I
have the bellows already, but I do not want
to modify the build of the model for various reasons.

I'll try again to post the pics, it doesn't seem to work
in the first post:
http://groups.yahoo.com/group/SorenSpattesVanner/pho
tos/album/23380263/pic/list

<a href="uploads/SrenSptte/2011-03-
<br / target="_blank">09_093455_bellows.zip">2011-03-
09_093455_bellows.zip</a><edited><editID>S

 

[garymig]

use the warp!

 

[garymig]

this bellows was made straight and the bend was done later and is controled with an angle dimension. The jpg is a horrible resolution cause it cant upload larger then 50k file





GaryView attachment 4963

 

[Søren Spætte]

Garymig: I have tried warp, with same result: the other end
gets distorted.
I start with something resembling your picture, then I want
to bend it even more.

View attachment 4966

View attachment 4967<edited><editID>S

 

[garymig]

What if you tried making the bellows without the cuffs, just pattern the convolutions of the bellows and warp that using the bend a picking the face of theone end of the bellows, then add the cuffs later on. I can bend my bellows as much as i need and the ends stay planer.

 

[srieger]

Try adding a straight segment at each end of the spine trajectory.

 

[Søren Spætte]

Hm. tried both suggestions (srieger/garymig), no good.
I just get crooked surfaces in different ways.

It is obvious that Pro/E is trying to keep the top surface
'plane', causing the angled surface to get distorted.

Maybe it's just not possible

Thanks for all help.