Inventor General Discussion

Inventor General Discussion

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sinus19
Posts: 25
Registered: ‎08-24-2012
Message 1 of 12 (1,358 Views)

Creating an Air Bag (suspension)

1358 Views, 11 Replies
02-20-2013 08:43 PM

Hey guys!

So i am modeling a trailer's suspension and im to the point where i need to add the Air Bags... I made an assembly that consist of 3 parts. Top plate, Rubber Bag, and Bottom Plate... The quesion is: How do i make the Bag (With the bottom plate attached and top plate attached) act like actualy rubber that flexes, compresses and extends?

I have attached the assembly so you guys can see.

*Expert Elite*
JDMather
Posts: 28,246
Registered: ‎04-20-2006
Message 2 of 12 (1,318 Views)

Re: Creating an Air Bag (suspension)

02-21-2013 03:24 AM in reply to: sinus19

sinus19 wrote:

I have attached the assembly so you guys can see.


An assembly *.iam without parts *.ipt files is useless.
You must attach the part files.

 

This question has been asked in the past, a search might turn up a solution.

Please mark this response as "Accept as Solution" if it answers your question.
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Contributor
sinus19
Posts: 25
Registered: ‎08-24-2012
Message 3 of 12 (1,297 Views)

Re: Creating an Air Bag (suspension)

02-21-2013 07:41 AM in reply to: JDMather

Oh shoot... this should work now, they are all 3 parts.

I've looked ALL over the internet and havent found anything.

Distinguished Contributor
tmoney2007
Posts: 247
Registered: ‎09-06-2011
Message 4 of 12 (1,285 Views)

Re: Creating an Air Bag (suspension)

02-21-2013 09:42 AM in reply to: sinus19

I'd be interested to see if this was possible.  Inventor isn't really made for this kind of modeling.  3DS Max would be a better option.

 

Look into how people drive springs in models like this.

Distinguished Mentor
rdyson
Posts: 918
Registered: ‎04-11-2005
Message 5 of 12 (1,275 Views)

Re: Creating an Air Bag (suspension)

02-21-2013 10:55 AM in reply to: sinus19

Right click DriveMe and drive constraint.

IF you don't understand what I did, you probably need to do some more studying and more tutorials.

Contributor
sinus19
Posts: 25
Registered: ‎08-24-2012
Message 6 of 12 (1,261 Views)

Re: Creating an Air Bag (suspension)

02-21-2013 02:59 PM in reply to: rdyson

Thanks guys, I got the Drive constrain down, and i actully got the Bag to compress and extend (verticly only) BUT, when i place it the Main Suspension Assembly, the bottom plate needs to be at an angle while the top plate is flat. This will require half of the Bag to be in kinda of an angle. I have made the Air Bag Assembly "adaptive" and "felixible" but i still cant get the bag to flex... So the question now is: How do i make the Bottom half of the bag flex?

 

Contributor
sinus19
Posts: 25
Registered: ‎08-24-2012
Message 7 of 12 (1,255 Views)

Re: Creating an Air Bag (suspension)

02-21-2013 03:50 PM in reply to: sinus19

Heres a pic of my problem... Trying to get the bottom of the bag to mate with the arm

Distinguished Mentor
rdyson
Posts: 918
Registered: ‎04-11-2005
Message 8 of 12 (1,224 Views)

Re: Creating an Air Bag (suspension)

02-22-2013 06:27 AM in reply to: sinus19

You Might be abe to do it with a loft instead of a revolve, but the associativity has to be in the assembly where the change occurs.

*Expert Elite*
cwhetten
Posts: 1,090
Registered: ‎09-03-2008
Message 9 of 12 (1,193 Views)

Re: Creating an Air Bag (suspension)

02-22-2013 12:37 PM in reply to: sinus19

Something like this?

 

Air Bag Ani.gif

 

The above is an animated gif.  In case you are viewing this page from Internet Explorer and you can't see the animation, here are the two frames:

 

Air Bag.png

 

This air bag assembly is either up or down.  It doesn't flex to any intermediate angles.  We had no need to show more than these two postions, so we chose to write an iLogic rule that would modify the parameters of the rubber bag feature, so that it is either inflated or "squished".  If you need it to be able to take any shape through a range of angles, then our approach wouldn't work for you.  But if you just need to show two or three positions, I can post the bag model here.

*Expert Elite*
JDMather
Posts: 28,246
Registered: ‎04-20-2006
Message 10 of 12 (1,183 Views)

Re: Creating an Air Bag (suspension)

02-22-2013 01:19 PM in reply to: cwhetten

cwhetten wrote:

Something like this?

 

 I can post the bag model here.


Thing of beauty, work of art.
Please do attach the files.

Please mark this response as "Accept as Solution" if it answers your question.
-----------------------------------------------------------------------------------------
Autodesk Inventor 2015 Certified Professional
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Certified SolidWorks Professional
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