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M_Dyer
Posts: 1
Registered: ‎10-20-2011
Message 1 of 6 (586 Views)

How to model ACM sheet metal

586 Views, 5 Replies
10-20-2011 07:31 AM

Or Alpolic panels.  Very thin gauge aluminum sheets with a composite sandwiched between them.

 

The challenge is, the panels are relatively thick, 3mm or 4mm, but a router is used on the fold lines before bending to cut through all but the outer aluminum.  This makes for a very tight bend radius.

 

So, thick 3 layer material, tight bend with mitered corners.  Can Inventor's sheet metal tools handle this?  Or does anyone have tips for modeling this in Inventor?

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JDMather
Posts: 26,287
Registered: ‎04-20-2006
Message 2 of 6 (584 Views)

Re: How to model ACM sheet metal

10-20-2011 07:35 AM in reply to: M_Dyer

Do you really need the detail of the center material - or can simple color band for the composite work?
You might be able to use some sheet metal functionality, but probably Bend Part.

Are you looking for Inventor to calculate the flat pattern for you?
Do you need the flat pattern?
Or do you only need the finished folded form?

 

Any pictures of a finished part?

Example ipt files that you have already attempted?

Please mark this response as "Accept as Solution" if it answers your question.
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spoine
Posts: 43
Registered: ‎10-05-2008
Message 3 of 6 (485 Views)

Re: How to model ACM sheet metal

12-31-2012 07:04 PM in reply to: M_Dyer

Hi

 

I would like to add some more information regarding what M_Dyer has asked, as I too would like to be able to create these ACM flat patterns in Inventor.

 

The reason being is that when I need to create a complex panel that has different angles, mitered corners etc I have been drawing up a 3D model of the final folded panel and then taking every single measurement from that model and drawing out a flat pattern. Once this has been drawn up I then print out the drawing, cut it out, fold it up and tape it together to see if it actualy works. Very time consuming.

 

This flat pattern once correct, is drawn up, saved as a dxf and then sent of to the router to be cut.

 

Now what M_Dyer was saying about "thick 3 layer material, tight bend" is that the material is 4mm thick but the bend allowance is between 0.5mm & 0.8mm as seen in the attached jpg.

This is something that I havnt been able to do in Inventor.

 

The jpg also shows the steps needed to create the panels that are done by the router. The 90 degree V groove is what is needed to be able to bend up the sides. The 49 dim is assigned as the bend line so when the sides are bent up we get an ovall width of 50mm.

 

Ive also attached a very basic folded up part showing how it looks when complete.

 

So if there is a way to create these flat patterns in Inventor, it would save alot of time.

 

Cheers

 

 

 

Spoine
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blair
Posts: 3,947
Registered: ‎11-13-2006
Message 4 of 6 (462 Views)

Re: How to model ACM sheet metal

01-01-2013 09:45 AM in reply to: spoine

You should be able to adjust the K-factor value within the Inventor Sheet-Metal to get the correct bend allowance. You would need to use a couple of test strips and work backwards to calculate the correct K-factor. The attached spread sheet should help you in the calculation to get the correct flat pattern.

 

Your Inventor model won't have the router cut in it but I think from reading your post, all you really want is the correct flat pattern.

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Allen_Hart
Posts: 49
Registered: ‎09-18-2006
Message 5 of 6 (448 Views)

Re: How to model ACM sheet metal

01-01-2013 12:24 PM in reply to: M_Dyer

We have used Inventor to model ACM and make accurate flat patterns for our router machine for many years now.

The trick: don't bother trying to model the full thickness - just work with the outer skin.  Treat it like thin gage sheet metal.  Use normal sheet metal commands and bend allowances.

The only downside we've found is that our drawings don't show full thickness in section views, but it's never been a problem for us. 

Allen

 

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JDMather
Posts: 26,287
Registered: ‎04-20-2006
Message 6 of 6 (423 Views)

Re: How to model ACM sheet metal

01-02-2013 04:09 AM in reply to: Allen_Hart

Allen_Hart wrote:

 

The only downside we've found is that our drawings don't show full thickness in section views, but it's never been a problem for us. 

Allen

 


You could always edit the drawings manually (AutoCAD style) once the views are created.

Please mark this response as "Accept as Solution" if it answers your question.
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