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Can not bend part

Question asked by 1-AMI12S on Mar 5, 2008
Latest reply on May 16, 2008 by michael hermann

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Please see the attached part. I want my supplier to fold thin sheet in half (basically a full width hem) one direction and then put a right angle bend in it the other direction, creating a L bracket with effectively two layers and a bent edge. I can not figure out how to get solidworks to do this.

I can get the bracket if I remove the rounded over edge from one leg, but that is not what I want from my supplier (who will judiciously follow the print).

Please see the attachment for the post first bend flat part that I want to turn into a L bracket.

thanks
Greg

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Kelvin Lamport Mar 5, 2008 11:19 PM
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So you want a double thickness L shape?

Why not just extrude the finished shape? Or Create an L, then add a Hem and Edge Flange?
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Neal Rusy Mar 6, 2008 10:45 AM
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Is this kinda what you want?
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- can_not_make_bendNR.zip51.1 KB
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- Stephen Bittner @ Neal Rusy on Mar 6, 2008 10:51 AM
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  ^^^^^^^^
  
  Perfect solution.
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- Brian Cayer @ Neal Rusy on Mar 6, 2008 11:16 AM
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  Neal, Kudos.
  
  Regards,
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Gerald Davis Mar 6, 2008 12:43 PM
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Greg McFadden wrote:

... I can not figure out how to get solidworks to do this...

Greg -
Neal's solution is easier to edit - particularly for changing the material thickness & radii. The attached solution has a shorter feature list.
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- ElHemo.zip103.0 KB
- El_Hemo.jpg88.4 KB
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Kelvin Lamport Mar 6, 2008 1:12 PM
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Gerald,
That was my first choice also. The KISS method is often better as there is less to go wrong.
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Tim Turpin Mar 6, 2008 1:33 PM
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Greg,

Please see the attached example as it shows an 'L' bracket with hem on one leg.

Is this what you are trying ot accomplish?

Tim...
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- 1-AMI12S @ Tim Turpin on Mar 6, 2008 2:18 PM
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  Nothing here is quite what I am trying to get at.
  
  Please see the attached file, drawn as a solid, not sheet metal. I am trying to do that in sheet metal. I should note that I am still on 07, and can not open 08 files...
  
  thanks a lot folks.
  
  Greg
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  - Matt Lombard @ 1-AMI12S on Mar 6, 2008 2:26 PM
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    Greg,
    
    I had posted a response, and then I thought I misread your request and gave the wrong answer, so I deleted my post, but your model shows what I originally thought. So confused.
    
    You can't do this with SW sheetmetal. That's a bend over a bend.
    
    You can sweep the deep U with an L shape or you can use Flex to bend a U.
    
    Best of luck.
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  - Mauricio Martinez-Saez @ 1-AMI12S on Mar 9, 2008 11:31 PM
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    Greg,
    
    One question.... how you plan to physically fabricate that part? you can press brake bend the frist bend (folding in half) doing to operations, however the problem will be to bend the doble sheet metal plate in order to do the "L" since that will create some weird stress on the material along the zone of the first bend (depending on the thickness of the material it can even be impossible without deforming the entire macoy).
    
    I operate a press brake a log time ago... and never se something like that done (perhaps with a small gauge like 20 or 18 max, will work).
    
    Basically, SW, as many other CAD applications provide functionality to "replicate" fabrication processes... so when something can not be fabricated they do not provide the means to draw it...
    
    But I can be wrong.....
    
    Out of curiosity... why the double material?
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    - 1-AMI12S @ Mauricio Martinez-Saez on Mar 10, 2008 8:19 PM
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      it was going to be thin 20-24 gauge (or the decimal equivalent) dead soft copper, so nice and soft. You can do that if the bend is small enough in comparison to the part dimensions.
      
      thanks all
      Greg
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      - Brian Cayer @ 1-AMI12S on Mar 10, 2008 10:44 PM
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        As I look at this piece and ponder how I would keep all of the edges aligned as near as possible ( Assuming this was important enough) I can see the inside section before the first bend being a rectangle and the outside section ends being flared slightly away from the first bend to the outer corners. The stress of the outside second bend can't be avoided.
        If it were up to me I would fold the dollars this would cost and put them in my pocket.
        
        Difficult but possible yes?
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        Flair.JPG159.1 KB
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        Mauricio Martinez-Saez @ Brian Cayer on Mar 11, 2008 1:51 AM
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        Well... 20-24 gauge soft copper can be folded by hand.... The dificult part will be to calculate the flare required to keep the edges aligned...
        
        I will share with Brian the dollars...
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Brian Cayer Mar 11, 2008 10:05 PM
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M.G., Ok, it's a deal.
By the way I've been meaning to ask, When you cry does your nose run?
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- Stephen Bittner @ Brian Cayer on Mar 13, 2008 5:41 PM
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  LOL....that picture will give me nightmares tonight. Quite disturbing. :-)
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- Mauricio Martinez-Saez @ Brian Cayer on Mar 20, 2008 6:20 PM
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  Brian,
  
  For your information, the picture was taken just after we install a new version of SolidWorks and load one of our assemblies to work on actual production.... Any one working with SolidWorks for over 4 or 5 years should be able to do the same.
  
  By the way, We used to cry every time we install a new SW release... but now by now we can resist the pain....
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  - Neal Rusy @ Mauricio Martinez-Saez on Mar 20, 2008 6:58 PM
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    M.G
    Feel the same way after an install but with one exception I use my middle finger !
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Dean Williamson Mar 13, 2008 7:25 PM
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What is the problem with just using thicker metal and cut down on the total cost and form time of the creating the part. If I designed this part here where I work, they would request thicker metal and make one bend. I am confused why you want to a double bend.
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michael hermann May 16, 2008 9:57 AM
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Make an (sheet metal) L. Create a hem on each flange. THEN in the FLATPATTERN config: fill out the "hole" with a extruded boss.......nooooot?
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