6 answers

• 
  Robert Stein over 1 year ago

  Well, in SW the file you attached is completely useless as far as editing goes. Ok. Here's an example how to create it and the result.
  Hope this helps.

  Added images

  

  Attachments

  how to cut and unfold.SLDPRT, 301 KB
  Download

  1. 
     Robert Stein over 1 year ago

     To get an oval shape, use multiple sketched bends. Prepare an additional drawing to calculate the line positions of the sketched bend and the required radii... More complex, but it will work just like the basic example.

  2. 
     Robert Stein over 1 year ago

     I attached the file. The dimensions you may not like, but the point is you can use the attached part file to go back step by step.

  3. 
     Mihkel over 1 year ago

     Now I looked deeper. The bend is a circle with a fixed radius, I have a oval which doesnt work for me, for some reason.

  4. 
     Mihkel over 1 year ago

     how is it possible :D

     I tried that.

• 
  Brian Jones about 1 year ago

  Here is a way to do this, using elliptical sketch. It's just roughed out.

  Cheers.

  Attachments

  How-to-flatten-it.SLDPRT, 2.34 MB
  Download

• 
  Mihkel over 1 year ago

  I asked. I will answer too.

  You can't make a sheet-metal part from oval sketch. It has to be a straight line or a circle - only then you can make it in sheet metal and flatten it.

  At least I didn't find any other way.

• 
  Robert Stein over 1 year ago

  Try with the attached file (part) SW2010 and try replicating the steps, let me know if you understand the procedure. There are other ways as well, this was the simpler way to explain.

  PS. For laser cutting, you will need to do an additional drawing and an additional cut that goes through the radial section under 90 degrees or to do the drawing on the unfolded sheet. Depends on what you want or need.

• 
  Cliff Behrend 10 months ago

  Brian has the correst solution for sheetmetal
  Using sheetmetal loft and normal cuts
  This part will flatten
  When doing loft increase # of bend lines for better display
  Good solution Brian

• 
  Paul Shebanow 6 months ago

  Look at software packages for the textile/garment/upholstery industry:
  www.exactflat.com (Inventor currently, Solidworks version forthcoming)
  www.optitex.com (standalone and pricey)

  This has a direct application to something I had to work on, which was developing cut patterns for Pontoon Boats.