[Ri...] Posted April 29, 2021 Share Posted April 29, 2021 Anyone have any fancy ways of measuring a folded piece of metal, and then calculating the unfolded length? Is it just a simple formula regarding length, and angle? Link to comment https://qualityforum.zeiss.com/topic/13016-folded-vs-unfolded-measurements/ Share on other sites More sharing options...
[Da...] Posted April 29, 2021 Share Posted April 29, 2021 Can you create a curve from a cross section and use the "curve distance" characteristic? I've never actually used this one, but I thought it might be a possibility. Link to comment https://qualityforum.zeiss.com/topic/13016-folded-vs-unfolded-measurements/#findComment-65892 Share on other sites More sharing options...
[Jo...] Posted April 29, 2021 Share Posted April 29, 2021 Please sign in to view this quote. If you are talking sheet metal. When you start calculation there are bend allowances(approximations) that take into account the alloy, bend radius, tooling clearances, and stretch of the material. Think of this as the midplane of the sheet. To extract the "flat" length you need to offset that polyline half the material thickness, because the material stretches on the outside of the bends. In practice the theoretical calculation would get revised to achieve desired result. Link to comment https://qualityforum.zeiss.com/topic/13016-folded-vs-unfolded-measurements/#findComment-65894 Share on other sites More sharing options...
[Ri...] Posted April 29, 2021 Author Share Posted April 29, 2021 The material is S355 MC based on EN 10149-2. I don't think it is sheet-metal. Link to comment https://qualityforum.zeiss.com/topic/13016-folded-vs-unfolded-measurements/#findComment-65896 Share on other sites More sharing options...
[An...] Posted April 30, 2021 Share Posted April 30, 2021 Please sign in to view this quote. The material 1.0976, also known as S355MC, belongs to the group of micro-alloyed steels! It is a hot-rolled steel Link to comment https://qualityforum.zeiss.com/topic/13016-folded-vs-unfolded-measurements/#findComment-65898 Share on other sites More sharing options...
[Ch...] Posted April 30, 2021 Share Posted April 30, 2021 Sounds like a job for AlphaFold. Link to comment https://qualityforum.zeiss.com/topic/13016-folded-vs-unfolded-measurements/#findComment-65900 Share on other sites More sharing options...
[Ri...] Posted April 30, 2021 Author Share Posted April 30, 2021 Please sign in to view this quote. 😮 😮 😮 I don't think I can afford that. Link to comment https://qualityforum.zeiss.com/topic/13016-folded-vs-unfolded-measurements/#findComment-65902 Share on other sites More sharing options...
[Jo...] Posted April 30, 2021 Share Posted April 30, 2021 Richard, can you profile both sides and get the avg length ? Link to comment https://qualityforum.zeiss.com/topic/13016-folded-vs-unfolded-measurements/#findComment-65904 Share on other sites More sharing options...
[Ri...] Posted April 30, 2021 Author Share Posted April 30, 2021 Please sign in to view this quote. I don't have the parts, and/or CAD models yet to test, but I'm thinking I'm going to attempt something with Curve. I also feel like I might be able to do this in GOM Inspect. I just need to do some testing. Link to comment https://qualityforum.zeiss.com/topic/13016-folded-vs-unfolded-measurements/#findComment-65906 Share on other sites More sharing options...
[Jo...] Posted April 30, 2021 Share Posted April 30, 2021 Please sign in to view this quote. I think you could scan the profile, extract each side, get curve lengths, and average the two. That should give you the midline length. Again, this is the current state of the material AFTER stretching. It will not provide you with "flat" pattern length before bending. Link to comment https://qualityforum.zeiss.com/topic/13016-folded-vs-unfolded-measurements/#findComment-65908 Share on other sites More sharing options...
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