As part of a professional project, I would like to have a rolled UPN beam manufactured. To make the 3D representation (under solidworks 2019), I didn't have any problems: 3D sketch → Unclosed circle → Welded construction → Choice of UPN and sketch. However, my supplier asks me for a unfolded view of this UPN. As it's not done in sheet metal work, I can't use the unfold function and the drawing doesn't offer me an unfolded view either.
I find it surprising that your supplier asks you for a developed for a UPN. In general, the person to calculate it is the one who knows the tools used for bending, so him. In addition, in general, there is overlength bent and SL straight planned and that is cut at the last moment. Unless you have holes or other special cutouts in your profile (given the tree structure on the image it seems not)
For the time being, yes there are holes in the final piece, which were made using a circular repetition and so on the foreground he only has angles to position them. With a radius of more than 700mm for this rolled part, I imagine that it is not easy to use angles to mark the holes. I made a quick representation of the shape to illustrate my question as the finished part is a big chassis with a lot of parts and information.
By using flexion, this should be possible. Draw the right U with the cutouts and then use the bending tool. (On the other hand, you would have to ask where the neutral fiber is for your type of profile, or the length of the profile.)
Or by drawing the U in sheet metal work perhaps too.
For my part, I find it strange that a boilermaker asks you for a developed length. For a boilermaker it is the ABC of the boilermaker, if he does not know how to calculate a development of this kind from the picture, he must stop his profession immediately.
Well here it's a circle (PI x d = perimeter) = Developed length of your part passing of course through the neutral fiber...
Indeed it's complicated in your case for the flattening ... Good luck. @+. AR
I don't find it blizzard because I've already had the case several times because of the piercings. I'll give you a little tutorial on how I do it because I'm under 2022 at work
Thank you very much for your answers! Since this is my first part in a very busy welded part, I don't think I have time to redraw/repair the whole part if I change the first step, but I'll do that next time!
For my current solution, I had my supplier on the phone and he told me that it is to have the center distances of the holes in order to be able to mark/start them before bending. He suggested that I add a rolled sheet metal (which I exclude from my welded parts nomenclature) and which I hide in a configuration called "final product". But it allows me to have a sheet that I can unfold that has the holes at the same centers as in the UPN. I placed this sheet as close to the theoretical neutral fiber as possible.
You noted the time to answer you and the quality of the answers. Come and see us regularly! Personally, I learn something every day and yet I'm not a partridge of the year.
Re-Hello, No ZOZO, I'm not angry, just that I find it a bit weird the request of Mr. Collins' supplier ... So for the record, I also made a 3d model with another profile, but which is only usable for this IPN80 profile (it will have to be redesigned to do with another profile), but the idea is there, Thank you m.collins... @+. AR Part1.SLDPRT (1.2 MB)
