Hello
After research and a lot of attempts, I get stuck on the unfolding of a sheet metal.
I attach the SLDPRT, it's a slide that I think is made up of 4 parts wrapped around a central axis.
The upper part unfolds very well. Does the problem come from the splitting of the body by abduction? Or directly from the way the sheet metal part is created by a transition fold?
Thanks in advance
Hello
1°) you can't do a flat for a screw that is more than 150° (the press depends on the pitch, etc.),
2°) in real life you will be forced to make your screw by section that you will weld end to end which does not correspond to your cutting which is 180° (material removal - Extru1 in your model.
3°) ditto for the border (your propeller/spiral 3)
You cannot work on the assembly but only on the part equal more or less to 150° depending on the pitch (our scalers will tell you how to do it), you must proceed as for an Archimedean screw.
(Source of the two images offered by the companion T on the Machining website)
That's how to do it in real life ;-)
Kind regards
Thank you for your answer!
I have tried a separation into smaller sections, but it poses the same problems, perhaps because of an illegal method?
I couldn't remove material according to the helix (either the geometry repetition is not suitable because of the taper of the part, or it creates disjoint bodies), so I went through the "combine" function, removing bosses (the part will be lighter).
Result: I have my trel bodies as much as I want, but it's the sheet metal function that gets stuck! The unfolded states all have the same name because of the primary sheet metal function.
Do I have to do separate kidnappings, creating plans? A little wild but why not.
Hello
In fact, you should not try to make an assembly in part mode (SLDPRT) but make an assembly from the N parts in sldprt.
I take this opportunity to suggest you for your border to look at the work done by our always excellent friend @ac cobra :-)
The problem is that it's not a simple linear repetition, the propeller is conical. But indeed, it is a solution that makes sense, less flexible than I could have imagined.
Hello
Not being able to open your file because I am under 2016 I am sending you an endless screw that I had done some TPS ago.
I made a removal of material in the assembly to make it conical. You will need to create propeller configurations and apply material removal to parts. Of course , you will have to adapt the ribs.
Hello, you have references of constraint related to the welded mechanic which does not unfold look at my part it is made alone without welded mechanic and it unfolds very well
Yes .-) ;-)
I saw that it was conical but that doesn't change the problem. You have to proceed section by section but if the fact that it is conical adds a little difficulty but nothing more.
Just make several files from your current file and remove material from the sections that you are not interested in. So each file represents a portion of your slide.
Kind regards
Hello
A little tutorial made some time ago:
https://www.lynkoa.com/contenu/r%C3%A9aliser-une-spire-pour-vis-darchim%C3%A8de-en-t%C3%B4lerie-0
For a conical screw the principle remains the same, either you make the 2 sketches directly with the conical shape, or you carry out a removal of material by revolution to make the conical shape.
Thank you very much for your answers.
@mmaheux: obviously that's not the problem, by removing the mechanically welded tube the problem remains exactly the same.
@ac Cobra: Can I record my piece in a previous version myself? Or do you want screens?
To explain a bit, we work more in a logic "one welded assembly" = "one part", so it would suit me to have everything in one part.
In the end, is it really a problem of 180° cutting?
I have the impression that if my unfolded states were independent it would be perfect, wouldn't it? The upper section unfolds very well, but unfortunately all the others unfolded affect the same body.
Thank you sbadenis,
I did a good job of making the shapes I wanted, but I'd like to have all my bodies in one room if possible. I don't understand why unfolded ones don't work.
Good evening
The simplest thing is for each body to be individual pieces that you put in an assembly.
Each piece will unfold and be used to make your cut-outs which I hope for you will be done by laser otherwise hello the tip to trace and the nibbler ;-)
Regards
PS: thanks to @sbadenis for the tutorial
Hello
As said, I know I can do it this way but I was hoping that there would be a method on a part because
1) the parts become much more difficult to modify if they are separated (if you want to change a radius you have to modify on each part, for example)
2) We have facilitated procedures for multibody parts.
I'm sure that among the SolidWorks cracks that you are, someone could tell me why unfolded ones don't work:)
Hello
As explained in one of my previous posts; To put it simply, you repeat the same spiral and you make configurations, then you replace them and remove material in the assembly to make it conical and you share the function with the parts.
I thank you for your help, but I don't think I can express my need.
I want to do everything in a single part file, as explained, but I'm stuck on the unfolded bodies of this part, not on other ways of doing it that would make me go through an assembly, even if your methods are very interesting.
I hope I don't sound harsh in this message, since I'm extremely grateful for giving me time to help me.
Good evening
You are not rude at all since we are discussing: but what you want to do is not a priori possible, simply you have to do as @ac cobra indicated and that is very good. There is the other way as I propose which is a little less elegant surely: but I do it this way because I have never used the configurations.
What I do know is that from the point of view of the material we are faced with an absolute physical impossibility to do this with flat sheet metal and solidworks only does what is physically computable and can be done in real life.
Just for fun, as the young people say, we should understand why you want a single piece. An assembly made with one or the other method seems to me to be unavoidable.
Communication between human beings is not easy sometimes ;-) ;-) hihhihi
Kind regards
I really don't think it's physically impossible. We are able to unfold certain sections, and I have already seen it made elsewhere.
But are we talking about the piece cut into sections?
As for my preference for a single part file, there is first of all the modularity aspect, having the fewest parameters to modify with each redesign, but also internal procedures, in terms of bills of materials and then laser cutting commands, which are much simpler if everything is saved in a part.
And to come back to my initial question, I just need to understand why some sections can unfold and others cannot:)
I tried the cobra method, unfortunately it seems that the assembly function fails to take into account the part configurations.
Yes, the part is cut into sections during the fab ;-)
I'll let @ac cobra or other experts say how to keep everything in a room.
I admit that what you want to do is beyond me. ;-)
I continue to look at what our eminent colleagues will offer you.
Kind regards
Hello
Not being able to open your file because of an earlier version of the software; could you put the STEP file so that I can have the dimensions and help you in the design of the worm screw in one piece.
@zozo_mp: I know that the FAB requires sections, I have never mentioned the fact of doing it in one block. :D
@ac cobra: here is the STEP file.
And a screen of my building tree, if you ever need it.
Thank you very much!
