personal project selection

[Alex_M]

made the 3d you have practically also the 2d because the projections are extracted automatically by 3d, and being a parametric cad if you change something suits the views of the 2d is updated.

It is here that the speech comes out that certain things must be studied and cannot go to tentons. However I try to explain better the concept of tolerance.
tolerance has already been said to be an area of margin, dimensional or geometric, which is assigned to an entity. This tolerance declares how much I can afford to move from the ideal measure, we call it theoretical zero, because it has to be maintained the functionality of the entity in its context.
but this tolerance serves to ensure interchangeability with other equal entities; If I make a pin that must be assembled in wool or in belgium with a cylinder made in canada or in congo I must be sure that the assembly is always correct even if I have to rotate these components among them.
to do this, each component has a standard measure; knowing that the theoretical zero does not exist is assigned a tolerance. This is the concept at the base of tolerance.
Start reading somethingDismac. unipg.it/common_files/drawing/_8_dimensional tolerances.pdf
http://www.edutecnica.it/meccanica/tolleranze/tolleranze.htmhttp://www.federica.unina.it/ingegn...triale/tolleranze-dimensionali-parte-seconda/but if you are looking for the forum you will find it in bizzeffe of discussions that treat the topic

I forgot... Thanks to you too! You know how to explain the things that a kid would understand.

 

[MassiVonWeizen]

just to give you an idea of the complexity of calculating yourself the development of the sheet will mark this discussion on factor k, which is not the title of a carpenter film of the 1950s, https://www.cad3d.it/forum1/threads/fattore-k-sviluppo-lamiera.30206/

 

[Alex_M]

just to give you an idea of the complexity of calculating yourself the development of the sheet will mark this discussion on factor k, which is not the title of a carpenter film of the 1950s, https://www.cad3d.it/forum1/threads/fattore-k-sviluppo-lamiera.30206/

Hello Masses,
I apologize if I answer only now but this period is really challenging and unfortunately the time to devote to what for me is a hobby is a little discarded!

I read all the thread on the factor k... It is not really nonsense!
I could try to limit the folded parts but as far as the project is concerned it will not be exempt!

at this point, after reading more theories, doubts are:

- can I leave the project with "ideal" measures and ask the firm to calculate the fold, of course specifying material, thickness etc. or should I give them data and insert them into the project itself?

- as well as here we will have tolerances... I have to set them in the project phase and communicate them to the firm, both for the folds and the flat parts...right?

Thank you!

 

[Stan9411]

clearly in the tables that deliver impose tolerances on the corners of fold you want.. for personal experience, do not write robes as tenths of degree, because if you catch them on filthy days you get a nice vaff.... .
as some user has already explained, if you are not in the context of bending, you do much before entrusting to them for the calculation of the various factors.
then recapitulating: folded pieces boards, with fold sizes as you want them to be at the end +/- tolerance.
If he needs some extra indication, they'll ask you. no one is born learned and providing information is part of their work, if they keep us having your job, otherwise you ask others.

 

[Alex_M]

clearly in the tables that deliver impose tolerances on the corners of fold you want.. for personal experience, do not write robes as tenths of degree, because if you catch them on filthy days you get a nice vaff.... .
as some user has already explained, if you are not in the context of bending, you do much before entrusting to them for the calculation of the various factors.
then recapitulating: folded pieces boards, with fold sizes as you want them to be at the end +/- tolerance.
If he needs some extra indication, they'll ask you. no one is born learned and providing information is part of their work, if they keep us having your job, otherwise you ask others.

Thank you very much!
I'm slowly putting my hand on it, it seems to be going smoothly, but I'm at the very first weapons!
I keep you updated with the results!
Thank you so much for the moment!

 

[simone1996]

with inventor there is the possibility to make the table of the sheet with its development.
I don’t know if you’ll put carts or what, to me they have taught that it is very important to report the scale of the sheet development, only to not find your object large 2 times or small as an origami.
and the price would go accordingly.

 

[MassiVonWeizen]

with inventor there is the possibility to make the table of the sheet with its development.
I don’t know if you’ll put carts or what, to me they have taught that it is very important to report the scale of the sheet development, only to not find your object large 2 times or small as an origami.

if you export the dxf is of little importance to report the scale of representation, how much to verify that the export is made in scale 1:1. It's two different things.
in the design indicate the dimensions of encumbrance that are sufficient, for the supplier, to verify that the dfx is correct. plus the final size of the folded detail
It is not clear to me because, if the scale of development is not indicated in the drawing, these should be larger or smaller. who does the project with a cad 3d delivers to the supplier a pdf, a dxf and possibly a step or similar interchange format. a serious supplier will never and never recover a missing measure by measuring the design and recalculating it with the scale factor of the view.
therefore the important thing is to know how to use the program to make the correct export.

origami is an artistic form that does not have in its sense the indication of size.
Although usually the objects that are modeled are small can also be obtained with sheets of 40 cm on the side.

 

[simone1996]

I understand what you mean.
I speak for my direct and personal experience as, it has already happened that a dxf file (exported by inventor) with sheet development not in scale 1:1 quoted in all its dimensions is not executed correctly.
our lamierist takes the dxf removes all odds and unclosed lines and sends to the cut and makes the fold. then if you did not check the matching drawing quotas it is true that it was wrong, but I could avoid this error. to prevent the lamyerist from cutting a sheet not in scale to mark it above development and in the cart. our supplier provides to scale all design in real scale. then whether it is serious or not I do not know, I tell you the job does it and we work and we have not yet had complaints, you probably are right is not the best method, for us it works.

 

[MassiVonWeizen]

probably you're right is not the best method

I didn't say it wasn't a proper method. for you doing the job internally is enough.
I also develop internally, but when I expose the dxf I cover it on a clean template, I control a size and I pass it to what nesting does.
I don't know inventor, but I suppose the principle is the same for all 3d.
solidworks makes the design with a general scale which is the one that makes the dxf in scale 1:1; other views with different scale are resized with the relationship between their scale and the general one.
I make an example:
I have a design of a rectangle 200x50 with general drawing scale 1:5 and a 20x10 detail with scale 1:2. in the export all the views that have the scale of the drawing will be exported in scale 1:1 and have the rectangle 200x50 while the detail will be exported with a dimansion derived from the relationship between general scale and the detail (1:5/1:2=2.5) then I will find myself with a detail of 50x25. in this case indicate in the dxf the scale of detail is not necessary because there is no indication of the general scale to be related.
Maybe in the end they're just different methods of working and they're good both for each other.