design and prototyping

[mrmarkus]

Good morning to all, I am new to the forum so I apologize early if my discussion is in a wrong section.
I just started working with solidworks and I have zero experience in prototyping so I wanted to ask someone more experienced than me (and it takes little) some advice on the management of a model that I'm doing in solidworks.
I tell you briefly what this is about.

the project is very simple, I should make 2 plates of equal size one of which with a cylinder extruded in the center (diameter 20mm, extrusion 10mm)
the other 10mm thick plate should have a hole in its center so that the two plates can be coupled but not framed.
once the two models are made, I would like to send them to a workshop that works in cnc to be made of aluminum, now my question is:
Do I have to take into account scraps or tolerances in the construction of models? to be clearer, in the plate with the hole, for example, would I think to prepare a hole slightly larger than 20mm, but how much so that there is no excessive gap? or is this type of tolerance already prepared in the export of the file from solidworks?

thank you all for the advice and excuse for the banality of my question!

 

[meccanicamg]

I think the rules of design should not be forgotten.

if you provide a 2d design there will be tolerance. if you send a solid in prototyping will come what is nominal. I have never seen a program that reads in a person's mind to know if to do more or less wide... .

However if you make them aluminum... what prototyping is it?
Just make table 2d with tolerances.

 

[MassiVonWeizen]

Obviously an image or sketch would help.
at modeling level 3d exploits the geometries of the two parts for the dimensionalities.
to send in the workshop on behalf of third parties you have to interface with them and see how to manage the materials.
-if they do all they send finished drawings with tolerances and quotas and manage their material
- if they only provide the finished work you have to ask him that overmetal need for processing

the lasco between the materials depends on the geometry, tolerance and required processing.
to understand:
if the extruded cylinder is welded is one thing, if it is obtained from full is another;
if the positioning gives it any fixing holes is one thing, if they give it cylinder and hole is another;
If you make a 100 hole on a 10 thick plate is one thing, if you make a 20 hole on a 100 plate is another.

However in any case solidworks as software has nothing to do with the dimensional decision because it is information you decide as a designer

 

[mrmarkus]

thanks mechanicalmg I think the best thing is to interface with the workshop that will make the pieces

 

[mrmarkus]

thanks massivonweizen the extruded part is obtained from the full however rightly it will be better to interface with the workshop.