problem for calculation of volume

[gianlucax90]

hi guys,it's not really mechanical but you'll definitely know how to solve the problem.I'm struggling with the design of an acoustic case casing.I'd like to get a useful volume of 50 liters...it's not difficult when it comes to a simple parallelepiped and you can calculate also by hand but as you all know the cone of a case magnet etc occupy a very precise volume.there is a way to tell inventor to change a quota (lunghe
Thank you in advance, I hope to have been clear.

 

[Avoplus]

Three ideas pass through my mind...
1) to handle, by attempts.. .
2) by means of the parameter table (the cone volume formula will not be as easy as for the parallelepiped, however... )
3) with a macro (but, given the simplicity of the problem, I fear you would lose more time preparing the macro than to solve it to attempts :wink

 

[stefanobruno]

excel spreadsheet, with formulas that generate the desired quotas, with which to pilot inventor.

Bye.

 

[pagnotz]

I think you can do everything inside inventor with the parameters... when drawing the cone, in the height share insert the expression of the height itself according to the volume (which you fixed to 50 liters to be converted into cubic mm) and according to the cone radius (which will be a parameter of the piece, for example d1). in this way by varying the radius, the height of change keeping the same volume fixed.

 

[gianlucax90]

@ pagnotz: I think I have understood what you say but when you change for example the cone radius changes the height proportionally but the "useful volume" does not change in a parametric way, it decreases if the cone volume increases and increases if the cone volume decreases. . .
I think that a possible solution is a spreadsheet of excels that guides the quotas.

 

[pagnotz]

@ pagnotz: I think I have understood what you say but when you change for example the cone radius changes the height proportionally but the "useful volume" does not change in a parametric way, it decreases if the cone volume increases and increases if the cone volume decreases. . .
I think that a possible solution is a spreadsheet of excels that guides the quotas.

I think I didn't understand what you mean, the fact is that I didn't understand what this "usefulvolume" is and what bond has this parallelepiped with the cone...

 

[gianlucax90]

Then you realize to see the case of a subwoofer.... I need to bald the internal space , unused , I want it to be 50 liters... having the size of the case (cone tape) and the base area of the envelope (parallelepipedo).to do it by hand I already arrived but I wanted to understand if there was a casino way to make it on inventor...because when the more complex forms become.
for example calculate the internal volume of a bottle.
Thank you.