spout for a cup - loft? help!

[Greg_melbourne]

Hi Guys,

ok so maybe this is not a simple thing, I need to do a loft from a curved surface to a curved surface i think...

I'm trying to create a "simple" spout from a cup, but I've searched everywhere online and I can't find any pictures/tutorial or anything that
shows this is even possible in FreeCAD...

I've attached a cylinder with two surfaces to loft between... anyone know if this is possible?


Alternatively, anyone know how to make a simple curved spout?

Perhaps a top and bottom sweep profile alone 2 rails using the Curves addon workbench?

[chrisb]

Hi and welcome to the forum!

Normally you would create a Draft->FaceBinder and then add a Part->Loft. However, this crashes FreeCAD here, in master as well as in realthunder's branch.

OS: macOS 10.16
Word size of FreeCAD: 64-bit
Version: 0.20.25311 (Git)
Build type: Release
Branch: master
Hash: c5524bb58a7126fa2242d6137eb82ee9d54e82d4
Python version: 3.9.6
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.5.2
Locale: C/Default (C)

[thomas-neemann]

if that is a solution for you, i can make a video about it.

1.png (29.05 KiB) Viewed 1030 times

[papyblaise]

we saw him no later than 1 to 2 weeks

[Greg_melbourne]

hmmm yeap, thanks guys, all solutions i guess, but not quite what I wanted, because lets say the material is 1mm thin, like a stainless jug, it would be difficult to create a flowing/bent connection of the spout to the metal, it's be a shape angle connection, you'd then need to chamfer the sharp edge on the inside, but how do you do an add material chamfer on the outside (i.e. a weld) ... you really want a loft that can go from a curved surface to a curved surface along a path...


scratch that, I think the above ideas might work, you put in a larger chamfer on the outside of the spout/cup connection like this...

https://www.youtube.com/watch?v=oWTizlRcDnk

and then I'm guessing one on the inside... that might work, I'll try it tomorrow.

[papyblaise]

voilà , you can miss-miss the cat

[Greg_melbourne]

Ah yes ok that works, hugely laborious haha, but smooth curved surfaces, still ugly as all hell... but I'll post it up here for reference... lots of errors during production where it won't allow you to do lofts and cuts if it results in two solids... but works!

[drmacro]

... you to do lofts and cuts if it results in two solids...

But this specified behavior.

A Part Design workbench Body can only contain a single contiguous solid. All feature operations must result in a single solid. The Body is the cumulative result of all features under the body.

[papyblaise]

Miaou yes and I'm waiting for my milk miaou
in general, in bars, they are conical
and I do it without DatumPlan, and using the Pad face for the AddPipe
I gave it a profile a little less "eagle's beak"
Miaou

[Greg_melbourne]

drmacro, yes but for a beginner it's not clear why things are failing, and you're left scratching your head... just wish there was more descriptive error messages... but totally usable CAD software, I love it.