Hi there,

I am pretty sure you will laugh (or at least smile) about my question, but I struggle with this (for me not so easy) task to construct an y-joint with 3 pipes. I got it ok'ish, but I think there are still some problems. I tried it in different ways, but ended always with problems fitting all three parts together. I started with a circle, extruded it and copied it 3 times. I rotated the upper ones 15 degrees upwards from the horizental line, did a boolean merge and boolean union these two parts together. I did the same boolean operation with the lower pipe. All looks ok and the last thing was boolean all parts together and a shell operation.

Is there a better, or right way to do it?

Hi

Try this

1 - create a pipe
3 - cut the pipe with 2 pink edge
3 - create 3 copy with circular array

works fine

Chri

The only trick i see is make the fillet one by one after Union! :)

Position of the curve generator of one cylinder can be rotated but not sure that change something...

Thanks for your fast reply.
The solution from Chris does not work for me as the angles are not even.
And when I do a shell command after the fillets my model goes crazy :) So I ended up without fillet, but still got some problems with the shell command. I need a tube with 1 mm thickness. Or is there anothe way to get the thickness except the shell command?
Can I ignore these problems when I 3D print this model or is there any solution to fix it?

I'll suggest doing shell before doing the joint.
Check out the "Pipe" script, in lieu of shell?
Sweep ring of two circles, instead of shell?

- Brian

Chris's method seems OK, but use the top two tubes at 15 degrees.

The center point must be at the mutual midpoint.

About thickness nothing more simple!

As that was solid : kill the caps
Shell
et voilà :)


Hum hum the internal part is some curious at the cross must be another thing! :)

Hi Rebo

i dont understand what does not work for you
here a test with differents angles .

Chri

Cool colorised managment of tutorial!

Hi all.
There is such a way.

https://yadi.sk/d/o4WSigGj7A2d7A

HI

i have change files in 10104.7 post

an explanation with pink line method ( and red line ! )

Chri

Hi guys,
I think I got it now! Many thanks for the help, especially to Christian and Frenchy Pilou (and all others too). I appreciate this help very much, you guys are great !

Maybe another process ...not so evident! :)
- difficulty is the Shell & Fillets (External-Internal) don't work very well for the global object!

so...at the end that must be a solid! :)




The 3dm file
https://moiscript.weebly.com/uploads/3/9/3/8/3938813/y.3dm

Not so easy !

Chri

Indeed! :)

You have not made the internal fillets but seems they work also fine!

hi frency,

just a fyi

on the last video you show, of the interior fillet. it's going to a point. that's not realistic. no process would have a point there. it would have to be some other shape. preferably a smooth one, lol.

@Anthony

Sorry i don't know about what point do you speak ???

I have truncated 2 branches for more easy understand what is the internal Fillet
Before Fillet


After Fillet



After Fillet


Before Fillet

hi frency. the last pic. where all three fillets go to that point. i'm not sure that is realistic. i'm not an expert though. put points in fea cause stress concentrations. in real life parts fatigue failures. from a manufacturing point of view, i don't think it's possible to create a point or a straight edge for that matter. CAD takes a lot of liberties. not sure what the op is trying to do though. it's an esoteric thing. not sure if it's relevant here. but something to watch out for if you are building real things.

Say you are in Pipes better for have better flow no sharp singularity! :)
(water, wind, gaz, etc...)

It's for that i fillet the internal parts! :)
We are in 21 th century! ;)
Smooth is beautiful! :)

like this one

hey frency,

i don't have moi v4 yet. but i used the cad program i have. i built a similar model and it looks like that works out to be tangent. so it's probably fine. in the pics and videos it looked like it was sticking up. just a visual thing i guess.

In fact the Fillet (external, internal) are dependent of the thickness so it can take measures inside a range more or less possible...so more or less tangent...