topic Re: Good practices in connecting cylinders in Fusion 360 in Fusion Design, Validate & Document Forum

Good practices in connecting cylinders in Fusion 360? Question.

Anonymous — Wed, 24 Oct 2018 12:39:57 GMT

Hi'ya,

I can't wrap my head around why Fusion isn't allowing me to loft two pipes which are at slight angles to each other.

In my example, I'm making a hollow pipe that I want to bend at a certain angle.

And this is what I get when I split the pipe, rotate it at the point of splitting and then join the two pipes.

I've read suggestions that you should start with the cylinders then loft, then shell out.

I cannot delete the hole running through the pipes, because if I do and then loft the two resulting cylinder faces, there is no way to recreate the hole with all the necessary bends.

I also tried the patch tool, but it only creates the outer and inner faces and doesn't fill in the missing part of the body, not even when I hit stitch.

Re: Good practices in connecting cylinders in Fusion 360

TrippyLighting — Wed, 24 Oct 2018 12:15:09 GMT

Can you share you model ?

Re: Good practices in connecting cylinders in Fusion 360

Anonymous — Wed, 24 Oct 2018 12:28:59 GMT

I've updated my post and put in the model.

Re: Good practices in connecting cylinders in Fusion 360

TrippyLighting — Wed, 24 Oct 2018 12:40:35 GMT

A general rule in modeling is to first create the big shapes and then move on to smaller details.

In this case you should have first created the tube in it's bent form and then add holes and cuts etc.

The problem is two fold:

1. You split the bodies and the rotated the tube around it's center point resulting in an overlap at the top and a gap at the bottom. IN order to address that yo'll have to trim off a littel more of each end so you have a clean gap between the two bodies. Then you can loft.

2. you cannot loft a hollow structure in one go.

You'll have to create two lofts and combine-cut the second, smaller one from the bigger one.

Re: Good practices in connecting cylinders in Fusion 360

Anonymous — Wed, 24 Oct 2018 13:08:46 GMT

Thank you for explaining.

I guess, instead of pipes I should have used cylinders. An inner and outer cylinder combined-cut with two lofts for each.

Funny thing is when I just remove the hollowing of the pipes in this given model, lofting at the splits works fine when I join the overlapping bodies.

...it's like using pipes but not using pipes ...

Re: Good practices in connecting cylinders in Fusion 360

TrippyLighting — Wed, 24 Oct 2018 13:55:52 GMT

Yes, you can certainly loft that wedge to fill that area but the geometry is not exactly nice 😉

Re: Good practices in connecting cylinders in Fusion 360

chrisplyler — Wed, 24 Oct 2018 14:00:49 GMT

Re: Good practices in connecting cylinders in Fusion 360

Anonymous — Wed, 13 Nov 2019 23:09:07 GMT

Hi,

Can any of you help me with connecting cylinders, I don't how to create those circles from chrisplyler's video? Also, I would really appreciate help with splitting one cylinder into two. I want to make a vein model with a branch, image attached.

Re: Good practices in connecting cylinders in Fusion 360

chrisplyler — Fri, 15 Nov 2019 14:53:33 GMT

@Anonymous wrote:
Hi,
Can any of you help me with connecting cylinders, I don't how to create those circles from chrisplyler's video? Also, I would really appreciate help with splitting one cylinder into two. I want to make a vein model with a branch, image attached.

What do you mean you don't know how to create those circles? You claim to have gone through the tutorials already. I don't think you have.

I like to help people who are trying, but come on man, help yourself a little bit first.