Combining two bodies - Fusion 360

[Sebastien]

Hi,

 

I'm trying to create a protruding plate on my Tornado tank (the blue bit in the pic below):

 

 

I made a body (sketch, extrusion) that I moved in place.

And for reasons I can't fathom, I can't combine the two bodies in one.

 

Any idea?

 

TIA,

 

S.

[Bozothenutter]

Can you create a sketch surface on the surface of the tank?

The plate would then follow its contours.

[Sebastien]

10 minutes ago, Bozothenutter said:

Can you create a sketch surface on the surface of the tank?

The plate would then follow its contours.

 

No, you can only create a sketch on a flat surface.

[Bozothenutter]

22 minutes ago, Sebastien said:

 

No, you can only create a sketch on a flat surface.

'Project to surface' apparently...

https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Projecting-a-sketch-to-a-curved-cylinder-in-Fusion-360.html

[Brandy]

It doesn't look like the plate meets the tank. You can only combine objects that intersect.

 

Ian

[Sebastien]

51 minutes ago, Brandy said:

It doesn't look like the plate meets the tank. You can only combine objects that intersect.

 

Ian

 

Ian,

 

The plate does meet the tank.

 

S.

[Ebf2k]

What error message are you getting when you try to do the join?

Also, if you can't figure out why combining won't work, you can make a new sketch using the face of the object you moved into place, and extrude that.  Use the "To Body" extent type and the "Join" operation.

[Sebastien]

It says "Echec du calcul - Echec de la création de l'objet"

Compute Failed - Failed creating object.

I'll try the extrusion.

 

S.

[Sebastien]

It seems my rear revolution was deeply flawed.

I redid  the sketch and the revolution (and all the bits and bobs that go on it), and everythng was fine again.

 

[Ebf2k]

What was the problem with the revolve?  I have had a few times myself where some bodies just don't work but never figured out why.

[Sebastien]

18 minutes ago, Ebf2k said:

What was the problem with the revolve?  I have had a few times myself where some bodies just don't work but never figured out why.

TBH, I don't know.

I removed it and did it again, and then it was OK.

 

 

Sorry I can't help you on that topic...

 

S.

[Fritag]

I find that quite often tools such as loft/sweep/ thicken/fillet/shell/combine and even simple ones like mirror become temperamental as the bodies become more complicated.

 

Sometimes it’s straightforward operator error like having guide rails that don’t touch your profiles in a loft but often there doesn’t seem to be an identifiable reason.

 

Sometimes it seems completely arbitrary.  I’ve had failures with fillets on just one side of a seemingly perfectly symmetrical body and worked around it by cutting the body in half and mirroring the side that lets me do the fillet!

 

Usually there is a work-around - whether by slightly changing a profile to give more overlap, or changing the order of things or using a different tool or whatever.  Sometimes you can complete a loft or sweep as a new body when it won’t do it as a join.  It might let you combine the new body or it might not (but might let you later down the line).

 

The two invariably necessary tools seem to be patience and a sense of humour.