Merging two surfaces that form the same shape at one end

[John_Doyle-Sims]

Hi everyone

I am creating a multicell horn for a speaker, who’s final destination is the 3d printer

the horn is made of two componants a ‘horn’ piece and a ‘throat’ piece

the throat piece connects a 1" driver at one end and 8 multicell componants at the other. I have been able to model the ‘inside’ surfaces of the throat piece, but surface offsetting them has proved difficult. I have tried creating a surface from the intersecting parts, then splitting both pieces and removing the excess, but the intersecting part is not plannar.

the throat piece is symetrical on two axi, so the object I am working on only connects to two of the ‘horn’ componants, but can be mirrored to make the final shape

I am having trouble merging the two solid polysurfaces into one.

any help would be much appreciated : )

Multicell Horn.3dm (9.4 MB)

regards,

john

[phcreates (peter harris)]

I’d separate the interior and the exterior and work on one at a time. Then, working with just the interior or just the exterior of those 2 tubes, I’d cut away a chunk of both tubes back near where they become a circle, and then boolean union them (which will work, if you cut enough away). Then I’d blendsrf that shape to the circle (or, more likely, I’d make a bunch of blendcrvs and then use sweep2 or something like that insead of blendsrf.)

Your outer tube shapes are a little messy at some of the corners - see image attached. You might want to create a planar srf on the ends of the interior shapes, extend that in all directions, then re-trim the outer tube shapes to that surface to make sure it’s all tight.