Fabrication of Duct Wye

digitalcarbon

anyone know how to do this?? cant seem to figure it out sketch wise

owen_sparks

This looks like something I'd make out of surfaces and then thicken into a solid, rather than a solid that is shelled to make hollow.

philip_thomas

Hmm, this may not be exactly what you're looking for, but the techniques should set you on the right path



https://cad.onshape.com/documents/f67f4b697c5917d6fbc047c4/w/d3cc384405b8862ec5ea5792/e/2d9d863d67cbc6444d7392cc

John_P_Desilets

Here is another approach you can try. 


https://cad.onshape.com/documents/c18a350d2c5911ebe7c078e4/w/b1b7b0b5da6c11ea77928d23/e/b433a303aa9edfa9d182184f

philip_thomas

^^^^ Nicely done Johhny D, i like yours better (more 'fabricatable' )

Prachi

try this one. Play with sketch 2 to see what happens at extremes.
Not sheet metal unfortunately.
https://cad.onshape.com/documents/78974d8ded40fe13fb220186/w/4e6d4158ec678af9e3829ab0/e/b153dc2efe1543b807b51b80

bruce_williams

@glen_dewsbury  Excellent!  Your approach to the loft is right on - going straight between the two diameters.  I played with this but did not see the construction you came up with.  And as you suggest interesting things happen at extents... cool how it keeps working.

romeograham

Here's a simpler stab at it that gets a little closer to the original image, starting from @John_P_Desilets 's model: https://cad.onshape.com/documents/378e8098ccc1cf6b306a19ba/w/b53dc223b00d128d8323118a/e/683fd9be6e5d3748bf527588

Adjusting the ellipse sketch can improve the character of the middle curve.