Ste1978 Posted April 2, 2014 Share Posted April 2, 2014 Hi, I am trying to model a Y-Branch piece of Duct in sheet metal. I can do this by drawing up a 280mm dia duct, then extruding/cutting a sketch across/through the tube to create the hole. However, I am interested in how other people create these, as I am not familiar with fabrication techniques, I would like to know the 'correct' way of creating a Y-Branch duct... I can create a flat pattern of my duct with the hole, but I do not think it's very practical for a plasma machine to cut this, I would like if someone with experience could upload a version? Quote Link to comment Share on other sites More sharing options...
JD Mather Posted April 2, 2014 Share Posted April 2, 2014 Extrude-Cut does not sound like a correct sheet metal operation. Attach your *.ipt file here. Quote Link to comment Share on other sites More sharing options...
Ste1978 Posted April 3, 2014 Author Share Posted April 3, 2014 Extrude-Cut does not sound like a correct sheet metal operation.Attach your *.ipt file here. Hi JD, I would but I cannot upload more than 500K and I need 1.15mb! Quote Link to comment Share on other sites More sharing options...
Ste1978 Posted April 3, 2014 Author Share Posted April 3, 2014 Hi JD, I would but I cannot upload more than 500K and I need 1.15mb! I have just attached the ipt and not the assy showing the other branch... TT4 BC48 280- 30 DEG Y-DUCTING - 001.ipt Quote Link to comment Share on other sites More sharing options...
JD Mather Posted April 3, 2014 Share Posted April 3, 2014 (edited) If you go to the Flat Pattern and then Wireframe view - you will see that you have not modeled the part correctly for sheet metal. Back in a bit. I usually name the surface body file something like Y-duct Master.ipt See attached example. Y Duct.zip Always check flat pattern in wireframe view to make sure there is not a double line for boundary of the flat. Edited April 3, 2014 by JD Mather Quote Link to comment Share on other sites More sharing options...
Ste1978 Posted April 3, 2014 Author Share Posted April 3, 2014 wow, I would never have through of using a surface revolution, thanks JD - It saves me fettling the lines out of the DXFs for sure! Quote Link to comment Share on other sites More sharing options...
JD Mather Posted April 3, 2014 Share Posted April 3, 2014 Some cutting machines don't like spline curves. There is a way to fix that from Inventor if that is a problem with your machine software. All sheet metal is - is a thickened surface. And by thickening a surface (when the standard sheet metal tools won't work, or are too much work) you ensure that the cut sides are perpendicular to the flat. Quote Link to comment Share on other sites More sharing options...
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