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  #1  
Old 02-23-2011, 05:44 PM
mike39 mike39 is offline
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Default Square to round

OK, so I'm teaching myself layout. Went over to Sheet Metal World, found a tutorial on square to round, and did 'er up(first two pics). It went so well, I figured I'd try to make a square to round flat on one side, and that is where the problems begin. Not sure if I've drafted it correctly(see picture 3). And if I was to build it in two pieces, where would the division line be?
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Old 02-23-2011, 06:23 PM
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Quote:
Originally Posted by mike39 View Post
OK, so I'm teaching myself layout. Went over to Sheet Metal World, found a tutorial on square to round, and did 'er up(first two pics). It went so well, I figured I'd try to make a square to round flat on one side, and that is where the problems begin. Not sure if I've drafted it correctly(see picture 3). And if I was to build it in two pieces, where would the division line be?
Pic 3 is a little hard to see, but I get the idea.
Typically, the seam would be either north-south or east-west of the center of the round.
But, it's possible to have a seam on the corners.
Just a little more time spent on layout.
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Old 02-23-2011, 07:35 PM
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Here is a link with some printable worksheets in triangulation and square to rounds.

http://www.thesheetmetalshop.com/lib...ice_sheets.php

I believe the tutorial on sheet metal world was one I submitted to them years ago...in fact the only tutorials they have I believe are from TheSheetMetalShop
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Old 02-23-2011, 07:46 PM
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I don't know what happen to the images as they will not open? I'll test here an image.
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Old 02-23-2011, 07:54 PM
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I don't know what happen to the images as they will not open? I'll test here an image.

Yeah, yours opened. I was just about to ask if it was just me that couldn't open my pics.I had to turn them into avatars to attach them because they were too big; that probably has something to do with it. I may try again.
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Old 02-23-2011, 07:59 PM
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Here are two images... your one question is "where will I create a seam?

It really doesn't matter for the most part, but then again experience will be your best lesson as to how well it will layout and bend up.

Here are two images that can be split into two sections either way...larger fittings too can be developed in four separate sections, etc.
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rec_rd1b.gif   rec_rd1a.gif  
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Old 02-23-2011, 08:01 PM
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checking out for the night - we'll be back at it tomorrow and if you need another drawing - we can work on that too.
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Old 02-23-2011, 08:18 PM
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Default Second Try

Ok, we'll try this again, maybe the pic will open this time.
Just wondering if I am looking at this right. What I'm attempting is a 12"square to 7"round, flat on one side. The square to round on center turned out really good, so why won't this one? I'm thinking it must be drafted wrong.

In the meantime, i'll be working on Bud's worksheets.(thanks Bud!)
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Old 02-23-2011, 08:27 PM
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Thanks Bud. My seam question might be a little clearer now that the pic can be opened. Can I use my B-line to divide the fitting?(one piece would be B,C,D,C,B.....the other B,A,E,A,B)
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Old 02-24-2011, 02:30 AM
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Yes, you can use B line to separate into two. And the drawing looks correct.
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