The Sheet Metal Shop .Com

Sheet Metal Talk - Elbow Pattern

aramage - Aug 13, 2007 - 03:44 AM
Post subject: Elbow Pattern

We have a ton of elbow patterns in the shop where I work. On the pattern, there is a few different "v" notches on the bottom edge of the pattern. Someone once said that is for determining the throat radius of an elbow. Anybody know about this? How are they used?

Bud - Aug 13, 2007 - 12:24 PM
Post subject:

Could be, anyway to show us a picture of these patterns?

Elbow Patterns By Kidder on page 63 shows some notches, is this similar to what you're referring to?

http://www.thesheetmetalshop.com/pdf_ma ... Kidder.pdf

BobLuland - Aug 14, 2007 - 10:10 PM
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The notches are there because this is a pattern for a drop cheek elbow and this is were you would make your brake for the set down but I could be wrong. Like Bud said I got to see a pic. Don't forget the pop rivet at the begining. No blood letting. Bob

aramage - Aug 17, 2007 - 04:13 AM
Post subject:

Bud,

Here is the pic of the pattern. Notice, there are two notches on the lefthand side. This is for a 6" elbow, we have patterns all the way up to 60", and all the patterns have at least a couple of these notches.

Andrew

BobLuland - Aug 24, 2007 - 02:21 AM
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Thats is the weirdest looking 6" elbow pattern I've ever seen? That looks like a machine cover of some kind and I wasn't to far off. The notches appear to be an indicader for a drop cheek of sorts or true leanth. Bob

pahrump - Nov 03, 2007 - 02:40 AM
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Off subject, but I haven't seen that spangle in years !

rothalion - Nov 10, 2007 - 03:33 AM
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pahrump wrote:

Off subject, but I haven't seen that spangle in years !

Im a youngster compared to some of you an your so right...not in years!

Stickman - Nov 11, 2007 - 02:27 AM
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Geez, now I do feel old, I still have a sheet of that stuff that I am using for a cover sheet for my cold roll. Laughing

MattM - Nov 13, 2007 - 02:51 AM
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Wow, I have no idea what I'm looking at in that pic. Anyone have a pic of the finished product?

There are so many complex things people have done with sheet metal it makes my head spin.

fogcrawler - Apr 03, 2008 - 01:12 AM
Post subject:

I believe the pic shows the end of the gore, that angled cutout which is roundsd, looks like it's used to hang the pattern from a nail in the wall...
The v-notches he's asking about are where the seam of the gore would be...
Maybe they are rivet guides or perhaps swedging/crimping marks for assemblying each gore?