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Elbows

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aramage

Post subject:Elbows

Posted: Feb 05, 2008 - 05:43 AM #7190

Joined: Aug 29, 2006
Posts: 12

I have a question about making elbows. In school, we were taught to make elbows with the turning machine, and then the flattening wheels to get the proper offset in making a spot-welded elbow.

However, in the shop our foreman insists on using the elbow-turning machine on part of the gore, and then tapping it together and spot-welding it. As far as I know, the elbow-turning machine is only used to make adjustable elbows -- not spot-welded ones. Has anybody heard of making an elbow this way. The other guys in the shop think this is a goofy way of making the elbows.

Thanks.
Andrew

sheetysteve

Post subject:ELBOW - JENNY

Posted: Feb 05, 2008 - 11:57 PM #7193

Joined: Jan 01, 2008
Posts: 24
Location: nz

We use a "jenny" hand turning tool. If you hold the elbow segment under the top wheel when turning you will set the metal out a bit (female). Holding the next joining segment above the top wheel will set the edge in (male). These slide together for spotting. Then a quick tap down with a hammer closes the seam.
In the old days we would use a double knock over seam for large elbows. A bit time consuming but boy they look good.

"Tread lightly" with the foreman...some hate change and are "grumpy" if you try and change things.
Can you make a seam up the way you were taught and then show the foreman. He might say "that's fine...do it that way if you want."
Or talk to him first if you think this is better. He may not know about doing it your way. Good luck.

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