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Post subject:Elbow Edge Lock Seams
 Posted: Mar 27, 2004 - 04:06 PM #490
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Power User
Joined: Feb 01, 2004
Posts: 820
Location: Mobile, Alabama
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What type of equipment is used to create an Elbow edge lock? I can lay out most any round work but, when it comes to assembling the individual parts of gores, I struggle. I generally spot weld the fittings but, I have never been satisfied with the end result. The most common fitting I deal with is the square to round. I use an acme or pipe lock to attach the main body of the fitting together. When it comes to the collar, its off to the spot welder.
I have tryed turning a 1/4" bead on the edge of the fittings. I have tried over lapping the beads and opposing them. If I am very carefull, the fitting looks and works well. I would like to find out other ways to do this job besides the spot welder. What is the process to accomplishing this?
I remember reading a section in "Kinks" where they show how to bend a lock with a profile of meshing beads that resemble an elbow lock in the brake. By cutting a 1/8" slot in the bottom rolls, the collar for say a sq. to rd. could be formed in the rolls. This seems like a good plan. How would you turn the opposing lock on the sq. to rd.? Doing this process in the flat state of the fitting seems unlikely. It seems that it must be done after the blank is formed. I have several old hand crank machines. One is set up for crimp and bead. Another is for turning 1/4's on radius parts. The other ones, don't have a clue. One of them has a stepped roll on the bottom shaft and a 3/16" bead roll on top. It would not surprise me if I already have the tools to do the job!
pricer  |
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Post subject:RE: Elbow Edge Lock Seams
Posted: Mar 27, 2004 - 05:12 PM #491
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Sounds like you have the tools..I also have several hand forming tools, I don't have a spot welder so I use a pop rivet, two in the collar keeps it from opening and falling off. I add 1/2 inch to the top of the Square to Round as the allowance, this gives you the necessary material for the forming operationa and asmall bit of material above the bead. The bead is automatically going to be at the same pitch as the fitting, this needs to be straightened out the accept the mating bead. I do this be hand with a mallet slightly around the fitting if the fitting is manageable then you can hold it on a slight angle and use the bench edge, if to large for this you can use any type of bar and a mallet. The circumference of the collar is important to a certin extent, if you're using a spot welder you can easily (if the fitting is not to large hold the collar around the fitting making sure the beads are in place and place a couple of spot welds. Once the collar is secured (I always place two pop rivets to secure the collar to the fitting) you can tap tighten the inside of the fitting with a mallet, to tighten the beads together.
Turning the collar is where everyone messes up...it takes at least three turns in the machine to turn out alright..many want to create the bead in one turn and depending on the circumference of the fitting it can distort the beading process. Another thing to watch is the acuracy of the round during the layout..what you see is waht you get, make sure your mark and cut is smooth through out...would this be something that we should spend more time on..Maybe I can put together a downloadable video for ShopPass?
Bud (I didn't login before posting) Sorry |
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Post subject:RE: Elbow Edge Lock Seams
Posted: Mar 27, 2004 - 06:55 PM #492
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Joined: Mar 17, 2004
Posts: 16
Location: USA Ga
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| Looks like the actual fitting was formed on the brake, which is how we form ours. For the joining process we use the tool that is behind the fitting in the picture, but we use a 1/4 allowance on both pieces of the fitting. As Bud stated, don't try to form the groove all at once, use light pressure and gradually tighten down. We only do 2 passes, then we spot weld 3 or 4 flat pieces of metal to ensure the fitting doesn't come apart. Some fittings will have drastic slopes and tend to run off the beading tool, it seems if once you start to turn the fitting keeping the round end as straight up and down as possible helps in forming. |
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Post subject:RE: Elbow Edge Lock Seams
Posted: Mar 27, 2004 - 07:15 PM #493
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Thank you for the photo. A video on this would be incredible. I know if I can see it done atleast once I would be able to get it done. If there are any cost just email me the bill, I'll be happy to pay!
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Post subject:RE: Elbow Edge Lock Seams
Posted: Mar 27, 2004 - 07:17 PM #494
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Power User
Joined: Feb 01, 2004
Posts: 820
Location: Mobile, Alabama
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Forgot to log in too! The last post was mine
Pricer |
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Post subject:RE: Elbow Edge Lock Seams
Posted: Mar 27, 2004 - 09:38 PM #496
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| I've never tried this, But do you think a spin-in type connection might work? Similair to the connections on an adjustable elbow. |
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Post subject:RE: Elbow Edge Lock Seams
Posted: Mar 28, 2004 - 12:23 AM #500
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Power User
Joined: Feb 01, 2004
Posts: 820
Location: Mobile, Alabama
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I think that would work, I just need to put it all together. Any suggestions?  |
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Post subject:RE: Elbow Edge Lock Seams
Posted: Apr 21, 2004 - 03:54 AM #702
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Joined: Apr 14, 2004
Posts: 1
Location: Carrollton MO 64633
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| What I have been looking for is some kind of help with forming an edge on round fittings. Someone has to have a manual or something showing how to use the forming rolls; a video would be great. I have been using a 1/8" turning roll on a 622 Roper Whitney turning tool. I have a sales CD from Empire Machinery & Tools LTD. It helps, but there should be more out there. |
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Post subject:RE: Elbow Edge Lock Seams
Posted: Apr 21, 2004 - 05:31 AM #703
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Power User
Joined: Feb 01, 2004
Posts: 820
Location: Mobile, Alabama
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acman wrote:
What I have been looking for is some kind of help with forming an edge on round fittings. Someone has to have a manual or something showing how to use the forming rolls; a video would be great. I have been using a 1/8" turning roll on a 622 Roper Whitney turning tool. I have a sales CD from Empire Machinery & Tools LTD. It helps, but there should be more out there. I agree 100% As much technology as there is today, the info should be avalible some where. I know if I were to see it once , I could get it! I would like to see some of your work, so i can learn. If you get the chance, post a picture or drawing describing the way you do it now. A picture is like saying a thousand words! Welcome! We are glad that you are here! Maybe we can convience Bud to make a short video or a photo tour of sorts. The tutorial with photos on bending a S-lock in the brake was exellent! It can be found in the members section, Have you been to shop pass .com? Check it out.
Thank You,, pricer |
_________________
Pricer
Many Minds, Many Hands, Many Solutions
The Curb Shop LLC
www.thecurbshop.com
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