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Ultimate tong failure


 Matt Marti

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My first experience with "ultimate" tongs was when I worked with Daniel Lea at the end of July. They are interesting to because they can easily hold curved, tapers, curved tapers and all sorts of other shapes because of there design. So lately I have been working on a pair of my own and it has been a challenge.
 
This pair I have been working on have did not work out due some over forging and jaw cutting issues. 
 
Things I would've done different
 
  • Start at the jaws not the reins.
  • Two sided taper from the arc to the Jaw.
  • Make sure I do not over forge the arc.
  • Take a bit more material for the v jaw.
  • Forge the v jaw a good bit thinner.
  • Get my cut in the v jaw correct from the get go. This is was a very frustrating part for me, if anyone has any suggestions on making it easier I have a open ear.
 
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Greetings Matt.

 

I have made several of this design....   Forge out enough material for the jaw...  do not finish until both parts match...   draw out the arch square to length do not finish round and keep straight  no arch....    forge the hinge with an off anvil step.... again at the reign end...  form round to match  ... start to draw out the reigns but do not complete....    Compare to match...   Now finish the jaw to fit your intended stock.   ... Round up the square arch stock on the anvil horn and form the arch to match...  Complete the reigns compare and punch for the rivet...    Boy its hard to explain a step by step without drawings...  I sure hope this helps...

 

Forge on and make beautiful things...

Jim

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Greetings Matt.

 

I have made several of this design....   Forge out enough material for the jaw...  do not finish until both parts match...   draw out the arch square to length do not finish round and keep straight  no arch....    forge the hinge with an off anvil step.... again at the reign end...  form round to match  ... start to draw out the reigns but do not complete....    Compare to match...   Now finish the jaw to fit your intended stock.   ... Round up the square arch stock on the anvil horn and form the arch to match...  Complete the reigns compare and punch for the rivet...    Boy its hard to explain a step by step without drawings...  I sure hope this helps...

 

Forge on and make beautiful things...

Jim

 

Thank you Jim. I will take this too account next go around! 

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I think you can still save those.

 

My first step would be to straighten the whole thing out.  Then using the near side edge of your anvil, I would do a half-hammer blow to set a shoulder with the face of the jaw pointed downward.  This will set up a nice shoulder to separate the boss from the jaw.

 

Step two would be to move to the far side edge and set another shoulder with a half-hammer blow, but this time make it with the face of the jaw pointing up to the ceiling.  

 

Steps one and two will isolate the boss area (where the rivet goes) and give you a better idea of where you need to move metal.

 

After that, I'd make step three all about shaping the jaws.

 

First thing I'd want to do would be to form a sharper bend right off of the boss area.  I'd start hammering it over the edge of the anvil, forming as much of a 90º bend as I could without thinning and flattening the stock too much.  Then I'd rotate the piece a quarter turn and make the cross section more rectangular rather than circular.  A cylinder is great for resisting bending from any direction, but tongs only have to resist along one plane.

 

After that's settled a bit, I'd bend the jaws around a mandrel (pipe or anything that will give me a solid radius).  At the vary least, I would make one jaw as perfectly curved as I wanted and then use it as a patter for the second, constantly checking and cold-bending a lot.

 

Only after that would I try to work with the jaws.  Mark Aspery has a great video on youtube that shows you how to move metal in an odd way.  He's making a scrolling wrench, but the technique would apply to what you're trying to accomplish with the split jaw.  

 

Of course, you could simply quit now, hang the tongs in an obvious spot and use them as a reminder on how not to do it.

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What's the appearance of a finished pair?

 

Sayings and Cornpone

From the days of Vaudeville.

"Hey, you're hair's getting thin."

 

"Who wants fat hair?"

 

 

https://lh3.googleusercontent.com/-UQZEGs7dqBk/TL-YItBMTLI/AAAAAAAAzsQ/WIJAmA7hVMY/w1063-h709-no/IMG_0468.JPG

 

https://lh5.googleusercontent.com/-uFobq97K94U/TL-YLhXAd4I/AAAAAAAAzsc/H8ZWWPlvjTs/w1063-h709-no/IMG_0469.JPG

 

Hopefully that is enough to get the idea. Thank you. :)

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Yes there is, Charles. The bulge of the hole is out of the way so I can set the angles and the lines easier, and like with my hammer tongs, which can get misaligned sometimes, it allows them to be realigned easier or adjusted with ease. This last approach with the "Habermann bends" makes this all a lot easier also as opposed to just the bends.

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IF people will look closely at your tongs Brian they may notice that you keep everything round until the last minute as you make the Habermann corner. Many of us that have made these without the pictures make the mistake of drawing out the pinchers as rectangles and end up with all sorts of catty-whompus shaped objects.

Just saying....but your pics show a good working story here.


Carry on

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  • 4 weeks later...

Just keep doing and you will  get good results. After more and more time failure it will suprise you when you suddenly  success.

Yes natkova, its taking me a couple of tries. Even tho I fail with those tries I learn with the failure..

 

Although its a bit disheartening to have your project fail multiple times because you are ignorant but you just have to keep on trying.

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