Attempting to "un-weld" something

Tue, 31 Aug 2021 16:55:13 GMT

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Hello folks.  A modest handy man here.  No welding experience whatsoever.  Have come upon a family "hand me down."  And it is out of the ordinary.  Back in the late 1920's or even 1930's our Uncle Arthur welded a lamp togeather.  It is made up of large (2 inches accross) coins.  Yes he marched to the beat of a different drum.   Well, as it turn out, some of these coins might have some value to them.  It has been suggested (but not confirmed) that these coins might have been "brazened" in the being welded.  I don't have a clue.  What I can say, is that whatever methos he used.....these coins are welded solid.   The major problem is ....where he welded, the weld has covered the date that the coin (about half of the coins) was minted.Any help as to how to "undo" the 75 year old welding (I hate to do any damage to this lamp....because he did one heck of a job) so that I can determine the year of these coins?
Reply:A picture would help...However, I would bet you (without looking) that their are brazed or soldered...if it's soldered, you can separate them by using a propane torch.  I have occasionally separated brazed parts by a similar method, just with a oxy/ace torch, however, I wasn't worried about my stuff the same way you are, so I wouldn't try that without some addional input from others with a lot more experience in this area.If they are welded...the coins are damaged, along with their value (outside of the metal they contain).Smithboy...if it ain't broke, you ain't tryin'.
Reply:i woudl be careful with whatever you decide to do. the coins may be of a soft, low-melting-point metal. it's doubtful, considering that they are still intact from the original fastening, but it may still be a little risky. is the "welding material" soft? what color is it? what color are the coins? it may be possible, if the coins are hard and the connecting material is soft, to pry them apart using a chisel. it may damage one or 2 coins when you do this, but it may be worth it.just my thoughts.later,Andy
Reply:I guess the answer I need to sort out is: did welding exist alone in the late 20, early 30's ....or what year did sodering begin?
Reply:The coins are a cooper tone of sorts.   The metal used to fuse them looks kind of like a grey matter.
Reply:The dating of the metal work just got younger.  I found a coin within the lamp minted 1941.   So, it looks like the lamp was "welded" in the early 40's.
Reply:Welding existed.  We've had welding for quite a while now.http://inventors.about.com/library/i.../blwelding.htmSmithboy...if it ain't broke, you ain't tryin'.
Reply:my guess (due to colors) is that the metal was soldered. it's much easier to do in a configuration that you are talking about. stack the coins, heat the @#$%^ out of them and let the solder flow. the problem you may have is the solder may have gotten in between the coins, making a pretty solid connection. try heating the stack with a torch (propane, not O/A), and see if you can get the silver metal to start to turn shiney. try scraping it with a clothes ahnger, or similar material to see if it is liquid form. if it turns liquid within a minute or so, it's solder, and can be removed via a de-soldering pump, or de-soldering wick, both are sold at radio shack. the way i woudl do it... heat the stack, and knock it over. the coins will fall apart if the silver material is solder and is in liquid form.later,Andy
Reply:Thanks, as time allows (maybe later today) I will post a pic of the lamp.  The coins are not stacked.  They are connected end to end.  Whatever the material is that was used (solder or weld) is very durable and is able to literally stand the coins up with their strength.
Reply:As to the value of the soldered/welded/brazed coins, it has been -greatly- diminished due to the welding/soldering/brazing.Before taking more time/money/effort in your disassembly quest, talk to some coin collectors or coin dealers and see how much the condition of the coins changes the market value of the coins.
Reply:Good advise.  Because of the positioning of some of the weld material...the dates are covered on maybe 40 percent (approx. 35 coins) of the coins.   I might try to see if we have a expert propane user in this area to strip away some of the old welding and just expose the date.Not to get anyone salivatating.....there is a $20,000 Australian coin from 1930(only only 3000 were made)   That is the coin I'm after.  (Feel like Jaq Coustou.    not
Reply:If you got one worth 20 k you need to get to professional jeweler,don't tackle this yourself.Victor SuperRanger O/A                                         Solar migLincoln Powermig 140Southbend 9in lathe350# kohlswa anvilMiller Maxstar 150 stl etc....
Reply:Originally Posted by cdfyle...  Back in the late 1920's or even 1930's our Uncle Arthur welded a lamp togeather... ...Well, as it turn out, some of these coins might have some value to them...  ...Any help as to how to "undo" the 75 year old welding (I hate to do any damage to this lamp....because he did one heck of a job)...

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