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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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best way to weld together two 1/4" lead sheets?
What's the best way to weld together two 1/4" lead sheets? I was going to try and use a blowtorch, but I'm worried about compromising the lead thickness of the seams, so I thought I would pose the question. Thanks in advance, John |
#2
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best way to weld together two 1/4" lead sheets?
On Jan 22, 5:20*pm, "John Asop" wrote:
What's the best way to weld together two 1/4" lead sheets? *I was going to try and use a blowtorch, but I'm worried about compromising the lead thickness of the seams, so I thought I would pose the question. Thanks in advance, John OxyFuel torch |
#3
Posted to rec.crafts.metalworking
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best way to weld together two 1/4" lead sheets?
On Jan 23, 9:20 am, "John Asop" wrote:
What's the best way to weld together two 1/4" lead sheets? I was going to try and use a blowtorch, but I'm worried about compromising the lead thickness of the seams, so I thought I would pose the question. Thanks in advance, John A blowtorch is just fine, preferably propane etc as the old pump up kerosine ones are dirty *******s. Use bar solder, use Stearine as a flux. Use a wiping pad made from an old felt hat (traditionally, rabbit fur) or failing that, a piece of motorcycle inner tube bent into a pad. Bevel the edges on the top sheet, wire brushing is adequate surface preparation. You should be able to get bar solder and a block of Stearine from your local plumbing supply shop. Andrew VK3BFA. |
#4
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best way to weld together two 1/4" lead sheets?
Actually, I was hoping to maybe epoxy the pieces together if it is possible.
What this is is part of a lead container made up of 1/4" lead. Someone decided at one point to cut out a square slice out of one of the sides. I still have the piece that was cut out and it is only small and doesn't weigh much. With this cut out of the side, the container is pretty much useless and I first thought about welding it back in. I didn't want to use solder as the container is 100% pure lead and I want to keep it hat way. I don't feel good about heating it for fear of melting away the area where I want to weld in the cut piece. Unfortunately, the lead is in a state of decay (MUCH oxidation all over the box), so I have been trying to handle it as little as possible and plan to place it inside 2-3 mil plastic bags once I have the piece back in place. I will still be able to use the box in the bags. I have used 2 part store bought epoxies on other types of metals with pretty good success in the past and wondered, if I lapped over the joints and applied epoxy between them, would the mend hold? If epoxies can work, which would be the best? Thanks in advance and thanks for the initial reply. John wrote in message ... On Jan 23, 9:20 am, "John Asop" wrote: What's the best way to weld together two 1/4" lead sheets? I was going to try and use a blowtorch, but I'm worried about compromising the lead thickness of the seams, so I thought I would pose the question. Thanks in advance, John A blowtorch is just fine, preferably propane etc as the old pump up kerosine ones are dirty *******s. Use bar solder, use Stearine as a flux. Use a wiping pad made from an old felt hat (traditionally, rabbit fur) or failing that, a piece of motorcycle inner tube bent into a pad. Bevel the edges on the top sheet, wire brushing is adequate surface preparation. You should be able to get bar solder and a block of Stearine from your local plumbing supply shop. Andrew VK3BFA. |
#5
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best way to weld together two 1/4" lead sheets?
"John Asop" wrote in message ... Actually, I was hoping to maybe epoxy the pieces together if it is possible. What this is is part of a lead container made up of 1/4" lead. Someone decided at one point to cut out a square slice out of one of the sides. I still have the piece that was cut out and it is only small and doesn't weigh much. With this cut out of the side, the container is pretty much useless and I first thought about welding it back in. I didn't want to use solder as the container is 100% pure lead and I want to keep it hat way. I don't feel good about heating it for fear of melting away the area where I want to weld in the cut piece. Unfortunately, the lead is in a state of decay (MUCH oxidation all over the box), so I have been trying to handle it as little as possible and plan to place it inside 2-3 mil plastic bags once I have the piece back in place. I will still be able to use the box in the bags. I have used 2 part store bought epoxies on other types of metals with pretty good success in the past and wondered, if I lapped over the joints and applied epoxy between them, would the mend hold? If epoxies can work, which would be the best? Thanks in advance and thanks for the initial reply. John It's pretty hard to predict what will "hold," but epoxies (like most adhesives) don't do well on metals that develop weakly attached oxide layers, and lead is one of those. Does the patch have to resist a force, or does it just have to hang there without falling out? If it's the latter, your two-part store-bought epoxy should do as well as anything. If it's the former, it gets more interesting. -- Ed Huntress |
#6
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best way to weld together two 1/4" lead sheets?
I would expect that the epoxies are much stiffer than the lead. The lead
will bend slightly with handling, you will break the epoxy bonds. John Asop wrote: Actually, I was hoping to maybe epoxy the pieces together if it is possible. What this is is part of a lead container made up of 1/4" lead. Someone decided at one point to cut out a square slice out of one of the sides. I still have the piece that was cut out and it is only small and doesn't weigh much. With this cut out of the side, the container is pretty much useless and I first thought about welding it back in. I didn't want to use solder as the container is 100% pure lead and I want to keep it hat way. I don't feel good about heating it for fear of melting away the area where I want to weld in the cut piece. Unfortunately, the lead is in a state of decay (MUCH oxidation all over the box), so I have been trying to handle it as little as possible and plan to place it inside 2-3 mil plastic bags once I have the piece back in place. I will still be able to use the box in the bags. I have used 2 part store bought epoxies on other types of metals with pretty good success in the past and wondered, if I lapped over the joints and applied epoxy between them, would the mend hold? If epoxies can work, which would be the best? Thanks in advance and thanks for the initial reply. John wrote in message ... On Jan 23, 9:20 am, "John Asop" wrote: What's the best way to weld together two 1/4" lead sheets? I was going to try and use a blowtorch, but I'm worried about compromising the lead thickness of the seams, so I thought I would pose the question. Thanks in advance, John A blowtorch is just fine, preferably propane etc as the old pump up kerosine ones are dirty *******s. Use bar solder, use Stearine as a flux. Use a wiping pad made from an old felt hat (traditionally, rabbit fur) or failing that, a piece of motorcycle inner tube bent into a pad. Bevel the edges on the top sheet, wire brushing is adequate surface preparation. You should be able to get bar solder and a block of Stearine from your local plumbing supply shop. Andrew VK3BFA. |
#7
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best way to weld together two 1/4" lead sheets?
I would try to use a copper backing plate and a big soldering gun.
i On 2009-01-23, RoyJ wrote: I would expect that the epoxies are much stiffer than the lead. The lead will bend slightly with handling, you will break the epoxy bonds. John Asop wrote: Actually, I was hoping to maybe epoxy the pieces together if it is possible. What this is is part of a lead container made up of 1/4" lead. Someone decided at one point to cut out a square slice out of one of the sides. I still have the piece that was cut out and it is only small and doesn't weigh much. With this cut out of the side, the container is pretty much useless and I first thought about welding it back in. I didn't want to use solder as the container is 100% pure lead and I want to keep it hat way. I don't feel good about heating it for fear of melting away the area where I want to weld in the cut piece. Unfortunately, the lead is in a state of decay (MUCH oxidation all over the box), so I have been trying to handle it as little as possible and plan to place it inside 2-3 mil plastic bags once I have the piece back in place. I will still be able to use the box in the bags. I have used 2 part store bought epoxies on other types of metals with pretty good success in the past and wondered, if I lapped over the joints and applied epoxy between them, would the mend hold? If epoxies can work, which would be the best? Thanks in advance and thanks for the initial reply. John wrote in message ... On Jan 23, 9:20 am, "John Asop" wrote: What's the best way to weld together two 1/4" lead sheets? I was going to try and use a blowtorch, but I'm worried about compromising the lead thickness of the seams, so I thought I would pose the question. Thanks in advance, John A blowtorch is just fine, preferably propane etc as the old pump up kerosine ones are dirty *******s. Use bar solder, use Stearine as a flux. Use a wiping pad made from an old felt hat (traditionally, rabbit fur) or failing that, a piece of motorcycle inner tube bent into a pad. Bevel the edges on the top sheet, wire brushing is adequate surface preparation. You should be able to get bar solder and a block of Stearine from your local plumbing supply shop. Andrew VK3BFA. -- Due to extreme spam originating from Google Groups, and their inattention to spammers, I and many others block all articles originating from Google Groups. If you want your postings to be seen by more readers you will need to find a different means of posting on Usenet. http://improve-usenet.org/ |
#8
Posted to rec.crafts.metalworking
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best way to weld together two 1/4" lead sheets?
On 2009-01-23, Ignoramus31576 wrote:
I would try to use a copper backing plate and a big soldering gun. And I would turn the box so that the backing plate is horizontal, below the lead. i i On 2009-01-23, RoyJ wrote: I would expect that the epoxies are much stiffer than the lead. The lead will bend slightly with handling, you will break the epoxy bonds. John Asop wrote: Actually, I was hoping to maybe epoxy the pieces together if it is possible. What this is is part of a lead container made up of 1/4" lead. Someone decided at one point to cut out a square slice out of one of the sides. I still have the piece that was cut out and it is only small and doesn't weigh much. With this cut out of the side, the container is pretty much useless and I first thought about welding it back in. I didn't want to use solder as the container is 100% pure lead and I want to keep it hat way. I don't feel good about heating it for fear of melting away the area where I want to weld in the cut piece. Unfortunately, the lead is in a state of decay (MUCH oxidation all over the box), so I have been trying to handle it as little as possible and plan to place it inside 2-3 mil plastic bags once I have the piece back in place. I will still be able to use the box in the bags. I have used 2 part store bought epoxies on other types of metals with pretty good success in the past and wondered, if I lapped over the joints and applied epoxy between them, would the mend hold? If epoxies can work, which would be the best? Thanks in advance and thanks for the initial reply. John wrote in message ... On Jan 23, 9:20 am, "John Asop" wrote: What's the best way to weld together two 1/4" lead sheets? I was going to try and use a blowtorch, but I'm worried about compromising the lead thickness of the seams, so I thought I would pose the question. Thanks in advance, John A blowtorch is just fine, preferably propane etc as the old pump up kerosine ones are dirty *******s. Use bar solder, use Stearine as a flux. Use a wiping pad made from an old felt hat (traditionally, rabbit fur) or failing that, a piece of motorcycle inner tube bent into a pad. Bevel the edges on the top sheet, wire brushing is adequate surface preparation. You should be able to get bar solder and a block of Stearine from your local plumbing supply shop. Andrew VK3BFA. -- Due to extreme spam originating from Google Groups, and their inattention to spammers, I and many others block all articles originating from Google Groups. If you want your postings to be seen by more readers you will need to find a different means of posting on Usenet. http://improve-usenet.org/ |
#9
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best way to weld together two 1/4" lead sheets?
Ignoramus31576 fired this volley
in news I would try to use a copper backing plate and a big soldering gun. Yeah... I'm surprised nobody just suggested cleaning and fluxing the lead, and fusion welding it with a big iron, or a very small torch running a reducing flame. Ig's right about having a heat-sink surface behind. You can always weld from both sides, but having a melt-through would be unfortunate. Make sure the surface of the lead is in intimate contact with the heatsink all along the joint. You can re-form the container wall after welding. Fusion welding is always a bit trickier than soldering, but not all that difficult. Set yourself up some ticket tests first, and get some proficiency at it before tackling the real job. LLoyd |
#10
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best way to weld together two 1/4" lead sheets?
On 2009-01-23, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:
Ignoramus31576 fired this volley in news I would try to use a copper backing plate and a big soldering gun. Yeah... I'm surprised nobody just suggested cleaning and fluxing the lead, and fusion welding it with a big iron, or a very small torch running a reducing flame. That's what I would do, I cannot imagine why it would not work. Of course, it should be done in a flat horizontal position, backing plate on the bottom, lead on top. Ig's right about having a heat-sink surface behind. You can always weld from both sides, but having a melt-through would be unfortunate. Make sure the surface of the lead is in intimate contact with the heatsink all along the joint. You can re-form the container wall after welding. The backing plate would address melt-through nicely. Fusion welding is always a bit trickier than soldering, but not all that difficult. Set yourself up some ticket tests first, and get some proficiency at it before tackling the real job. Lead is a nice material to work with, I cast a lot of it when I was a kid (probably not too healthy) -- Due to extreme spam originating from Google Groups, and their inattention to spammers, I and many others block all articles originating from Google Groups. If you want your postings to be seen by more readers you will need to find a different means of posting on Usenet. http://improve-usenet.org/ |
#11
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best way to weld together two 1/4" lead sheets?
on the other hand, lead may fuse with copper. Maybe aluminum will be
better. I would definitely experiment. i On 2009-01-23, Ignoramus31576 wrote: On 2009-01-23, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote: Ignoramus31576 fired this volley in news I would try to use a copper backing plate and a big soldering gun. Yeah... I'm surprised nobody just suggested cleaning and fluxing the lead, and fusion welding it with a big iron, or a very small torch running a reducing flame. That's what I would do, I cannot imagine why it would not work. Of course, it should be done in a flat horizontal position, backing plate on the bottom, lead on top. Ig's right about having a heat-sink surface behind. You can always weld from both sides, but having a melt-through would be unfortunate. Make sure the surface of the lead is in intimate contact with the heatsink all along the joint. You can re-form the container wall after welding. The backing plate would address melt-through nicely. Fusion welding is always a bit trickier than soldering, but not all that difficult. Set yourself up some ticket tests first, and get some proficiency at it before tackling the real job. Lead is a nice material to work with, I cast a lot of it when I was a kid (probably not too healthy) -- Due to extreme spam originating from Google Groups, and their inattention to spammers, I and many others block all articles originating from Google Groups. If you want your postings to be seen by more readers you will need to find a different means of posting on Usenet. http://improve-usenet.org/ |
#12
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best way to weld together two 1/4" lead sheets?
Ignoramus31576 fired this volley
in : on the other hand, lead may fuse with copper. Maybe aluminum will be better. I would definitely experiment. It will. But you're supposed to control the penetration to extend about 60% through the material. (yeah... that's the trick G) LLoyd |
#13
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best way to weld together two 1/4" lead sheets?
On Fri, 23 Jan 2009 10:57:22 -0600, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote: Ignoramus31576 fired this volley in : on the other hand, lead may fuse with copper. Maybe aluminum will be better. I would definitely experiment. It will. But you're supposed to control the penetration to extend about 60% through the material. (yeah... that's the trick G) LLoyd I'd back it with petrobond casting sand. That will mold to the shape of the object and it will prevent melt-thru without sucking heat out of the joint. Think of it as casting-in-place. There's also some ceramic jigging putty available from Eastwood that works well. |
#14
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best way to weld together two 1/4" lead sheets?
"John Asop" wrote:
What's the best way to weld together two 1/4" lead sheets? I was going to try and use a blowtorch, but I'm worried about compromising the lead thickness of the seams, so I thought I would pose the question. Well, a pan the right size, and an oven that could reach melting temp comes to mind. Rub pan with graphite to keep from sticking. You didn't mention if you were laminating or making a butt joint, or a tee joint. Wes |
#15
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best way to weld together two 1/4" lead sheets?
John Asop wrote:
Actually, I was hoping to maybe epoxy the pieces together if it is possible. What this is is part of a lead container made up of 1/4" lead. Someone decided at one point to cut out a square slice out of one of the sides. I still have the piece that was cut out and it is only small and doesn't weigh much. With this cut out of the side, the container is pretty much useless and I first thought about welding it back in. I didn't want to use solder as the container is 100% pure lead and I want to keep it hat way. I don't feel good about heating it for fear of melting away the area where I want to weld in the cut piece. Unfortunately, the lead is in a state of decay (MUCH oxidation all over the box), so I have been trying to handle it as little as possible and plan to place it inside 2-3 mil plastic bags once I have the piece back in place. I will still be able to use the box in the bags. I have used 2 part store bought epoxies on other types of metals with pretty good success in the past and wondered, if I lapped over the joints and applied epoxy between them, would the mend hold? If epoxies can work, which would be the best? Thanks in advance and thanks for the initial reply. John Back in the day when Telephone companies used lead jacketed cable they would cover the splices In lead. The procedures used was to slip a lead tube over the cable and then do the splice. Then they would use molten lead and a insulated glove to "wipe" the lead to make a transition between the cable and the covering lead tube. You can (I think) do something similar using a big Iron or liquid lead Bill K7NOM wrote in message ... On Jan 23, 9:20 am, "John Asop" wrote: What's the best way to weld together two 1/4" lead sheets? I was going to try and use a blowtorch, but I'm worried about compromising the lead thickness of the seams, so I thought I would pose the question. Thanks in advance, John A blowtorch is just fine, preferably propane etc as the old pump up kerosine ones are dirty *******s. Use bar solder, use Stearine as a flux. Use a wiping pad made from an old felt hat (traditionally, rabbit fur) or failing that, a piece of motorcycle inner tube bent into a pad. Bevel the edges on the top sheet, wire brushing is adequate surface preparation. You should be able to get bar solder and a block of Stearine from your local plumbing supply shop. Andrew VK3BFA. |
#16
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best way to weld together two 1/4" lead sheets?
Uh, I gotta ask. What are you using a lead container with 1/4" walls
for? Smuggling something, perhaps? Jeff On Thu, 22 Jan 2009 17:20:19 -0500, "John Asop" wrote: What's the best way to weld together two 1/4" lead sheets? I was going to try and use a blowtorch, but I'm worried about compromising the lead thickness of the seams, so I thought I would pose the question. Thanks in advance, John |
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