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Hello,Recently I learned about the adverse effects of magnetism on TIG welding. The table I am using as a base currently is made of a ferrous material and has a some magnetism within causing me great problems. So, I am looking for a super cheap welding table option. The cheapest I've come up with is wooden frame holding some kind of patio tile or concrete slab. 2x4s and cinder blocks. I've imagined getting some kind of aluminum mesh or who knows but I have no idea how to make a setup that would be economical. Do you think concrete would fall apart against the heat of a weld? I can imagine that there would be an accelerated deterioration of concrete under intense heat but if one were to crumble it would be a cinch to replace.Any thoughts or input would be appreciated.ThanksMiller 330 a/bp water cooledI believe in gun control, I hold my gun with two hands. If you want to know why, click here.Buy American or bye America.
Reply:What problems are you talking about? Ive been welding on steel tables for years. Also on steel pipe stands.
Reply:They call it arc blow. The amount of effect magnetism has on the weld depends on several variables but there is no such thing as a welding style that is immune to magnetism as far as I know. Put a magnet in the middle of a piece that you are running a bead using a fairly low amp tig weld. You will see a pretty radical effect take place. If a magnet touches a piece of ferrous metal, it takes on some of the magnetic properties, the more the metal is exposed to a magnet, the more magnetism the metal gains.I wish I knew this a year ago.Miller 330 a/bp water cooledI believe in gun control, I hold my gun with two hands. If you want to know why, click here.Buy American or bye America.
Reply:pinjas,You just THINK you know what you know.This and your previous thread about problems you're having with your welding table make absolutely no sense.Welders have been tig/heli-arc welding on steel tables for a lot more than 40 years with no problems. (I say 40 years because that's my experience)It's also been my experience that when a guy doesn't have a clue what HE'S doing wrong, it's always easiest to blame the equipment.If you had a clue about welding in the first place you'd know it's unsafe to weld on a concete surface. Concrete contains moisture. When superheated (welding), it can explode right before your very eyes.You need to figure out what you're doing wrong before you throw the dishes out with the dishwater.Of course, if you're still convinced it's the table, you could hike on down to your local metal supplier and have him cut you a new tabletop out of 3/4" stainless steel.Syncro 250 DX Dynasty 200 DXMM 251 w/30A SG XMT 304 w/714 Feeder & Optima PulserHH187Dialarc 250 AC/DCHypertherm PM 1250Smith, Harris, Victor O/ASmith and Thermco Gas MixersAccess to a full fab shop with CNC Plasma, Water Jet, etc.
Reply:Originally Posted by pinjasThey call it arc blow. The amount of effect magnetism has on the weld depends on several variables but there is no such thing as a welding style that is immune to magnetism as far as I know. Put a magnet in the middle of a piece that you are running a bead using a fairly low amp tig weld. You will see a pretty radical effect take place. If a magnet touches a piece of ferrous metal, it takes on some of the magnetic properties, the more the metal is exposed to a magnet, the more magnetism the metal gains.I wish I knew this a year ago.
Reply:Originally Posted by pinjasHello,Recently I learned about the adverse effects of magnetism on TIG welding. The table I am using as a base currently is made of a ferrous material and has a some magnetism within causing me great problems. So, I am looking for a super cheap welding table option. The cheapest I've come up with is wooden frame holding some kind of patio tile or concrete slab. 2x4s and cinder blocks. I've imagined getting some kind of aluminum mesh or who knows but I have no idea how to make a setup that would be economical. Do you think concrete would fall apart against the heat of a weld? I can imagine that there would be an accelerated deterioration of concrete under intense heat but if one were to crumble it would be a cinch to replace.Any thoughts or input would be appreciated.Thanks
Reply:Try to keep your ground clamp as close to the area you are welding as possible. The further away from the weld, the better chance of "arc blow."Go hot, or go home!
Reply:Rust holds water. It is a desiccant. So when you heat rust it will out gas water vapor. That is less then desirable for welding on. Sincerely, William McCormick
Reply:*crawls back into the hole of ignorance he came out of*Thanks for setting me straight. I guess I will grab one of http://www.google.com/products/catal...CAcQ8wIwADgA#p these and use it as a clamp for holding together pieces or just a way to keep the ground as close as possible without melting the ground.Last edited by pinjas; 08-20-2010 at 11:59 PM.Miller 330 a/bp water cooledI believe in gun control, I hold my gun with two hands. If you want to know why, click here.Buy American or bye America.
Reply:Very nice ground clamp Pinjas. Thanks for the link; I am warming up the credit card as we speak!!!!And then, after so much work...... you have it in your hand, and you look over to your side...... and the runner has run off. Leaving you holding the prize, wondering when the runner will return.
Reply:Originally Posted by William McCormick JrWhen you weld steel on a steel table you can get some wild magnetic effects that will pull parts around. Or push them over. It can make them vibrate and even turn the part into a buzzer like mechanism, that sounds like an electric buzzer. Usually from a less then perfect ground connection. But nothing to keep you from welding the part. I just prefer aluminum.
Reply:http://img822.imageshack.us/g/img2176d.jpg/Miller 330 a/bp water cooledI believe in gun control, I hold my gun with two hands. If you want to know why, click here.Buy American or bye America.
Reply:Originally Posted by joedirt1966.................................................. ....This all reminds me of a fact that dates back to the Civil war. Did you know that ground clamps were actually clamped to a spike in the ground right after the Civil war? Thats how they got their name: Ground Clamps. There was so much spent ammunition in the soil after the Civil war that the ground actually provided a good ground for welding. I got this learnin from books!...............................
Reply:And all this time I thought it was Dennis Miller!! Or maybe Roger Miller!! MikeOl' Stonebreaker "Experience is the name everyone gives to their mistakes"Hobart G-213 portableMiller 175 migMiller thunderbolt ac/dc stick Victor O/A setupMakita chop saw
Reply:Originally Posted by pinjasHello,Recently I learned about the adverse effects of magnetism on TIG welding. The table I am using as a base currently is made of a ferrous material and has a some magnetism within causing me great problems. So, I am looking for a super cheap welding table option. The cheapest I've come up with is wooden frame holding some kind of patio tile or concrete slab. 2x4s and cinder blocks. I've imagined getting some kind of aluminum mesh or who knows but I have no idea how to make a setup that would be economical. Do you think concrete would fall apart against the heat of a weld? I can imagine that there would be an accelerated deterioration of concrete under intense heat but if one were to crumble it would be a cinch to replace.Any thoughts or input would be appreciated.Thanks
Reply:Originally Posted by Ed.Hi, you could always get a non magnetic stainless steel table top.
Reply:Hah, wow. That looks like a very nice boat, congratulations on catching your fish William. I hope to some day fabricate a nice big boat like that, or even something small, I love it out on any body of water. Do you know how to fillet a fish? I think it's an essential skill to have, especially if you enjoy fishing.I think that I am going to generally keep to welding off of any table. Basically I am going to keep things elevated and resting on thick pieces of aluminum angle. I love welding with aluminum angle that is this thick, it seems to make the welds better some how.Miller 330 a/bp water cooledI believe in gun control, I hold my gun with two hands. If you want to know why, click here.Buy American or bye America.
Reply:Oh Thanks. Yea I can filet a fish. I grew up on the water. And I used to spear flounder at night using high powered water white kerosene lanterns with giant white ceramic bonnets. You can actually just look down into the water. And after your mind is programmed for the refraction, you can just pluck them off the bottom. New guys just spear at mud. There is nothing you can tell them, until they get so frustrated that they will listen to what you are saying to them. Because the fish is not where the fish appears to be, and the spear in the water is not where the spear is. So you have to move the spear a little and look at it from the side, to see if the trajectory of the imaginary spear, will hit the illusion of a fish. Ha-ha. At least until you get used to it. Then you can just fill bushel sized stainless steel buckets with eels, flounder, and you can also net the crabs. At least back in my day. Today they are not even catching much flounder. I sharpen hunting knives and professional cooking knives for folk near me. So I can sharpen up a pretty good filet knife. I used to even filet snappers, baby blue fish, by the dozens. I grind the knife, then I harden the surface of the knife by polishing it with a linen wheel and rouge. It actually makes the surface so hard, that hardened drill steel cannot cut it. That is the secret to polishing, it makes the surface very hard. You can do it with leather or even cardboard if you can move the knife fast enough. An incident that stood out in my mind was a polished table I made that had to have holes drilled in it. I could not drill through the polished surface, even after I center punched it. I had to get a really large punch and destroy the surface, enough for a small bit to drill it. I had to make a pilot hole to go through with the larger bit.I drill hundreds of holes in stainless steel rails without oil or cutting compounds. I had to laugh a little. It was the finale high speed polish I gave it. It heat treated the surface. I would just look around for a hunk of aluminum and make a nice welding table. Welders that try ours say "holy shiiit" that is nice. Parts that would not normally electrically bond to a steel table make nice contact with the aluminum table. Plus you do not damage parts as much with an aluminum table. You can see if it is clean or dirty, it is always bright near the table, because it does not absorb light like a dark steel table. I also noted that a ¾" thick over hanging aluminum table top makes for a nice place to clamp things to. So although you can no longer tack steel down to it. You can easily clamp things to it. And it warps and bends less then a 3/8" steel table, I do tack things too. A big thick overhang is a very nice thing to have. Sincerely, William McCormick
Reply:The boat is the Captree Star III out of Captree State Park. It was a very nice boat. My younger brother builds boats down at his factory in Florida. I think he built a few barges and push boats for the oil spill clean up. I love going down there for vacation. I go to his plant and build things. That is my idea of a vacation. New bigger equipment, Ha-ha. I cut up giant cleats out of two inch thick solid steel rod. I love the automated band saw. The guys in the plant think I am insane for wasting my vacation. But I love building things. http://www.pushboats-barges.com/1901.htmlWe are a crazy family of working folk. You have to watch though when you build your boat, aluminum super structures are prone to almost immediate collapse in fire. They actually just melt away in minutes sometimes. Sincerely, William McCormickLast edited by William McCormick Jr; 08-23-2010 at 11:57 PM.Reason: I wrote "their" when I meant "there" |
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发表于 2021-9-1 00:28:28