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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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Overhead welding on a semi trailer
I have a "beavertail double drop deck semi trailer":
http://igor.chudov.com/tmp/Trailking/ that needs some work done on its very tail end: http://igor.chudov.com/tmp/Trailking...-0010.jpg.html Some of it would involve "Overhead" welding, operating from below the weld. What is the easiest way to do it correctly. These would be welds that need to hold up when a forklift or a metal tracked vehicle drives over that tail. We have solid mig wire and E71T flux cored. Thanks i |
#2
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Overhead welding on a semi trailer
On Wed, 25 Apr 2012 20:08:13 -0500, Ignoramus18965
wrote: I have a "beavertail double drop deck semi trailer": http://igor.chudov.com/tmp/Trailking/ that needs some work done on its very tail end: http://igor.chudov.com/tmp/Trailking...-0010.jpg.html Some of it would involve "Overhead" welding, operating from below the weld. What is the easiest way to do it correctly. These would be welds that need to hold up when a forklift or a metal tracked vehicle drives over that tail. We have solid mig wire and E71T flux cored. Thanks i Good luck, you'll need it. With my equipment and skills, I'd have to find a way to flip it over. If it already broke once, tacking a bit more weld on ain't gonna do it. Karl |
#3
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Overhead welding on a semi trailer
"Ignoramus18965" wrote in message
... I have a "beavertail double drop deck semi trailer": http://igor.chudov.com/tmp/Trailking/ that needs some work done on its very tail end: http://igor.chudov.com/tmp/Trailking...-0010.jpg.html Some of it would involve "Overhead" welding, operating from below the weld. What is the easiest way to do it correctly. These would be welds that need to hold up when a forklift or a metal tracked vehicle drives over that tail. We have solid mig wire and E71T flux cored. Proly should post to sejw. Don't know what the spatter situation is like for mig stuff, but if it's anything like stick, get leather headgear -- not too much is worse than slag in the ear.... except for mebbe slag in the eye. Slag in yer socks is no joke either. And a welding jacket, Overhead welding, at least for stick, requires a lot of practice. -- EA Thanks i |
#4
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Overhead welding on a semi trailer
On Wed, 25 Apr 2012 22:03:10 -0400, "Existential Angst"
wrote: "Ignoramus18965" wrote in message m... I have a "beavertail double drop deck semi trailer": http://igor.chudov.com/tmp/Trailking/ that needs some work done on its very tail end: http://igor.chudov.com/tmp/Trailking...-0010.jpg.html Some of it would involve "Overhead" welding, operating from below the weld. What is the easiest way to do it correctly. These would be welds that need to hold up when a forklift or a metal tracked vehicle drives over that tail. We have solid mig wire and E71T flux cored. Proly should post to sejw. Don't know what the spatter situation is like for mig stuff, but if it's anything like stick, get leather headgear -- not too much is worse than slag in the ear.... except for mebbe slag in the eye. Slag in yer socks is no joke either. And a welding jacket, Overhead welding, at least for stick, requires a lot of practice. Particularly on a scabby old trailer. Flip the sucker, or at least stand it on it's side, and sandblast the repair area. My preference would be to stick weld it, but that's just me. |
#5
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Overhead welding on a semi trailer
wrote in message
... On Wed, 25 Apr 2012 22:03:10 -0400, "Existential Angst" wrote: "Ignoramus18965" wrote in message om... I have a "beavertail double drop deck semi trailer": http://igor.chudov.com/tmp/Trailking/ that needs some work done on its very tail end: http://igor.chudov.com/tmp/Trailking...-0010.jpg.html Some of it would involve "Overhead" welding, operating from below the weld. What is the easiest way to do it correctly. These would be welds that need to hold up when a forklift or a metal tracked vehicle drives over that tail. We have solid mig wire and E71T flux cored. Proly should post to sejw. Don't know what the spatter situation is like for mig stuff, but if it's anything like stick, get leather headgear -- not too much is worse than slag in the ear.... except for mebbe slag in the eye. Slag in yer socks is no joke either. And a welding jacket, Overhead welding, at least for stick, requires a lot of practice. Particularly on a scabby old trailer. Flip the sucker, or at least stand it on it's side, and sandblast the repair area. My preference would be to stick weld it, but that's just me. Mebbe even easier/wiser to skip the welding and bolt mending plates made out of suitable angle iron, etc, if possible. -- EA |
#7
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Overhead welding on a semi trailer
Ignoramus18965 wrote:
On 2012-04-26, wrote: On Wed, 25 Apr 2012 22:03:10 -0400, "Existential Angst" wrote: "Ignoramus18965" wrote in message ... I have a "beavertail double drop deck semi trailer": http://igor.chudov.com/tmp/Trailking/ that needs some work done on its very tail end: http://igor.chudov.com/tmp/Trailking...-0010.jpg.html Some of it would involve "Overhead" welding, operating from below the weld. What is the easiest way to do it correctly. These would be welds that need to hold up when a forklift or a metal tracked vehicle drives over that tail. We have solid mig wire and E71T flux cored. Proly should post to sejw. Don't know what the spatter situation is like for mig stuff, but if it's anything like stick, get leather headgear -- not too much is worse than slag in the ear.... except for mebbe slag in the eye. Slag in yer socks is no joke either. And a welding jacket, Overhead welding, at least for stick, requires a lot of practice. Particularly on a scabby old trailer. Flip the sucker, or at least stand it on it's side, and sandblast the repair area. My preference would be to stick weld it, but that's just me. Yeah, just flip that 16,000 lbs sucker ... You can do it REAL easy. Two chains attached to the tail of your tractor and back to the trailer. Two more under the trailer in similar positions to keep it from sliding. Add two more to stop it when it gets on edge. Or if you have time two air/hyd. 20 ton jacks. Jack up, block in place. Block jack up and keep going 'til it's at a good angle. Call a wrecker outfit and have them lift it up. Block it in position. Blast and stick weld it then have them come back and drop it down. -- Steve W. |
#8
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Overhead welding on a semi trailer
Ignoramus18965 wrote: On 2012-04-26, wrote: On Wed, 25 Apr 2012 22:03:10 -0400, "Existential Angst" wrote: "Ignoramus18965" wrote in message om... I have a "beavertail double drop deck semi trailer": http://igor.chudov.com/tmp/Trailking/ that needs some work done on its very tail end: http://igor.chudov.com/tmp/Trailking...-0010.jpg.html Some of it would involve "Overhead" welding, operating from below the weld. What is the easiest way to do it correctly. These would be welds that need to hold up when a forklift or a metal tracked vehicle drives over that tail. We have solid mig wire and E71T flux cored. Proly should post to sejw. Don't know what the spatter situation is like for mig stuff, but if it's anything like stick, get leather headgear -- not too much is worse than slag in the ear.... except for mebbe slag in the eye. Slag in yer socks is no joke either. And a welding jacket, Overhead welding, at least for stick, requires a lot of practice. Particularly on a scabby old trailer. Flip the sucker, or at least stand it on it's side, and sandblast the repair area. My preference would be to stick weld it, but that's just me. Yeah, just flip that 16,000 lbs sucker ... Did you see the video of the tornado tossing semi trailers through the air in Dallas recently? 16,000#, and you only have to lift a side and let the weight mostly bear on the other side. Should be easy enough with a forklift and some care. |
#9
Posted to rec.crafts.metalworking
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Overhead welding on a semi trailer
On Wed, 25 Apr 2012 22:19:40 -0400, "Existential Angst"
wrote: wrote in message .. . On Wed, 25 Apr 2012 22:03:10 -0400, "Existential Angst" wrote: "Ignoramus18965" wrote in message news:MfednYn65algAgXSnZ2dnUVZ_t6dnZ2d@giganews. com... I have a "beavertail double drop deck semi trailer": http://igor.chudov.com/tmp/Trailking/ that needs some work done on its very tail end: http://igor.chudov.com/tmp/Trailking...-0010.jpg.html Some of it would involve "Overhead" welding, operating from below the weld. What is the easiest way to do it correctly. These would be welds that need to hold up when a forklift or a metal tracked vehicle drives over that tail. We have solid mig wire and E71T flux cored. Proly should post to sejw. Don't know what the spatter situation is like for mig stuff, but if it's anything like stick, get leather headgear -- not too much is worse than slag in the ear.... except for mebbe slag in the eye. Slag in yer socks is no joke either. And a welding jacket, Overhead welding, at least for stick, requires a lot of practice. Particularly on a scabby old trailer. Flip the sucker, or at least stand it on it's side, and sandblast the repair area. My preference would be to stick weld it, but that's just me. Mebbe even easier/wiser to skip the welding and bolt mending plates made out of suitable angle iron, etc, if possible. With reamed holes and precision fit bolts, perhaps. Or hot rivets, properly set. ANY movement will eventually cause the bolts to fail. |
#10
Posted to rec.crafts.metalworking
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Overhead welding on a semi trailer
"Ignoramus18965" wrote in message ... I have a "beavertail double drop deck semi trailer": http://igor.chudov.com/tmp/Trailking/ that needs some work done on its very tail end: http://igor.chudov.com/tmp/Trailking...-0010.jpg.html Some of it would involve "Overhead" welding, operating from below the weld. What is the easiest way to do it correctly. These would be welds that need to hold up when a forklift or a metal tracked vehicle drives over that tail. We have solid mig wire and E71T flux cored. Thanks i I would do it overhead with 7018. Even if you have to hire a guy for a couple of days. Test him first. Contrary to what you would think, I find when welding overhead, you have to INCREASE the wire speed. It keeps the blob from running back down the wire. Be wary of rust and corrosion that may be hidden. It's tricky. It's fun. Why don't you just do it? You're pretty good with 7018........... And don't forget those leathers. I still have scars from overhead. The night sweats are getting better, too ......... ;-) Steve |
#11
Posted to rec.crafts.metalworking
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Overhead welding on a semi trailer
On Wed, 25 Apr 2012 20:08:13 -0500, Ignoramus18965
wrote: Some of it would involve "Overhead" welding, operating from below the weld. What is the easiest way to do it correctly. These would be welds that need to hold up when a forklift or a metal tracked vehicle drives over that tail. We have solid mig wire and E71T flux cored. Thanks i Although, I can't see exactly what you are trying to weld from the pictures, I would recommend stick welding with 7018. Absolutely do not use solid MIG wire. The flux core is a much better choice if you must use a MIG set up. It is not necessary to tip your trailer over as others have suggested, but backing it over a garage pit would help to give you some working room. Joint preparation is key. You should grind a vee joint between the plates (asumming this is a butt weld) and absolutely clean it out of any paint, rust, or grinding debris using a knotted wire wheel. If you have no experience running a key-hole type root pass with say 6010, I'd recommend tacking a backing strip to the weld path. Usually a piece of cold rolled steel about 1/4" thick will do the trick. (Grind any mill scale off of it before you use it.) You can cut this off with careful application of an oxy-acetaline torch after the weld is completed. Then grind the remains flat and apply a capping bead over that side of the weld. The root pass is also key. You must keep a very short arc length with 7018 otherwise oxygen will contaminate the weld puddle. The goal is to lay passes that stack up evenly across the length of the weld. After the root pass you can use weaving passes to make this stack up.....once again remembering to keep a SHORT arc length. Before attempting to do this on your trailer, do TEST set ups and practice. Overhead takes practice above all else. Dave |
#12
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Overhead welding on a semi trailer
On Wed, 25 Apr 2012 21:24:12 -0500, Ignoramus18965
wrote: On 2012-04-26, wrote: On Wed, 25 Apr 2012 22:03:10 -0400, "Existential Angst" wrote: "Ignoramus18965" wrote in message news:MfednYn65algAgXSnZ2dnUVZ_t6dnZ2d@giganews. com... I have a "beavertail double drop deck semi trailer": http://igor.chudov.com/tmp/Trailking/ that needs some work done on its very tail end: http://igor.chudov.com/tmp/Trailking...-0010.jpg.html Some of it would involve "Overhead" welding, operating from below the weld. What is the easiest way to do it correctly. These would be welds that need to hold up when a forklift or a metal tracked vehicle drives over that tail. We have solid mig wire and E71T flux cored. Proly should post to sejw. Don't know what the spatter situation is like for mig stuff, but if it's anything like stick, get leather headgear -- not too much is worse than slag in the ear.... except for mebbe slag in the eye. Slag in yer socks is no joke either. And a welding jacket, Overhead welding, at least for stick, requires a lot of practice. Particularly on a scabby old trailer. Flip the sucker, or at least stand it on it's side, and sandblast the repair area. My preference would be to stick weld it, but that's just me. Yeah, just flip that 16,000 lbs sucker ... The easy way would be to go out and hire a welder :-) -- Cheers, John B. |
#13
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Overhead welding on a semi trailer
On Wed, 25 Apr 2012 21:24:12 -0500, Ignoramus18965
wrote: On 2012-04-26, wrote: On Wed, 25 Apr 2012 22:03:10 -0400, "Existential Angst" wrote: "Ignoramus18965" wrote in message news:MfednYn65algAgXSnZ2dnUVZ_t6dnZ2d@giganews. com... I have a "beavertail double drop deck semi trailer": http://igor.chudov.com/tmp/Trailking/ that needs some work done on its very tail end: http://igor.chudov.com/tmp/Trailking...-0010.jpg.html Some of it would involve "Overhead" welding, operating from below the weld. What is the easiest way to do it correctly. These would be welds that need to hold up when a forklift or a metal tracked vehicle drives over that tail. We have solid mig wire and E71T flux cored. Proly should post to sejw. Don't know what the spatter situation is like for mig stuff, but if it's anything like stick, get leather headgear -- not too much is worse than slag in the ear.... except for mebbe slag in the eye. Slag in yer socks is no joke either. And a welding jacket, Overhead welding, at least for stick, requires a lot of practice. Particularly on a scabby old trailer. Flip the sucker, or at least stand it on it's side, and sandblast the repair area. My preference would be to stick weld it, but that's just me. Yeah, just flip that 16,000 lbs sucker ... I see an 18-wheeler tow truck in Ig's future... http://www.fleetsaleswest.com/Used-H...national/1578/ -- Believe nothing. No matter where you read it, Or who said it, Even if I have said it, Unless it agrees with your own reason And your own common sense. -- Buddha |
#14
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Overhead welding on a semi trailer
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