pdm
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 posted on 25/1/11 at 09:11 PM |
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Pad welding
Hi
Just got back from college as I've started a welding course.
They were trying to just get everyone going tonight so didn't go too much into technique, just let us practice so thought I'd asked for
advice on here ready for next week !!!
We're just pad welding in straight lines and then another adjacent line with a slight overlap.
My questions are:
1) Anyone got any tips for starting off smoothly - I seem to "jump" a bit when it arcs which is spoiling the first bit.
2) Any tips for finishing off - apparently the weld is meant to taper away - I experimented with moving the torch away, angles but whatever way I did
it I seem to either get a big globule of weld or a crater at the end?
Good fun though especially as how I didn't set myself or anything else on fire and I can still see !!!
cheers now
Paul
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owelly
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| posted on 25/1/11 at 09:19 PM |
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Start off the run the wrong way for a second then set off the right way running over your first bit. That way, the pool will form easier. At the end
of the run, keep the arc but pause the movement for a second to allow the pool to catch up.
You'll know it's right when the slag curls up after your run before pinging off and attaching itself to your hair with stinking burning
results. Then your lecturer will sell you a welders beanie......
http://www.ppcmag.co.uk
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pdm
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| posted on 25/1/11 at 09:24 PM |
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I'll give it a try - thanks
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MikeR
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| posted on 25/1/11 at 09:39 PM |
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Also - how are you holding the torch? Hopefully two handed with the second hand / arm resting on something - this then acts as a steady and makes your
welding start nicely and go where you want it.
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mangogrooveworkshop
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| posted on 25/1/11 at 10:22 PM |
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get a proper auto darkening bucket
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flibble
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| posted on 25/1/11 at 10:23 PM |
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quote:
get a proper auto darkening bucket
I'll second that as the best help my welding ever got!
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Andi
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| posted on 25/1/11 at 11:08 PM |
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I did the jumping out of my skin when the arc showed up thing, for about 2 sessions at college,
Much to the merriment of the tutor. It does go though.
I had always wanted to try welding, but after a couple of hours I knew I could never make a career out of it simply
because it is so **kin hot. But for little bodge jobs its great.
Andi
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Peteff
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| posted on 25/1/11 at 11:15 PM |
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Mig, tig or arc welding? Welding is such a vague term as it's just joining bits of metal together. I managed for about 40 years without the
luxury of an auto helmet, using two hands is and remembering to breathe normally is good. The auto helmet is an advantage as well though.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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pdm
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| posted on 26/1/11 at 08:28 AM |
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Yes sorry - should have said its MIG with Gas I am doing as they reckoned that would be the easiest to get decent results with.
I was going to see how it went before I invested in my own helmet but maybe I should be doing it the other way around. I'd be paranoid the
glass wouldn't go though !!!
As for hot - I was using two hands and one arm was sooo hot !!! And as we were just doing row after row, the metal is taking more and more heat it
does alter how the weld goes down.
Thanks everyone and any more comments more than welcome !!
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tony-devon
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| posted on 26/1/11 at 08:37 AM |
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well you just spotted one of the first important things, especially with MIG, preheating 
good gauntlets, and an auto dark helmet are very good items to get you started in the right direction
heavy is good, heavy is reliable, and if it breaks, hit them with it
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