dern
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| posted on 16/1/05 at 05:33 PM |
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Welding advice please (again)
After my enforced christmas break I'm welding up my chassis again and I appear to have forgotten how to weld.
Some of my welds are lovely and some spit like b*ggery... I suspect I'm being a bit lax when it comes to cleaning the metal. I've ground
back the duff welds so I can do them again and called it a day for today.
The question is, given you have a joint that you've tack welded together some weeks ago how do you go about making sure that it's clean
enough to weld. Do you simply apathetically wave a wire brush over it, whizz a drill powered wire brush over it or do all of the above and wipe it
with some magical cleaner fluid that I'm unaware I'm supposed to be using.
Also, anti-splatter spray... great boon or waste of time?
Cheers,
Mark
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JoelP
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| posted on 16/1/05 at 05:48 PM |
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i rarely ever clean it before welding - didnt know you were meant to! i use argoshield gas, always on full flow, and it seems to work well normally. I
only use my two favourite settings on the welder, cos im not very adventurous! I find that mess and splatter is sometimes caused by excessive wire
speed, or insuficient amps (the two are sort of linked in my opinion). Have a fiddle, and check the gas is coming out well...
in the past ive been stitched up when ive knocked the settings and not noticed.
[Edited on 16/1/05 by JoelP]
Beware! Bourettes is binfectious.
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Lotusmark2
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| posted on 16/1/05 at 06:17 PM |
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Just as a quick side topic to this, what amps do you guys use??, I am lookingg at buying a mig and dont know if I should bother going up to a 130 or
150 or just get a 100.
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GeoffT
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| posted on 16/1/05 at 06:19 PM |
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Mark,
Also make sure you haven't got any magnetic welding clamps near your weld - these seem to affect the gas shield and make it splatter
all over the place.
Unfortunately when I first encountered this I'd thrown the business end across the garage in a fit of pique before I discovered the
cause. It's still held together with wire to this day.
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mattpilmoor
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| posted on 16/1/05 at 06:22 PM |
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Hi,
I got one of these off ebay. Service was great and it does the job perfectly.
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=64818&item=3865598348&rd=1
Hope this helps
Matt
Measure twice - Cut once - Still f*!K it up!
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jerry
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| posted on 16/1/05 at 06:32 PM |
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welding advise
check amps and wire feed. too low on the amps makes for lumpy welds too high on wire feed also makes for lumpy welds. dont know what welder your using
but if your at home set it mid way on the amps and adjust the wire feed. if you blow through knock it down a notch and adjust wire feed to suit. as
for antispatter spray you dont need it.use tip dip to keep your shroud nice and clean.
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JoelP
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| posted on 16/1/05 at 08:27 PM |
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good welder have in the past recommended that you get the maximum amps you can afford.
Beware! Bourettes is binfectious.
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dern
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| posted on 16/1/05 at 08:47 PM |
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Yay, figured it out.
It occured to me (during tea) that if I was welding with the piece below the torch I'd get a good weld but if I was welding with the piece
vertically (iyswim) it looked rubbish and this also happened when I was welding into a corner. It further occured to me that maybe I was getting the
torch angle wrong and that on the flat I was holding the torch at the correct 70 degrees (according the book I have) but that I was holding the torch
at 90 degree when welding vertically or into a corner. So I went back out and tried again but remembered to hold the torch at the correct angle and
bob's your uncle, clean proper welds again.
Phew
Thanks for the tips though.
Regards,
Mark
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dern
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| posted on 16/1/05 at 08:49 PM |
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quote:
Originally posted by Lotusmark2
Just as a quick side topic to this, what amps do you guys use??, I am lookingg at buying a mig and dont know if I should bother going up to a 130 or
150 or just get a 100.
I've got a 150TE clarke and am welding one notch off maximum... I'd go for a 150+ if I were you (but
there's a lot more technically to it, apparently, other than the number on the box. A search on this forum will reveal all the gory details.
Good luck,
Mark
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