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Welding for n00bs
Posted: Sun May 20, 2007 1:53 pm
by Shorty40
Posted: Sun May 20, 2007 2:21 pm
by AdrianGQ
not to bad for a beginner your main problem in the fillets looks to be overoll witch is the big lumpy bit in the bottom part if the weld, this can be corrected a fair bit by turning the wire speed down a little and there is also some undercut in the top toe of the weld this could be caused by holding the gun on the wrong angle you just need to lower the angle a little to help correct it .
also after a second look it seems to be running a little cold too
and always remember its better to run hot and look crap than run cold and look good. as you get more practice you will be able to run it hotter than you thought was possible
Posted: Sun May 20, 2007 3:07 pm
by Daisy
no penetration on one side of the steel. you need to focus on the whirlpool when welding to make sure that BOTH sides of the metal are melting together as you can see on most of your welds that the heat is directed to only one side of the job.
Practice on something else rather than the job would be my advice... til you get it right then go for it.
Posted: Sun May 20, 2007 4:31 pm
by Slunnie
I tend to agree, particularly with Daisy, and think that the weld will probably break.
I tend to think that every man and his dog has a different technique in welding, and I know how I weld is different to the next fella at work. I can tell you what I would do there, knowing that others do it differently and successfully. First I like to run a lot of heat into the job and get good penetration. I then weave a broad weld into the job over both pieces, by laying the gun over and pointing it at the bottom pience laying the lower part of the weld and then bringing the tip up onto the upper piece of the job, working your way along. Don't go too hot for the material otherwise you will blow through the job or produce undercuts into the job, the weld should flow smoothly onto the job surface.
This said, its all about practice, practice, practice, but you have to get penetration. You can tell it hasn't penetrated as the weld looks like its sitting on the job, like a bead of water sits ontop of a waterproof surface with the meniscus undercutting the weld.
Posted: Sun May 20, 2007 4:53 pm
by Daisy
Posted: Sun May 20, 2007 5:18 pm
by Shorty40
Damn
I thought I did alright. Guess I will have to get the experts to go back over my work.
Thats a cool link Tom - cheers
Thanks for the advice guys - as I said it was my first attempt, so I didnt expect rave reviews
But after having a play, it has certainly got me interested.
Posted: Sun May 20, 2007 5:53 pm
by CWBYUP
For your first go mate not bad.
Just do more practice ( off the buggy ) and your be alright.
I've seen a lot worse first attemps.
Nick
Posted: Sun May 20, 2007 6:09 pm
by mud4b
Daisy wrote:no penetration on one side of the steel. you need to focus on the whirlpool when welding to make sure that BOTH sides of the metal are melting together as you can see on most of your welds that the heat is directed to only one side of the job.
Practice on something else rather than the job would be my advice... til you get it right then go for it.
its all good man it was welded underneith.. so it will not break..
Posted: Sun May 20, 2007 6:14 pm
by 80lsy gq
well how do these ones look then...critique my welds
these were all done with a Mig o Mag 240 on various sizes of material from 2mm up to 10mm
dave
Posted: Sun May 20, 2007 6:15 pm
by 80lsy gq
and here is one from the Daisy school of welding
Posted: Sun May 20, 2007 7:05 pm
by GQ4.8coilcab
80lsy gq wrote:well how do these ones look then...critique my welds
these were all done with a Mig o Mag 240 on various sizes of material from 2mm up to 10mm
dave
now your showing off hahahah
very good
Posted: Sun May 20, 2007 7:35 pm
by Modified Toy
see in the pics the steel is arranged so that you are welding in a gutter stronger than a perfect right angle correct me if i am wrong but it is stronger to weld a verticle weld from bottom to top not as neat but stronger.
Posted: Sun May 20, 2007 9:32 pm
by awill4x4
Bl@@dy Mig welders, Ha I blow my nose in your general direction.
Regards from the Tig meister
Posted: Sun May 20, 2007 9:47 pm
by pongo
put the fancy migs away and bring on the old sticks and oxy welding
then we will see the tradies
i cant get enough amps from the house i rent. Ive already melted the wires at the power box. now i turn off all elec things before i start to weld now
Posted: Sun May 20, 2007 9:51 pm
by Shorty40
awill4x4 wrote:Bl@@dy Mig welders, Ha I blow my nose in your general direction.
Regards from the Tig meister
From what I see of your welds, you can afford to blow you nose in most peoples direction
But we all have to start somewhere
Posted: Mon May 21, 2007 6:47 am
by 80lsy gq
awill4x4 wrote:Bl@@dy Mig welders, Ha I blow my nose in your general direction.
Regards from the Tig meister
the welding machine has spoken.....
Posted: Mon May 21, 2007 7:04 am
by Mulisha
80lsy gq wrote:awill4x4 wrote:Bl@@dy Mig welders, Ha I blow my nose in your general direction.
Regards from the Tig meister
the welding machine has spoken.....
Can you post up some pics of ur welds awill4x4
Those welds of Daves looked bloody awersome so i wouldn't mind seeing how bloody nice urs would be then.
Rick.
Posted: Mon May 21, 2007 7:40 am
by Micka
80lsy gq wrote:well how do these ones look then...critique my welds
these were all done with a Mig o Mag 240 on various sizes of material from 2mm up to 10mm
dave
They look more like Buddy welds to me, Dave.
Are you passing off other's work as your own
Posted: Mon May 21, 2007 9:38 am
by matthewK
not too bad for a beginner
welds look like it was welded a bit cold and a bit of over roll which i think is either tooo much wire or you had the gun to far away from the job , but not too bad
try truning ya corse up a tad and starv the wire a lil so that you get that nice spray look and a nice crackle sound this is how i weld alot of the time,
im a 2-3year boilie apprentice, and i have been shown diferent ways
but mainly from 4 guys 2 of which worked in the mine over in the west and up in QLD and the other german and auizzie justr been in the trade 20years+
chin up lots of practice and ya could be shit hot
Posted: Mon May 21, 2007 9:46 am
by matthewK
80lsy gq wrote:well how do these ones look then...critique my welds
these were all done with a Mig o Mag 240 on various sizes of material from 2mm up to 10mm
dave
they dont look too bad , but should of learnt by now not to stop at the edge of the plate and continued around the squre pipe corners a good 10mm, and blend in the stop starts, only reason i been told this is its the first place the weld will fail, iv been told by tradeschool teachers Darryl and rob v from noble park and tradesmen alike
so there
Posted: Mon May 21, 2007 11:03 am
by Shadow
Modified Toy wrote:see in the pics the steel is arranged so that you are welding in a gutter stronger than a perfect right angle correct me if i am wrong but it is stronger to weld a verticle weld from bottom to top not as neat but stronger.
not sure, but if you were that worried about strength it would be better just to stick weld it. Youl always get better penetration with a stick welder than a mig.
Posted: Mon May 21, 2007 3:53 pm
by eliteforce32
not necssarily
....... ive seen some of the welds on this forum as verticle downs
... as said before a nice birdie up... yes practice before you do this either on mig or stick..... tig what can i say yeah its great but time consuming on positional welds
....
as for gas welding (oxy work) pfft almost non existent these days....... come to the 21st century guys.
as for the welds in the above post as in 80lsy gq welding is a little cool and slight over roll
Posted: Mon May 21, 2007 4:11 pm
by MART
So Dave , if you actually did those welds , I take my hat off , very neat and tidy , and no I am not taking the piss , I will now look at you with another light , and when are you going to post up ypur 4wd , cause if it,s as good as your welds it should be good Cheers Paul.
Posted: Mon May 21, 2007 6:38 pm
by zagan
80lsy gq wrote:well how do these ones look then...critique my welds
these were all done with a Mig o Mag 240 on various sizes of material from 2mm up to 10mm
dave
1st to me looks perfect and is convex.
2nd/3rd good welds but the middle of the weld is concave it should be convex, you don't want your welds to crack up the middle of them.
4th too far away, but looks like a mix of 1st and 2nd/3rd welds.
Posted: Mon May 21, 2007 7:10 pm
by uninformed
Shadow wrote:Youl always get better penetration with a stick welder than a mig.
i've heard this before. but i haven't heard it explained why. i think its an old wives tale
serg
Posted: Mon May 21, 2007 7:13 pm
by Shadow
uninformed wrote:Shadow wrote:Youl always get better penetration with a stick welder than a mig.
i've heard this before. but i haven't heard it explained why. i think its an old wives tale
serg
Well I was told it buy an accredited site welder who can lay incredible welds down when hes hanging upside down 3 stories in the air with slag burning through his forearm. So i believe it.
Posted: Mon May 21, 2007 7:17 pm
by 80lsy gq
Micka..whatever....i dont claim other peoples work as my own....and i certainly wont be claiming your efforts on cookies buggy as mine
Mart..sorry to devastate you mate but they are actually mine..i knew you would be all over this thread like a fat woman over an icing covered donut...
..
anyway..this is a flame shorty thread..i have enough threads flaming me already
dave
Posted: Mon May 21, 2007 7:41 pm
by A1
80lsy gq wrote:Micka..whatever....i dont claim other peoples work as my own....and i certainly wont be claiming your efforts on cookies buggy as mine
Mart..sorry to devastate you mate but they are actually mine..i knew you would be all over this thread like a fat woman over an icing covered donut... ..
get a room will ya Dave and settle this
anyway..
this is a flame shorty thread..i have enough threads flaming me already
dave
Some people should weld others should not Dan take the second advice ....stick to what ya good @ ....mmmm what the fark is that actually
Posted: Mon May 21, 2007 7:43 pm
by A1
Joke
not bad considering your first effort mate practice grasshopper ...
Posted: Mon May 21, 2007 7:51 pm
by familybus
im not a great welder but who cares at least i gots a mad welder and a mad helmet to look good while farking things up!