Originally Posted by nitrodann
(Post 1008123)
How do you possibly fit the torch inside and do a nice weld? And it wont look nice on the outside at all.
there MUST be an answer the pros know that I just dont. |
Dam... Ive done enough of these now and i dont have any training in welding or anything and i hoped I could find someone who knew.
I want to just email a few companies who are pro but in other countries and asking if they have time to give me pics to show how. Its the only thing i havnt really figured out how to do nicely. Dann |
Originally Posted by TurboTim
(Post 1008132)
Build a metal box that's open on top, place part inside, remove the collect/insulator thing from your torch, fill the box with argon, profit?
Dann |
Charge more.
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gas lens will allow for up to 3/4" electrode stickout.
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Originally Posted by Erat
(Post 1008150)
Charge more.
But i want all the fab work i can get for experience. Also i dont know how much my work is worth i dont want to scare people away. how much flow for 3/4 inch? Dann |
Originally Posted by Stein
(Post 1008165)
gas lens will allow for up to 3/4" electrode stickout.
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o.0
an inch? I never go more than maybe 1/4.. am I doing it wrong? Dann |
I normally never go more than the diameter to 1.5* the diameter of the tungsten out. But sometimes trying to fit into really tight spots you gotta do what you gotta do, and a weld with marginal shielding gas is going to seal better and be stronger than no weld at all.
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My grind is usually 1/4" long. Then my tungsten sticks out about 3/8". #7 cup is normal.
I dunno... Maybe i'm doing it wrong. |
Make your collectors shorter so that there isnt as much pipe on the end your welding.
That way you dont need as much tungsten stickout |
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I'm going to go with theres multiple ways of doing things. I was taught by someone who went by the 1-2 times the diameter of the tungsten should be out of the cup, if you need to do more than that, turn the gas flow up.
But if they're too short you run into a worse problem. Mine were really short, welding the pipe to the collector was a bit of a bear once there was more than one runner on it. You can see how tight the merge was on this side. Attachment 185504 And no I'm not terribly happy with my weld quality on this, I've done much better, I was experimenting with ceriated tungsten and trying to weld sch40 with on 110v. |
Took this from the Toxicfab facebook page.
See how short his collector is? makes it wasy easier to weld between the pipes. https://fbcdn-sphotos-a-a.akamaihd.n...71842083_o.jpg |
Originally Posted by Leafy
(Post 1008199)
And no I'm not terribly happy with my weld quality on this, I've done much better, I was experimenting with ceriated tungsten and trying to weld sch40 with on 110v.
But quit trying "different" fancy shit. Just learn the basics first man. I'm not really sure where to start with this. If you were running on 110, you were using allofit because that is REALLY hot. I'm not even sure where to point you, because i feel there is so much to fix. I think i told you this before, quit flat pedaling it. Get yourself some flat stock, and see how small of a bead you can make. Turn that thing way down and hardly made a bead. Get your gap super super close too. |
sorry I honestly cannot follow how the short collector makes it easier. how sorry?
Dann |
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Originally Posted by Erat
(Post 1008210)
Probably going to come off wrong.
But quit trying "different" fancy shit. Just learn the basics first man. I'm not really sure where to start with this. If you were running on 110, you were using allofit because that is REALLY hot. I'm not even sure where to point you, because i feel there is so much to fix. I think i told you this before, quit flat pedaling it. Get yourself some flat stock, and see how small of a bead you can make. Turn that thing way down and hardly made a bead. Get your gap super super close too. Attachment 185502 I've gotten a lot better since that manifold. Attachment 185503 |
Originally Posted by nitrodann
(Post 1008214)
sorry I honestly cannot follow how the short collector makes it easier. how sorry?
Dann basically instead of having a 5 degree window that your cup can fit into you have a 60 degree window. Im not saying to make it a short one with a larger angle, just less length after they actually merge. Try it and you will see. |
Shortnening the collector that far ruins the scavenging properties.
I always assumed you would have to weld the spike portion from the inside of the collector with a long gas lens. You could use a cheap sand blasting cabinet as a gas chamber and evacuate the whole thing with argon, than a gas lens would be unnecessary. |
Couldnt you just pump argon inside the pipe? I know its used as a shield but to build a sealed box for welding it is a bit silly; I already saw someone said just blast argon, and stick the tungsten rod out a bit far, but doesnt that also make the weld a bit weaker in penetration?
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21 Attachment(s)
Here's how I make collectors. Keep in mind, I cut out the triangle points and weld them to the header tubes without the collector, then weld on the collector.... That way I don't have to do any welding on the inside.
I make my bend by cutting off the starting end of a u bend. Yes they're not perfectly symmetrical on the front and back. Transfer dye for scribing a line Attachment 185481 Device for scribing a line 45* off 90*. Scribed in 2 positions, 90* apart. Attachment 185482 Attachment 185483 Both lines scribed Attachment 185484 Then cut them all with a bit extra Attachment 185485 As you can see I have plenty to finish these headers (big block Chevy) Attachment 185486 Made the fixture for the 14" abrasive saw, the rear tightening "pin" has a bolt you tighten to get the back snug. Attachment 185487 Attachment 185488 Attachment 185489 Then you end up with these, rough and in need of deburing. Attachment 185490 Debured. Attachment 185491 I tack one half at a time Attachment 185492 Then I am done, here is a before, and after of trimming material. I do a rough cut with the cutoff wheel, then pass it on the belt sander. Attachment 185493 Ooo sexy. Attachment 185494 Attachment 185495 Then it gets flared out at the end Attachment 185496 Video of flaring on hydraulic press, with anti size as a lube. Just so it's said I was being sarcastic when I said "what do I do now?" http://i104.photobucket.com/albums/m...9B1E93FA5B.mp4 Made a tapered cone, this is the fixture for back purging. Lol a bulkhead worked nicely for the bung to fit. Attachment 185497 All done! Attachment 185498 Attachment 185499 Attachment 185500 And here's a nice weld I wanted to show off. Attachment 185501 |
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