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I have been asked to weld some flush patches into a snow mobile tunnel that is .060 thick. Appearence is not the biggest concern because the area of the patch will never be seen once the sled is reassembled. I said I would try and do it. I have .030 in the gun should I use this or get some .023 ? I need to know how to keep heat to an absolute minimum. Thanks.snoboyMillermatic 210 w/ spoolgunThermal Dynamics 51Smith O/A torch set
Reply:Can you test out setting on the patch material? try about 50 (120 max) amps at first (Im looking at a chart Ive got ). Its the minimum amps for .030 according to this sheet. It says wire feed speed about 250-550ipm. Can you even get .023 aluminum wire? Hope that helps.Various GrindersVictor Journeyman torch200cf Acet. 250cf oxygenLincoln 175 plus/alpha2 gunLincoln v205t tigLincoln 350mpEsab 650 plasmaWhen you can get up in the morning, Its a good day.Live each day like its your last.
Reply:I use .035 4043 wire on .040 to .080 aluminum at work. We have used .030 4043 wire as well. Pure argon gas only. Not much difference with .030 or .035 wire in settings or how it welds except for a little more wire speed needed for the thinner wire. I've not seen .023 aluminum wire anywhere. .023 is made in steel though. The joints I weld at work are mostly butts and outside corners, some with gaps to weld accross, very prone to burn-through without a heat sink behind the weld, but we weld it both ways with consistent success. Using a heatsink does make it easier though. I usually use the pulser but spent a few months welding without the pulse with equal results, just takes more concentration, faster torch travel speed and less voltage with more wire speed. Pulse just makes it alot easier to make a nice weld on the thin stuff. With the pulser I weld at around 18 to 20 volts and around 40 amps with about 140 to 180 ipm of wire depending on the weld. Without the pulse I weld around 14 to 16 volts and 250 to 300 ipm of wire. I forget what the amperage is. If there is run-in speed adjustment on your feeder, it helps to run that low for a smoother start. I also like to use some gas pre-flow time and keep the flow rate up for a cleaner weld. Significant part of your success with the project will depend on 2 things: clean the metal real good and fit it up as close as possible before you start welding. Gaps in the joint and dirty metal make it alot harder to come up with a nice weld on this thin aluminum. To keep the heat down, weld short sections at a time, avoid long beads, take breaks in between to allow cooling and jump around to different areas alternating sides to avoid warpage. Tack it in a few places too.Have fun!
Reply:Thanks for the tips. I have a MM210. I don't know how to measure amps or wire speed in real numbers. My machine has 7 taps for voltage. I guess I'll try at the lowest recommended aluminum setting for .030 and practice triggering on it and add some wire speed if I need. Thanks again.snoboyMillermatic 210 w/ spoolgunThermal Dynamics 51Smith O/A torch set
Reply:Sounds good! Happy welding . |
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发表于 2021-9-1 00:12:21