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This is my first post here. I want to thank everyone who posts here for the thoughtful helpful information you have posted here. I have a couple of questions below but have to say- you guys have taught me a LOT! I followed some folks over here from garagejournal through some links there and I am SO glad I did. I have a lot of ideas and thoughts about redoing my utility trailer into a camping/off-road trailer among other things but having never welded before you guys have shown me enough to make me realize I need to walk before I run. I have completely changed my approach and instead will focus on welding small non-structural items until I have proven that I can weld sufficiently (and proven it through tearing welds apart) that my welds are not really good looking caulk on the surface of metal. I am a build it bigger and stronger type of person but I have learned a LOT that I never knew about engineering and the stresses of a trailer in reading through the posts about trailer builds etc. I cant thank you guys (and girls!) enough! And tons of unknown people out there on the road thank you too! This thread in specific was so incredibly helpful:http://weldingweb.com/vbb/showthread.php?t=10701I know its 5 years old but it really helped me get a better understanding of the physics (I think its physics?) behind the capabilities of a 110 v. 230 machine. Yeah I have gone through 80 pages of the posts there just reading
.some great info from everyone. I only have about 100 pages more to go in that one area! So my question relates to welding specific sized metals- I finally get (uh-oh
some newbie thinks he gets it! Run away!!! ) the heat sink aspect of thicker metal which prevents penetration of the weld. So while I cant weld ½ inch plate with a 110 welder would the same hold true with ½ rod? (Again- in non-structural welding- artwork and the like). What I mean is- the heat sink properties of ½ inch plate with its smaller surface area to total material area (in cubic inches/feet/whatever) would seem to me to be much greater than the heat sink aspects of ½ inch rod that I can run a bead all around. And so while a ½ plate would be beyond the capabilities of a 110 welder, wouldnt a 110 be able to weld a ½ rod sufficiently? Heres how I see it but please tell me if/where I am wrong. I am posting this (and will post a bunch of other stupid questions I am sure) in the hopes of learning so I take all criticisms openly). If I am welding a ½ plate to another ½ inch plate for a T-joint the heat generated at the point of the weld will dissipate into the plate which will prevent good penetration. But in welding two ends of a ½ inch rod together there is so little material in the rod (compared to the surface area) that the heat will NOT dissipate as quickly and as a result the weld would see greater penetration and thus be a strong/quality weld. Does this make sense? (Again- if I am wrong- dont be shy about telling me). Second question- if you are trying to weld something at the end of the capabilities of a welder can you use a torch to heat the material and then weld it? I saw in a post by Expat in Africa he was welding some giant (giant meaning fn huge! ) mining equipment and saw that they ran torches on the material for an extended period of time to get it much hotter prior to welding it and wondered if this would be reasonable to do in a smaller scale. All things being equal I know that a bigger 230 machine would be the right way but in a pinch (sadly this economy has not left me with the financial power I would like!) would you be able to get a 110 to do what a 230 could otherwise do at normal ambient temps by heating the metal prior to attempting a weld? (Again- think non-structural
..I am not going to hang a trailer repairs here shingle out!! But I am really interested in the physics behind the assumption.) Sorry for the long rambling post from a new guy. Sadly as much as I have checked in my area of Taxachusetts (near Worcester) I can't seem to find any welding classes I can take (the local Vo-Tech school doesnt have any adult ed welding classes) so I am trying other alternatives such as finding a local welder I could volunteer time at in trade for learning to weld. I welcome any other ideas anyone may have for learning more/better/faster. Thanks!
Reply:ok. there are a couple lines of thought in that. first. for NON STRUCTURAL welding with the 110v on 1/2 rod will be fine. Also beveling your joints and making multiple passes will help as well. second, Heating the peice/joint before welding will help with penetration. You still wont get as much as you would just using the 230v but you'll be better off than you would without the preheat at all.Glad to see some people can see we're not just blowing smoke when we warn people about structural welding, and the disadvantages of 110v welders.There are no problems. There are only solutions. It's your duty to determine the right one.Hobart Handler 210Airco 225 Amp MSM Stinger
Reply:Okay Thors thank you- I appreciate the feedback. |
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发表于 2021-8-31 23:42:59