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| How do I start welding? |
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| raynerd:
Thank you very much for all your replies. It is interesting to yet again read all the different advice and it is still tricky to know what route to go down! I'm just out visiting family so will need to revisit this thread and digest it properly tomorrow. Just to clarify a few issues: I wouldn't dream of welding in my cellar or storing gas in there. I intend this kit to be kept in my grandparents outdoor shed to use as and when needed. I think maybe my mentioning of "thin plate" was misleading in my original message I'm talking 3-10mm plate and bar. Basically, making racking frames, welding box section...that sort of thing. The truth is, I want to make a weathervane and want to weld it!! I could use copper and solder or even aluminium and rivet it.... But I've always wanted to learn to weld so may as well give it a go now. I'll keep reading and do more searching. Does anyone know what sort of price I'd be looking at to get the gases and first bottles (I.e first setup) for mig ? |
| BenH:
I use Adams Gas rent free trade sized ones, but depends on where you are as to what supplier you can get. http://www.adamsgas.co.uk/index.php/hobby-gas-welding. |
| DavidA:
AdeV, ... the more oxygen needs to be in the shield gas.,, I never knew that. I always assumed that the idea of shield gas was to keep out oxygen. And I've been welding for fifty or more years. Just shows how one can bumble along. Dave :doh: |
| mattinker:
--- Quote from: DavidA on November 05, 2013, 07:03:40 PM ---AdeV, ... the more oxygen needs to be in the shield gas.,, I never knew that. I always assumed that the idea of shield gas was to keep out oxygen. And I've been welding for fifty or more years. Just shows how one can bumble along. Dave :doh: --- End quote --- Well spotted, somebody got it the wrong way round! Free oxygen (not attached like the O in CO2) it to be kept out by the shield. Regards, Matthew |
| Fergus OMore:
What no one has mentioned is that the flux in both oxy and mig/mag is carbon dioxide. The argon is basically for smoothing the weld- or the world could weld on 'pub gas' bottles. Dead cheap but if you are only welding garden gates and the like, why not? Let me turn to thin body shell metal. Of course the heat from a mig/mag machine can blow holes in it- in ten seconds flat on the torch. We got whole Nissan Primeras that had failed the Nissan inspection -to play. the caveat was that we had to return them so that the VAT could be reclaimed at the factory. Nevertheless, the tutors would get an air saw and hack a wavy line in a wing or wherever and we had not only to stick it back but prepare it for the paint shop. So this was high strength low alloy niobium steel- which you can gas weld but only if you want it to crack- sometime, whenever but it would! OK, I made up little clamps to pull up the waving metal and gapped it and then skip welded it using half inch runs missing a half inch weld another little run etc etc. Then I would fill in the gaps and let it cool and go in with a flexible body file. That was the easy bit. Aligning a car and going through the zinc coating by stitching with a mig and getting the zinc to flow back evenly was fun. But I digress! Cheers Norman |
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