stewy1984 Posted February 18, 2009 Share Posted February 18, 2009 Can anyone give me some advice/tips on welding tubes together please? this is my first try today at notching and welding, its 45mm OD CDS 3mm wall, need some practise before i attempt my challenge wings. cheers Quote Link to comment Share on other sites More sharing options...
Les Henson Posted February 19, 2009 Share Posted February 19, 2009 Looks to me like half good and half bad. First pic is 'ok', but second pic there seems no penetration. If you didn't alter the settings, then you speeded up or over stretched yourself to minimise stop and start on what might be better as a single run. On some angles you might only get 1/3 to 1/2 a single weld for the circle you need. Start a little over the end of the last weld and do the next bit. Les. Quote Link to comment Share on other sites More sharing options...
stewy1984 Posted February 19, 2009 Author Share Posted February 19, 2009 Cheers les, what i did was tack it at 12 3 6 and 9 and then try to weld inbetween each tack to try not to heat it up to much? Quote Link to comment Share on other sites More sharing options...
white90 Posted February 19, 2009 Share Posted February 19, 2009 Here's my take Quote Link to comment Share on other sites More sharing options...
stewy1984 Posted February 19, 2009 Author Share Posted February 19, 2009 i think i moved to fast on that one. I only started learning to weld this week Quote Link to comment Share on other sites More sharing options...
Les Henson Posted February 19, 2009 Share Posted February 19, 2009 You're doing well then - it took me a lot longer than that. Les. Quote Link to comment Share on other sites More sharing options...
pete3000 Posted February 19, 2009 Share Posted February 19, 2009 Good effort so far Stewy, considering only a week. Bit more current then metal should start to fuse in with the weld if you burn through you have too much. Also which gas/machine are you on? get yourself over to www.mig-welding.co.uk for some top advice. Lots of help with welding issues, along with tips and rate my welds pictures, a good few members from here are over there also. I have learn't plenty including which machines to steer clear of and how a weld should look along with methods and solutions. Its not a commercial site so hopefully I haven't broken and rules in linking Pete Quote Link to comment Share on other sites More sharing options...
bluespanner Posted February 19, 2009 Share Posted February 19, 2009 How did you notch the ends, Stewy? Quote Link to comment Share on other sites More sharing options...
landmannnn Posted February 19, 2009 Share Posted February 19, 2009 i think i moved to fast on that one. I only started learning to weld this week Keep practicing stewy, I find I can do a perfect weld one minute and then a load of rubbish the next. the more you do the more consistent you will get. Looking at the joint one the right where you can see down the tube it looks like your notching needed to be a bit better because you can see the actual weld on the inside. Quote Link to comment Share on other sites More sharing options...
stewy1984 Posted February 19, 2009 Author Share Posted February 19, 2009 Yeah landmannnn that notch was terrible so gave up, the second one had probs max 1mm gaps. bluespanner i used this program (nicked the link off here somewhere) and used a grinder http://www.metalgeek.com/static/cope.pcgi Quote Link to comment Share on other sites More sharing options...
FKD Posted February 19, 2009 Share Posted February 19, 2009 Evening, my first post so be kind! The old guy that taught me to weld when I was doing my time said the secret to a good weld was position, that is of the guy welding, in short if you're not comfortable and cant see the hole section of your weld from start to finish , how can expect a good result? Oh and practice,lot off it! As part of my routine I always lay a practice bead down before I start,just in case there is a problem, better to catch it straight off than on a job Quote Link to comment Share on other sites More sharing options...
Bluemoon Posted February 20, 2009 Share Posted February 20, 2009 there's a nice little program here (www.tonyfoale.com/software.htm)for tube mitres, after downloading , click on file and put your sizes and angle, then print. jobs a goodin, Brian Quote Link to comment Share on other sites More sharing options...
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