Needs Pictures: 0
Picture(s) thanks: 0
Results 1 to 7 of 7
-
7th Apr 2019, 09:28 PM #1Philomath in training
- Join Date
- Oct 2011
- Location
- Norwood-ish, Adelaide
- Age
- 59
- Posts
- 6,561
Welding Al castings for non-welders
Every so often someone asks if an aluminium cast part can be welded up (I think we have had at least 2, perhaps 3 in the last 6 months). I found this video today that shows the difficulties and quality of result that can occur while welding a casting.
https://www.youtube.com/watch?v=p62Cyqe714Q
This guy is one of the better welding sources on Youtube and his skill level and knowledge is pretty good, so if he is having trouble...
Anyway, thought I'd post it just to show members who don't weld why there is not a queue of people waiting to repair their castings.
Michael
-
7th Apr 2019, 11:30 PM #2Most Valued Member
- Join Date
- May 2011
- Location
- Murray Bridge S Aust.
- Age
- 71
- Posts
- 5,959
Thanks for this Michael. He's certainly doing a dam fine job with what he has to work with. Little wonder they charge what they do trying to make a silk purse out of a sows ear.
I've had it where the porosity of the parent metal actually comes up through the weld metal. It's repaired but looks like CRAP.
KrynTo grow old is mandatory, growing up is optional.
-
8th Apr 2019, 08:43 AM #3Philomath in training
- Join Date
- Oct 2011
- Location
- Norwood-ish, Adelaide
- Age
- 59
- Posts
- 6,561
I've had castings that weld reasonably well, but some have been terrible. In a way, it is nice to see that my experience is shared.
A lot of the time I think the better (stronger, more reliable) way to repair a broken casting like that is to machine up a new one from solid.
Anyway, I think it a great example of the problems that can arise in a 'simple repair'. Before starting to weld Al, I would have wondered what the issue was and why it was so difficult too...
Michael
-
8th Apr 2019, 10:28 AM #4Most Valued Member
- Join Date
- Aug 2011
- Location
- Melbourne
- Posts
- 4,779
Thanks Michael,
I have only ever needed one aluminium casting repaired (a splash guard for my surface grinder) and I out-sourced that job to the local steel supply/fabrication place. I had a good report with the owner and he looked after me with odd jobs like that. He has since sold the business to one of the workers (who I also have a good relationship with) but given he probably had to heavily invest in the business, I think that level of good will has evaporated!
Bottom line is, it may be time I re-visited the idea of trying my own aluminium welding. It's timely because I am in the process of restoring a Gilbro combination table saw/planar that has a cast aluminium guard that needs repair!
SimonGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
-
8th Apr 2019, 10:37 AM #5Most Valued Member
- Join Date
- Jun 2011
- Location
- Australia east coast
- Age
- 71
- Posts
- 2,713
Not sure this is a sensible thing to do -unless you really want an excuse to buy more tools.
Aluminium welding is a bit fussy, moreso than steel by far. I can do it, I've got my old welding ticket saying I can do it, but mostly I don't. I pay the local welding place their standard commercial rate to do the odd jobs for me. It's less stressful all round.
Now all the steel welding on the boat is finished, I may re-tool my MIG with a spool gun (which I have in the cupboard already) and practise to where I'm competent again with aluminium, but that'll be fabrication using bar, tube and the like. For really fussy stuff I'd need to spend at least $2K to buy a decent (by my standards) AC-HF TIG welder with 300A output at 60% duty cycle. Nothing smaller would be of any use to me.
PDW
-
9th Apr 2019, 05:12 PM #6
I've managed a few motor bike casing repairs so far and a 20" HSV senator wheel that'd been holed by a center punch left conveniently on the road.
With bike casings you can definitely tell the brand name matters for ease of repair... Honda XR casting was an easy fix compared to a the chineesium casting from a $500 ebay quad bike, and the HSV wheel welded up with barely any fuss at all.
Following repairs vids by Abom n Fenner and a few others clean it good and go over the repair area with the AC balance cranked up first then remove the "Mal Gabbet" with a die grinder then chemically(degrease/acetone) and weld away... bump welding seems the easiest way especially with thin casings.....................................................................
-
9th Apr 2019, 08:12 PM #7Diamond Member
- Join Date
- Mar 2014
- Location
- South of Adelaide
- Posts
- 1,227
We have resorted to devcon to repair castings that were too hard to weld at work. works good for non structul stuff like gearbox covers.
Jodi Collier is pretty knowledgeable with tig welding. His background is weld repair and inspection at delta airlines. lots of funky alloys and high standards. He is one of the guys on the 'welding tips and tricks' postcast, a real good listen if you are interested in welding.
Similar Threads
-
Repairing Castings
By DSEL74 in forum METALWORK GENERALReplies: 0Last Post: 12th Jun 2013, 09:04 AM -
N.S.W. Gear Hobber Castings
By Swarfmaker1 in forum METALWORK - Machinery, Equipment, MARKETReplies: 3Last Post: 24th Jul 2011, 06:26 PM -
TIG & MMA Welders & Welding
By Metal Head in forum WELDINGReplies: 38Last Post: 20th Jun 2007, 05:41 AM -
General welding safety for DIY welders
By Grahame Collins in forum WELDINGReplies: 13Last Post: 15th Jun 2006, 02:10 PM