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aluminium welder wanted #450135
7th Dec 2010 8:23pm
7th Dec 2010 8:23pm
Joined: Jun 2005
Posts: 2,163
wirral
M
markeee Offline OP
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markeee  Offline OP
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Joined: Jun 2005
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wirral
got a bike frame i need fixing



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Re: aluminium welder wanted [Re: markeee] #450136
7th Dec 2010 8:35pm
7th Dec 2010 8:35pm
Joined: Feb 2009
Posts: 1,952
tranmere
chris_gilly Offline

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chris_gilly  Offline

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tranmere
cant you buy a cheap arc and buy the right sticks?

Re: aluminium welder wanted [Re: markeee] #450137
7th Dec 2010 8:37pm
7th Dec 2010 8:37pm
Joined: Oct 2008
Posts: 3,557
birkenhead
kimpri Offline

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kimpri  Offline

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birkenhead
mike hose motorcycles kelvin rd wallasey, right opposite st Paul's rd.


Does your vacuum suck? Get a Dyson!!


Re: aluminium welder wanted [Re: kimpri] #450242
8th Dec 2010 10:24am
8th Dec 2010 10:24am
Joined: Dec 2006
Posts: 1,994
wirral
vw_kyle Offline
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vw_kyle  Offline
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wirral
altrite mate try arrowebrook engineering on poulton road use to work there they,ll do a good job

Re: aluminium welder wanted [Re: vw_kyle] #450387
8th Dec 2010 2:46pm
8th Dec 2010 2:46pm
Joined: Aug 2006
Posts: 855
Birkenhead
A
anniebo28 Offline
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anniebo28  Offline
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Joined: Aug 2006
Posts: 855
Birkenhead
You dont want to buy a TIG set just to do one bike frame. A crap second hand one will set you back over 250. You can use MIG with the right wire and gas but the weld is rubbish, you cant use ARC as its way too powerful and will blow holes in the thin gauge metal.
Take it to an engineering company and they will do it for you for cheap, if you speak to them nice, they may even do it for free!
I have had TIG sets before and you want someone who can properly TIG weld and not just someone who can melt some metal over the crack, especially when its going to be taking a structural load, i.e. bike frame.

Re: aluminium welder wanted [Re: anniebo28] #450393
8th Dec 2010 3:04pm
8th Dec 2010 3:04pm
Joined: Aug 2010
Posts: 309
Wallasey
dan0h Offline

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dan0h  Offline

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Wallasey
Tread careful if its an expensive frame, it could well have quite a high percentage of magnesium in the alloy, and it's no fun to end you're life in a huge flash of white light.


Been missing a while... Back again smile
Re: aluminium welder wanted [Re: dan0h] #450407
8th Dec 2010 4:17pm
8th Dec 2010 4:17pm
Joined: Jul 2008
Posts: 13,588
Birkenhead
diggingdeeper Offline

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diggingdeeper  Offline

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Birkenhead
Any form of aluminium welding is very specialised, and as Danoh says, an alloy can be even more specialised.

The idea of an amateur or even a steel welder attempting an aluminium job is a farce.


The further you are down the pay scale, the more 'essential' you are when the s--- hits the fan... Sue Farbysmith 2020

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Re: aluminium welder wanted [Re: diggingdeeper] #450410
8th Dec 2010 5:00pm
8th Dec 2010 5:00pm
Joined: Dec 2003
Posts: 5,683
Bebington, Wirral
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DavidB Offline
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DavidB  Offline
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Bebington, Wirral
Get aluminium wire for mig. I've never tried it but it's more delicate than steel.


"C20 LET bang"
Re: aluminium welder wanted [Re: markeee] #450411
8th Dec 2010 5:03pm
8th Dec 2010 5:03pm
Joined: Sep 2009
Posts: 110
new ferry
F
fabby Offline
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fabby  Offline
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new ferry
do you have picture

Re: aluminium welder wanted [Re: fabby] #450474
8th Dec 2010 8:09pm
8th Dec 2010 8:09pm
Joined: Aug 2010
Posts: 309
Wallasey
dan0h Offline

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dan0h  Offline

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Wallasey
To reiterate DD's comments - Ally welding is about as complex as its gets, for something that you'll be putting a lot of load into, the material needs to be immaculately clean with no impurities or dirt. Chemical cleaning would be recommended.

If its an expensive enough frame to warrant the repair, its probably an exotic enough alloy to not really be a feasible weld.


Been missing a while... Back again smile
Re: aluminium welder wanted [Re: dan0h] #450519
8th Dec 2010 10:05pm
8th Dec 2010 10:05pm
Joined: Jun 2005
Posts: 2,163
wirral
M
markeee Offline OP
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markeee  Offline OP
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Joined: Jun 2005
Posts: 2,163
wirral
dont know what or where to go as it was a 2k bike !

[Linked Image]

[Linked Image]



Re: aluminium welder wanted [Re: markeee] #450537
8th Dec 2010 10:53pm
8th Dec 2010 10:53pm
Joined: Mar 2010
Posts: 851
Wirral
Nigel Offline

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Nigel  Offline

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Posts: 851
Wirral
Originally Posted by markeee
dont know what or where to go as it was a 2k bike !

[Linked Image]

[Linked Image]


Try AMF engineering on the croft bussiness park Brombourough 0151 346 1166. They always used to be able to weld Ally, I think they still do.


O give thanks unto the LORD; for he is good; for his mercy endureth for ever ...
Re: aluminium welder wanted [Re: Nigel] #450552
8th Dec 2010 11:47pm
8th Dec 2010 11:47pm
Joined: Aug 2010
Posts: 309
Wallasey
dan0h Offline

Old Hand
dan0h  Offline

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Posts: 309
Wallasey
Cripes. Full marks for breaking it there though. Good effort! It'll need all that paint stripping off for a start.

Do you not think you'd be better off ripping all the good stuff off and buying a new frame? I can't see you'll ever get a structurally sound repair so close to that pivot.

-> http://www.chainreactioncycles.com/Categories.aspx?CategoryID=625


Been missing a while... Back again smile
Re: aluminium welder wanted [Re: dan0h] #450558
8th Dec 2010 11:58pm
8th Dec 2010 11:58pm
Joined: Aug 2010
Posts: 309
Wallasey
dan0h Offline

Old Hand
dan0h  Offline

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Joined: Aug 2010
Posts: 309
Wallasey
Heres a suggestion (far from ideal) -

1. Drill each end of the crack out with a 3mm drill to stop it spreading.

2. De-tension the rear shock and remove the pivot.

3. Get yourself a good quality seat post, cut the top off so its merely a tube with no right angle, drop it (or force it) down the tube overlapping the crack, then drill it all the way through above and below the crack to bolt it in place.

Its a nasty fix, but it might save you a frame and a lot of very invasive welding, that will ruin all your paint and probably distort the frame.

Sympathy to you bud. Nasty.

EDIT: By the look of it though, the bosses that mount the pivot and top tube may well interfere with the consistency of the seat post, so a tube may not go all the way down it - worth a look though.

Last edited by dan0h; 9th Dec 2010 12:00am. Reason: Re-think

Been missing a while... Back again smile
Re: aluminium welder wanted [Re: dan0h] #450563
9th Dec 2010 12:28am
9th Dec 2010 12:28am
Joined: Apr 2006
Posts: 2,367
Prenton
MrPhil Offline
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MrPhil  Offline
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Posts: 2,367
Prenton
To be honest even if you did weld it i'd say in 12 months it will be back.

dan's suggestion with a seat post down it is a good idea. get an enineering firm to turn a solid piece in a transition fit with M8 female thread in one end so a stud bar can aid fitment to the correct depth.

Drill the frame in 4 points (2 top and 2 bottom) so you can pool weld from frame to boss inside the frame.

Then repair the original split. This will stop the frame twistin from the heat.

Try TSW engineering in Brom, maybe get it done as a forgeiner.


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