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Justme123
12-01-2010, 10:58 AM
Anyone know where i can
weld a broken aluminium bicycle frame.

chewie
12-01-2010, 11:03 AM
once u weld a bicycle frame, it will not be strong. unless you just ride it around the housing area and you are cycling it slow....

you can go to any welder to do it actually

waga
12-01-2010, 11:13 AM
Direction : start from honda sales n service in usj 1

Go straight (honda will be on yr right) down towards T junction.....turn to your right ...you will be able to see numerous workshops here....drive around n look for shops that have welding service....there have a few here esp. iron gate type...do ask for costing b4 you have him starting work on your bike.

jan tomaswaki
12-01-2010, 11:41 AM
I advise you to buy a new bike,it's pretty dangerous to ride on a re- weld bike.I am advising after clock-in more than 20,000km.

Justme123
12-01-2010, 12:23 PM
Thanks,
fortunately the crack is not within the
triangle of the frame or wheel support.
It is just below the area that support the seat.

Have bought a new bike.
Hope to weld the old one and sell it off cheap.

chewie
12-01-2010, 01:00 PM
once you weld it, i guess no one would like to buy it...seat is also important.. i am sure you do not want ppl or yourself to injured your groin area

Justme123
12-01-2010, 01:31 PM
once you weld it, i guess no one would like to buy it...seat is also important.. i am sure you do not want ppl or yourself to injured your groin areaoops.. hee..hee.. :D
Should the welding fails, the seat and its supporting rod might just fly off.

chewie
12-01-2010, 02:01 PM
yup...and if you do not notice that its being fly off, you will injured a very treasure part of your body.. :D

VeeJay
12-01-2010, 03:01 PM
If the welding is done correctly with quality, it should be safe to ride...speaking from my past welding experience....

mick123
12-01-2010, 04:04 PM
welding aluminium is different from welding steels. if the welder is not qualified or not having the correct welding machine, it is as good as not welding. perhaps you can ask the bicycle shops how much they will take it in on an as-is basis.

Firefly
13-01-2010, 10:03 AM
You cannot simply weld aluminum. The grade of the alloy must be known and a suitable welding rod be used. Using a wrong rod will damage the weld more then repair it.

Suggest you find an alternative to welding.

PM me.

Fabe18
13-01-2010, 10:25 AM
Some aircon repair shop oso have aluminum welding machine... Rim repair specialists also would have the machine.

kwchang
13-01-2010, 11:01 AM
Listen to the comments against welding and go discard the old bike ... for safety reasons. If you go to any of the metal workshops, they would probably apply the same technique like welding iron and steel. Do note that aluminium is a softer metal, very different from iron or steel.

Read this article (http://www.lincolnelectric.com/knowledge/articles/content/alum.asp) about welding aluminium and you will appreciate how much knowledge and preparation is necessary before it can be safely done

Firefly
13-01-2010, 01:03 PM
KWChang, they left out the section of heat treatment to after welded parts. Aircondition aluminum parts are usually of pure aluminum. That makes welding easier as there is no strength requirement after the weld. An Alloy aluminum part will require some form of heat treatment for it to attain the strength.

As for bicycle, the may not even be of the common 6 series (architecture grade) alloy..most likely the 7 series alloy (aircraft grade). Hence you may not even find the welding rods required for it.

Justme123
13-01-2010, 01:26 PM
KWChang, they left out the section of heat treatment to after welded parts. Aircondition aluminum parts are usually of pure aluminum. That makes welding easier as there is no strength requirement after the weld. An Alloy aluminum part will require some form of heat treatment for it to attain the strength.

As for bicycle, the may not even be of the common 6 series (architecture grade) alloy..most likely the 7 series alloy (aircraft grade). Hence you may not even find the welding rods required for it.Looks like I have to give up welding the aluminium parts.
I think i'll cannibalize the parts and use them as spares for the new bike.

Firefly
14-01-2010, 09:32 AM
Think that's the best option.