Thread: Spot welds and fuel tank mounting

Hi Paul

I have the pages you need copies of, need taking gently through the process of scaning and sending though.

PM me if you want me to do this for you.

No rubber in the joint by the way.

Cheers Arthur

Paul

The broken spot welds . If the particular area is flat , then you can use a industrial adhesive to glue the parts together . They have been doing this in the aircraft industry for many years. Loctite make good adhesives....324 is one.

If you have stress cracks in the panels, then that's different . You can oxy weld the panels together, but you need the correct flux.. its tricky , but it can be done. TIG is OK but you need to use the correct filler rod .. there are various types depending on the content of magnesium or silicon in the base metal.

Mike

You can use pop rivets that are a V shape and when popped up are flush with the surface - when painted over look like the original spot weld.

Garry

Originally Posted by garrycol

You can use pop rivets that are a V shape and when popped up are flush with the surface - when painted over look like the original spot weld.

Garry

that's interesting .... never seen those

Using ordinary solid rivets does work too . You have to find small countersunk head rivets . Again, the aircraft industry uses them. If you carefully drill and countersink the hole, the end result appears to be just like a spot weld. Takes some practice to make it neat though , you peen over the inside and flatten it down .
I was thinking of making a portable hydralic press thing up to squash the rivets down, rather than hitting them .

MIKE

Originally Posted by series1buff

that's interesting .... never seen those

Using ordinary solid rivets does work too . You have to find small countersunk head rivets . Again, the aircraft industry uses them. If you carefully drill and countersink the hole, the end result appears to be just like a spot weld. Takes some practice to make it neat though , you peen over the inside and flatten it down .
I was thinking of making a portable hydralic press thing up to squash the rivets down, rather than hitting them .

MIKE

I think we are actually talking about the same thing except the ones I have used are a pop rivet - instead of a flat underside and a domed top the bottom is a v shape to fit into a countersunk hole - there is a small hole in the middle (sometimes) like a pop rivet but this can easily be filled.

I used steel ones to repair a heater housing on my jag and then soldered over the top so it was not obvious there was a rivet in there.

Bunnings used to sell them but certainly any speciality fastener shop has them.

Garry

Garry

photos?

Digger,

Have a look here :- http://www.aviaquip.com.au/allfast/af9.pdf


Colin

Originally Posted by gromit

Digger,

Have a look here :- http://www.aviaquip.com.au/allfast/af9.pdf


Colin

Thanks I was trying to see a photo of how they look after fitting...couldn't find one..