difficult joint

[BrokenBiker]

just couldnt get a good run this morning so have stopped for a cuppa and some advice

im running a 2.5mm rod at 60ish amps as they seem to run lovely set like this (bead looks good and easy to control, slag falls off at the end) and trying to weld what i would call a lap joint. strength is not an issue but i welded a tab on for the earth clamp and that doesnt want to budge when i tried to straighten it up a bit with a hammer so im happy its going to be strong enough, plus all the weight is going to be below the weld and not acting on it at all anyway

i have cut the top off a propane bottle, and then cut the stand ring off the bottom of another, i have then placed the bottom of the bottle with no stand in the top of the other one and wish to weld it up so i can have a burner section on top and a wood store on the bottom.

i have tacked it up ok, its got 8 tacks on equally spaced and they all have good fusion, no problems with that at all... it has good fit up all around too. when i started welding it up i found the bottom lip was just melting away as soon as i got about an inch into the weld, so i tried focussing the arc on the top piece but the same thing is happening.

i am welding in the horizontal position as its the easiest position to get everything lined up.

would i be better off trying to position it so its flat (rod coming in from the top) rather than horizontal?

 

[gaz1]

i found laying the bottles on the floor easier to weld when joining them up using mig welder

however on the rocket stove we use the method of using a thin bar or steel to join the rims before we use the sealant and rope

 

[BrokenBiker]

i have just tried laying them flat and its easier, still not great although i think that could be me more than anything, i got some good runs and a few poor ones, but it needs a bit more to fill up the valley anyway and its all going to be ground flush before paint

 

[gaz1]

brokenbiker try and remember to use a cool tray underneath your stove it will got hottish but you dont want the wood to set fire underneath the stove from the radiated heat going down hence the reason for a cool tray

I still like the idea of the rocket stove great using very little wood and get loads of heat of it for a builders bucket of wood

 

[Johnseat]

Get a picture posted up of the project then, I'm interested in something like this for my man cave.

 

[gordon stephenson]

Put a layer of sand in the bottom to protect the metal and insulate the wood store from the heat.

 

[BrokenBiker]

Put a layer of sand in the bottom to protect the metal and insulate the wood store from the heat.

i was planning on that...i had to cut the bottom few inches off the top bottle, invert it, and weld it back on so it didnt stick so far into the bottom part, so was going to level it with sand

Get a picture posted up of the project then, I'm interested in something like this for my man cave.

i havent taken any so far but can get some tomorrow if you want...at the moment it just looks like a 47kg bottle though lol

 

[Johnseat]

i was planning on that...i had to cut the bottom few inches off the top bottle, invert it, and weld it back on so it didnt stick so far into the bottom part, so was going to level it with sand


i havent taken any so far but can get some tomorrow if you want...at the moment it just looks like a 47kg bottle though lol

Hahaha okay doke.
Get one up when you've made progress so I can see what it'll look like.
It's either a stove or an old oil burner I'll be making for my new shed.

 

[gaz1]

I went for the clean burn wood stoves and personally id advise anyone to build a clean burn system maybe a little more work but its worth it

less obnoxious smell, does burn better

I did an experiment with a 2 way burner both systems use secondary air

http://www.mig-welding.co.uk/forum/threads/first-build-rocket-burner.45497/#post-778101