06-26-2015, 10:45 AM
(06-26-2015, 09:01 AM)Mayhem Wrote: Nice simple job there Ed and you certainly will not blow a hole in that disc. The important part when doing this is keeping the disc perpendicular to the shaft.
Start the weld in the centre of the shaft and then work the weld pool in a circle so it fills the hole. This one is pretty difficult to mess up.
Agreed. I would have no issues using .030" wire on this job. Use a practice piece and treat it like a normal Rosette weld, sometimes called a plug weld. Snip the wire at an angle prior to starting a new puddle to give the current a chance to start the process quicker and will better penetration. Also keep your stickout short, like less than 3/8". Once the puddle starts move in a small circular motion staying on the leading edge of the puddle and moving the puddle to fuse the disc to the rod. It will be pretty easy to get good fusion and penetration on a small item like that so just get in and get out.
(06-26-2015, 09:35 AM)f350ca Wrote: This would be a great excuse to buy a TIG machine Ed.
Not sure about the aluminum behind the disk, it might melt, but probably not with this small a weld.
When plug welding I start on the outside and fill the remaining hole in the middle but on that small a part make a small circle in the middle.
Would be easiest if you can get the rod vertical.
Agreed. If I had access to a TIG welder this would be a great job for that. If this was to come into my shop I would use the TIG process over the MIG. But if MIG is all you have at your disposal then it will work just fine.
Mike.