lastcowboy32
Well-known Member
I recently modified the exhaust system on our Jinma 284. To do this, I cut the old muffler off of its mounting flange and then welded a 6" long x 1-3/4" black iron pipe nipple onto the flange in order to make something that I could clamp a stock muffler onto.
Anyway, I ground the end of the pipe so that it had a taper all of the way around and set it on the flange. The pipe is fairly thick. I estimated about 1/8" steel. So, I set my wire-feed welder to high current (it just has a high/low) and the appropriate wire feed speed for 1/8" thick metal.
Boom! First arc blew through the joint instead of tac welding. With a little finagling, I was able to get it tac welded in a couple of spots and proceed to weld the pipe onto the flange.
The thing is, it seemed as though it would blow through if I aimed right at the joint where the taper met the flange. It seemed that I had to aim the wire at a point just above the taper where the pipe was full thickness and then work the "puddle" toward the joint.
Seeing as how the metal was thin right at the joint, due to the taper that I ground on the pipe; should I have started with a lower current and wire feed setting to weld the taper and then made another pass with higher current and wire feed speed?
I'm a little new to welding, so any advice would be appreciated.
Anyway, I ground the end of the pipe so that it had a taper all of the way around and set it on the flange. The pipe is fairly thick. I estimated about 1/8" steel. So, I set my wire-feed welder to high current (it just has a high/low) and the appropriate wire feed speed for 1/8" thick metal.
Boom! First arc blew through the joint instead of tac welding. With a little finagling, I was able to get it tac welded in a couple of spots and proceed to weld the pipe onto the flange.
The thing is, it seemed as though it would blow through if I aimed right at the joint where the taper met the flange. It seemed that I had to aim the wire at a point just above the taper where the pipe was full thickness and then work the "puddle" toward the joint.
Seeing as how the metal was thin right at the joint, due to the taper that I ground on the pipe; should I have started with a lower current and wire feed setting to weld the taper and then made another pass with higher current and wire feed speed?
I'm a little new to welding, so any advice would be appreciated.