Type of weld? Consistent flow vrs roll of quarters?

(2011-10-08 14:20:17)

1. mike spring Says: What's the difference between a consistent flow of weld and the roll of quarters type of weld?

2. Pete M Says: I've been involved with welding for over 30 years and never heard the references you speak of.

I suspect that what you really mean to say is what is the difference between "downhill" welding and "uphill" welding.

Downhill welding (consistent flow?) is a faster method of welding used mainly for seal welds and is not a good structrural weld because it results in very low penetration.

In downhill or downhand welding, the rod is pulled away from the puddle and allowed to wash over the joint. This is why it results in low penetration.

Uphill welding, (roll of quarters?) is the gold standard for structural welding and consists of pushing the weld rod into the molten pool and making circular motions to allow for maximum penetration, slowly pulling the rod away from the puddle and consistently tying the weld into the puddle.

3. Renagade WOMBAT Says: What you're taking about is the difference between "weave" techniques, and smooth "stringer" welds. "stringer" is the technical term.

Generally, the only time it is acceptable to "weave" is when you are welding in the vertical-up direction. For welding flat, horizontal, and overhead, and for pipe welds, you should always use stringer welds.

There are many welders out there that will disagree with this and tell you it's OK to weave when you're welding flat or horizontal fillets. There are no practical benefits to weaving in the flat and horizontal whatsoever. Furthermore you risk creating slag inclusions, porosity, and lack-of-fusion defects. every time you rapidly chage speed and direction. Common sense ought to tell you that traveling at a smooth, consistent speed will produce the most consistent weld.

"Stack of dimes" is used to describe TIG welds. That's a side effect of the fact that in TIG the filler wire needs to fed into the weld by hand.

Something else I should mention is some types of filler metals produce an obvious "ripple" appearance in the weld, while others produce a fairly smooth looking weld. This doesn't have anything to do with weld technique, it just depends on the type of filler you're using.

4. Zachary Says: I am a certified welder and to me a roll of quarters weld would mean a c on top of c when welding make the c patterns and a consesteint flow would just be a weld with no movement of the arc just strait on what are you using mig stick arc tig it'll depend on what you use though