Tried everything but couldn't eliminate it. Maybe cant eliminate it in such close corners, don't know. Material is mild steel 2" X 3/8" about 18" on each side. Using 5/32 7018.
Trailblazer 302
Hobart Stickmate AC/DC
Lincoln SP 135 T
Smith torch
Spoolmatic 30A
I agree with the AC comment. Also, in what order were the parts welded? All inner sections placed and tacked before main welds were made (thus in tight quarters)? If so, might it have been better to mark the outside where the inner ends would go and starting near the two outside corners, fully weld each one in turn so only the last center piece had less room?
What do these have to support, just people, lawn equipment wheels, automobiles/trucks, or nothing? Where are they designed to go; triangular is not common.
The triangle shape was welded up first and then the bars were set in from the outsides and progress toward center alternating from one side to the other. Tried AC a little but I have trouble with 7018 on AC and didn't have any AC7018.
By the way it's a grate for the firebox in a Amish wood heater for a greenhouse so I got lucky as it didn't have to look pretty.
Trailblazer 302
Hobart Stickmate AC/DC
Lincoln SP 135 T
Smith torch
Spoolmatic 30A
there is something about the area on the inside of flange of i-beam, about 1/4 - 1/3 of the way from the web, too the outer edge of flange, that sometimes i gives arc blow. so its not uncommon to get arc blow in that short stretch, while welding in a stiffener. switching to ac, ususually isnt an option
there is something about the area on the inside of flange of i-beam, about 1/4 - 1/3 of the way from the web, too the outer edge of flange, that sometimes i gives arc blow. so its not uncommon to get arc blow in that short stretch, while welding in a stiffener. switching to ac, ususually isnt an option
Sometimes changing the position of the ground cable (or adding a short jumper so the current comes over different paths) can reduce the "arc blow". On DC, the arc is magnetized so reacts to the magnetic field set up by the current beyond the arc. Currents coming different ways can set up competing fields that oppose (neutralize) each other.
Sometimes changing the position of the ground cable (or adding a short jumper so the current comes over different paths) can reduce the "arc blow". On DC, the arc is magnetized so reacts to the magnetic field set up by the current beyond the arc. Currents coming different ways can set up competing fields that oppose (neutralize) each other.
yes, im understanding on that, and reversing directions. but the area is like the bermuda triangle, sometimes
Sometimes, no matter what you try to do..........arc blow will defeat you.
The arc simply went where it wanted.
Changed over to AC, and 7018AC for these particular welds...................
Although the AC variety is prone to surface porosity, it can be successfully run at fairly high amps, with the rod literally shoved into the metal. I like looking at my old welds before my eyesight went completely South. (still no response from the eye doc appointment request)
Sometimes, no matter what you try to do..........arc blow will defeat you.
The arc simply went where it wanted.
Changed over to AC, and 7018AC for these particular welds...................
Although the AC variety is prone to surface porosity, it can be successfully run at fairly high amps, with the rod literally shoved into the metal. I like looking at my old welds before my eyesight went completely South. (still no response from the eye doc appointment request)
I wonder what would happen if a degaussing coil were put just behind that metal while welding with DC?
I have burn a lot with E7018 rod
I have never had arc blow but is was mostly with AC .
Very interesting photo.
Dave
Originally Posted by farmersammm
Sometimes, no matter what you try to do..........arc blow will defeat you.
The arc simply went where it wanted.
Changed over to AC, and 7018AC for these particular welds...................
Although the AC variety is prone to surface porosity, it can be successfully run at fairly high amps, with the rod literally shoved into the metal. I like looking at my old welds before my eyesight went completely South. (still no response from the eye doc appointment request)
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Originally Posted by shortarc
The arc simply went where it wanted.
Although the AC variety is prone to surface porosity, it can be successfully run at fairly high amps, with the rod literally shoved into the metal. I like looking at my old welds before my eyesight went completely South. (still no response from the eye doc appointment request)
