by daniel cole
(moline , il)
whats a good way to get a good fillet and cap on a pipe in the 6g position without moving the pipe.
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It really depends on the process...whether its tig , or stick, or mig or combination .
watch this video and it might help if its tig you are wondering about.
by Dean
(Or)
What formula do i use to set the voltage and also the wire feed speed, i am learning the machine but i don't know how to adjust when i have to weld vertical, can u help? I am mostly welding. 3/8", 1/2", some 5/8", track hoe bucket rebuilds and miscellaneous.
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One method to find good mig welding settings using a millermatic 251 is to use the chart on the inside of the panel door.
In my opinion, these settings are across the board about 10 % higher on wire speed than what I prefer....but its a good starting point.
for vertical welds, I find that choosing about 2 thicknesses less than what I am welding gives a pretty good setting ( minus the 10% )
The miller weld calculator seems to be about the same as the charts they use for the millermatic welders..
http://www.millerwelds.com/resources/calculators/mig_solid_amperage_calculator.php
is a good resource. but it is intended to be used for single pass horizontal fillet welds and the settings are pretty hot for anything but flat , horizontal, or downhill.
so what you can do for vertical uphill settings is select the thickness for about half of what you are welding and then use the weld calculator
for example, half of 3/8" is 3/16" so the settings for 3/16" using 75/25 with .035" bare wire are 18-19 volts and 320-340 ipm...that should work pretty well for vertical uphill on 3/8"...give or take. you may need 19-20 volts but its a good start.
once you get a good match of voltage and wire speed,, if its too hot or cold , just increase or decrease both voltage and wire to suit the heat you need.
I am studying for the B31.3 CWB weld inspector test, this is a very in depth code, I am wondering if any one that has taken it can give me some advise.
Bob
How to weld 16 gauge steel with hard wire
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thats a wide open question but here goes...
well the best gas to use with bare wire for 16 ga is probably 75/25 ar/co2
but co2 would work also.
downhill all the vertical joints and in fact any joint you can position to where it is slightly downhill will weld smoother.
.030" or .025" wire works best but .035" is still in the ball park and will work fine if you set it right.
depending on the machine, the voltage will probably be around 16-18
wire feed speed will depend on wire size used.
flow on the mig gun will also depend on the size of the nozzle and type of gas used but 25 cfh will probably get you going.
most mig welders these days come with some type of chart inside the wire spool panel.
those settings are usually a pretty good place to start.
er70s6 is the most common wire but er70s3 or 4 is fine also.
you may find that short runs of only a few inches help prevent warping.
what code book is mostly used for the structural and destructive examinations of structural certifications?
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i think you might be referring to AWS B4.0
standard methods for mechanical testing of welds
by wingnut
(sc)
can i hook up my miller hf251d-1 to my lincoln ranger 250 dc machine and still be able to tig aluminum, although the 250 is a strait dc machine, the hf251d-1 has a 115v ac power supply
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the short answer is no. there might be a few aluminum welds you could make using DC but its few and far between .
you really need AC with high freq.
by karen
(berryville va )
i just relocated here in the Winchester area and need a job l have 30 yrs experience in welding alum. and stainless steel. Also have quality control experience. Im bored out of my mind someone send me some leads
mskarenroberts@yahoo.com
