article will cover basic welding techniques in "stick welding."
welding make a final check and remove consumable material. Remove the cigarette
lighter from you pocket. Check your machine to make sure it's on and adjusted
to the approximate settings. Clean the joint. Clamp the rod in the stinger at
a 45 to 90 degree angle. Warn those around you. Place the rod about two inches
from the work. Adjust your hood so that when you nod your head the hood will fall
over your face.
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the arc using the tip of the rod on the surface using a wrist motion, just like
when you strike a wooden match. When the arc is struck lift the rod about 1/8"
above the base material. If the rod "sticks" snap the stinger backward
from the direction of the work. Become light handed. Practice on scrap pieces.
Stick Welding Techniques
a practice bead. Strike an arc moving the welding rod across the plate at a uniform
speed and at an incline of about 20 degrees in the direction of travel. A right
handed person usually welds from left to right. Steady your elbow against your
body, the table, or the work. Use the free hand as needed to control the stinger.
Run beads that consume the entire rod. Let the arc penetrate the base metal and
deposit the filler metal (from the rod) into the joint.
to strike arcs and run beads across the joint making proper adjustments until
you start and stop as desired, with no problems. No further adjustments should
be needed. Burn the rod down to about 1 and 1/2" from the end. One welding
rod usually produces a weld about 1" long.
continue or to restart the bead:
When you stop there is a "crater."
Chip the slag and re-strike the arc a little bit ahead of the crater and then
run the bead. In time this method will produce uniform welds of high strength
without trapping any slag in the bead that cause defects. At the end of a weld
or when the rod is used up, pause slightly to fill the crater then pull the rod
away. Chip the slag and inspect the weld.
welds are dependent on five techniques: correct amperage setting; correct arc
length; correct rod selection and angle to the work; correct travel speed; and
welding rods that have been stored and maintained properly.
electrodes absorb moisture from the atmosphere, they must be dried in order to
restore the ability to deposit quality welds. Electrodes with too much moisture
cause unexplained cracking, poor operating characteristics, and porosity. If you've
experienced these conditions it usually is due to your storage methods or re-drying
procedures. All electrodes, even those outside of the "stick" category,
must be stored and then dried to the right level to work well. Even a small amount
of moisture in low hydrogen electrodes, for example, can lead to major weld problems
such as internal porosity and weld cracking.
little amperage causes a weak arc that is hard to strike. Too much amperage causes
a large crater, or a flat bead with excessive spatter.
arc that is too short will make the rod stick. Too long and large drops of melted
metal will drip off the rod and it will tend to "blow' and spatter. A long
arc also produces uneven bead with poor penetration.
rod angle affects the penetration. An important welding technique is holding the
rod nearly perpendicular to the joint increase penetration but can cause slag
to get trapped in the weld. Lowering the rod too flat or low lessens the penetration
and causes ripples.
affects the amount of rod deposited and the uniformity of the bead. Correct speed
produces about 1" of weld per rod. Travel too fast and it makes a thin bead
with little penetration. Too slow lets the bead build up with edges that overlap
the base metal. Too slow of travel on thin metal will blow a hole through.
chart for recommended welding rod storage and temperature.
More Welding techniques can be found at http://www.ehow.com/list_7211907_steel-welding-techniques.html