AGM IW-120, Оригинальное руководство пользователя

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It is preferable to weld on work in the flat or horizontal position. However, when forced to
weld in vertical or overhead positions it is helpful to reduce the amperage from that used
when welding horizontally. Best welding results are achieved by maintaining a short arc,
moving the electrode at a uniform speed, and feeding the electrode downward at a
constant speed as it melts.
More specific information on the stick welding procedure is provided in the following
sections.
No one can learn to weld simply by reading about it .Skill comes only with practice. The
following pages will help the inexperienced welder to understand welding and develop his
skill.
The operator's knowledge of arc welding must go beyond the arc itself .He must known
how to control the arc, and this requires a knowledge of welding circuit and the equipment
that provides the electric current used in the arc. The welding circuit begins where the
electrode cable is attached to the welding machine and ends where the work cable is
attached to the welding machine. Current flows through the electrode cable to the
electrode holder, through the electrode and across the arc. On the work side of the arc, the
current flows through base metal to the work cable and back to the welding machine .the
circuit must be compete for the current to flow. To weld, the work clamp must be tightly
connected to clean base metal .Remove paint, rust ,etc. as necessary to get a good
connection .Connect the work clamp as close as possible to the area you wish to weld.
Avoid the welding circuit to pass through hinges, bearings, electronic components or
similar devices that can be damaged.
The electric arc is made between the work and the tip end of a small metal wire, the
electrode, which is clamped in a holder and the holder is held by the welder. A gap is made
in the welding circuit by holding the tip of the electrode 1.5-2.0mm away from the work or
base metal being welded. The electric arc is established in this gap and is held and moved
along the joint to be welded, melting the metal as it is moved.
Arc welding is manual skill requiring a steady hand, good physical condition, and good
eyesight the operator controls the welding arc and therefore, the quality of the weld made.
Figure 1.