Top Gun 351 SWF, Руководство пользователя

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8
Getting Started
WELDING 101
MIG/MAG Welding Technique
For those who have not yet done any welding, the simplest way to commence is to run beads on a piece of scrap plate. Use a mild steel
plate, around 6mm thick and a 3.2mm electrode.
Clean any paint, loose scale or other contaminants from the plate, and set it firmly on the workbench so that welding can be carried out in
the downhand position.
Make sure that the work clamp is making good electrical contact with the work piece, either directly or through the work table.
For light gauge material, always clamp the work lead directly to the job, otherwise a poor circuit may result.
The Welder
Striking An Arc
Place yourself in a comfortable position before beginning to weld. Get a seat of suitable height and do as much work as possible
sitting down comfortably. Don’t hold your body tense. A taut attitude of mind and a tense body will soon make you feel tired.
Relax and you will find that the job becomes much easier. You can add much to your peace of mind by wearing a leather apron and
gauntlets. You won’t be worrying then about being burnt or sparks setting your clothes alight.
Place the work so that the direction of welding is across, rather than to or from your body. The electrode holder lead should be clear of any
obstructions so that you can move your arm freely along as the electrode burns down. If the lead is slung over your shoulder, it allows
greater freedom of movement and takes a lot of weight off your hand.
Be sure the insulation on your cable and electrode holder is not faulty, otherwise you are risking an electric shock.
Practice this on a piece of scrap plate before going on to more exacting work.The easiest welding procedure for the beginner to experiment
with MIG welding is in the flat position. The equipment is capable of flat, vertical and overhead positions.
Two different welding processes are covered in this section (GMAW and FCAW), with the intention of providing the very basic concepts in
using the Mig mode of welding, where a welding gun is hand held, and the electrode (welding wire) is fed into a weld puddle, and the arc is
shielded by an inert welding grade shielding gas or inert welding grade shielding gas mixture.
GAS METAL ARC WELDING (GMAW): This process, also known as MIG welding, CO2 welding, Micro Wire Welding, short arc welding, dip
transfer welding, wire welding etc., is an electric arc welding process which fuses together the parts to be welded by heating them with an
arc between a solid continuous, consumable electrode and the work. Shielding is obtained from an externally supplied welding grade
shielding gas or welding grade shielding gas mixture.
The process is normally applied semi-automatically; however the process may be operated automatically and can be machine operated.
The process can be used to weld thin and fairly thick steels, and some non-ferrous metals in all positions