SMAW (shielded metal arc welding) is welding process which source of heat coming from the electrical current. This heat is the result of the conversion of electric power that is converted into heat when the electrode is attached to the base metal. With the meeting between the electrode and the base metal will cause ion exchange.
The Shielded Metal Arc Welding process has three type of polarity, the first is Alternating Current (AC), Direct Current Revers Polarity (DCRP), and Direct Current Straight Polarity (DCSP). For machine type, SMAW has three kinds current that is machine direct current (DC), the machine with alternating current (AC), machines with a combination of direct current (DC) and alternating current (AC). You can look processing melt the electrode in this picture.
Shielded metal arc welding machine parts and procedure:
SMAW machine parts:
Shielded Metal Arc Welding machine is the main parts of this process, because without machine certainly, we can not do welding process.
- Electrode Cable
The function Electrode cable connects the current from welding machine to electrode which we use to weld the base metal.
- Massa Cable
Massa Cable has a function for connecting current from machine to base metal, after that base metal and electrode touch then will welding process is happening.
- Welding Power Source
Have to function for supply current from electrical source to welding machine.
- Current Control
For control current output which uses for the welding process, big or little the current dependent form type or thickness of material (base metal).
- Electrode Holder
For hold the electrode so we can do welding process easily. Otherside holder too has a function for an electric current to the electrodes.
- Earth Cramp
To connect the machine to the base metal.
For on or off the welding machine.
As a filler metal, after the welding process finish then the electrode will change be weld metal. The electrode has a flux which the function is to protect steel melting when the welding process takes place.
SMAW Welding can use for anything weld joint or welding position. Otherside we use this process for underwater welding, but the tools must be complete again suitable for underwater welding procedure. If we do not follow the procedure then can cause our accident, for example, electric shock or other accident types.
See: GTAW Welding Machine
Advantages and Disadvantages SMAW Welding:
Advantages Shielded Metal Arc Welding:
- Can use to welding for all type joint.
- SMAW can use all welding position.
- We do not need gas for shielding the molten weld metal.
- Do not need much preparation before welding.
Disadvantages Shielded Metal Arc Welding:
- We must clean the slag after welding process is done.
- There are spatters.
- One electrode just can produce weld metal around ten to fifteen centimeters.
- The speed can not fast because we must change the electrode.
An explanation what is Shielded Metal Arc Welding and process the above we can from a variety of sources, if you want to add captions please provide in the comments field or existing contacts on this page.