Shielded metal arc welding (ideal for outdoor work)
Shielded metal arc welding is a welding method that uses a welding rod such as Pocky as an electrode to generate an arc between it and the base metal (metal to be welded). The base metal is melted by the arc heat, and the melted electrodes (welding rods) are fused with the base metal. The electrode itself also serves as a welding rod.
Unlike TIG welding, shield gas is not injected.
The coating agent (flux) applied to the welding rod is decomposed by arc heat to become gas, which protects the welded part and prevents it from oxidizing. This coating (flux) also has the effect of stabilizing the arc. Due to its wind resistance, shielded metal arc welding is mostly used for outdoor work. The slow welding speed is a disadvantage
Shielded metal arc welding (hand rod) is explained in detail in this article.
Semi-automatic welding (ideal for a wide range of welding work)
A welding wire is set in the semi-automatic welding machine, and the welding wire is automatically supplied by the wire supply device. However, the welding work itself is manual, so it is called “semi-automatic”.
In shielded metal arc welding (manual welding), it is necessary to replace the welding rod when the welding rod becomes short, but in semi-automatic welding, this is not necessary, so work efficiency is good. Therefore, it is suitable for a wide range of work such as construction sites and maintenance of large vehicles.
Even if you say semi-automatic welding in a bite, it can be further classified according to the type of gas used / not used / gas.