Welding as a joining process
Welding is a process whose aim is to join materials permanently. Physical endurance, experience and precision are very important for a welder. Welding is only seemingly uncomplicated. It is important to choose the right welding method. It is also important to choose the right filler material for the materials to be welded and the time needed for the materials to fuse together is ideally determined.
We can distinguish the following types of welding:
- forward welding
- gas welding
- hybrid welding
- electrical welding
- laser welding
The most common is electric welding, which is also called arc welding, electrode welding or MMA welding. The strength of the welds and economy are the main features of this type of welding. Welding is used in locksmithing and also in artistic blacksmithing.
We use an electric welding machine for welding. An electric arc is produced in the gap between the electrode and the metal object. The resulting temperature is as high as 3000 degrees Celsius. The electrode consists of a coating and a core.
The advantage of electric welding is that there are many possibilities. On the one hand, amateur welding is possible with small equipment. However, in the production-industrial system, specialised welders are used.
Welding methods :
- gas-shielded welding,
- submerged arc welding
- welding with coated electrodes
- non-fusible electrode arc welding
The most popular variants are MIG and MAG, i.e. gas shielded welding. In MIG we weld copper and aluminium. Meanwhile, we use MAG welding for steel materials. We use semi-automatic welding machines. MAG (Metal Active Gas) uses a chemically active gas.
With MAG welding we join high-alloyed, low-alloyed and unalloyed structural steel. MIG welding applies to aluminium or copper, for example. Migomat is used in most areas of the welding industry, including engineering and heavy industry, as well as in the repair sector. Migomat is also used for home and hobby work.