The main types of welding
The main types of welding Non-arc welding is more often called contact welding. In contact welding, the electrodes that supply current are applied directly to the metal that is being welded. A short, but very powerful current discharge (thousands of amperes) is applied through the metal located between the attached electrodes. In this case, fusion is obtained only between the applied electrodes. If the electrodes are located directly opposite each other, then the welded joint is obtained point-wise. Although spot welding is not the only type of contact welding, but it is the most common. Therefore, the concepts of "spot welding" and "contact welding" are often used as synonyms. The voltage of spot portable welding machine is a few volts. Therefore, contact welding is used mainly for bonding sheet metal. For example, in the automotive industry. In construction, electric arc welding has become much more widespread. In electric arc welding, there is a smal