Electric welding machine uses the high-temperature arc generated by the instantaneous short circuit between the positive and negative poles to melt the solder on the welding electrode and the material being welded, so as to combine the contact object. Its structure is very simple, it is a high-power transformer. Electric welding machines can generally be divided into two types based on the type of output power supply, one is AC power supply and the other is DC power supply. They use the principle of inductance, which produces significant voltage changes when connected and disconnected. They use the high-voltage arc generated by the instantaneous short circuit between the positive and negative poles to melt the solder on the welding electrode, enabling them to achieve atomic bonding. 1、 Advantages of electric welding machines: Electric welding machines use electrical energy to instantly convert electrical energy into thermal energy. Electricity is very common, and electric welding machines are suitable for working in dry environments without too many requirements. Due to their small size, simple operation, convenient use, fast speed, and strong welding seams after welding, they are widely used in various fields, especially for parts with high strength requirements, The same metal material can be permanently connected in an instant (or different metals can be connected, but with different welding methods). After heat treatment, the weld seam has the same strength as the base material, and the sealing is good. This solves the problem of sealing and strength for the manufacturing of gas and liquid storage containers. As shown in Figure 1. 2、 Disadvantages of electric welding machines: During use, a certain magnetic field is generated around the welding machine, and when the arc burns, radiation is generated to the surrounding area. The arc light contains infrared, ultraviolet, and other harmful substances such as metal vapor and smoke. Therefore, sufficient protective measures must be taken during operation. Welding is not suitable for the welding of high carbon steel. Due to processes such as crystallization, segregation, and oxidation of the weld metal, the welding performance of high carbon steel is poor, and it is easy to crack after welding, resulting in hot and cold cracks. Low carbon steel has good welding performance, but proper operation is also necessary during the process. Rust removal and cleaning are relatively cumbersome, and sometimes there may be defects such as slag inclusion, cracks, pores, and undercuts in the weld seam. However, proper operation can reduce the occurrence of defects
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