Butt welding machine and butt welder machine According to the working principle of butt welding machines, butt welding processes can be divided into two types: resistance butt welding and flash butt welding: Resistance butt welding is the process of heating the end joints of steel bars to a plastic state, cutting off the power supply, and then heating them to achieve a plastic connection. This welding process is prone to oxidation and slag inclusion at the joint area, and requires the cross-section of the steel bar to be smooth and flat. At the same time, it consumes a lot of electricity during welding and requires high welding machine power, so it is rarely used. Flash butt welding refers to the process of spraying molten metal particles from the joint of the steel bar end during welding, presenting sparks (i.e. flash). At the same time as molten metal is sprayed out, oxides and slag inclusions are also carried out, which improves the quality of welded joints and is widely used, especially for the butt joint of low-carbon steel and low alloy steel. 2. The following precautions should be taken when using a butt welding machine: Adjust the distance between the two jaws. When turning the adjustment screw to make the control lever at the left limit, the distance between the jaws should be the difference between the total extension length and extrusion amount of the two welded parts.