How to deal with surface burns after welding with copper wire butt welding machine?

The furniture tube flash butt welding machine can not only flash butt weld pipes, flat irons, flanges, copper and aluminum rows and auto parts. Its main feature is flash. So what are the stages and functions of flash?

In the flash stage, the power is turned on first and the two end surfaces of the workpiece are slightly contacted to form many contact points. When an electric current passes through the contacts, they melt into a liquid metal lintel connecting the two ends. Due to the extremely high current density in the lintel, the liquid metal in it evaporates and the lintel explodes. As the moving clamp slowly advances, the lintel is continuously produced and exploded. Under the action of metal vapor pressure and electromagnetic force, liquid metal particles are continuously ejected from the interface gap, forming a spark jet, that is, a flash. During the flashing process, the link joint gradually shortens and the temperature of the end also gradually increases. As the temperature of the end increases, the blasting speed of the lintel increases, and the moving clamp stacking speed bubbles must gradually increase. Before the flash process is completed, a liquid metal layer must be formed on the entire end surface, and the metal must reach the plastic deformation temperature at a certain depth.

The main function of the flash is to heat the workpiece, and another important function is to protect the interface quality. Due to the strong oxidation of metal vapor and metal particles produced by lintel blasting, the oxygen content of the gas medium in the interface gap is reduced, and the oxidation ability is reduced, thereby improving the quality of the joint. But the flash must be stable and strong. The so-called stability means that no power interruption or short circuit occurs during the flash process. Breaking the circuit will weaken the protective effect of the welding joint, and the joint will be easily oxidized. A short circuit will cause overburning of the workpiece and cause it to be scrapped. The so-called intense flash means that there are quite a few flashes per unit time.
Lintel blast. The stronger the flash, the less oxygen the gas medium in the interface gap of the weldment contains, the less likely it is that both end surfaces of the joint will be oxidized, and the quality of the joint will be improved.

Wuxi Xinxing Welding Equipment Factory has been engaged in resistance welding for 29 years. Its core technical products include: semi-automatic butt welding machine, pneumatic-flash butt welding machine, multi-strand wire welding machine, foot pedal spot welding machine, pneumatic spot welding machine, medium frequency spot welding machine, row welding machine mesh welding machine, resistance automatic welding machine, energy storage welding machine, copper rod and aluminum rod disc circular welding machine, auto parts spot welding machine, sheet metal spot welding machine, home appliance hardware spot welding machine, small electrical appliances There are more than 300 types of spot welding machines, copper bar copper tube welding machines, nut spot welding machines, stainless steel welding machines, foil strip spot welding machines, aluminum spot welding machines, multi-head spot welding machines, bag cage spot welding machines, mesh welding machines, ton rack welding production lines, automatic resistance welding machines, brazing machines, diffusion welding machines, projection welding machines, seam welding machines, wire and cable optical cable supporting equipment, etc. If you are interested in our welding equipment, please contact us.