Ultrasonic metal welding machines are no strangers to friends who have been engaged in the welding industry for many years, but friends who have just contacted this industry may not know much about it. Now, the Altrasonic Knowledge Class will explain the relevant knowledge.
1. The origin of ultrasonic metal welding machine
Ultrasonic metal welding was discovered by chance in the 1930s. At the time, when the current spot welding electrode was added to the ultrasonic vibration test, it was found that the current could not be welded, and the ultrasonic metal cold welding technology was developed. It is similar to friction welding, but with the difference that the ultrasonic welding time is short and the temperature is lower than recrystallization; it is not the same as the pressure welding because the applied static pressure is much smaller than the pressure welding. It is generally believed that in the initial stage of the ultrasonic welding process, the oxide is tangentially vibrated out of the metal surface, and the protruding portion of the rough surface generates repeated micro-welding and destruction processes to increase the contact area and simultaneously increase the temperature of the soldering zone. High, plastic deformation occurs at the interface of the weldment. In this way, under the action of the contact pressure, the solder joints are formed when they approach each other to a distance at which the atomic attraction can act. The welding time is too long, or the ultrasonic amplitude is too large, so that the welding strength is reduced or even destroyed.
Ultrasonic metal welding is to transmit tens of thousands of high-frequency vibration waves per second to the surface of two metal workpieces to be welded, and then apply a certain pressure to make the metal surfaces rub against each other to form a fusion between the molecular layers to achieve the goal of welding.
Contact Person: Ms. Hogo Lv