Ultrasonic Welding Machine Welding Process

Ultrasonic Welding Machine Welding Process

Date:Jan 06, 2021

Ultrasonic welding machine welding process


The ultrasonic welding machine converts the current 50/60Hz electric frequency into 20KHz or 40KHz high-frequency electric energy through a transistor function device, and supplies it to the ultrasonic converter. The converter converts electrical energy into mechanical vibration energy for ultrasonic, and the voltage regulator is responsible for transmitting the converted mechanical energy to the welding head of the ultrasonic welding machine.

During the welding process of the ultrasonic welding machine, one of the workpieces is fixed, and the other workpiece is cyclically vibrated on its surface at a frequency of 20/40kHz, and pressure is applied to the workpieces to form a firm bond between the workpieces, thereby ultrasonic welding The machine achieves the effect of welding.

The ultrasonic welding head directly transmits mechanical vibration energy to an acoustic device that needs to be pressed. The vibration is transmitted to the bonding surface through the welding work piece. The vibration and friction generate heat to melt the plastic. The vibration will stop when the molten material reaches its interface.


Holding the pressure for a short time can make the melt produce a strong molecular bond when the bonding surface is solidified. The entire cycle is usually completed in less than a second, but the welding strength is close to that of a connected material.


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