What is Ultrasonic Welding: Working Principles, Applications and Benefits

What is Ultrasonic Welding: Working Principle, Applications and Advantages​

Ultrasonic welding is a technology that uses high-frequency mechanical vibrations (usually 15-70kHz) to achieve material joining. Its working principle is that the horn transmits vibration energy to the contact surface of the workpieces to be welded, causing local high-temperature plastic deformation, which forms a strong bond under pressure without additional solder.​

This technology is widely used in electronics, automotive, medical and other fields, such as lithium battery tab welding, automotive wire harness connection, mask earband welding, etc.​

Its advantages include: fast welding speed (usually milliseconds to seconds), high joint strength, small heat-affected zone, environmental protection without smoke and dust, and reliable joining of dissimilar materials (such as metal and plastic).