Ultrasonic welding is an efficient and pollution-free connection technology, which is widely used in electronics, automotive, medical equipment and other industries. It generates heat energy on the surface of the object through high-frequency vibration, making the contact surface of the workpiece soft and fused, thus achieving the purpose of connection. What is the minimum thickness of Ultrasonic welding?

First, we need to understand the process of Ultrasonic welding. The operating frequency of Ultrasonic welding is usually between 20kHz and 70kHz. Usually, the corresponding frequency is selected based on the thickness of the material being welded. In general, the minimum thickness of Ultrasonic welding depends on the contact area between the workpiece and the ultrasonic welding head. In practical application, the minimum thickness of Ultrasonic welding is 2mm.

When the thickness of the welded workpiece is less than 2mm, the welding result is not satisfactory. In the process of Ultrasonic welding, the vibration of the welding head will produce shear stress on the surface of the workpiece, making the pressure on the surface of the workpiece increase, which can increase the friction force on the surface of the workpiece, thus increasing the plastic deformation degree of the solder joint. In the case of thinner workpieces, welding head vibration can generate compression waves on the workpiece, easily reaching the material limit, forming cracks or damage.

In addition, different materials have different responses to ultrasound. For materials with different thicknesses, it is necessary to select the appropriate working frequency to make the welding effect better. Therefore, the minimum thickness of Ultrasonic welding needs to be selected in combination with the actual application.

In general, Ultrasonic welding technology has unique advantages, especially in the field of thin wall welding. Although its minimum thickness is 2mm, for thinner metal materials, Ultrasonic welding can achieve fast, efficient and accurate welding, successfully realize product connection and improve production efficiency.