Ultrasonic Welding Robot
Ultrasonic welding is a process used to join materials, particularly plastics and some metals, by applying high-frequency ultrasonic vibrations (typically between 20 kHz and 40 kHz) to the bonding materials under pressure. This vibration creates localized heat through friction at the joint, causing the materials to melt and bond without the need for external heat or filler materials.
Working Principle
Clamping: Two components are placed and held together tightly. Vibration Transmission: High-frequency sound waves are transmitted through a welding horn (also known as a sonotrode).
Local Heating: The frictional force generated by ultrasonic vibration at the joint generates enough heat to soften or melt the material.
Adhesion: The vibration is stopped, but pressure is maintained to cool the material and solidify into a strong weld.
Suitable materials: Thermoplastics such as ABS, PP, PE, and PVC; thin metals such as aluminum and copper (commonly used in the battery and electronics industries).
Advantages of ultrasonic welding: No adhesives, screws, or fillers are required. The process is very fast, highly accurate, and the surrounding area suffers minimal thermal damage. Suitable for mass production. Applications include automotive plastic part assembly, electronic parts manufacturing, sterile medical packaging (e.g., sealed bags), and face mask manufacturing.
