Ultrasonic welding is divided into plastic and metal welding processes. Ultrasonic is an efficient, clean and assembly welding process. Plastic welding can achieve moisture-proof, waterproof and airtight effects, and is suitable for plastic, electronics, auto parts, environmental protection, communication equipment, packaging, non-woven fabrics and other industries. Metal welding can achieve small internal resistance, strong welding connection tension, and is mainly used for new energy batteries, automobile harnesses, electrical appliances, electronics, power line terminals, etc.