Hand held ultrasonic welding gun (referred to as ultrasonic welding gun), also known as ultrasonic spot welding machine, can be used for the welding of thermoplastic materials. According to different welding processes, the welding head can be replaced for riveting, spot welding, embedding, cutting, etc. Ultrasonic welding is a fast, clean and effective assembly process, which is used to assemble and process thermoplastic parts and some synthetic components. It is an advanced production and assembly technology.