The components of ultrasonic spot welding machine can be mainly divided into: generator, pneumatic part and program control part and transducer and other parts. The main work of the generator is to transform the power supply with power frequency of 50Hz into high frequency (20KHZ) high voltage wave through the electronic circuit. Pneumatic part of the main work is in the process of processing to complete the pressure and pressure, such as pressure work this task. Program control part to ensure the control of the whole machine workflow, and then achieve synchronous processing effect. The task of the transducer part is to further convert the high voltage wave generated by the generator into mechanical vibration, and then through transmission, amplification to reach the processing surface.

The welding principle of the ultrasonic metal spot welder is to convert the 50/60 hz current into 15,20 kilohertz electrical energy through the ultrasonic generator. The converted high frequency electrical energy is then converted again into mechanical motion of the same frequency through the transducer, and the mechanical motion is then transmitted to the welding head of the ultrasonic welder through a set of amplitudemodulator equipment that can change its amplitude. The welding head then receives the vibration and transmits the energy to the joint of the waiting part. In this area, the energy of the vibration is further converted into heat energy by means of friction and vibration to melt the plastic. When the vibration stops, the transient pressure maintained on the workpiece causes the two welds to fuse together in the form of molecular links. Generally our welding time is not more than 1 second, the strength of the welding can be compared with the body of the United States. Ultrasound is not only used to weld hard thermoplastic plastics, but also to process fabrics and films. A complete set of ultrasonic welding system its main components: including ultrasonic generator and mold and frame.