Ultrasonic cutting technology widely applied in lightweight structures: Nowadays, many industries view weight reduction as a driving force for innovation. This primarily includes automotive technology, aerospace technology, and medical technology. Ultrasonic cutting provides good prerequisites for processing materials that are increasingly used in lightweight structures. Today, effective cutting of different materials can be achieved through interchangeable blades, such as fiberglass or carbon fiber fabrics, foam materials, leather, synthetic leather, rubber, thick cardboard, or paper. The frequency of ultrasound exceeds the hearing threshold, approximately above 20 kHz. The frequency used for cutting ranges from 20 kHz to 30 kHz. An ultrasonic wave is generated by a piezoelectric transducer that vibrates the blade at high frequency, producing a strong effect during resonance and requiring relatively low power. Therefore, when the thermal load of the environment is low, the cut slices are very neat. There is no need to worry about product adhesion on the blade. Furthermore, this process has other advantages, making it particularly suitable for cutting materials used in lightweight structures. Compared to mechanical milling, ultrasonic cutting does not produce any material loss. There are no debris; the cutting edges are smooth and clean, so no finishing is required. There is no need for cutting media when performing operations like water jet cutting. The cutting material also remains dry and clean. The cutting depth can be adjusted arbitrarily, and in addition, the noise from ultrasonic cutting is low, eliminating the need for any noise protection measures. Additionally, unlike laser cutting, the surfaces of the cut materials do not need to meet special quality assessment standards; there is no formation of charred cutting edges or combustion gases. Due to its extremely low acquisition and operating costs compared to other processes, ultrasonic cutting has become a practical process required for many lightweight structure applications.