Ultrasonic machining is also called ultrasonic vibration welding, is the use of ultrasonic vibration tools in liquid containing abrasive materials or dry grinding materials, the impact of grinding material, grinding, hydraulic shock and cavitation erosion, or in a certain direction for the tool or workpiece ultrasonic vibration, or using ultrasonic vibration to the workpiece combined machining method.

In the field of hard and brittle material removal, the use of the power of the tool to remove materials, tool wear is serious, electric machining performance is limited by the electrical conductivity of the workpiece material. The large amount of heat generated in laser processing can easily lead to crack and oxidation on workpiece surface. Ultrasonic processing is non-contact processing, its processing performance does not depend on the electrical conductivity of the material, the cutting heat generated in the process of processing is small, glass, engineering ceramics, silicon crystal, quartz crystal and other hard brittle materials the most effective processing method.

The application of ultrasonic machining process: general refractory materials have high strength steel, composite materials, high temperature alloy, titanium alloy, ceramics, etc., these materials have high hardness, high strength, not easy to wear and tear, it is not easy oxidation, heat resistance, corrosion resistance, etc, in areas such as machinery manufacturing, defense, aviation industry get more and more widely used.