High Quality High Speed Ultrasonic Assisted System For Ceramic Drilling

Ultrasonic assisted drilling (UAD) is a promising method for machining hard, brittle and ductile materials. It is used to manufacture parts with high-precision features, including optical, dental and electronic products. The evaluation of cutting force is very important because it directly affects the power consumption, tool life, dimensional accuracy and surface integrity of the machined parts. The cutting force in UAD is smaller than that in CD. In UAD, the cutting force is directly affected by the cutting conditions (such as ultrasonic frequency and amplitude). In addition, the characteristics of the part material (such as hardness and fracture toughness) will affect the processing behavior. According to the process kinematics, cutting conditions and the physical characteristics of the part materials, different mathematical models have been developed to estimate the UAD cutting force. These models have been verified through experiments. This article discusses the mathematical model of UAD, which is used to predict the effect of cutting conditions on cutting force and metal removal rate.

Ultrasonic assisted drilling technology is a drilling technology with a feed direction of 2-20°. The drill uses high frequency vibration (>20 kHz) to improve processing conditions and productivity.

Ultrasonic vibration can not only reduce the thrust, but also improve the surface quality of the hole. In addition, high-frequency vibration has no significant effect on the dimensional accuracy or microstructure of the borehole.

In the drilling and processing of modern aviation materials such as nickel-based and titanium-based superalloys, there are problems such as tool exit burrs, tool stress, tool surface high temperature, and low machining reliability. Recently, a promising method to overcome these technical limitations is to use ultrasonic assistance, in which high frequency and low amplitude vibrations are superimposed on the movement of the tool. Compared with the roundness, cylindricity, surface roughness and hole size of conventional drilling workpieces, the application of ultrasonic vibration can significantly improve the quality of the hole by more than 60%.

Proper ultrasonic vibration can reduce burr height, drilling force and surface roughness more than conventional drilling. At the same time, in the workpiece vibration system, compared with the tool vibration system, higher surface roughness and greater drilling force are obtained.

The new development of ultrasonic machining technology, such as micro ultrasonic machining, NC Ultrasonic Machining Technology and so on. The research of these technologies promotes our research on new materials, which in turn promotes the development of technology, which makes the continuous development and improvement of ultrasonic machining technology. Ultrasonic machining is not only applied in industry, but also in medicine and life.

Ultrasonic machining not only overcomes the disadvantage that some special materials are not easy to be machined, but also improves the machining accuracy, shortens the machining time and improves the efficiency. And its position in cutting, grinding and finishing is irreplaceable. Therefore, the device is suitable for turning, milling, drilling and grinding of diamond, glass, ceramics, tungsten carbide, titanium alloy and other materials. Compared with other processing methods, it has the advantages of low cost, high precision and no need to change the machine tool.