高精度テクスチャを創生する超音波応用転写加工技術の開発

（基礎的実験）

抄録

Sliding surface in mechanical system is required to move smoothly and stop. Sliding surface can move and stop by giving adequate friction force. Friction force is controlled by developing technology creating small texture on the surface with a few micrometer to a few hundred micrometer interval. If friction force is reduced by applying the technology to large area of sliding surface of airplane, generator and machine tool so on, machining effect is rapidly improved. It is necessary to develop machining technology to create texture with high precision and efficiency. On the other hand, ultrasonic vibration is used in many manufacturing fields. It is well known that surface roughness is improved and reduce stress using ultrasonic vibration. In this study, machining technology creating wear resistant texture on large area sliding surface with high precision and efficiency using ultrasonic vibration during knurling is developed. In this paper, effect of ultrasonic vibration is examined by the fundamental experiment. A horn to amplify ultrasonic vibration is designed and made. Frequency of ultrasonic vibration is measured and it is found that desired frequency is available. In the experiment making a groove on the surface with indenter using 2 dimensional table, pressing force and friction force are measured. Pressing force and friction force are reduced using ultrasonic vibration.