Abstract
In this work, machining test was carried out in various machining conditions using ultrasonic vibration capable CNC machine. For work material, alumina ceramic (Al2O3) was used while for tool material diamond electroplated grinding wheel was used. To evaluate ultrasonic vibration effect, grinding test was performed with and without ultrasonic vibration in same machining condition. In ultrasonic mode, ultrasonic vibration of 20 kHz was generated by HSK 63 ultrasonic actuator. On the other hand, grinding forces were measured by KISTLER dynamometer. And an optimal sampling rate for grinding force measurement was obtained by a signal processing and frequency analysis. The surface roughness of the ceramic was also measured by using stylus type surface roughness instrument and atomic force microscope (AFM). Besides, the scanning electron microscope (SEM) was used for observation of surface integrality.
Highlights
Ceramics have been considered as one of the important materials in engineering application due to its outstanding physical and mechanical properties such as high melting temperature, high wear resistant, etc. [1,2,3]
This paper studied the ultrasonic vibration effect of diamond grinding tool on the ceramic machining
The conventional and ultrasonic assisted machining for the alumina ceramic was performed by using the diamond grinding wheel
Summary
Ceramics have been considered as one of the important materials in engineering application due to its outstanding physical and mechanical properties such as high melting temperature, high wear resistant, etc. [1,2,3]. There are some difficulties in machining of the ceramic materials owing to its hard and brittle nature on top of bad uniformity and low reliability, so the ceramics are classified into hard-to-cut materials [4,5] For this reason, ultrasonic assisted machining, which is a hybrid process that combines the material removal mechanism and ultrasonic vibration, has been considered. Ultrasonic assisted machining, which is a hybrid process that combines the material removal mechanism and ultrasonic vibration, has been considered This process can be useful for ceramic machining because an additional axial ultrasonic vibration can lead to reduction in cutting temperature and tool wear while maintaining high surface quality, which cannot be obtained from conventional machining [6,7,8,9,10]. Zhao et al discussed theoretical critical grinding depth based on the ductile removal mechanisms of ultrasonic vibration grinding for the ceram-
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