Experimental investigation on the surface integrity in machining for Si3N4 engineering ceramics Online publication date: Mon, 31-Mar-2014
by Juntao Jing; Hong Zhao; Yunfeng Liu; Xiaoshuang Rao
International Journal of Nanomanufacturing (IJNM), Vol. 9, No. 1, 2013
Abstract: Conventional grinding and rotary ultrasonic grinding machining (RUGM) are applied in precision machining for Si3N4 engineering ceramics mostly. The surface integrity is of great difference with different processing operation. In the paper, the differences of surface integrity by the two machining methods were investigated. The comprehensive evaluation for surface integrity parameters of surface microstructure flaws and mechanical properties was investigated. The surface roughness, surface edge-chipping and surface residual stresses were observed and detected. The experiments results were analysed and discussed based on the material removal process, the motion trail of diamond grits, cutting force and tool wear for the different machining methods. The results show that the surface roughness and the residual stress for RUGM are worse than that for conventional grinding, since the effect of indentation fracture is more notable. However, the scope of edge-chipping is smaller for RUGM than that for conventional grinding due to lower cutting force.
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