Determination of the Optimal Ball Grinding Parameters for the Bio-Ceramics ZrO2 on a PC-Based Multi-Axis CNC Engraving Machine
The objective of this study is to determine the optimal ball grinding parameters of the bio-ceramics ZrO2 by executing the Taguchi’s L18 orthogonal array experiment, analysis of variation (ANOVA), and the full factorial experiment on a PC-based multi-axis CNC engraving machine. The manufacture of a ZrO2 coping using the optimal ball grinding parameters has also been studied based on a tooth plaster model via reverse engineering technique. The 3D data points of a tooth plaster model were digitized by the developed on-machine measurement system on a PC-based CNC multi-axis engraving machine by integrating a circular triangulation laser probe with the machine and a PC. A CAD model of a coping could then be constructed by Pro/Engineer software, based on the digitized 3D data points. With the help of the PowerMill CAM software, the machining path of a coping has been simulated, and the correspondent NC codes have been generated to fabricate the ZrO2 coping using the determined optimal ball grinding parameters, on the CNC multi-axis engraving machine. The average surface roughness of Ra=0.49 um for the ground ZrO2 ceramics coping could be obtained by utilizing the optimal flat surface grinding parameters.
M. S. J. Hashmi, B. S. Yilbas and S. Naher
F. J. Shiou and J. C. Fang, "Determination of the Optimal Ball Grinding Parameters for the Bio-Ceramics ZrO2 on a PC-Based Multi-Axis CNC Engraving Machine", Advanced Materials Research, Vols. 83-86, pp. 630-636, 2010