Abstract
Brushing with bonded abrasives is a finishing process which can be used for the surface improvement of various materials. Since the machining mechanisms of abrasive brushing processes are still largely unknown and little predating research was done on brushing ceramic workpieces, within the scope of this work technological investigations were carried out on planar workpieces of MgO-PSZ (zirconium dioxide, ZrO2) using brushing tools with bonded grains of polycrystalline diamond. The primary goal was the reduction of grinding-related surface defects under the preservation of surface roughness valleys and workpiece form. Based on microscopy and topography measurements, the grain size sg and the brushing velocity vb were found to have a considerable influence on the processing result. Furthermore, excessive tool wear was observed while brushing ceramics.
Highlights
In order to meet increasing resource and productivity demands, modern technology requires the development of sustainable and responsible manufacturing processes
Brushing with bonded abrasives is a finishing process which can be used to enhance the quality of technical surfaces, primarily by decreasing the surface roughness and removing near-surface defects
This could considerably improve the machining results of ceramic materials with defects such as grooves or pockmarks caused by grinding processes, the finishing of sintered ceramics without preceding grinding treatments is conceivable in order to decrease the substantial machining costs [4]
Summary
In order to meet increasing resource and productivity demands, modern technology requires the development of sustainable and responsible manufacturing processes. This leads to higher expectations in terms of component performance as well as durability [1]. Surface finishing technologies no longer target total roughness reduction, but instead the ability to manufacture specialized surface textures for given tasks, even partially maintaining topography features. This enables, for example, the utilization of existing roughness valleys for lubricant retainment while only removing roughness peaks to further decrease surface friction
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