Analysis of local features of engineering ceramics grinding surface

摘要

The power spectrum shows that the zirconia grinding surface has fractal feature, but the local features (deep valleys) cannot be described by fractal method. The deep valleys affect sealing and lubrication and can be applied to monitor the process and predict the performance of the workpiece. This paper will attempt to analyze the deep valleys. Based on the wavelet transform, the grinding surface profiles of steel and engineering ceramics are compared. It is demonstrated that the deep valleys are common local features of engineering ceramics grinding surface. Taking grinding surface and lapping surface of zirconia as examples, the distributions of deep valleys are analyzed. The surface profiles which are very close to the real ones in amplitude, spacing, asymmetry and bearing are simulated. The surface simulation experiments show that the distributions of deep valleys are accurate. The analysis steps and expression of deep valleys are summarized. (C) 2019 Elsevier Ltd. All rights reserved.