Int. J. of Nanomanufacturing   »   2006 Vol.1, No.2

 

 

Title: Classification of the acoustic emission signals of rubbing, ploughing and cutting during single grit scratch tests

 

Author: James Griffin, Xun Chen

 

Addresses:
School of Mechanical, Materials and Manufacturing, University of Nottingham, Nottingham NG7 2RD, UK.
School of Mechanical, Materials and Manufacturing, University of Nottingham, Nottingham NG7 2RD, UK

 

Abstract: The material process in grinding involves rubbing, ploughing and cutting. Rubbing and ploughing, which usually occur before or after cutting, essentially mean the energy is being applied less efficiently than cutting. It is therefore important to identify the effects of these different phenomena experienced during grinding. A fundamental investigation has been made with Single Grit (SG) cutting tests. To identify the different phenomena, Acoustic Emission (AE) signals extracted by sensor would give the information relating to the groove profile in terms of material removal and deformation. Each AE signal profile would be accurately measured against the surface profile measurements providing the dimensions of the indented groove made into the aerospace material test pieces. A combination of filters, Short-Time Fourier Transform (STFT), Wavelets Transform (WT), statistical windowing of the WT would provide the principal components for classifying different levels of SG cutting phenomenon. Classification would be obtained from a Neural Network (NN) paradigm.

 

Keywords: single grit scratch; acoustic emission; AE; feature extraction; wavelet transforms; short-time Fourier transforms; STFTs; neural networks; ANNs; nanotechnology; nanomanufacturing; grinding monitoring; single grit cutting; rubbing; ploughing; aerospace materials.

 

DOI: 10.1504/IJNM.2006.012195

 

Int. J. of Nanomanufacturing, 2006 Vol.1, No.2, pp.189 - 209

 

Available online: 28 Jan 2007

 

 

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