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마할라노비스 거리법을 이용한 절단 품질에 대한 연구

A Study on Cutting Quality Using a Mahalanobis Distance

Journal of the Korean Society for Precision Engineering 2021;38(4):253-260.
Published online: April 1, 2021

1 목포대학교 기계공학과

1 Department of Mechanical Engineering, Mokpo National University

#E-mail: ilsookim@mokpo.ac.kr, TEL: +82-61-454-3455
• Received: July 29, 2020   • Revised: December 28, 2020   • Accepted: February 1, 2021

Copyright © The Korean Society for Precision Engineering

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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A Study on Cutting Quality Using a Mahalanobis Distance
J. Korean Soc. Precis. Eng.. 2021;38(4):253-260.   Published online April 1, 2021
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A Study on Cutting Quality Using a Mahalanobis Distance
Image Image Image Image Image Image Image Image Image
Fig. 1 Experimental setup and specimens
Fig. 2 Flow chart of mahalanobis distance
Fig. 3 MD algorithm based detection waveform procedures
Fig. 4 Transform data group into Mahalanobis space
Fig. 5 Measurement of surface roughness
Fig. 6 Results of surface roughness for plasma cutting process
Fig. 7 Distributions of MD values of training data
Fig. 8 Results of cutting quality using Mahalanobis distance
Fig. 9 Optimization of cutting parameter according to cutting speed
A Study on Cutting Quality Using a Mahalanobis Distance

Chemical composition of base metal

Material C Si Mn P S Cr Ni Cu V
SA516-70 0.186 0.369 1.089 0.018 0.004 0.03 0.01 0.014 0.013

Cutting parameters and their levels

Input parameter Unit Level
Cutting current Amp 20, 30, 40
Cutting speed mm/sec 4.0, 4.5, 5.0
Table 1 Chemical composition of base metal
Table 2 Cutting parameters and their levels