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Effect of Coating Thickness on Abrasion and Cutting Performance of NCD-Coated Ball Endmills on Graphite Machining

Nano-crystalline diamond (NCD) coating to improve the performance of cutting tools, as the coating thickness varies, the cutting performance and lifespan of the tool varies because the radius of its cutting edge and coating surface roughness are altered. Therefore, an in-depth analysis on the impact...

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Autores principales: Lee, Hyeonhwa, Kim, Jinsoo, Lee, Sungcheul, Park, Jongeun, Park, Jeongyeon, Kim, Jongsu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10054475/
https://www.ncbi.nlm.nih.gov/pubmed/36985071
http://dx.doi.org/10.3390/mi14030664
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author Lee, Hyeonhwa
Kim, Jinsoo
Lee, Sungcheul
Park, Jongeun
Park, Jeongyeon
Kim, Jongsu
author_facet Lee, Hyeonhwa
Kim, Jinsoo
Lee, Sungcheul
Park, Jongeun
Park, Jeongyeon
Kim, Jongsu
author_sort Lee, Hyeonhwa
collection PubMed
description Nano-crystalline diamond (NCD) coating to improve the performance of cutting tools, as the coating thickness varies, the cutting performance and lifespan of the tool varies because the radius of its cutting edge and coating surface roughness are altered. Therefore, an in-depth analysis on the impact of the variations in coating thickness on the cutting tool abrasion and quality of machined surface is necessary. In this study, two NCD ball endmills were coated with 8 and 12 μm thicknesses, and the tool abrasion and roughness of the machined plane were observed after milling. Furthermore, the morphology of the coated surface and abrased cutting edge were observed using a 3D confocal microscope. Consequently, we observed that individual nodules were formed on the continuous aggregates as the coating thickness increased, which increased the coated surface roughness. The two damage modes of the aggregation determined the dominant abrasion that occurred on the cutting edges of both types of coating thicknesses. Delamination and crater wear caused a sharp increase in the roughness of the machined surface. In summary, the increase in coating thickness delayed the delamination of the coating but increased the roughness of the cutting edge, which reduced the machined surface roughness.
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spelling pubmed-100544752023-03-30 Effect of Coating Thickness on Abrasion and Cutting Performance of NCD-Coated Ball Endmills on Graphite Machining Lee, Hyeonhwa Kim, Jinsoo Lee, Sungcheul Park, Jongeun Park, Jeongyeon Kim, Jongsu Micromachines (Basel) Article Nano-crystalline diamond (NCD) coating to improve the performance of cutting tools, as the coating thickness varies, the cutting performance and lifespan of the tool varies because the radius of its cutting edge and coating surface roughness are altered. Therefore, an in-depth analysis on the impact of the variations in coating thickness on the cutting tool abrasion and quality of machined surface is necessary. In this study, two NCD ball endmills were coated with 8 and 12 μm thicknesses, and the tool abrasion and roughness of the machined plane were observed after milling. Furthermore, the morphology of the coated surface and abrased cutting edge were observed using a 3D confocal microscope. Consequently, we observed that individual nodules were formed on the continuous aggregates as the coating thickness increased, which increased the coated surface roughness. The two damage modes of the aggregation determined the dominant abrasion that occurred on the cutting edges of both types of coating thicknesses. Delamination and crater wear caused a sharp increase in the roughness of the machined surface. In summary, the increase in coating thickness delayed the delamination of the coating but increased the roughness of the cutting edge, which reduced the machined surface roughness. MDPI 2023-03-16 /pmc/articles/PMC10054475/ /pubmed/36985071 http://dx.doi.org/10.3390/mi14030664 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Lee, Hyeonhwa
Kim, Jinsoo
Lee, Sungcheul
Park, Jongeun
Park, Jeongyeon
Kim, Jongsu
Effect of Coating Thickness on Abrasion and Cutting Performance of NCD-Coated Ball Endmills on Graphite Machining
title Effect of Coating Thickness on Abrasion and Cutting Performance of NCD-Coated Ball Endmills on Graphite Machining
title_full Effect of Coating Thickness on Abrasion and Cutting Performance of NCD-Coated Ball Endmills on Graphite Machining
title_fullStr Effect of Coating Thickness on Abrasion and Cutting Performance of NCD-Coated Ball Endmills on Graphite Machining
title_full_unstemmed Effect of Coating Thickness on Abrasion and Cutting Performance of NCD-Coated Ball Endmills on Graphite Machining
title_short Effect of Coating Thickness on Abrasion and Cutting Performance of NCD-Coated Ball Endmills on Graphite Machining
title_sort effect of coating thickness on abrasion and cutting performance of ncd-coated ball endmills on graphite machining
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10054475/
https://www.ncbi.nlm.nih.gov/pubmed/36985071
http://dx.doi.org/10.3390/mi14030664
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