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Effect of high-speed steel screw drill geometry on cutting performance when machining austenitic stainless steel
Drilling into the solid material is one of the basic technological operations, which creates a cylindrical hole in an appropriate time with required quality. Drilling operation demands a favourable removal of chips from the cutting area because a creation of an undesirable shape of chips can impart...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10247819/ https://www.ncbi.nlm.nih.gov/pubmed/37286666 http://dx.doi.org/10.1038/s41598-023-36448-y |
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author | Sedlak, Josef Zouhar, Jan Kolomy, Stepan Slany, Martin Necesanek, Emil |
author_facet | Sedlak, Josef Zouhar, Jan Kolomy, Stepan Slany, Martin Necesanek, Emil |
author_sort | Sedlak, Josef |
collection | PubMed |
description | Drilling into the solid material is one of the basic technological operations, which creates a cylindrical hole in an appropriate time with required quality. Drilling operation demands a favourable removal of chips from the cutting area because a creation of an undesirable shape of chips can impart a lower quality of the drilled hole corresponding with the generation of excess heat due to the intense contact of the chip with drill. The solution for a proper machining is a suitable modification of the drill geometry i.e., point and clearance angles as presented in current study. The tested drills are made of M35 high-speed steel characterized by a very thin core at the point of the drill. An interesting feature of the drills is the use of cutting speed higher than 30 m min(−1), with the feed of 0.2 mm per revolution. The surface roughness (Ra and Rz lower than 1 µm and 6 µm respectively), cylindricity (0.045 mm), roundness (0.025 mm), perpendicularity of the hole axis (0.025 mm), diameters and position of the individual holes were achieved for a drill with point angle 138.32°and clearance angle 6.92 respectively. The increase of the drill point angle by 6° resulted in the decrease in the feed force of more than 150 N. In addition, an increase of the clearance angle by 1° resulted with a decrease in the feed force of 70 N. The results of the experiment showed that with the correct geometry of the tool the effective machining without using internal cooling can be realised. |
format | Online Article Text |
id | pubmed-10247819 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-102478192023-06-09 Effect of high-speed steel screw drill geometry on cutting performance when machining austenitic stainless steel Sedlak, Josef Zouhar, Jan Kolomy, Stepan Slany, Martin Necesanek, Emil Sci Rep Article Drilling into the solid material is one of the basic technological operations, which creates a cylindrical hole in an appropriate time with required quality. Drilling operation demands a favourable removal of chips from the cutting area because a creation of an undesirable shape of chips can impart a lower quality of the drilled hole corresponding with the generation of excess heat due to the intense contact of the chip with drill. The solution for a proper machining is a suitable modification of the drill geometry i.e., point and clearance angles as presented in current study. The tested drills are made of M35 high-speed steel characterized by a very thin core at the point of the drill. An interesting feature of the drills is the use of cutting speed higher than 30 m min(−1), with the feed of 0.2 mm per revolution. The surface roughness (Ra and Rz lower than 1 µm and 6 µm respectively), cylindricity (0.045 mm), roundness (0.025 mm), perpendicularity of the hole axis (0.025 mm), diameters and position of the individual holes were achieved for a drill with point angle 138.32°and clearance angle 6.92 respectively. The increase of the drill point angle by 6° resulted in the decrease in the feed force of more than 150 N. In addition, an increase of the clearance angle by 1° resulted with a decrease in the feed force of 70 N. The results of the experiment showed that with the correct geometry of the tool the effective machining without using internal cooling can be realised. Nature Publishing Group UK 2023-06-07 /pmc/articles/PMC10247819/ /pubmed/37286666 http://dx.doi.org/10.1038/s41598-023-36448-y Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Sedlak, Josef Zouhar, Jan Kolomy, Stepan Slany, Martin Necesanek, Emil Effect of high-speed steel screw drill geometry on cutting performance when machining austenitic stainless steel |
title | Effect of high-speed steel screw drill geometry on cutting performance when machining austenitic stainless steel |
title_full | Effect of high-speed steel screw drill geometry on cutting performance when machining austenitic stainless steel |
title_fullStr | Effect of high-speed steel screw drill geometry on cutting performance when machining austenitic stainless steel |
title_full_unstemmed | Effect of high-speed steel screw drill geometry on cutting performance when machining austenitic stainless steel |
title_short | Effect of high-speed steel screw drill geometry on cutting performance when machining austenitic stainless steel |
title_sort | effect of high-speed steel screw drill geometry on cutting performance when machining austenitic stainless steel |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10247819/ https://www.ncbi.nlm.nih.gov/pubmed/37286666 http://dx.doi.org/10.1038/s41598-023-36448-y |
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