The Effect of TiN-, TiCN-, TiAlN-, and TiSiN Coated Tools on the Surface Defects and Geometric Tolerances of Holes in Multi-Spindle Drilling of Al2024 Alloy
The integrity of machined holes depends on many parameters, some of which are related to the cutting tool (geometry, coating, material). Other influential parameters are related to the machining process variables (spindle speed, feed rate, workpiece material), all of which can affect the quality of...
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MDPI AG
2021-07-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/7/1103 |
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| author | Muhammad Aamir Adrian Davis William Keeble Ugur Koklu Khaled Giasin Ana Vafadar Majid Tolouei-Rad |
| author_facet | Muhammad Aamir Adrian Davis William Keeble Ugur Koklu Khaled Giasin Ana Vafadar Majid Tolouei-Rad |
| author_sort | Muhammad Aamir |
| collection | DOAJ |
| description | The integrity of machined holes depends on many parameters, some of which are related to the cutting tool (geometry, coating, material). Other influential parameters are related to the machining process variables (spindle speed, feed rate, workpiece material), all of which can affect the quality of the hole and drilling induced damage on its surface. This study investigates the effect of uncoated tools and four types of tool coatings (TiN-, TiCN-, TiAlN-, and TiSiN) on the hole quality and its microstructure. The study analyzed several hole geometrical metrics, namely hole size, circularity, cylindricity, and perpendicularity of an Al2024 aluminum alloy using a multi-spindle drilling process that utilizes three drills capable of creating multiple holes simultaneously. The results showed that the uncoated carbide drill gave a high-hole quality at low spindle speed. Regarding the coated drills, TiCN coated drills produced holes with the least deviation, circularity, cylindricity and perpendicularity at high spindle speeds. TiSiN–carbide coated drills produced the most oversized holes and noticeable damage and deformations on their surface following TiAlN and TiN. The common surface damage found on the inner hole surface was smearing, feed marks, and metal debris adhesion. The ANOVA results revealed that the tool type had the highest percentage contribution that mainly affected the hole quality. |
| first_indexed | 2024-03-10T09:32:51Z |
| format | Article |
| id | doaj.art-e51820e8f09c43529a65bee2a48a1d0d |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T09:32:51Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-e51820e8f09c43529a65bee2a48a1d0d2023-11-22T04:23:52ZengMDPI AGMetals2075-47012021-07-01117110310.3390/met11071103The Effect of TiN-, TiCN-, TiAlN-, and TiSiN Coated Tools on the Surface Defects and Geometric Tolerances of Holes in Multi-Spindle Drilling of Al2024 AlloyMuhammad Aamir0Adrian Davis1William Keeble2Ugur Koklu3Khaled Giasin4Ana Vafadar5Majid Tolouei-Rad6School of Engineering, Edith Cowan University, Joondalup, WA 6027, AustraliaSchool of Engineering, Edith Cowan University, Joondalup, WA 6027, AustraliaSchool of Mechanical and Design Engineering, University of Portsmouth, Portsmouth PO1 3DJ, UKFaculty of Engineering, Department of Mechanical Engineering, Karamanoglu Mehmetbey University, Karaman 70100, TurkeySchool of Mechanical and Design Engineering, University of Portsmouth, Portsmouth PO1 3DJ, UKSchool of Engineering, Edith Cowan University, Joondalup, WA 6027, AustraliaSchool of Engineering, Edith Cowan University, Joondalup, WA 6027, AustraliaThe integrity of machined holes depends on many parameters, some of which are related to the cutting tool (geometry, coating, material). Other influential parameters are related to the machining process variables (spindle speed, feed rate, workpiece material), all of which can affect the quality of the hole and drilling induced damage on its surface. This study investigates the effect of uncoated tools and four types of tool coatings (TiN-, TiCN-, TiAlN-, and TiSiN) on the hole quality and its microstructure. The study analyzed several hole geometrical metrics, namely hole size, circularity, cylindricity, and perpendicularity of an Al2024 aluminum alloy using a multi-spindle drilling process that utilizes three drills capable of creating multiple holes simultaneously. The results showed that the uncoated carbide drill gave a high-hole quality at low spindle speed. Regarding the coated drills, TiCN coated drills produced holes with the least deviation, circularity, cylindricity and perpendicularity at high spindle speeds. TiSiN–carbide coated drills produced the most oversized holes and noticeable damage and deformations on their surface following TiAlN and TiN. The common surface damage found on the inner hole surface was smearing, feed marks, and metal debris adhesion. The ANOVA results revealed that the tool type had the highest percentage contribution that mainly affected the hole quality.https://www.mdpi.com/2075-4701/11/7/1103multi-spindle drillinghole sizecircularityperpendicularitycylindricityhole surface defects |
| spellingShingle | Muhammad Aamir Adrian Davis William Keeble Ugur Koklu Khaled Giasin Ana Vafadar Majid Tolouei-Rad The Effect of TiN-, TiCN-, TiAlN-, and TiSiN Coated Tools on the Surface Defects and Geometric Tolerances of Holes in Multi-Spindle Drilling of Al2024 Alloy Metals multi-spindle drilling hole size circularity perpendicularity cylindricity hole surface defects |
| title | The Effect of TiN-, TiCN-, TiAlN-, and TiSiN Coated Tools on the Surface Defects and Geometric Tolerances of Holes in Multi-Spindle Drilling of Al2024 Alloy |
| title_full | The Effect of TiN-, TiCN-, TiAlN-, and TiSiN Coated Tools on the Surface Defects and Geometric Tolerances of Holes in Multi-Spindle Drilling of Al2024 Alloy |
| title_fullStr | The Effect of TiN-, TiCN-, TiAlN-, and TiSiN Coated Tools on the Surface Defects and Geometric Tolerances of Holes in Multi-Spindle Drilling of Al2024 Alloy |
| title_full_unstemmed | The Effect of TiN-, TiCN-, TiAlN-, and TiSiN Coated Tools on the Surface Defects and Geometric Tolerances of Holes in Multi-Spindle Drilling of Al2024 Alloy |
| title_short | The Effect of TiN-, TiCN-, TiAlN-, and TiSiN Coated Tools on the Surface Defects and Geometric Tolerances of Holes in Multi-Spindle Drilling of Al2024 Alloy |
| title_sort | effect of tin ticn tialn and tisin coated tools on the surface defects and geometric tolerances of holes in multi spindle drilling of al2024 alloy |
| topic | multi-spindle drilling hole size circularity perpendicularity cylindricity hole surface defects |
| url | https://www.mdpi.com/2075-4701/11/7/1103 |
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