Hydrodynamic arc moving mechanism in EDM of polycrystalline diamond.
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| Title: | Hydrodynamic arc moving mechanism in EDM of polycrystalline diamond. |
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| Authors: | Wang, Xiangzhi1,2 (AUTHOR), Guo, Hun2 (AUTHOR), Wu, Ge1 (AUTHOR), Ding, Songlin1 (AUTHOR) songlin.ding@rmit.edu.au |
| Source: | Materials & Manufacturing Processes. 2022, Vol. 37 Issue 14, p1652-1663. 12p. |
| Subjects: | Electric arc, Surface topography, Electrical resistivity, Diamond crystals, Diamonds, Dielectrics |
| Abstract: | Polycrystalline diamonds (PCD) are difficult-to-cut materials due to their ultra-hardness caused by the diamond particles sintered in the materials' structure. Electrical discharge machining is a universal nontraditional method to process electrically conductive hard-to-cut materials by using electro-thermal energy without considering the workpiece's hardness and strength. However, due to the high electrical resistivity caused by the non-conductive diamond particles, EDM machining characteristics of PCD are different from those of metals. Dielectric flushing can disturb the position and shape of the plasma channel, resulting in predictable movements of the sparking spot, which provides the possibility of preventing the discharge from being trapped between the non-conductive particles during each single discharge. This paper explored the potential of improving the processability of PCD by utilizing the moving electric arcs formed by dielectric flushing. Mathematical models were established and simulated to investigate the movement behavior of plasma channels in one single-pulse discharge for the first time. A series of experiments were conducted to investigate the theory and validate the assumptions. The results showed that dielectric flushing stretched the plasma channel and changed the spots of the arcs, which increased the material removal rate and improved the consistency of the processed surface topography. [ABSTRACT FROM AUTHOR] |
| Copyright of Materials & Manufacturing Processes is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 159177136 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Hydrodynamic arc moving mechanism in EDM of polycrystalline diamond. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Wang%2C+Xiangzhi%22">Wang, Xiangzhi</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guo%2C+Hun%22">Guo, Hun</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wu%2C+Ge%22">Wu, Ge</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ding%2C+Songlin%22">Ding, Songlin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> songlin.ding@rmit.edu.au</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Materials+%26+Manufacturing+Processes%22">Materials & Manufacturing Processes</searchLink>. 2022, Vol. 37 Issue 14, p1652-1663. 12p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Electric+arc%22">Electric arc</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+topography%22">Surface topography</searchLink><br /><searchLink fieldCode="DE" term="%22Electrical+resistivity%22">Electrical resistivity</searchLink><br /><searchLink fieldCode="DE" term="%22Diamond+crystals%22">Diamond crystals</searchLink><br /><searchLink fieldCode="DE" term="%22Diamonds%22">Diamonds</searchLink><br /><searchLink fieldCode="DE" term="%22Dielectrics%22">Dielectrics</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Polycrystalline diamonds (PCD) are difficult-to-cut materials due to their ultra-hardness caused by the diamond particles sintered in the materials' structure. Electrical discharge machining is a universal nontraditional method to process electrically conductive hard-to-cut materials by using electro-thermal energy without considering the workpiece's hardness and strength. However, due to the high electrical resistivity caused by the non-conductive diamond particles, EDM machining characteristics of PCD are different from those of metals. Dielectric flushing can disturb the position and shape of the plasma channel, resulting in predictable movements of the sparking spot, which provides the possibility of preventing the discharge from being trapped between the non-conductive particles during each single discharge. This paper explored the potential of improving the processability of PCD by utilizing the moving electric arcs formed by dielectric flushing. Mathematical models were established and simulated to investigate the movement behavior of plasma channels in one single-pulse discharge for the first time. A series of experiments were conducted to investigate the theory and validate the assumptions. The results showed that dielectric flushing stretched the plasma channel and changed the spots of the arcs, which increased the material removal rate and improved the consistency of the processed surface topography. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Materials & Manufacturing Processes is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1080/10426914.2022.2032146 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 1652 Subjects: – SubjectFull: Electric arc Type: general – SubjectFull: Surface topography Type: general – SubjectFull: Electrical resistivity Type: general – SubjectFull: Diamond crystals Type: general – SubjectFull: Diamonds Type: general – SubjectFull: Dielectrics Type: general Titles: – TitleFull: Hydrodynamic arc moving mechanism in EDM of polycrystalline diamond. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Wang, Xiangzhi – PersonEntity: Name: NameFull: Guo, Hun – PersonEntity: Name: NameFull: Wu, Ge – PersonEntity: Name: NameFull: Ding, Songlin IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 10 Text: 2022 Type: published Y: 2022 Identifiers: – Type: issn-print Value: 10426914 Numbering: – Type: volume Value: 37 – Type: issue Value: 14 Titles: – TitleFull: Materials & Manufacturing Processes Type: main |
| ResultId | 1 |
