Accuracy improvement of volumetric error modeling in CNC machine tools.
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| Title: | Accuracy improvement of volumetric error modeling in CNC machine tools. |
|---|---|
| Authors: | Vahebi, Mehrdad1 vahebi.mehrdad@aut.ac.ir, Arezoo, Behrooz1 barezoo@yahoo.com |
| Source: | International Journal of Advanced Manufacturing Technology. Mar2018, Vol. 95 Issue 5-8, p2243-2257. 15p. |
| Subjects: | Numerical control of machine tools, Machine tool path, Angular momentum (Mechanics), Manufacturing processes, Rigid body mechanics |
| Abstract: | Three-axis structures are widely used as the main body of multi-axis CNC machine tools and coordinate measuring machines. As an open-loop mechanism, the cumulative effects of position-dependent/position-independent geometric errors of the moving axes cause significant volumetric deviation of the functional point. Such effect is more tangible for angular error motions, where they can considerably be magnified by long Abbe offsets. An appropriate volumetric error modeling approach should estimate the total effect of individual error motions accurately. Accuracy of the model depends on applied error propagation scheme and correctness of the error identification procedure. In this paper, both issues are investigated in order to enhance the practical validity of the model in presence of rigid-body and steady thermal assumptions. Regarding mechanical design of the sliding system, the linear axes are categorized in two different extruding type and sliding type with different error-mapping functions. Based on the homogeneous transformation matrix method, the overall consequence of error motions of each axis is calculated separately within entire working volume. The new approach explicitly contributes the axis design and structural configuration in error propagation procedure and facilitates the root cause identification for volumetric deviations of the functional point. The modeling scheme is verified experimentally on a threeaxis CNC machine tool via comparison of the estimations with measured error values on circular and diagonal tool paths. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Advanced Manufacturing Technology is the property of Springer Nature 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.) | |
| Database: | Engineering Source |
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| Items | – Name: Title Label: Title Group: Ti Data: Accuracy improvement of volumetric error modeling in CNC machine tools. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Vahebi%2C+Mehrdad%22">Vahebi, Mehrdad</searchLink><relatesTo>1</relatesTo><i> vahebi.mehrdad@aut.ac.ir</i><br /><searchLink fieldCode="AR" term="%22Arezoo%2C+Behrooz%22">Arezoo, Behrooz</searchLink><relatesTo>1</relatesTo><i> barezoo@yahoo.com</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Advanced+Manufacturing+Technology%22">International Journal of Advanced Manufacturing Technology</searchLink>. Mar2018, Vol. 95 Issue 5-8, p2243-2257. 15p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Numerical+control+of+machine+tools%22">Numerical control of machine tools</searchLink><br /><searchLink fieldCode="DE" term="%22Machine+tool+path%22">Machine tool path</searchLink><br /><searchLink fieldCode="DE" term="%22Angular+momentum+%28Mechanics%29%22">Angular momentum (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Manufacturing+processes%22">Manufacturing processes</searchLink><br /><searchLink fieldCode="DE" term="%22Rigid+body+mechanics%22">Rigid body mechanics</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Three-axis structures are widely used as the main body of multi-axis CNC machine tools and coordinate measuring machines. As an open-loop mechanism, the cumulative effects of position-dependent/position-independent geometric errors of the moving axes cause significant volumetric deviation of the functional point. Such effect is more tangible for angular error motions, where they can considerably be magnified by long Abbe offsets. An appropriate volumetric error modeling approach should estimate the total effect of individual error motions accurately. Accuracy of the model depends on applied error propagation scheme and correctness of the error identification procedure. In this paper, both issues are investigated in order to enhance the practical validity of the model in presence of rigid-body and steady thermal assumptions. Regarding mechanical design of the sliding system, the linear axes are categorized in two different extruding type and sliding type with different error-mapping functions. Based on the homogeneous transformation matrix method, the overall consequence of error motions of each axis is calculated separately within entire working volume. The new approach explicitly contributes the axis design and structural configuration in error propagation procedure and facilitates the root cause identification for volumetric deviations of the functional point. The modeling scheme is verified experimentally on a threeaxis CNC machine tool via comparison of the estimations with measured error values on circular and diagonal tool paths. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Advanced Manufacturing Technology is the property of Springer Nature 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: 10.1007/s00170-017-1294-x Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 2243 Subjects: – SubjectFull: Numerical control of machine tools Type: general – SubjectFull: Machine tool path Type: general – SubjectFull: Angular momentum (Mechanics) Type: general – SubjectFull: Manufacturing processes Type: general – SubjectFull: Rigid body mechanics Type: general Titles: – TitleFull: Accuracy improvement of volumetric error modeling in CNC machine tools. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Vahebi, Mehrdad – PersonEntity: Name: NameFull: Arezoo, Behrooz IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 03 Text: Mar2018 Type: published Y: 2018 Identifiers: – Type: issn-print Value: 02683768 Numbering: – Type: volume Value: 95 – Type: issue Value: 5-8 Titles: – TitleFull: International Journal of Advanced Manufacturing Technology Type: main |
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