Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Minimizing the Negative Effects of Coolant Channels on the Torsional and Torsional-Axial Stiffness of Drills
AB Sandvik Coromant, 811 34 Sandviken (SWE).
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0001-9331-7354
Department of Mechanical Engineering, Blekinge Institute of Technology, Karlskrona (SWE).
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0003-0976-9820
2021 (English)In: Metals, ISSN 2075-4701, Vol. 11, no 9Article in journal (Refereed) Published
Abstract [en]

Coolant channels allow internal coolant delivery to the cutting region and significantly improve drilling, but these channels also reduce the torsional and torsional-axial stiffness of the drills. Such a reduction in stiffness can degrade the quality of the drilled holes. The evacuation of cutting chips and the delivery of the cutting fluid put strict geometrical restrictions on the cross-section design of the drill. This necessitates careful selection and optimization of features such as the geometry of the coolant channels. This paper presents a new method that uses Prandtl's stress function to predict the torsional and torsional-axial stiffness values. Using this method drills with one central channel are compared to those with two eccentric coolant channels, which shows that with the same cross-section area, the reduction of axial and torsional-axial stiffness is notably smaller for the design with two eccentric channels compared to a single central channel. The stress function method is further used to select the appropriate location of the eccentric coolant channels to minimize the loss of torsional and torsional-axial stiffness. These results are verified by comparison to the results of three-dimensional finite element analyses.

Place, publisher, year, edition, pages
2021. Vol. 11, no 9
Keywords [en]
drilling; dynamics; stress function; torsional stiffness; torsional-axial stiffness
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-17507DOI: 10.3390/met11091473ISI: 000701398500001OAI: oai:DiVA.org:hv-17507DiVA, id: diva2:1599224
Note

This research was funded by “Stiftelsen för Kunskaps- och Kompetensutveckling” and Sandvik Coromant. Further support from the Research School of Simulation and Control of Materialaffecting Processes (SiCoMaP) at University West, Sweden is greatly appreciated.

Available from: 2021-09-30 Created: 2021-09-30 Last updated: 2022-03-31

Open Access in DiVA

Metals(3974 kB)104 downloads
File information
File name FULLTEXT01.pdfFile size 3974 kBChecksum SHA-512
77270b2375d000c0559e886f5f8b49e6585e9d3ee02a64f89078cd8a80d9a65e803946ef9f0d6592c8f8be0759ebe2ee98c72ded8f1f7e6dc319a6e975bdad1b
Type fulltextMimetype application/pdf

Other links

Publisher's full texthttps://www.mdpi.com/2075-4701/11/9/1473

Authority records

Eynian, MahdiBeno, Tomas

Search in DiVA

By author/editor
Eynian, MahdiBeno, Tomas
By organisation
Division of Subtractive and Additive Manufacturing
In the same journal
Metals
Manufacturing, Surface and Joining Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 104 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 122 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf