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
Analog and Digital Approaches of Attenuation Boring Bar Vibrations during Metal Cutting Operations
Responsible organisation
2005 (English)Conference paper, Published paper (Refereed) Published
Abstract [en]

In metal cutting operations tool vibration is a frequent problem. Vibrations appear under the excitation applied by the material deformation process during the machining of a workpiece. In order to perform an internal turning or boring operation, e.g. in a pre-drilled hole in a workpiece, it is generally required that the boring bar should be long and slender; therefore it is easily subjected to vibrations. These vibrations will affect the result of machining, in particular the surface finish, and also the tool life may be reduced. As a result of tool vibration severe acoustic noise frequently occurs in the working environment. The vibration problem is to a large extent related to the boring bar low-order fundamental bending modes. In order to control boring bar vibrations in the primary cutting direction an analog and a digital feedback controllers have been used. In both approaches an active boring bar with a built-in actuator has been used. In order to measure the response of the active boring bar, accelerometers are mounted nearby the area, where the excitation force is applied due to material deformation process. This means that in either approach the boring bar vibrations are attenuated actively by the controlled secondary anti-vibrations induced by the actuator. The digital controller, based on the feedback filtered-x LMS-algorithm, manages to reduce the boring bar vibrations in the primary cutting direction by up to approximately 44 dB at the first bending resonance frequency. The analog controller, based on a flexible orthogonal gain and phase lag compensation, results in an attenuation of the boring bar vibrations in the primary cutting direction by up to approximately 40 dB at the first bending resonance frequency. Both controllers also suppress all the harmonics of the first bending resonance frequency. Vibration attenuation performances of the two controllers are compared and discussed.

Place, publisher, year, edition, pages
Lisbon, 2005.
Keywords [en]
Active control, boring bar vibrations, metal cutting
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:bth-9912Local ID: oai:bth.se:forskinfo7090F0652C8E73A7C125706C00237E38OAI: oai:DiVA.org:bth-9912DiVA, id: diva2:837895
Conference
Twelfth International Congress on Sound and Vibration
Available from: 2012-09-18 Created: 2005-08-29 Last updated: 2015-06-30Bibliographically approved

Open Access in DiVA

fulltext(460 kB)154 downloads
File information
File name FULLTEXT01.pdfFile size 460 kBChecksum SHA-512
0fc9e1a6629b09d5b596c39acb4ee17a2bf24682fd97f2ee1a22c16ce45b71504e50104dda10519415dfb47f9d1acd05e9e9358257ebb1b73dd00e149a4d6318
Type fulltextMimetype application/pdf

Authority records

Håkansson, LarsClaesson, Ingvar

Search in DiVA

By author/editor
Håkansson, LarsClaesson, Ingvar
Signal Processing

Search outside of DiVA

GoogleGoogle Scholar
Total: 156 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

urn-nbn

Altmetric score

urn-nbn
Total: 134 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