Denaud, Louis Etienne (2006) Vibro-acoustic analysis of the peeling process. PhD thesis Mécanique, ENSAM 2006ENAM0043.
Abstract
Working material process generate vibro-acoustic phenomena which are in one hand sources of noise and in the other hand useful information describing the state of the cut. In the case of the peeling process, operators are able to check some settings of their device "hearing the noise". A survey from workers' knowledge was conduced to identify typical situation they can identify.
Peeling trials were conduced on both two homogeneous species (beech and poplar) and a reference' material (PTFE) while using the microlathe of the LABOMAP.
This first study, carried in very controlled conditions, allows identifying lathe check signature in both time and spectral domain. Influence of the process parameters on lathe check phenomenon were clarified or confirmed. The green wood quality characterization is still a problem today on both technical and normative point of view. The principle of a simple procedure based on vibratory measurements was proposed to determine the position of the checks along the veneer. The vibro-acoustic behaviour of the microlathe as regard to cutting parameters (veneer thickness, clearance angle, cutting speed, pressure rate of the pressure bare, species, tool wear) was analysed in both temporal and spectral area. The following stage is to validate results obtained on a bolt for an industrial lathe type.
| Item Type: | PhD Thesis (PhD) |
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| Thesis Supervisor: | Marchal, Rémy |
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| Date: | November 2006 |
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| Board of examiners: | Mothe, Frédéric and Simon, Laurent and Thibaut, Bernard and Bléron, Laurent and Ratle, Alain |
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| Ecole Doctorale: | ED 432 ECOLE DOCTORALE SCIENCES DES METIERS DE L'INGENIEUR |
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| Discipline: | Mécanique |
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| Collection (Fonds): | ENSAM |
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| Institution: | ENSAM |
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| Subjects: | 4. Materials Science, Mechanics and Mechanical Engineering |
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| Uncontrolled Keywords: | Peeling, Microlathe, Homogeneous species, Lathe checks, Forces, Vibrations, Acoustic, Signal processing, Déroulage, Microdéroulage, Bois homogènes, Fissuration, Efforts, Vibrations, Acoustique, Traitement du signal |
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