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An experimental study of the chipping process with focus on energy consumption and chipping angles
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
2018 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 33, no 3, p. 460-467Article in journal (Refereed) Published
Abstract [en]

A series of chipping experiments were performed under both dynamic and quasi-static conditions in a laboratory wood chipper (dynamic) and in a MTS-servohydraulic testing machine (quasi-static). One aim with the experiments was to investigate the rate dependency of the energy consumption during chipping. Another aim was to try to determine the load per unit knife edge length required to initiate cutting. The experiments were carried out using different combinations of spout and edge angles. It was found that for large edge angles (keeping the spout angle constant at 30 °30^\circ ) there was a slight rate dependency such that the energy consumption was larger at higher cutting rates which is quite in opposite of what is expected if wood is assumed to be a viscoelastic material. It was also found that to determine the force at initiation of cutting, is not a trivial task. Both Acoustic Emission monitoring and visual inspection was used to this end. The wood species used in this study was pine (Pinus silvestris). 

Place, publisher, year, edition, pages
2018. Vol. 33, no 3, p. 460-467
Keywords [en]
energy consumption, rate dependency, wood chipping
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:miun:diva-34599DOI: 10.1515/npprj-2018-3055ISI: 000450923900012Scopus ID: 2-s2.0-85052632762OAI: oai:DiVA.org:miun-34599DiVA, id: diva2:1252997
Available from: 2018-10-03 Created: 2018-10-03 Last updated: 2018-12-11Bibliographically approved

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Nyström, JonasGradin, PerThörnberg, Benny

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CiteExportLink to record
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