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Holz als Roh- und Werkstoff

, Volume 64, Issue 1, pp 30–36 | Cite as

Simulated and realised industrial yields in sawing of maritime pine (Pinus pinaster Ait.)

  • Isabel PintoEmail author
  • Sofia Knapic
  • Helena Pereira
  • Arto Usenius
ORIGINALARBEITEN ORIGINALS

Abstract

A sawing simulation software was evaluated by comparison with a real situation in the industrial sawing of maritime pine (Pinus pinaster Ait.) stems. At an operational sawmill sawing yields were measured for the conversion of logs with two sawing patterns: production of boards and production of boards and lumber. The simulation used the WoodCIM® optimisation software with similar sawing set-ups and dimensionally matching virtual logs obtained from cross cutting of 3D mathematical reconstructions of maritime pine stems. The virtual maritime pine stems and the sawing simulation software showed potential to evaluate the impact of raw material and process characteristics on the production performance. The simulated sawing yields corresponded closely to the industrial yields for the production of boards (57% volume yield). For production of lumber and boards, the simulation allowed to obtain a higher volume (45% vs. 53%). The negative impact of resin production on the sawing yields was estimated by comparing the industrial yields of resin tapped trees with matching virtual logs and showed a loss of 11% sawn wood volume, increasing with log diameter.

Keywords

Industrial Yield Forest Prod Resin Production Resin Pocket Sawing Pattern 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Simulierte und tatsächliche Schnittholzausbeute beim industriellen Einschnitt von Seekiefern (Pinus pinaster Ait.)

Zusammenfassung

Eine Simulationssoftware zur Einschnittoptimierung wurde durch den Vergleich mit einem realen Einschnitt von Seekiefernstämmen (Pinus pinaster Ait.) bewertet. Die mit zwei verschiedenen Schnittbildern – Einschnitt von Brettern sowie Einschnitt von Brettern und Bauholz – in einem Sägewerk erzielten Schnittholzausbeuten wurden gemessen.

Für die Simulation wurde die WoodCIM® Optimierungssoftware benutzt. Dabei wurden ähnliche Schnittbilder und Abschnitte mit gleichen Durchmessern verwendet. Diese wurden aus virtuell modellierten Seekiefernstämmen erzeugt.

Die virtuellen Stämme sowie die Simulationssoftware zeigten die Möglichkeit, den Einfluss des Rohmaterials sowie der Prozessbedingungen auf die Schnittholzproduktion zu bewerten.

Die Ausbeuten für den reinen Bretteinschnitt aus der Simulation stimmen genau mit den in der Praxis ermittelten Ausbeuten überein (57% Volumenausbeute). Bei der gleichzeitigen Produktion von Bauholz und Brettern ergibt sich aus der Simulation eine höhere Ausbeute (53% statt 45%).

Der negative Einfluss der Harzgewinnung auf die Schnittholzausbeute wurde durch den Vergleich der in der Praxis erzielten Schnittholzausbeute von zur Harzgewinnung genutzten Bäumen mit der von entsprechenden virtuellen Bäumen geschätzt. Dabei zeigte sich ein Ausbeuteverlust von 11%, der sich mit steigendem Stammdurchmesser vergrösserte.

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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • Isabel Pinto
    • 1
    Email author
  • Sofia Knapic
    • 2
  • Helena Pereira
    • 2
  • Arto Usenius
    • 1
  1. 1.VTT Building and TransportVTTFinland
  2. 2.Centro de Estudos FlorestaisInstituto Superior de AgronomiaLisboaPortugal

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