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European Journal of Wood and Wood Products

, Volume 76, Issue 6, pp 1653–1661 | Cite as

Lathe check development and properties: effect of log soaking temperature, compression rate, cutting radius and cutting speed during peeling process of European beech (Fagus sylvatica L.) veneer

  • Anti Rohumaa
  • Joffrey Viguier
  • Stéphane Girardon
  • Michael Krebs
  • Louis Denaud
Original
  • 26 Downloads

Abstract

The depth of lathe checks and integrity of veneer have been shown to be critical factors affecting the bonding process but also affecting the mechanical properties of veneer-based products. This study shows how beech (Fagus sylvatica L.) veneer lathe checks interval and depths are affected by soaking temperature, compression rate, cutting radius and cutting speed during the peeling process in well-controlled conditions. Freshly felled European beech logs were soaked in a water tank at 50, 60, 70 or 80 °C. Following soaking, the logs were immediately peeled with laboratory scale lathe (SEM S500) to 3.5 mm thick veneer at a cutting speed of 1, 2 or 3 m s−1 and pressure rates of 0, 5, 10 or 15%. The correlation between lathe check depth and frequency was validated using “Système de Mesure d’Ouverture des Fissures” (SMOF) device, which enables to measure check properties reliably on veneer ribbons. In a well-controlled peeling process, the strong correlation between check depth and interval was shown. At higher temperature, shallower and more frequent checks are created compared to lower temperature. However, the effect of soaking temperature (between 50 and 80 °C) on veneer checking is much smaller than the effect of compression rate during peeling process, where the higher compression rate produced veneer with shallower and more frequent checks. The results of the study also show that the direction of lathe check propagation could be affected by the rays in beech veneer. Rays resist crack growth in tangential direction, but act as weak planes in radial direction.

Notes

Acknowledgements

The authors gratefully acknowledge the financial support from the Bourgogne Franche-Comté region and Pollmeier. The authors would also like to thank the Xylomat Technical Platform from the Xylomat Scientific Network funded by ANR-10-EQPX-16 XYLOFOREST.

References

  1. Antikainen T, Eskelinen J, Rohumaa A, Vainio T, Hughes M (2015) Simultaneous measurement of lathe check depth and the grain angle of birch (Betula pendula Roth) veneers using laser trans-illumination imaging. Wood Sci Technol 49:591–605CrossRefGoogle Scholar
  2. Ashby MF, Easterling KE, Harrysson R, Maiti SK (1985) The fracture and toughness of woods. Proc R Soc 398:261–280CrossRefGoogle Scholar
  3. Blomqvist L, Sandberg D, Johansson J (2014) Influence of veneer orientation on shape stability of plane laminated veneer products. Wood Mater Sci Eng 9:224–232CrossRefGoogle Scholar
  4. Boatright SWJ, Garrett GG (1983) The effect of microstructure and stress state on the fracture behaviour of wood. J Mater Sci 18:2181–2199CrossRefGoogle Scholar
  5. Buchelt B, Wagenführ A, Dietzel A, Raßbach H (2018) Quantification of cracks and cross-section weakening in sliced veneers. Eur J Wood Prod 76:381–384CrossRefGoogle Scholar
  6. Darmawan W, Nandika D, Massijaya Y, Kabe A, Rahayu I, Denaud L, Ozarska B (2015) Lathe check characteristics of fast growing sengon veneers and their effect on LVL glue-bond and bending strength. J Mater Process Technol 215:181–188CrossRefGoogle Scholar
  7. Denaud L, Bléron L, Ratle A, Marchal R (2007) Online control of wood peeling process: acoustical and vibratory measurements of lathe checks frequency. Ann For Sci 64:569–575CrossRefGoogle Scholar
  8. Denaud L, Bléron L, Eyma F, Marchal R (2012) Wood peeling process monitoring: a comparison of signal processing methods to estimate veneer average lathe check frequency. Eur J Wood Prod 70:256–261CrossRefGoogle Scholar
  9. Dupleix A, Denaud L, Bléron L, Marchal R, Hughes M (2013) The effect of log heating temperature on the peeling process and veneer quality: beech, birch, Douglas-fir and spruce case studies. Eur J Wood Prod 71:163–171CrossRefGoogle Scholar
  10. Leney L (1960) A photographic study of veneer formation. For Prod J 10:133–139Google Scholar
  11. Lutz JF (1960) Heating veneer bolts to improve quality of Douglas-fir plywood. US For. Prod. Lab. Rep. No 2182, Madison, WiseGoogle Scholar
  12. Lutz JF (1974) Techniques for peeling, slicing, and drying veneer. US For. Prod. Lab. Rep. No 228, Madison, WiseGoogle Scholar
  13. Lutz JF (1978) Wood veneer: log selection, cutting, and drying. US For. Prod. Lab. Rep. No 1577, Madison, WiseGoogle Scholar
  14. Marchal R, Mothe F, Denaud LE, Thibaut B, Bléron L (2009) Cutting forces in wood machining—basics and applications in industrial processes. A review COST Action E35 2004–2008: wood machining—micromechanics and fracture. Holzforschung 63:157–167CrossRefGoogle Scholar
  15. McMillin CW (1958) The relation of mechanical properties of wood and nosebar pressure in the production of veneer. For Prod J 8:23–32Google Scholar
  16. Meriluoto J (1965) The influence of raw material factors on the quantity and quality of rotary cut brick veneer. Acta For Fenn 80:1–155CrossRefGoogle Scholar
  17. Pałubicki B, Marchal R, Butaud JC, Denaud LE, Bléron L, Collet R, Kowaluk G (2010) A method of lathe checks measurement; SMOF device and its software. Eur J Wood Prod 68:151–159CrossRefGoogle Scholar
  18. Pot G, Denaud LE, Collet R (2015) Numerical study of the influence of veneer lathe checks on the elastic mechanical properties of laminated veneer lumber (LVL) made of beech. Holzforschung 69:337–345CrossRefGoogle Scholar
  19. Rohumaa A, Hunt CG, Hughes M, Frihart CR, Logren J (2013) The influence of lathe check depth and orientation on the bond quality of phenol-formaldehyde-bonded birch plywood. Holzforschung 67:779–786CrossRefGoogle Scholar
  20. Rohumaa A, Hunt CG, Frihart CR, Saranpää P, Ohlmeyer M, Hughes M (2014) The influence of felling season and log-soaking temperature on the wetting and phenol formaldehyde adhesive bonding characteristics of birch veneer. Holzforschung 68:965–970CrossRefGoogle Scholar
  21. Rohumaa A, Antikainen T, Hunt CG, Frihart CR, Hughes M (2016a) The influence of log soaking temperature on surface quality and integrity performance of birch (Betula pendula Roth) veneer. Wood Sci Technol 50:463–474CrossRefGoogle Scholar
  22. Rohumaa A, Yamamoto A, Hunt CG, Frihart CR, Hughes M, Kers J (2016b) Effect of log soaking and the temperature of peeling on the properties of rotary-cut birch (Betula pendula Roth) veneer bonded with phenol-formaldehyde adhesive. BioResources 11:5829–5838CrossRefGoogle Scholar
  23. Sellers T (1985) Plywood and adhesive technology. CRC Press, Boca RatonGoogle Scholar
  24. Spelter H (1991) Recent developments in veneer peeling confront quality variables. Panel World 5:54–65Google Scholar
  25. Tomppo L, Tiitta M, Lappalainen R (2009) Ultrasound evaluation of lathe check depth in birch veneer. Eur J Wood Prod 67:27–35CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.LaBoMaP, École Nationale Supérieure d’Arts et Métiers (ENSAM)ClunyFrance
  2. 2.Fiber LaboratorySouth-Eastern Finland University of Applied SciencesSavonlinnaFinland

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