Effect of Knife Wear on the Gluability of Planed Surfaces of Radiata Pine
Keywords:Planing, knife wear, gluing properties, radiata pine
AbstractThe objectives of this study were to evaluate the effect of knife wear on the gluability of planed surfaces of radiata pine. A conventional process was used to plane samples to four lengths: 200; 10,000; 20,000; and 30,000 m. Cutting-edge recession was measured on the clearance surface of the planing knife for each length. The gluing properties of the planed surfaces were determined for each of the four levels of knife wear using polyvinyl acetate and emulsion polymer isocyanate adhesives. The results showed that the greatest amount of cutting-edge recession on the clearance surface was 65 μm after 30,000 m of planing. The tensile shear strength (TSS) of the lap-joint glue line decreased with knife wear from increased planing. However, TSS was generally greater than the minimum prescribed by the BS EN 204 standard. The effect of knife wear on TSS was more significant after accelerated aging of the glued samples.
BSEN (1991a) British Standard EN 204. Non-structural adhesives for joining of wood and derived timber products. European Standard. London British Standard Institution, UK.nBSEN (1991b) British Standard EN 205. Test methods for wood adhesives for non-structural applications. Determination of tensile shear strength of lap joints. European Standard. London British Standard Institution, UK.nBustos C, Hernández RE, Beauregard R, Mohammad M (2004) Influence of machining parameters on the structural performance of finger-jointed black spruce. Wood Fiber Sci 36(3):359-367.nHare DA, Kutscha NP (1974) Microscopy of eastern spruce plywood gluelines. Wood Sci 6(3):294-304.nHernández RE, De Moura LF (2002) Effects of knife jointing and wear on the planed surface quality of northern red oak wood. Wood Fiber Sci 34(4):540-552.nHernández RE, Naderi N (2001) Effect of knife jointing on the gluing properties of wood. Wood Fiber Sci 33(2): 292-301.nHernández RE, Rojas G (2002) Effects of knife jointing and wear on the planed surface quality of sugar maple wood. Wood Fiber Sci 34(2):293-305.nJokerst RW, Steward HA (1976) Knife—versus abrasiveplaned wood: Quality of adhesive bonds. Wood Fiber Sci 8(2):107-113.nKamke FA, Lee JN (2007) Adhesive penetration in wood—A review. Wood Fiber Sci 39(2):205-220.nKlamecki BE (1979) A review of wood cutting tool wear literature. Holz Roh Werkst 37(7):265-276.nKutscha P, Caster RW (1987) Factors affecting the bond quality of hem-fir finger-joints. Forest Prod J 37(4):43-48.nMurmanis L, River B, Stewart H (1986) Surface and subsurface characteristics related to abrasive-planing conditions. Wood Fiber Sci 18(1):107-117.nMurmanis N, River BH, Stewart H (1983) Microscopy of abrasive-planed surfaces in wood-adhesive bonds. Wood Fiber Sci 15(2):102-115.nPetkov P (1992) Wood cutting (Ряэане на дбρвесинама). University of Forestry. Ed. Земuздам. Sofia. Bulgari. 335 pp.nReeb JE, Karchesy JJ, Foster JR, Krahmer RL (1998) Finger-joint quality after 4, 6, and 32 hours of knife wear: Preliminary results. Forest Prod J 48(7/8):33-36.nRiver B, Miniutti V (1975) Surface damage before gluing-weak joints. Wood Wood Proc 80(7):35-38.nSarwar M, Persson M, Hellbergh H (2004) Wear of high speed steel bi-metal bandsaw blade when cutting Avesta Polarite 17-7 stainless steel in the As-cast State. Materials Science Forums. Vols. 471-472. Trans Tech Publications, Switzerland. Pages 431-437.nSarwar M, Persson M, Hellbergh H (2005) Chip formation mechanisms in bandsaw metal cutting. In Proc 18th International Conference on Production Research, Salerno, Italy.nSingh AP, Anderson CR, Warnes JM, Matsumura J (2002) The effect of planing on the microscopic structure of Pinus radiata wood cells in relation to penetration of PVA glue. Holz Roh Werkst 60(5):333-341.nStatgraphics Plus (1994) Version 7.1; Users guide reference. Statistical Graphics Manugistics Group Inc, Rockville, MA.nStehr M, Östlund S (2000) An investigation of the crack tendency on wood surfaces after different machining operations. Holzforschung 54(4):427-436.n
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