Acoustic emission and cutting resistance in cutting of solid wood, MDF and particleboard
2008
Murase, Y.(Kyushu Univ., Fukuoka (Japan). Faculty of Agriculture) | Matsumoto, K. | Ohuchi, T.
In this study, to obtain basic knowledge on AE characteristics in the cutting process of wood and wood-based materials, the acoustic emission and cutting resistance in the cutting of solid wood, MDF and particleboard were examined. The following main results were obtained : (1) In the cutting of solid wood, with increasing slope angle of grain the Rsub(H) showed an increasing tendency and the Rsub(v) had a negative value with slight increase. The AE signals showed a rapid increase at slope angle range of 30 to 60 degree and then decreased or kept constant. It was found that the AE generation was closely linked to state of chip formation, compared with cutting resistances. (2) In the cutting of MDF, with increasing slope angle from pressing face of board the Rsub(H) showed an increasing tendency and the Rsub(v) had a negative value with slight increase. The AE signals also showed a rapid increase at slope angle range of 30 to 60 degree and then almost kept constant. It was found that the AE generation in cutting was closely linked to slope and orientation of fiber. Comparing with edge cutting, it was suggested that the values of cutting resistances and AEs in the cutting of only surface layer of MDF became more higher. (3) In the cutting of PB, the resistances showed irregular variations with time and AE was generated continuously. With increasing resin content of made board the Rsub(H) showed an increasing tendency and the AE signals also increased. It was found that the AE generation in cutting of PB was complicatedly linked to cutting of particle and presence of adhesive.
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