摘要
中山杉是江苏省中国科学院植物研究所经人工杂交培育出来的优良树种,在使用过程中易干裂、翘曲变形。本研究对中山杉旋切单板的质量进行评价,为中山杉单板类人造板材的开发利用提供依据。测试了单板的厚度偏差、背面裂隙,并用高分辨率三维扫描技术测定了单板的变形程度,研究结果表明:中山杉原木边材部分旋切单板厚度公差为-0.12^+0.15,单板背面裂隙率为49.22%,单板变形程度平均21.18%;心边材转化部分旋切单板厚度公差为-0.17^+0.17,单板背面裂隙率为53.69%,单板变形程度平均28.20%;心材近髓心部分旋切单板厚度公差为-0.38^+0.76,单板背面裂隙率为55.85%,单板变形程度平均40.88%;单板厚度公差、单板背面裂隙率及单板变形程度从小到大依次为边材部分单板、心边材转化部分单板、心材近髓心部分单板。采用无卡轴旋切机旋切出的中山杉单板,其边材至心边材转化部分的旋切单板厚度公差达到LY/T 1599—2011《旋切单板》的要求;单板背面裂隙率小于人工林杨木单板,满足工业生产需求;中山杉单板变形程度大于人工林杨木单板;高分辨率三维扫描技术评价单板变形程度的方法是可行的。
The Taxodium hybrid‘Zhongshanshan’was an excellent species cultivated by artificial hybridization in Institute of Botany,Jiangsu Province and Chinese Academy of Sciences.Based on the characteristics of salt-alkali tolerance,rapid growth and good dry shape of Taxodium mucronatum Tenore,the Taxodium interspecific hybridization experiment and rapid-growing salt-alkali tolerance type selection were carried out.Studies on the wood properties of Taxodium hybrid‘Zhongshanshan’indicated that the average density of wood was small,the wood mechanical strength was low.During the utilization of the Taxodium hybrid‘Zhongshanshan’wood,the deformation was large,which was not conducive to the development and utilization of Taxodium hybrid‘Zhongshanshan’.The quality of veneer directly affects the property and application scope of wood-based veneer panels.The quality of the Taxodium hybrid‘Zhongshanshan’peeled veneer was evaluated,which could provide scientific and theoretical basis for the development and utilization of Taxodium hybrid‘Zhongshanshan’peeled veneers.The logs were cut into veneers,and the veneer thickness was set at 2.00 mm.Some materials during the peeling process were selected respectively,including the sapwood section,the intermediate wood section and the section of the heartwood near piths.Some veneers were cut into several pieces,and then dried naturally to the moisture content of 10%-12%.The thickness deviation and the lathe checks were examined,and the 3D scanning technology was used to measure the deformation of the veneers.The results showed that the thickness deviation of veneers from sapwood was-0.12-+0.15,the lathe checks rate was 49.22%,the average deformation was 21.18%;the thickness deviation of veneer from intermediate wood was-0.17-+0.17,the lathe checks rate was 53.69%,the deformation was 28.20%;the thickness deviation of veneer from heartwood near the piths was-0.38-+0.76,the lathe checks rate was 55.85%,and the average deformation was 40.88%.The thickness deviation,the lathe checks and the deformation of the veneer from small to large were as follows:the part of the sapwood,the part of the intermediate wood,the part of the heartwood near the piths.From sapwood to intermediate wood,the thickness deviation of the Taxodium hybrid‘Zhongshanshan’peeled veneer met the requirements for industrial applications.Compared with the poplar veneer in the plantation,the lathe checks rate of the Taxodium hybrid‘Zhongshanshan’veneer was smaller,meeting the needs of industrial production.Compared with the traditional measurement method,the method of evaluating the veneer deformation by the 3D scanning technology was intuitively and quickly.
作者
朱越骅
潘彪
於朝广
殷云龙
张耀丽
ZHU Yuehua;PAN Biao;YU Chaoguang;YIN Yunlong;ZHANG Yaoli(College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,China;Insitute of Botany,Jiangsu Province and Chinese Academy of Sciences,Nanjing 210014,China)
出处
《林业工程学报》
CSCD
北大核心
2019年第4期47-52,共6页
Journal of Forestry Engineering
基金
江苏省农业科技自主创新资金项目(CX(16)1005)
中国科学院战略生物资源服务网络计划(kfj-brsn-2018-6-003)
关键词
中山杉单板
3D扫描技术
厚度
背面裂隙
变形
Taxodium hybrid‘Zhongshanshan’peeled veneer
3D scanning technology
thickness
lathe check
deformation
