增强圆竹握钉力性能的方法及其试验研究  

Methods and Experimental Study on Enhancing Screw Withdrawal Strength of Round Bamboo

作　　者：曾诗轶 顾燕妮 卢嘉楷 许斌 ZENG Shi-yi;GU Yan-ni;LU Jia-kai;XU Bin(College of Materials Science and Engineering,Nanjing Forestry University,Nanjing,Jiangsu 210037,China)

机构地区：[1]南京林业大学材料科学与工程学院,江苏南京210037

出　　处：《林业机械与木工设备》2022年第2期57-61,66,共6页Forestry Machinery & Woodworking Equipment

基　　金：安徽省科技重大专项项目(18030701150)。

摘　　要：为探讨增强圆竹握钉力性能的方法及其影响因素,采用硬泡聚氨酯和精刨竹片对圆竹进行填充增强处理的方法,使其成为实心致密结构。利用正交实验方法探究不同配比的填充材料与导孔直径大小对增强圆竹握钉力性能的影响。研究结论表明,随着填充材料中的竹材含量增加,构件的握钉力逐渐增加。随着导孔直径增加,握钉力呈下降趋势。当导孔直径小于2 mm时,螺钉拧入过程中易发生外侧原竹筒轴向劈裂。同时,在拧入螺钉时可使用导向块规等辅助装置,避免由拧入角度偏差等误差带来的影响;所有螺钉均能完整拔出,破坏形式包括螺钉拔出破坏和圆竹劈裂破坏两种形貌。上述以期为圆竹结构钉连接形式与性能的优化设计及其工程应用工作提供有益的技术支撑。In order to explore the methods and influencing factors to enhance the screw 1withdrawal strength of round bamboo, the round bamboo was filled and reinforced with rigid polyurethane foam and finely planed bamboo pieces to make it a solid and dense structure.The effects of different proportion of filling materials and guide hole diameters on the screw withdrawal strength of round bamboo were studied by means of an orthogonal experiment.The results show that with the increase in the bamboo content in the filling materials, the screw withdrawal strength of the component increased gradually.With the increase in the diameter of the guide hole, the screw withdrawal strength decreased.When the diameter of the guide hole was less than 2 mm, axial splitting of the outer bamboo tube is prone to occur during the screwing process.At the same time, auxiliary devices such as guide block gauge could be used in the screwing process to avoid the influence caused by errors such as screwing angle deviation;all screws could be pulled out completely,and the failure forms included screw pull-out failure and round bamboo splitting failure. The above is expected to provide useful technical support for the optimal design of the connection form and performance of round bamboo structural nails and their engineering application.

关 键 词：圆竹 握钉力 填充增强处理 导孔直径 试验研究 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]