[1]张吉荣,高颖*,徐霖,等. 落叶松为基材的木榫旋转焊接性能及机理研究[J].西北林学院学报,2017,32(4):229-234.[doi:10.3969/j.issn.1001-7461.2017.04.38]
　ZHANG Ji-rong,GAO Ying*,XU Lin,et al. Properties and Mechanism of Larch with Wood-dowel Rotation Welding[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2017,32(4):229-234.[doi:10.3969/j.issn.1001-7461.2017.04.38]
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 落叶松为基材的木榫旋转焊接性能及机理研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第32卷
期数:
2017年第4期
页码:
229-234
栏目:
出版日期:
2017-07-31

文章信息/Info

Title:
 Properties and Mechanism of Larch with Wood-dowel Rotation Welding
文章编号:
1001-7461(2017)04-0229-06
作者:
 张吉荣; 高颖*; 徐霖; 罗翔亚; 朱旭东
 （北京林业大学 木质材料科学与应用教育部重点实验室，木材科学与工程北京市重点实验室，北京 100083）
Author(s):
 ZHANG Ji-rong; GAO Ying*; XU Lin; LUO Xiang-ya; ZHU Xu-dong
 (Beijing Forestry University,MOE Key Laboratory of Wooden Material Science and Application,Beijing Key Laboratory of Wood Science and Engineering,Beijing 100083,China)
关键词:
 ; 木榫旋转焊接; 落叶松; 抗拉拔强度; 刚度; 预钻孔径; FTIR
Keywords:
 ; wood-dowel rotation welding;  larch;  pullout resistance;  stiffness;  pre-drilling diameter;  FTIR
分类号:
S781.21
DOI:
10.3969/j.issn.1001-7461.2017.04.38
文献标志码:
A
摘要:
 选取国产落叶松为木榫旋转焊接基材，对其抗拉拔性能及反应机理进行研究。通过对基材上不同预钻孔/木榫直径比抗拉拔试验，以及木榫直接敲入方式的抗拉拔的对比试验，研究了各因素对焊接性能的影响，并将其结果与欧洲云杉基材进行比较。通过FTIR对落叶松焊接基材情况下木榫及焊接界面进行了化学机理分析。结果表明，木榫旋转焊接落叶松基材的抗拉拔强度与弹性阶段刚度均明显高于欧洲云杉基材；不同预钻孔径对落叶松基材的抗拉拔强度影响不大，但对欧洲云杉影响较大；木榫旋转焊接能够极大提高木榫与基材连接节点的抗拉拔强度，其中落叶松基材提高了416%，而欧洲云杉仅提高了177%。FTIR表明木榫旋转焊接过程中纤维素、半纤维素、木质素发生热解与熔融，冷却后形成高强度的焊接界面。
Abstract:
 In order to study the pullout resistance properties and reaction mechanism of wood-dowel rotation welding,this paper discussed the effects of different pre-drilling diameters and difference between hammered method.Larch was selected as the research object and was compared with European spruce welding substrate.The chemical mechanism of the wood-dowel and joint interface was studied by FTIR.The test results indicated that the larch showed higher pullout resistance strength and stiffness than European spruce.The different pre-drilling diameters had little effect on the pullout resistance of larch substrate,but a significant impact on European spruce.Application of wood-dowel rotation welding could greatly improve the pullout resistant strength of the joint.The larch substrate increased by 416%,while European spruce increased by 177%.FTIR analysis indicated that heat degradation of cellulose,hemicellulose and lignin ocurred during the process of wood-dowel welding by high-speed rotation finally it formed a high-strength weld interface.

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备注/Memo

备注/Memo:
 收稿日期：2016-10-31修回日期：2017-01-03
基金项目：国家林业局林业公益性行业科研专项：低质人工林木材家具制造关键技术研究与示范(201404502)；北京市支持中央在京高校共建项目：户外木结构景观建筑材料特性及应用研究（2015GJ-01）；北京林业大学热点追踪项目(2016BLRD03)。
作者简介：张吉荣，女，在读硕士，研究方向：木质复合材料。E-mail:zhangjirong@bjfu.edu.cn
*通信作者：高颖，女，博士，副教授，研究方向：木质结构和木质复合材料。E-mail:gaoying@bjfu.edu.cn
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