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竹材磨削表面粗糙度与胶合强度关系的研究
贺宏奎1, 李浩东2, 傅 鹏2
1.中北大学 体育与艺术学院;2.北京林业大学 木材科学与工程北京市重点实验室
摘要:
【目的】分析影响竹材磨削表面粗糙度的因素以及表面粗糙度与胶合强度的关系,为竹材胶合加工工艺的选择提供参考依据。【方法】采用探针法等,测定不同粒度(60,80,100,150和180目)砂带磨削加工后竹材的表面粗糙度、表面自由基数量和表面接触角,对磨削加工试件进行胶合强度试验,分析表面粗糙度、表面自由基和表面接触角等对胶合强度的影响。【结果】磨削砂带粒度过小和过大时,胶合强度均较低。本试验条件下,砂带粒度为100目时,磨削竹材的胶合强度最高(7.19 MPa),表面润湿性也最好。此时,表面粗糙度评价指标轮廓算术平均偏差(Ra)、微观十点不平度(Rz)和轮廓微观不平度平均间距(Sm)分别为7.2,50.7和130.8 μm,表面自由基数量为3.3×104 g-1,表面接触角约15°。【结论】竹材胶合加工表面磨削时选择100目的砂带较为合理。
关键词:  竹材  磨削  砂带粒度  表面粗糙度  胶合强度
DOI:
分类号:
基金项目:国家“十一五”科技支撑计划项目(2006BAD18B09)
Study on the relationship between bonding strength and roughness of sanding bamboo surface
Abstract:
【Objective】The study analyzed the factors effecting the roughness of sanding bamboo surface and the relationship between glue bonding strength and the roughness for a reference to bamboo processing.【Method】The roughness,free radical & contact angle in surface of Moso Bamboo (Phyllostachys pubescens) sanding with different granularity (60,80,100,150 &180#) abrasive belt was measured and analyzed with various factors.And the bonding strength of them was tested according to corresponding standard.【Result】The bonding strength of the bamboo piece sanding with different granularity abrasive belts is various and not in linear increase with the decrease of surface roughness.The strength reaches top(7.19 MPa) when the bamboo piece is sanded by granularity 100# abrasive belt with Ra,Rz & Sm for 7.2,50.7 and 130.8 μm respectively,free radical quantity 3.3×104 g-1 and contact angle around 15°.【Conclusion】A suitable selection of abrasive belt granularity is 100# for bamboo sanding to glue bonding.
Key words:  bamboo  sanding  granularity of abrasive belt  surface roughness  glue bonding strength