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    杨雅琦, 汪生莹, 耿金光, 刘炀, 张健, 罗斌. 水曲柳磨削的砂带磨损机理研究[J]. 北京林业大学学报, 2019, 41(8): 138-146. DOI: 10.13332/j.1000-1522.20190136
    引用本文: 杨雅琦, 汪生莹, 耿金光, 刘炀, 张健, 罗斌. 水曲柳磨削的砂带磨损机理研究[J]. 北京林业大学学报, 2019, 41(8): 138-146. DOI: 10.13332/j.1000-1522.20190136
    Yang Yaqi, Wang Shengying, Geng Jinguang, Liu Yang, Zhang Jian, Luo Bin. Abrasive belt wear mechanism of sanding Manchurian ash[J]. Journal of Beijing Forestry University, 2019, 41(8): 138-146. DOI: 10.13332/j.1000-1522.20190136
    Citation: Yang Yaqi, Wang Shengying, Geng Jinguang, Liu Yang, Zhang Jian, Luo Bin. Abrasive belt wear mechanism of sanding Manchurian ash[J]. Journal of Beijing Forestry University, 2019, 41(8): 138-146. DOI: 10.13332/j.1000-1522.20190136

    水曲柳磨削的砂带磨损机理研究

    Abrasive belt wear mechanism of sanding Manchurian ash

    • 摘要:
      目的砂带磨削是木材加工行业的一项重要工艺。分析砂带磨削过程中的砂带磨损机理及其对材料去除率、磨削表面质量的影响,旨在进一步完善木材切削理论,推动新型砂带研发制造。
      方法本研究以水曲柳为实验材料,通过测定磨削过程中的试件质量变化和表面形貌,就砂带磨损对试件材料去除率和表面粗糙度的影响进行分析,结合试件材料去除率、磨削过程中砂带的质量变化和表面形貌探究砂带的磨损机理,并采用灰色模型预测磨削长度与材料去除率、磨削表面粗糙度之间的定量关系。
      结果横纹磨削时,材料去除率整体大于顺纹磨削的材料去除率。整体而言,材料去除率与砂带质量随磨削次数的增加而不断减小,试件表面粗糙度呈先增大后减小的趋势。磨削过程中,砂带磨粒出现磨损、破碎以及脱落的现象,造成砂带质量不断减小,磨粒等高性逐渐增加。顺纹方向磨削对砂带磨粒的磨损大于横纹方向磨削。磨粒磨损程度越大,材料去除率越小。当材料去除率降低至3%时,可认为已基本达到砂带使用寿命。
      结论磨削过程中,等高性越差,材料去除率越高。随磨削次数增加,砂带材料去除能力不断下降,试件表面粗糙度则呈先增大后减小的趋势。均值GM(1,1)灰色预测模型的平均模拟相对误差都在20%以内,适用于水曲柳砂带磨削过程中磨削长度与材料去除率、表面粗糙度之间的预测。

       

      Abstract:
      ObjectiveSanding is a high-precision and efficient wood material processing technology. The study analyzed the wear mechanism of the abrasive belt during the sanding process and explored the effects of abrasive belt wear on the material removal rate and the sanded surface quality. And the aim is to further improve the basic theory of wood cutting and the development of advanced belt manufacturing technology, so as to realize the intelligence and automation of wood processing.
      MethodIn this research, Manchurian ash (Fraxinus mandshurica) was used as experimental material. In order to analyze the effect of abrasive belt wear on material removal rate and surface roughness, the mass change and the surface morphology of the test piece were measured experimentally. The wear mechanism of the abrasive belt was explored by calculating the material removal rate and measuring the surface topography of the abrasive belt. In addition, the grey model was used to predict the quantitative relationship between sanding length and material removal rate, and also surface roughness.
      ResultDuring transverse sanding process, the material removal rate was less than that of longitudinal sanding. Overall, the material removal rate and the quality of abrasive belt decreased with the increase of sanding times, and the surface roughness of the workpiece increased first and then decreased. During the sanding process, abrasive grains of abrasive worn, broken and peeled off, which resulted in the mass of abrasive belt decreasing and the height of abrasive grains tending to be the same.
      ConclusionIn the sanding process, the abrasive wear caused by transverse sanding is greater than that caused by longitudinal sanding, and the material removal rate decreases with the increase of abrasive wear. When the material removal rate is reduced to 3%, it can be considered to end the service of the abrasive belt, which means the abrasive belt should be replaced in time. In the sanding process, the worse the contour of abrasive particles is, the higher the material removal rate is. With the increase of sanding times, the removal capacity of abrasive belt material decreases. The relative error of predictive average simulation using grey model mean GM (1,1) is within 20%, so it is suitable for predicting the relationship between sanding length and material removal rate, and also surface roughness in the process of sanding Manchurian ash.

       

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