| 圆锯片上热应力及回转应力的分析 |
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| 引用本文： | 李黎,习宝田,杨永福.圆锯片上热应力及回转应力的分析[J].北京林业大学学报,2002,24(3):14-17. |
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| 作者姓名： | 李黎 习宝田 杨永福 |
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| 作者单位： | 北京林业大学工学院 |
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| 摘 要： | 该文运用实验的方法对木材切削加工所用的圆锯片上的温度分布进行了测定,据该温度梯度对圆锯片的热应力进行了详细的分析和计算. 通过实验研究表明,对于未适张锯片,当锯片上的温度梯度达到21℃时,锯片将发生失稳并出现"蛇行".在分析计算了圆锯片回转离心应力后,将锯片上的热应力和回转离心应力进行了叠加,得出锯片发生失稳时的应力分布曲线.对照已有的辊压适张应力测定结果进行分析和比较,辊压适张的应力分布在数值上至少应抵消锯片上的热应力和回转离心应力.因此,实验和分析结果对圆锯片的加热适张和机械适张都有非常重要的指导意义.
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| 关 键 词： | 圆锯片 热应力 温度梯度 适张 |
Thermal and rotary stresses in circular saw blades |
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| Li Li,Xi Baotian,Yang Yongfu. School of Technology,Beijing For. Univ.,P.R.China..Thermal and rotary stresses in circular saw blades[J].Journal of Beijing Forestry University,2002,24(3):14-17. |
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| Authors: | Li Li Xi Baotian Yang Yongfu School of Technology Beijing For Univ PRChina |
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| Institution: | Li Li,Xi Baotian,Yang Yongfu. School of Technology,Beijing For. Univ.,100083,P.R.China. |
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| Abstract: | This paper analyzes and calculates the thermal stress in the blades of circular saws used in cutting wooden pieces based on the detecting of temperature differences. The experiment showed that the circular saw blades were unstable when the temperature difference reached 21℃.The theoretical distribution of thermal and rotary stresses of the circular saw blades was determined depending on the experiment results. The tensioning stress should balance with thermal and rotary stresses in the circular saw blades. Therefore, these results are useful for thermal tensioning and machining tensioning of the circular saws. |
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| Keywords: | circular saws thermal stress temperature difference tension |
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