圆锯片横向变形与加工表面锯痕高度

由于锯片与锯切工件之间的摩擦引起锯片边缘温度升高，对圆锯片进行适张处理提高了锯片的横向刚度和动态稳定性.该文应用远红外温度传感器测试锯片沿半径方向的温度分布，两个激光位移传感器分别测量了锯片在外边缘模拟加热条件下锯片的横向变形和锯切工件上的锯痕高度，研究分析了不同温度分布、转速、进给速度、径向槽分布和适张状态下锯片横向变形与锯痕高度的关系.结果表明，当锯片外边缘受热发生热压曲变形后，锯片在锯切表面残留的锯痕波峰高度明显增大，锯切质量下降；锯片外缘开径向槽和锯片经适张处理后，使锯片外缘的热变形明显减小，并使锯片在锯切加工表面残留的锯痕波峰高度降低. 

Transverse deflection of circular saw and sawing profile on workpiece.

The increase in temperature at the edge of saw blade is caused by heating due to the friction between saw blade and the cutting surface of woodpiece. Saw tensioning raises the transverse stiffness and dynamic stability of a saw blade. An infrared thermometer was used in this experiment to detect the temperature difference from flange to edge along the radius of the saw blade when it was heated. Two laser displacement sensors were also used to detect transverse deflection of the saw blade and sawing profile on the woodpiece. Differences in transverse deflection and the sawing profile on woodpiece were observed and studied in this paper at varied temperature differences, under different rotation speeds, and distinct distribution of slots for both tensioned and untensioned saws. The results show that the height of sawing profile on woodpiece increases when the edge of saw blade is heated and thermal buckle beginning. The thermal deflection at the edge of saw blade and the height of sawing profile on woodpiece reduce when saw blade is tensioned or with different slots at the edge.