径向槽对硬质合金圆锯片"啸声"影响的研究

"啸声"是木工硬质合金圆锯片空转的主要噪声源,是一种自激振动噪声.本文主要研究径向槽对硬质合金圆锯片噪声的影响.研究结果表明,采用金属铜填塞径向槽底部圆孔技术,可以消除硬质合金圆锯片在整个测试转速范围的"啸声".而其他两种普通径向槽的圆锯片只能在较高转速下消除"啸声".此外,径向槽底部塞有金属铜圆锯片的空气动力性噪声比未塞有金属铜的圆锯片略低2～3 dB(A).

Research on the Effect of Radial Slots on Whistling Noise of Tungsten Carbide Circular Saw Blades

Whistling noise is the dominant noise source of a tungsten carbide circular saw blade,which is due to the self-excited vibration.This paper designed four different blade bodies(without radial slots,with four milled radial slots,with four laser-cut radial slots,and with four radial slots with copper cork).The results of the noise-measuring showed that the saws with copper corks did not emit a whistling noise in the rotational range,the other two different saws with four slots only eliminated whistling noise at the high rotational speeds.In addition,the aerodynamic noise of the saws with four milled slots with copper corks was 2-3dB(A) lower than the aerodynamic noise of the saws with four milled slots without copper corks.