Noise Characteristics of Tungsten Circular Blade During Sawing of Medium Density Fiberboard

This work deals with the noise generated from sawing processes of medium density fiberboard, where special attention was given to the changes in sawing noise at different cutting conditions when using circular saws with varied radial slots. The experimental results gave the following insights: The noise level in idling is positively related to the spindle speed. According to the noise power spectra, whistling noise is found during sawing processes, which is mainly caused by self-excited vibration of saw, and it had directivity. Furthermore, the radial slots have a different positive contribution to the noise reduction during idling, but has limited effect on the noise in cutting. In order to reduce the noise pollution induced by sawing, it was proposed to use circular saws with radial slots and copper plugged in its bottom for sawing of medium density fiberboard, in respect to low noise level and avoiding whistling noise.

The Mechanical Property Analysis of Circular Saw Blades under Different Rotational Speeds

The rotational speed is an important parameter during the cutting of circular saw blades. It affects the stress distribution, the vibration and the whistling noise of the saw blade. It also has an influence on the cutting accuracy and the useful life of saws. In this paper we analyze the mechanical properties of the circular saw under different rotational speeds. The mechanical properties we investigate include the stress distribution, the critical stress, the natural frequency and the vibration amplitude.