| 摘要 |
<p>A band saw blade (10) having relatively extended pitch patterns of eight or more teeth exhibits relatively low noise and vibration during cutting operations, and substantially uniform tooh loading characteristics. The band saw blade (10) defines set patterns within each pitch pattern, and each set pattern is defined by an unset leading tooth (12, 18) followed by a plurality of offset trailing teeth (14, 16, 20, 22, 24, 26). Each tooth within each set pattern defines a pitch ("P") between the respective tooth and the preceding tooth in the cutting direction of the saw blade, and an accumulated pitch between the respective tooth and the preceding tooth of like set direction in the cutting direction of the saw blade. The ratio of pitch to accumulated pitch for each tooth within each set pattern increases from one tooth to the next in the direction opposite the cutting direction of the saw blade for substantially uniformly distributing the chip load over the teeth of the saw blade. In addition, during cutting operations, each tooth entering or exiting the work piece defines a different pitch or forcing frequency than does every other tooth simultaneously entering or exiting the workpiece, or successively entering or exiting the work piece, to thereby minimize noise and vibration during cutting operations.</p> |
