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各种锯切条件(包括锯条速度、初拉力、锯材厚度以及诸如弓背度和锯条适张度这类修锯参数)对锯条横向和扭转振动固有频率的影响,已用实验方法进行了研究。经修整具有弓背度和适张度的锯条,在锯切时其横向和扭转固有振动频率要比未经辗压的无弓背度锯条的大。当上、下锯轮间的锯条垂线处于工件和锯条接触线上时,被锯切的工件的上角是锯切时产生横向和扭转运动的锯条分段的两条分界线之一。锯条的跨度相同时,无论是未经辗压的无弓背度锯条,还是只有弓背度的锯条,锯切时其扭转固有振动频率均比空载时低。未经辗压的无弓背度锯条,锯切时和空载时的横向固有振动频率数值相同;但对只有弓背度的锯条,锯切时的横向固有振动频率则比空载时的高。摩擦生热对经辗压的无弓背度锯条的扭转固有振动频率有影响。然而,摩擦热并不影响被试验的各种锯条的横向固有振动频率。
The effects of various sawing conditions (including saw blade speed, initial pull force, sawn timber thickness, and sawing parameters such as bow back and blade fit) on the natural frequency of the transverse and torsional vibration of saw blades have been studied experimentally . After trimming saw blade with bow back and fit, the natural frequency of transverse and torsional vibration during sawing is larger than that of non-bowed backless blade. When the saw blade between the upper and lower saw wheels is perpendicular to the contact line between the work piece and the saw blade, the upper corner of the sawed workpiece is one of the two demarcation lines of the saw blade section that produces lateral and torsional movements during sawing. Saw blade span the same, whether it is without rolling no bow back blade, or only the back of the bow saw blade sawing torsional natural vibration frequency lower than the no-load. The unvulcanized bowless saw blade has the same value of transverse natural frequency when sawing and no-load. However, for saw blades only with bow back, the transverse natural frequency of sawing is higher than that of no-load . Frictional heat affects the natural frequency of torsional oscillations of a rolled bowless backsaw blade. However, the frictional heat does not affect the transverse natural frequency of the various saw blades tested.