Analysis of Vibration in a Bandsaw System

Rising raw material cost in recent years compels the industry to improve wood sawing practices and efficiency. Bandsaw vibration causes poor cutting performance which costs the forest products industry millions of dollars annually. Optimal control of vibration requires fundamental understanding of the dynamic characteristics of the entire bandsaw system. In this research, the dynamics of the entire band mill system have been studied. Observations of band vibration during testing of a full-scale industrial band mill and a table-top research bandsaw showed dynamic coupling between the cutting and noncutting regions of the bandsaw blade. The coupling mechanism has been uncovered analytically and experimentally in this research. An accompanying mathematical model of a bandsaw system vibration has also been proposed and analyzed by the finite element method. Further, verification of the model was carried out by modal testing techniques. The coupling phenomena create a significant opportunity for controlling vibration in the cutting region of band mills by damping and vibration control applications on the noncutting region of the blade.

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