Roll-tensioning effects on natural frequencies in circular sawblades for
woodcutting were investigated. Adequate knowledge of these effects will
enable a more precise and repeatable tuning of natural frequencies,
which will ease manufacturing and maintenance of sawblades. With
natural frequencies tuned to not create resonance under running
conditions, longer running times and more accurate cutting are made
easier. The aim of this study was to find the optimum, or most suitable,
tensioning parameters for a series of tested circular sawblades and also
to draw general conclusions. The effects of the magnitude of the roller
load, number of grooves, and groove positions were tested. The
magnitude of the roller load was measured by using a universal load cell.
The roll-tensioning effects were evaluated by measuring the shift in
natural frequencies of several vibration modes. Finite element analysis
was performed to model natural frequencies. The magnitude of the roller
load, number of grooves, and groove positions all affected the natural
frequencies. Natural frequencies obtained with the finite element method
were in good agreement with the experimental test results.