Abstract: The effects of the location, number and stiffness of guide pads
on the lowest critical rotational frequencies of the rotating
circular saw damped at the inside and free at the perimeter are
discussed by the non-linear theory and the perturbation theory
of structural vibration analysis. The influence of the
centrifugal force and the cutting temperature are considered in
the course of the analysis. The results of the analysis and the
calculation show that the introduction of one guide does not
stably raise critical rotational frequencies of the circular
saw. The two guides can raise lowest critical rotational
frequency of the circular saw then the angle between the two
guides fixed on the direction of the circumference satisfies the
certain conditions.
Key words: Guide
pad Circular saw Critical rotational frequency
*
This project
is supported by Provincial Young Foundation of Jilin (No.953512-2).
Manuscript received on August 7, 2000; revised manuscript December
28, 2000
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