The effect of a belt position in the spindle driving system on critical rotational speeds
Journal Title: Annals of WULS, Forestry and Wood Technology; Zeszyty naukowe SGGW - Year 2016, Vol 95, Issue 1
Abstract
The effect of a belt position in the spindle driving system on critical rotational speeds. The aim of this paper was to examine how the belt pulley position affects critical rotational speeds of the modernized spindle of the sliding table saw Fx3. Methodology of determination of critical rotational speeds of the spindle in a function of the spindle design features and its driving system is presented. Spindles in these kind of machine tools are mainly driven with V-belts, and the pulleys on the spindles might be positioned: usually on the rear end, between bearings or on the spindle nose between a circular saw blade and the fore bearing. Numerical computations with the FEM (Finite Element Method) of the spindle deformations were carried out for five case studies of the position of the force acting on the pulley. The obtained results revealed that the average ratio value of a critical rotational speed to the maximum rotational speed ncr / nmax = 2.414 fulfills the literature recommendations. Keywords:
Authors and Affiliations
KAROL DUCHNICZ, KAZIMIERZ A. ORLOWSKI
Keywords
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