STATIC STIFFNESS ANALYSIS OF HIGH FREQUENCY MILLING SPINDLE

Anandkumar Telang

Abstract: Compared with conventional spindles, motorized spindles are equipped with a built-in-motor, so that power transmission devices such as gears and belts are eliminated. This design also reduces vibrations and achieves high rotational balance, and enables precise control of rotational accelerations and decelerations. The objective of this work is to optimize the parameters influencing the stiffness of the high frequency milling spindle running at 12000 rpm with power rating of 10 KW. Theoretical analysis has been carried out to evaluate the spindle stiffness and to minimize deflection at the nose by varying the following parameters: (i) Bearing arrangement, (ii) Overhang of spindle nose from the front bearing, (iii) Spindle diameter between the bearings. The static analysis was also carried out using ANSYS and there is a good correlation between the results obtained by theoretical approach and ANSYS

Keywords: FREQUENCY MILLING

DOI: https://doi.org/10.15623/ijret.2014.0315108