الفهرس 
AcknowledgmentOnly 14 pages are availabe for public view
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Abstract
The spindle of a machine tool plays a vital role in production operation. It holds, locates, drives and workpiece and/or the cutting tool with the stiffness and accuracy. Thereby, its static dynamic performance should be carefully studied and construction should be given the worth attention.
In the course of the cutting operation, machine
tool spindle is usually subjected to complicated loading conditions, which in most cases, lead to the generation of self-induced ~ibration, and the spindle system, under such conditions, behaves as a vibratory system. Whirling is considered as one type of self-induced vibration.
The whirling features deviate the spindle system from
the preselected true running conditions. These deviations. in turn may deteriorate thespi-ndle assigned functions.
The main goal of this work is confined to the study
of the whirling phenomenon inherent to the spindle system in the running conditions. This is to identify its features, effects and influencing parameters. The effects of all these factors could be easily visualized by tracing the spindle system deflection curve under the various working conditions. These curves, on the other hand,
will provide the designer with ~ good tool to investi¬gate and correct the errors that ma~ transfer to the pro¬duced work piece.
A step-by-step mathematical technique is adopted for The mathematical technique used is thoroughly presented. The adaptation of the same tech¬~e to the study and evaluation of the effects of the ~ing and driving forces will be also included.
To fulfil the goal of this work, five chapters and appendices are presented. In these chapters/ the det¬prescribed goal are outlined.
The main conclusions drawn from the presented study
1- within theconsidered ranges, the rotational and whirl¬ingspeeds have slight effects on the design of the spindle system.
2- the mose deflection is reduced by decreasing the spind¬le span and/or overhang length. Accordingly, they should be kept as minimum as possible.
3-It is advantageous to mount the driving qear as near as possible to the rear bearing.
4-Decreasing the flexibility constants for the same span a~ overhang yields an appreciable improvement of spindle performance.
5. The quality of the workpiece is improved when using a face plate as a workpiece holding device.
6. The maximum nose deflection generally occurs in the vertical plane.