Variations of instability in a rotating spindle system with various bearings

• Published in: International journal of mechanical sciences 2003, Vol.45 (1), p.57-72
• Main Authors: Huang, B.W., Kung, H.K.
• Format: Article
• Language: English
• Subjects: Applied sciences; Bearings; Bearings, bushings, rolling bearings; Drives; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Instability; Mechanical engineering. Machine design; Physics; Rotating spindle; Solid mechanics; Structural and continuum mechanics; Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...); Vibrations and mechanical waves
• ISSN: 0020-7403; 1879-2162
• DOI: 10.1016/S0020-7403(03)00039-0

To drive the speed of spindle faster and faster, especially for micro-via-drilling, the gas bearing–spindle is a must. However, most investigations of the dynamic characteristics of the spindle system are limited to the ball bearing type of spindle. This work examines the dynamic instability of a rotating spindle system with various bearings to elucidate the difference between the ball and gas bearing–spindle systems. A round Euler–Bernoulli beam is used to approximate the spindle. The Hamilton principle is applied to derive the equation of motion for the spindle system, and the multiple scales perturbation method is employed to solve the instability solution of the system. The effects of bearing types and speeds of rotation on the dynamic characteristics and instability of a rotating spindle system are further studied.