Research On Squeeze-Film Damping For Precision Hole Machining

Based on the results of previous research about the Squeeze-Film Damper technology, this paper applied it to the process of precise boring to enhance the process quality. The Squeeze-Film Damper principle and its characteristic parameters were analyzed in this paper, and based on the previous research, the experimental technology and simulation calculation were combined to seek the affect rule of the characteristic and parameters of the Squeeze-Film Damper. The Damper was designed based on the acquired conclusion and has been used in spot process. This paper is mainly composed of the following parts:1. Reviewing the previous research results briefly, referring sufficient domestic and overseas materials and many research results expounded in this field. Based on it, the research purpose is stated.2. The operating principle of damper and the formative mechanisms are expounded, and the calculating formula of damp coefficient is deduced with the methods of mathematics and hydrodynamics, which lays a foundation for theoretical analysis and experimental research.3. All kinds of special effects and influencing factors of Squeeze-Film are analyzed, and the result shows that every hypothesis in theoretical analysis is correct. Parts of the conclusions lay a foundation for the damper design.4. Setting up a dynamics model of damping system of damper, and programming with the MATLAB language to calculate and analyze the damping system.5. Combining the experimental research about damper and simulation calculation to analyze the characteristic of the damper, and at the same time analyzing and summarizing the damping effects influenced by several main parameters of damper. Validating the reliability of damping calculationmethod and simplified model of the cutter spindle through analysis.6. Base on the above, summarizing the design gist of the damper and supplying the structure figure which can be used in practical machining. Through the field test, The Squeeze-Film Damper shows good performances in the practical precise-boring machining, which enhances the quality of boring machining greatly.