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The Static and Dynamic Analysis of the Machine Tool’ Spindle System and Its Optimization

Author: MaShi
Tutor: ZhangJinGuo
School: Harbin Institute of Technology
Course: Mechanical and Electronic Engineering
Keywords: Spindle Bearing Static characteristics Dynamic characteristic Finite Element
CLC: TG659
Type: Master's thesis
Year: 2010
Downloads: 265
Quote: 3
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Abstract


The latest achievements in the integrated application of modern CNC machine tools for mechanical design and manufacturing technology , computer technology , automatic control technology , the development of the trend toward high-speed, high - precision , complex , flexible , etc. . The spindle system static and dynamic characteristics is one of the main reasons that affect the machining accuracy , the finite element software used in machine design process , help to improve the efficiency and design of the machine level . Use of finite element analysis software ANSYS the spindle system analysis , including : (1 ) established in ANSYS spindle system with three-dimensional model of the angular contact ball bearings , contact analysis , the bearing rolling element bear under a load displacement contours plotted the stiffness of the bearing curve, were compared and the analysis of the stiffness of the stiffness of the results obtained with the Hertz contact algorithm calculation . Plots the relationship between the bearing preload bearing stiffness curve . ( 2 ) the establishment of a three-dimensional finite element model of the spindle system with combin14 the unit simulation bearings unit spindle system static analysis , get the spindle static stiffness . (3) spindle system dynamics analysis , including modal analysis and harmonic response analysis . Modal analysis has been the fourth-order natural frequency of the spindle , calculate the critical speed of the spindle . Harmonic response analysis of the displacement of the spindle shaft itself versus frequency curve . ( 4 ) of the spindle system optimized design . Finite element model to establish the parameters of the spindle system to the spindle volume optimization objective function, design variables to the spindle each ladder segment length , outer radius , static deformation front spindle , the first natural frequency of the state variables of the spindle system optimized design , the spindle system quality lightest , and has good static and dynamic performance .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal cutting and machine tools > Program control machine tools, CNC machine tools and machining
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