高精密機(jī)床所生產(chǎn)的產(chǎn)品的加工精確高度依賴于電主軸的性能,軸承預(yù)緊力作為影響高速電主軸性能的重要因素之一,為高速運(yùn)轉(zhuǎn)的主軸系統(tǒng)提供了必要?jiǎng)偠�。選擇適當(dāng)?shù)妮S承軸向預(yù)緊力,既可以為電主軸提供所需的剛度,減少高速旋轉(zhuǎn)產(chǎn)生的振動(dòng),又能避免加工時(shí)產(chǎn)生過度的熱量。因此,研究和分析軸承預(yù)緊狀態(tài)及其與電主軸動(dòng)態(tài)特性的關(guān)系,對(duì)提高高端數(shù)控機(jī)床主軸的回轉(zhuǎn)精度和動(dòng)態(tài)性能具有重要意義。本文首先研究了軸承滾動(dòng)體與滾道的接觸特性隨預(yù)緊力的變化規(guī)律。利用赫茲接觸理論,研究了軸承基本幾何關(guān)系和不同預(yù)緊載荷條件下及角接觸球軸承接觸剛度和接觸變形。提出了一種確定不同軸承軸向預(yù)緊力下接觸電阻的新方法,并進(jìn)行了角接觸球軸承接觸電阻的實(shí)驗(yàn)研究,結(jié)果表明,隨著軸承軸向預(yù)緊力的增大,接觸電阻減小,呈現(xiàn)“L”型趨勢(shì),二者且具有非線性關(guān)系。對(duì)于具體軸承,當(dāng)預(yù)緊力大于某一值時(shí),接觸面積不再隨預(yù)緊力的增大而明顯增大。隨后,本文研究了背對(duì)背安裝角接觸球軸承對(duì)的軸向預(yù)緊力對(duì)轉(zhuǎn)子回轉(zhuǎn)精度的影響。設(shè)計(jì)了實(shí)驗(yàn)測(cè)試臺(tái)架,考慮了軸承內(nèi)圈與軸的配合狀態(tài),測(cè)試了軸承外圈徑向跳動(dòng)隨軸向預(yù)緊力的變化規(guī)律。結(jié)果表明,隨著預(yù)緊力增大,徑向跳動(dòng)呈現(xiàn)“降-升-降”,最后... 

【文章來源】：上海交通大學(xué)上海市 211工程院校 985工程院校 教育部直屬院校

【文章頁數(shù)】：104 頁

【學(xué)位級(jí)別】：碩士

【文章目錄】：
摘要
ABSTRACT
Chapter1 Introduction
    1.1 Background and Sources
        1.1.1 Background
        1.1.2 Sources
    1.2 Literature review
        1.2.1 Structure of High-Speed Motorized Spindle
        1.2.2 Research status
    1.3 Research objective and chapter arrangement
        1.3.1 Research objective
        1.3.2 Chapter arrangement
Chapter2 High-speed motorized spindle bearing preload and contact characteristics
    2.1 Angular contact ball bearing
        2.1.1 Angular contact ball bearing geometry
        2.1.2 Angular contact ball bearing preload analysis
    2.2 Bearing Contact analysis and stiffness calculation
        2.2.1 Hertz Contact theory
        2.2.2 Contact deformation and stiffness calculation
    2.3 Bearing contact resistance analysis
        2.3.1 Four terminal sensing system
        2.3.2 Bearing contact resistance measurement
        2.3.3 Contact resistance measurement experiment
    2.4 Chapter summary
Chapter3 High-speed motorized spindle bearing preload and rotational performance analysis
    3.1 High-speed motorized spindle bearing preload
        3.1.1 Bearing preload design and clamping load distribution
        3.1.2 Factors affecting the bearing preload
    3.2 Measurement of bearing preload
        3.2.1 Evaluation of fixed position preload from starting torque and preload relationship
        3.2.2 Measurement of constant pressure preload
    3.3 Analysis of spindle assembly parameters relation with bearing preload
        3.3.1 Bearing radial deformation under shaft bearing interference fit and preload
        3.3.2 Bearing radial clearance and runout measurement
    3.4 Chapter summary
Chapter4 Dynamic characteristics analysis of high-speed motorized spindle
    4.1 Free vibration analysis of high-speed motorized spindle shaft
        4.1.1 Rigid and flexible shaft
        4.1.2 Finite element analysis of spindle shaft
        4.1.3 Experimental analysis of shaft free vibration
    4.2 Modal analysis of the high-speed motorized spindle under different preload condition
        4.2.1 Experimental modal analysis
        4.2.2 Modal Experiment Frequency spectrum analysis
    4.3 Vibration analysis of the high-speed motorized spindle
        4.3.1 Vibration experiment under different preload
        4.3.2 Vibration frequency spectrum analysis
    4.4 Dynamic parameters for preload optimization
    4.5 Chapter summary
Chapter5 Summary and prospect
    5.1 Summary of the thesis
    5.2 Innovative points
    5.3 Future work
第6章 全文總結(jié)與展望
    6.1 論文主要內(nèi)容與結(jié)論
    6.2 論文創(chuàng)新點(diǎn)
    6.3 后續(xù)研究展望
References
Acknowledgement
Academic achievements


【參考文獻(xiàn)】：
期刊論文
[1]溫度變化對(duì)成對(duì)角接觸球軸承定位預(yù)載的影響[J]. 岳紀(jì)東,楊虎,李鴻亮.  軸承. 2009(05)
[2]過盈配合量和預(yù)緊力對(duì)高速角接觸球軸承剛度的影響[J]. 王碩桂,夏源明.  中國(guó)科學(xué)技術(shù)大學(xué)學(xué)報(bào). 2006(12)
[3]高速精密角接觸球軸承最小預(yù)緊載荷計(jì)算[J]. 蔣興奇,馬家駒,范谷耘.  軸承. 2001(06)
[4]精密機(jī)床主軸軸承的預(yù)緊力控制[J]. 郭明,陳宗農(nóng),王慶九.  工程設(shè)計(jì). 2001(02)
[5]軸承使用時(shí)的預(yù)緊情況分析[J]. 王雪清.  軸承. 2001(02)
[6]角接觸球軸承預(yù)緊量的計(jì)算及選擇[J]. 賈群義.  軸承. 1996(01)



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