分別使用對角線和步進對角線兩種測量方法,通過測量機床工作臺不同直線的定位誤差來確定三軸數(shù)控加工中心的空間誤差。到目前為止,空間誤差測量方法的相關(guān)研究已經(jīng)日漸成熟,但缺少針對對角線和步進對角線測量方法所得平均空間誤差的研究分析。本文基于對角線和步進對角線測量方法提出一種實驗誤差分析方法;采用步進對角線測量方法,通過英國Renishaw公司的XL-80型激光干涉儀,分別測量六種不同路徑的定位誤差,再利用實驗誤差分析方法得出不同路徑相應(yīng)的空間誤差。對角線和步進對角線測量方法的起點和終點相同,并且分別給出了詳細的測量方法。為了對比測量結(jié)果,本文建立了一個數(shù)學(xué)模型;通過實驗測量得出對角線測量方法的平均空間誤差小于步進對角線測量方法,直線測量誤差隨機床工作臺測量點位置和高度的變化而變化;結(jié)果表明,對角線測量方法優(yōu)于步進對角線測量方法。實驗結(jié)果的目的是為了更好的了解和廣泛應(yīng)用兩種空間誤差測量方法對應(yīng)的平均空間誤差分析方法。 

【文章來源】：廣東海洋大學(xué)廣東省

【文章頁數(shù)】：108 頁

【學(xué)位級別】：碩士

【文章目錄】：
Abstract
摘要
1 Introduction
    1.1 Problem Statement
    1.2 Thesis Outline
2 Research Background
    2.1 Literature Review
    2.2 Machining systems and a machine tool
    2.3 3-axis and5-axis machine tool
    2.4 Error,Accuracy and Resolution of a Machining System
    2.5 Error Budget
    2.6 Sources of Errors
        2.6.1 Error Classification
        2.6.2 Geometric Errors
        2.6.3 Kinematic Errors
        2.6.4 Thermal Errors
        2.6.5 Force-Induced Errors
        2.6.6 Other Errors
    2.7 Error Elimination Methodologies
        2.7.1 Error Avoidance or Precision Design
        2.7.2 Error Compensation
        2.7.3 Compensation Techniques
3 Measurement Methods
    3.1 Direct Measurement Method
        3.1.1 The Lase-Based Measurement Method
        3.1.2 The Gravity-Based Measurement Method
        3.1.3 Material-Based Measurement Method
    3.2 Indirect Measurements
        3.2.1 Artifacts Based Measurements
        3.2.2 Contour-Based Measurements
        3.2.3 Indirect Measurement From Direct Measurement Apparatus
    3.3 Error Measurement Devices
        3.3.1 Ball Bar
        3.3.2 Laser Tracker
        3.3.3 Laser Interferometer
    3.4 Line Methods and Shortcomings in Line Methods
        3.4.1 9-Line Measurement Method
        3.4.2 12-Line Measurement Method
        3.4.3 13-Line Measurement Method
        3.4.4 14-Line Measurement Method
        3.4.5 15-Line Measurement Method
        3.4.6 22-Line Measurement Method
        3.4.7 Diagonal Measurement Method
4 Mathematical Modeling of a Machine Tool
    4.1 Geometric Errors of a Machine Tool
        4.1.1 Inaccuracies Due to Geometric Errors
        4.1.2 Geometric error component
    4.2 Homogeneous Transformation Coordinates System of a Machine Tool and Carriage
    4.3 Derivation of Error Models of3-axis Vertical Machining Center(VMC1000p)
5 Experiment Methodology
    5.1 Specification of a Machine tool
    5.2 Laser System Components for Experiment Setup
        5.2.1 Renishaw’s Software Package
        5.2.2 XL Laser Head
        5.2.3 Tripod And Stage
        5.2.4 Height Adjustment
        5.2.5 XC Environmental Compensation Unit,Temperature Sensor and Material Temperature Sensor
        5.2.6 Mounting Kit for Attaching the Optics to Machine
        5.2.7 Linear Measurement Optics
        5.2.8 Swivel Mirror for Diagonal Measurement
    5.3 Linear Measurement Apparatus Setup
    5.4 Experimental Measurement by Using a Laser Interferometer
    5.5 Diagonal and Step-Diagonal Measurement
    5.6 Measurement by the Interferometer
        5.6.1 Diagonal Path Measurement
        5.6.2 Step-Diagonal or Path Measurements
6 Results
    6.1 Measurement Results
    6.2 Cosine Error,Abbe’s Offset Error,Dead Path Error And Other Errors
    6.3 Diagonal Measurement
    6.4 Step-Diagonal or Path Measurement
        6.4.1 Ax,Bx Line Measurement(Table7,Table8 )
        6.4.2 Ay Line Measurement(Table7)
        6.4.3 Az,Cz Line Measurement(Table7,Table9)
        6.4.4 By,Ey Line Measurement(Table8,Table11)
        6.4.5 Bz Line Measurement(Table8)
        6.4.6 Cx Line Measurement(Table9)
        6.4.7 Cy,Dy Line Measurement(Table9,Table10)
        6.4.8 Dx,Fx Line Measurement(Table10,Table12)
        6.4.9 Dz Line Measurement(Table10)
        6.4.10 Ex Line Measurement(Table11)
        6.4.11 Ez,Fz Line Measurement(Table11,Table12)
        6.4.12 Fy Line Measurement(Table12)
    6.5 Figures of Different Paths Measurement
    6.6 Mean error values of Diagonal and Step-diagonal measurements
    6.7 Mean error graphs of forward and reverse deviation
7 Conclusion and Future Framework
    7.1 Future work
Appendix
References
Acknowledgement


【參考文獻】：
期刊論文
[1]Research on volumetric error compensation for NC machine tool based on laser tracker measurement[J]. WANG JinDong & GUO JunJie State Key Laboratory for Manufacturing Systems Engineering,Xi’an Jiaotong University,Xi’an 710049,China.  Science China（Technological Sciences）. 2012(11)
[2]Error modeling, sensitivity analysis and assembly process of a class of 3-DOF parallel kinematic machines with parallelogram struts[J]. 黃田,李亞,唐國寶,李思維,趙興玉,David. J. Whitehouse,Derek G. Chetewyn,Xianping Liu.  Science in China（Series E:Technological Sciences）. 2002(05)



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