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    Please use this identifier to cite or link to this item: http://ccur.lib.ccu.edu.tw/handle/A095B0000Q/133


    Title: 多軸加工機組裝誤差量測與補償方法
    Authors: 程冠傑;CHENG, GUAN-JIE
    Contributors: 機械工程系研究所
    Keywords: 機台迴轉軸;誤差模擬;工具機;B-C rotary table;kinematic error;assembly error;machine tool
    Date: 2018
    Issue Date: 2019-05-23 12:52:39 (UTC+8)
    Publisher: 機械工程系研究所
    Abstract: 多軸加工機是目前正在急速發展的工具機種,在組裝後的多軸加工機,由於旋轉軸的中心軸線難以量測,旋轉後產生的運動誤差更是難以檢測與校正。本論文提供一個模擬多軸工具機的動靜態誤差方法,以座標轉換矩陣方法,由基座出發視為固定端,依照機台各軸堆疊方式同時設定各軸動件的動作與所走的加工路徑之誤差,每個軸皆以總行程定義其路徑的誤差軌跡;在旋轉軸方面則設定其各方向的靜動態偏擺誤差。將機台路徑誤差以多項式方式定義,含常數項表示為靜態誤差,總共建立108個誤差係數,分別代表各軸進給時在六個自由度方向的動、靜態路徑誤差。模擬本文中座標轉換矩陣與誤差多項式使用探頭量測與循圓量測器去量測旋轉軸上的靜態誤差與動態誤差在量測件的變化與循圓量測器桿長變化。本論文為了解決旋轉軸誤差,最後以旋轉軸各項誤差與運動的方式,來設定24項誤差參數,直接算得靜態誤差與運動誤差,以驗證數據處理的理論與可行性,模擬結果證實能確實計算出各項設定的誤差項。
    The 5-axis CNC machine is widely used in the metal-cutting of workpiece with complex geometry. However, the manufacturing and assembly errors of the rotating axes of the 5-axis machine are difficult to be measured and compensated by CNC software later on. In this thesis, a methodology for estimating the assembly and kinematic errors for the rotating axes in the B-C configuration. The assembly and kinematic error of the 3 linear axes (X, Y, Z) of 5-axis CNC machine are assumed to be measured by the Laser linear measuring instrument and perfectly corrected by the homogenous coordinate transformation matrix in the CNC controller and the assembly and kinematic error of linear axes are neglected in this study. In this thesis, we develop a methodology combining the double-ball bar and the coordinate measuring on certain standard parts to estimate the assembly and kinematic errors of the B-C rotary table. Based on the estimated assembly and kinematic errors, homogeneous coordinate transformation matrix from machine base to the workpiece are derived and verified in the numerical examples. There are at least 24 assembly and kinematic errors for the B-C rotary table and each error is represented as a polynomial function. With specified double-ball bar setups and motion paths, totally 108 coefficients of error polynomials are approximately fitted by the least-square-error method. Several numerical examples are presented to verify the validation of the proposed methodology for estimating and compensating the assembly and manufacturing errors of the B-C rotary table.
    Appears in Collections:[機械工程學系] 學位論文

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