臺灣博碩士論文加值系統

本研究針對綜合加工機曲面加工時,所產生的熱誤差及加工動態誤差進行
補償,在切削 的過程中,使用熱誤差即時量測補償單板系統,以減少切削
中工具機結構本身熱變形所 產生的熱誤差,並透過綜合加工機為自動檢測
設備,結合英國 Renishaw 公司的接觸式掃瞄探頭,對加工後曲面進行線
上(On-Line)量測,將量測後所得3D曲面資料與原始的設計曲面(CAD
Surface), 以B-Spline 曲面方式建構後,再根據最小平方法與最佳化理
論,將量測曲面與設計曲面進行誤差比對,以分析出加工後曲面的形狀誤差
,並利用所分析的誤差數據來建立一新的補償曲面, 以工具機機上高速輪
磨的加工方式,對補償曲面進行補償加工,期能將影響加工誤差的因素給以
克服, 使加工後之工件精度提高,並獲得表面粗度較佳的工件, 以減少後
續工件平滑化(Smoothing)加工對人工的依賴.
本文發展一套 CAD/CAM/CAC 之整合系統,將工件之設計,製造,檢驗,誤差
補償及線上輪磨等程序整合為一體, 以期達成快速量測,高精度加工,自動
化生產為目地.

The factors that have influenced on the accuracy of
manufacture in CNC machine tool mainly come from the machine
thermal deformation and dynamic cutting error during the cutting
period.
In this research , we use the hardware compensation board that
compensates thermal error real-time by external commands to
shift the zero point of the machine coordinate
system to reduce the machine spindle thermal
deformation. To reduce
the dynamic cutting error , we employ the scanning probe
(SP2)to inspect the dynamic cutting error of a part
surface. The real surface date obtained from the
scanning probe are compared with the CAD geometric
data in least -squares method and some
optimization algorithms to analyze the shape error of the curved
surfaces . The analytic results are then used to modify the
shape error for generating the compensation tool-
path commands for form error compensation. Furthermore , the
compensated tool-path is converted to the NC
programs for driving the grinder to reduce the form error and to
btain better surface roughness .
This research develops an CAD/CAM/CAC(Computer-aided
compensation) integrated system that includes scanning
probe , air-pressured grinder and sharp error analysis
system with a CNC machining center to reach the goal of
fast measurement and high accuracy of curved surfaces.