Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/1865
標題: CNC工具機熱變位補償控制技術
The Thermal Compensation Technology on CNC Machine Center
作者: 吳建郎
Wu, Chien-Lang
關鍵字: Thermal error;熱誤差;Real time compensation;Shift the zeropoint;即時補償;原點漂移
出版社: 機械工程學系所
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摘要: 
熱的問題一直是影響工具機精度的主因,由於工具機朝向高速高精度的加工需求,使得此問題更加突顯。為了改善此一問題,本研究針對主軸熱誤差建立一套線上即時補償系統,並以實例驗證本系統之可行性。
首先於工具機設置溫度與變形量量測系統,對空切削與實切削進行量測,蒐集溫度變化量與熱變形量之數據,利用多變數迴歸的方式分析其相關性,以最具相關性之溫度點建立補償預估模型。
並發展一套低功耗、高計算效能、低成本,以微處理器為核心的補償模組,負責補償模型運算以及與CNC控制器溝通,利用CNC控制器外部機械原點漂移的方式,將補償值輸入控制器,以達到減少熱誤差的目的。經由實例驗證,本補償方法可有效的將誤差值抑制在15μm以內。

Thermally induced errors have been significant factors influencing machine tool accuracy. In order to alleviate this phenomenon, a real time compensation for spindle thermal error is presented. And the feasibility of this approach is also implemented.
This study presents the process of thermal error testing. Analyze the issues of spindle thermal displacement upon the temperature, and build a spindle thermal displacement model by using multiple regression method. A microcontroller module is developed to deal with the model and communicate with the CNC controller, and compensate for the CNC controller by shifting the zero point of the machine coordinate system. After practical experiment, the results show that the errors can effectively restrain the thermal errors within 15μm.
URI: http://hdl.handle.net/11455/1865
其他識別: U0005-1907200703443800
Appears in Collections:機械工程學系所

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