Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/1779
標題: 高精度車床熱誤差及補償研究
Compensation Control of Thermal Deformation on A High Precision Turning Center
作者: 何俊龍
Ho, Chung-Lung
關鍵字: thermal error;熱誤差;compensation;thermal deformation;raise of temperature;補償;熱變形;溫升
出版社: 機械工程學系
摘要: 
降低CNC工具機的誤差,提高產品的精度,從而增加產品的附加價值,為
本研究之主要目的。本研究針對影響車削中心加工精度達40%∼70%的溫
升熱變形誤差,提出經濟、精確且快速的量測方法。並藉此方法證明靜態
空轉與實切削環境熱誤差量之差異。導以迴歸分析來建立熱誤差模型,配
合回授訊號的傳輸,以實際線上補償方法,改善車削中心溫升熱變形之問
題,提升加工精度。研究中,溫度量測單元以智慧型溫度感測器AD590,
配合調校電路,以研華公司812 A/D卡做資料擷取、轉換後由個人電腦存
檔。位移量測單元以RENISHAW公司之LTO2S位移量測儀進行線上實際量測
。量測所得之溫度點、熱誤差值以多變數線性迴歸與非線性自然指數迴歸
模組分別建立二者之關係式。最後提出以位移量測儀硬體方式與溫度、熱
誤差關係之軟體方式之補償方法。由實驗驗證,軟體補償方法能將車削中
心之熱誤差值控制在5μm,且以自然指數迴歸模組所得之溫度、熱誤差關
係式進行軟體補償能將誤差值減至40﹪。

The reduction of the thermal errors of a CNC machining
Center isthe major work in this research. However, the purpose
of producingthe accuracy products and increase the machine value
are conducted at last. The evidence shows 40 to 70% of
total error are caused by machine''''s thermal drift. It is
important to develop a method to fill the thermal drift, which
associated with a changing temperature distribution within the
structural loop due to internal and external sources. The
statistical regression analysis is used to establish the thermal
drift model. With the feedback control algorithms, the
mathematical model can be used as a compensation matter on-line
to improve the thermal drift problem. In this research, an
IC type with intelligence thermal sensor, AD590, is used.
Thermal sensors with the ADVANTECH 812 A/D converter and the
personal computer constructed as a data acquisition system. The
displacements caused by the thermal drift are measured by using
LTO2S displacement gauge, which is a product of RENISHAW for
lathe. The mathematical models, which are function of
temperature varying and thermal displacement, are established
based on the multi-variable regression and nonlinear regression
statistical methods. The advancing compensation methods that
include hardware and software methods are conducted in this
research. With the experiments, the results showed the research
design with software compensation method can control the thermal
drifts within 5mm.
URI: http://hdl.handle.net/11455/1779
Appears in Collections:機械工程學系所

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