Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/1788
標題: 高精度工具機熱誤差補償技術
Thermal Error Compensation Technology on A High Precision CNC
作者: 謝宗哲
Shieh, Fzong-Jei
關鍵字: Machine Tool;工具機;Thermal Error Compensation;Single Chip;熱誤差補償;單晶片
出版社: 機械工程學系
摘要: 
在強調加工自動化的電腦數值控制工具機中,影響其加工精度的因素
主要來自工具機本身幾何誤差以及切削期間結構受熱所產生的熱誤差,因
此工具機熱誤差補償技術在近年來逐漸受到重視。雖然熱誤差即時補償技
術在實驗室以及工業產品設備上已經成功的驗證,但是在廣泛使用前仍有
一些問題需要解決,例如:最佳的溫度量測點、建模時間過長以及成本過
高。 本論文針對工具機熱誤差補償技術的一些問題進行研究分析,發
展單板電腦熱誤差補償系統以及快速熱誤差建模技術。以面銑刀加工中碳
鋼,IC型數位溫度感測器偵測溫度變化,標準桿配合觸發式探頭進行實切
削溫昇熱變形模型建立。將實驗結果以複迴歸分析建立切削中熱誤差預測
模型。使用Intel 8051單晶片發展熱誤差補償控制系統,透過工具機原點
漂移的方式進行加工中熱誤差即時補償。 實際切削實驗的結果顯示,
此補償系統可將主軸熱變形由60 um降至±10 um以內。

The factors that influence the machining accuracy of
Computer Numerical Control (CNC) machine tool mainly come from
the geometric errors and structural thermal deformation during
cutting. Hence, people pay attention to thermal error
compensation technology on a CNC machine tool recently.
Although real-time thermal error compensation techniques have
been successfully demonstrated in both research laboratories and
industrial sites, there are still some major barriers before
widespread application are possible such as optimal thermal
sensor placement, the long period time required to build the
thermal error model, and expensive. In this thesis, a stand-
alone hardware with INTEL 8051 single chipmicrocomputer is built
in for real-time thermal compensation technology. The face
milling cutter with indexable insert throw away tip is used to
create faster temperature rising than end miller. An IC type
digital thermometer is designed to detect the temperature
variation. These thermal errors of Z axis are measured on-line
by the touch trigger probe and a standard bar. A mathematical
model is then derived ,based on the sensed temperature variation
and the errors by multi-variable regression analysis. And
thermal error compensation command is send to CNC controller to
shift the zero point of the machine coordinate system in real-
time phase. The experimental results show that the technology
can successfully improve machining accuracy from 60 um to 10
um in real cutting condition.
URI: http://hdl.handle.net/11455/1788
Appears in Collections:機械工程學系所

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