臺灣博碩士論文加值系統

本研究探討臥式車床主軸系統熱傳現象以及散熱流道設計的分析。首先根據臥式車床主軸在運轉的情況之下所產生的熱源(迴轉油壓缸、軸承、主軸皮帶輪)進行車床主軸系統的熱傳模擬，探討這些熱源在車床主軸系統所產生的溫度場與熱變形的現象，以及對整體車床主軸系統結構熱變位之影響。因案例的主軸套管並無散熱流道的設計，所以本研究接著以模擬模型在主軸套管上設計內部往復式散熱流道，希望利用油冷機將冷卻液注入散熱流道進而適當地控制溫度的變化。本研究所探討的散熱流道設計參數為流道孔徑(ψ6mm,ψ8mm,ψ10mm)、流道數量(4流道、6流道、8流道)與質量流率(0.0851kg/s, 0.1134kg/s, 0.1417kg/s)，搭配田口法配對出9組不同的流道設計參數。接著使用有限元素分析軟體ANSYS進行分析模擬，藉由分析結果得知有流道設計的熱變形較無流道設計的套管明顯減少，並且根據模擬結果的統計分析，得知8流道-ψ8mm孔徑-0.0851kg/s質量流率為熱變位最小的設計參數。本研究成果與研究方法可作為工具機主軸冷卻系統設計分析與優化的參考。

The main purpose of this study is to analyze the heat transfer phenomena and the design of the cooling channel of a lathe spindle system. Heat sources including (rotary hydraulic cylinder, bearings, spindle pulley) were included in the current study. Based on numerical simulation results, the temperature variation, the thermal deformation and structure thermal displacement were discussed. To improve the thermal deformation a cooling channel design on the spindle system was tested numerically. Parameters of the cooling channel investigated are: channel diameter: ψ6mm,8mm,10mm, number of channels: 4 channels, 6 channels, 8 channels, and mass flow rate of coolant: 0.0851 Kg/s, 0.1134 Kg/s, 0.1417 Kg/s. According Taguchi method, nine sets of combinations of the above design parameters were determined and investigated via simulation. From the numerical results, it is concluded that the best parameters for the cooling channel design in the current study is 8 channels,ψ8mm in diameter, and mass flow rate of 0.0851 kg/s. The method and results of the current study can provide a useful reference for design and optimization of cooling channels in spindle system.

致謝 i
中文摘要 ii
Abstract iii
圖目錄 vi
表目錄 ix
第1章 緒論 1
1.1 前言 1
1.2 文獻回顧 2
1.3 研究目的與動機 6
第2章 理論分析 8
2.1 ANSYS 運算理論 8
2.1.1 能量方程式 8
2.1.2 連續方程式 9
2.1.3 動量方程式 9
2.2 熱源的分佈與計算 11
2.2.1 主軸馬達熱源 11
2.2.2 主軸皮帶輪熱源 12
2.2.3 主軸軸承熱源 12
2.2.4 迴轉油壓缸熱源 15
2.3 田口方法 16
2.3.1 直交表 17
2.3.2 S/N比(S/N Ratios) 18
第3章 車床主軸系統有限元素模擬分析 19
3.1 有限元素分析 19
3.2 3D幾何圖形 19
3.3 邊界條件 24
3.3.1 熱源 24
3.3.2 冷卻液 26
3.3.3 區域空氣流場 26
3.4 模擬分析流程 27
第4章 模擬結果與討論 29
4.1 無流道車床主軸系統 29
4.1.1 無流道車床主軸系統溫度場 30
4.1.2 無流道車床主軸系統流場 31
4.1.3 無流道車床主軸系統熱變形與熱變位 33
4.2 有流道車床主軸系統 35
4.2.1 有流道車床主軸系統溫度場 35
4.2.2 有流道車床主軸系統流場 41
4.2.3 有流道車床主軸系統熱變形與熱變位 52
第5章 結論 59
Reference 60

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