本研究將針對配置液靜壓軸承的內藏式主軸進行不同溫度下性能模擬與實驗測試。液靜壓軸承相較於傳統接觸式滾動軸承，液體潤滑軸承能克服其阻尼特性較差等問題；內藏式馬達裝配精巧，同軸傳動可更精確控制轉速，兩者之搭配將提高加工水準。
然而液靜壓軸承內部液壓油流經管路與油腔時產生之摩擦功率，與內藏式馬達運轉時產生之散失熱等熱量會直接對主軸造成影響，其溫升不只影響到金屬材質變形，同時也改變軸承內液壓油之黏滯係數數值。從理論上，可得知軸承內油膜變化會影響軸承性能，而熱量則會使主軸產生結構變形。因此透過進行液靜壓內藏式主軸之熱源探討，並搭配實驗驗證相關性能與熱變形，可進一步預測實際狀況之熱量產生，以期能更有效掌控主軸於不同溫度下的性能表現。

Compared with traditional contact bearing, hydrostatic bearing can advance the damping performance and processing stiffness. The precision will also be improved when the hydrostatic bearing is equipped with built-in motor which can control the rotating speed more precisely.
However, the heat power, including friction power produced when the oil flow through the tubes and recesses and motor dissipated heat etc., will affect the performance of spindle directly. The change of temperature not only causes material deformation but also transforms the viscosity coefficient of oil. In theory, the viscosity of coefficient of oil will influences the performance of hydrostatic built-in spindle. Therefore, in the research, it is expected that the calculation of heat source of hydrostatic built-in spindle and validation of experiments could further forecast the heat production, which will be in charge of the performance of the spindle under different temperatures.

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