- 學位論文
適用於滾珠螺桿的潤滑脂磨潤性能研究
The Tribological Performance Study of Lubricating Grease Applied to Ball Screw
摘要
因為滾珠螺桿具有摩擦係數小、定位精度高、壽命長、摩擦係數低、可高速正、逆向轉動、以及可作為直線運動及旋轉運動之變換傳動元件等的特點，所以由產學合作之廠商提供目前廠商正在使用在機台上的油脂，分別以紅外線水分計、流變儀、四球實驗來進行油脂的磨潤性能研究，得到依不同實驗條件下的磨潤性能，經油脂流變變頻掃描黏度證實油脂到了規範所訂之工作溫度時，油脂色澤已明顯變色，黏度也降低甚多，從起始黏度可確定油脂在剛起動時的黏度可達正常轉動時的黏度的數倍以上，並發現每降低10 ℃，最大起始黏度會增加一倍，以烘烤方式證實油脂色澤的變化與所處之溫度有關，故可以用來估計油脂所處的工作溫度，同時發現A油脂在量測脂溫超過100 ℃以上時會開始產生吸附層，至110 ℃時吸附層才會較為穩定。
並列摘要
Ball screw has the characteristics of low friction coefficient, high life cycle and precision, high speed forward and reverse motions. In our study, different kinds of grease provided by the corporative company were experimentally studied. The grease rheological properties, such as the variation of grease viscosity with temperature, pressure, and shear strain rate, were tested by the rheometer. The grease apparent color changes with temperature were investigated to observe the color transformation with temperature. Four-ball tests were conducted to study the tribological performance of the grease. The rheological results show that the starting viscosity is several to more than ten times than that of the viscosity in steady motion. Moreover, the starting viscosity doubles with the every 10°C temperature elevation in the temperature range between 10 to 30°C. The color change is more obvious from normal to dark if the baking temperature reaches the maximum recommended working temperature. The absorptive layer were found to exist as the measured grease temperature is higher than 100°C and became dynamically balanced gradually as the grease temperature is with the range of 100°C and 110°C.