- 學位論文
螺桿摩擦熱溫升變化研究
Study of Temperature Distribution of Ball Screw Friction Heat
摘要
台灣在精密工業發展上一直是擁有世界等級的水準，台灣目前也是世界排名第三的滾珠螺捍桿製造廠，滾珠螺桿因工具機運轉而產生熱摩擦變形是影響精度誤差之主要來源，為了解熱變形過程，藉由紅外線熱影像儀去量測各種不同變數的滾珠螺桿溫度上升情況，並使用熱電偶觀察冷卻油溫度變化，最後完成滾珠螺桿整體之熱分析。 為了了解滾珠螺桿系統在運轉過程中的溫度變化，本文中之實驗包含:有無開啟冷卻油、轉速3000rpm至900rpm、負載2400kgf至60kgf、有無使用拋光螺帽固定、不同預拉安裝機台。實驗方法以熱電偶觀察輸出入口油溫變化，及使用紅外線熱影像分析儀觀察滾珠螺桿在各種不同參數下摩擦熱變化。 實驗結果發現影響螺桿溫升情況由大致小排列順序為(1)有無使用油冷卻系統(2)轉速(3)負載。拋光螺帽及不同預拉對滾珠螺桿溫度上升情況並無明顯之影響。油冷卻系統影響螺桿溫度上升最大原因在於螺桿為中空，冷卻油不斷在螺桿中間運轉作強制排熱效果，所以散熱效果最明顯。轉速由於平台和螺桿不斷的來回摩擦情況下，高轉速和低轉速螺桿溫升變化差也很明顯。負載增加了平台重量也增加了螺桿溫升。使用拋光螺帽鎖住平台和安裝機台時使用不同預拉則對螺桿溫度上升影響變化不大。
並列摘要
Precision industrial development in Taiwan has a grade level of the world, Taiwan is currently the world number three ball screw defend rod factory, ball screw due to the operation of the machine tool to produce heat friction deformation is the main source of continuous improvement degree of error, in order toantipyretic deformation process, the ball screw temperature rise by the infrared thermal imagers to the measurement of various variables, and use a thermocouple to observe the temperature of the cooling oil, and finally to complete the thermal analysis of the whole of the ball screw. In order to understand the temperature of the ball screw system during operation, the experiment in this article includet: with/without cooling oil, speed from 3000rpm to 900rpm, from load 2400kgf to 60kgf, with or without polishing the nut fixed, different pre-Ann units installed. Experimental methods to the thermocouple to observe the output of inlet oil temperature changes, and the use of infrared thermal imaging analyzer to observe the ball screw friction heat changes in various parameters. The experimental results show that the impact screw temperature generally small order for (1) with/without oil cooling system (2) speed (3) load. Polishing nuts and pre-stretched there is no obvious effect of the temperature rise of the ball screw. The oil cooling system screw temperature increased the maximum because the screw is hollow, the cooling oil continue to screw the middle of operation to force the heat effect, so the cooling effect is most obvious. Speed due to the platform and continue to screw the case back and forth friction, high speed and low speed screw temperature changes in the difference is obvious. Load increased the weight of the platform also increases the screw temperature rise. The use of polishing nut to lock the platform and install the machine to use a different pre-pull screw temperature rise changes.