- 學位論文
新式噴射拋光滾珠螺桿及螺帽內螺旋表面之研究
A Study on the Novel Method for Polishing the Inner Surface of Ballscrews and Nuts by Injection Process
摘要
摘要 高精密工業對於產品的品質、精密度以及使用壽命皆必須有相當的要求；在機械元件中致動器通常是耗損能量與影響精密度的主因。由於滾珠螺桿及滾珠螺帽被大量運用於高精密工作母機的移動平臺致動器上，是高精密工業重要的關鍵組件。基於能源及加工時間上之成本考量，高轉速滾珠螺桿及滾珠螺帽的需求大增，在此操作條件下，單憑潤滑油膜是無法完全防止磨耗的產生，因此必須從高性能滾珠螺桿及滾珠螺帽之開發研究著手，推出更高精度及更高效能之產品已是不可避免的趨勢，開發高精度高效能之滾珠螺桿及滾珠螺帽實為提升相關產業界競爭力之當前要務。 本研究團隊過去已成功發使用蓄壓的方式來進行滾珠螺桿內螺旋表面的拋光，但是本研究團隊也發現蓄壓法具有三項缺點存在：(1)模具與試件容易產生干涉(2)所需磨料需較濃稠，導致成本提高(3)製造彈性較小。因此本研究進一步以新式噴射法拋光滾珠螺桿及滾珠螺帽內螺旋表面。藉由控制主軸轉速、磨料濃度、噴射時間、旋轉方向、及磨料粒徑等參數，探討對滾珠螺桿及滾螺帽內螺旋表面粗糙度之影響，並找出最佳的參數組合，並觀察實驗前後之表面形貌，以了解各項參數對於工件表面之影響。
並列摘要
ABSTRACT The quality and the accuracy are very important for the high accurate mechanical engineering. The actuator always significantly influences the energy loss and the accuracy. Therefore, the ballscrews and nuts play an important role when it was used in the actuator of the machine. Moreover, the high speed ballscrews and nuts are attracted recently due to the manufacturing cost down. However, the oil film usually failed under this condition. Therefore, it is very important for Taiwan to establish the key technology of the high precision and high speed ballscrews and nuts in the future. Hydrodynamic polishing the inner surfaces of ballscrews had been successfully investigated by the author. However, there were three defects raised: (1) Interference, (2) Cost up, (3) Elasticity of production. Therefore, a novel method of using the injection for polishing the inner surfaces of ballscrews and nuts was investigated in this paper. The working time, the ceramic particle concentration and the rotation speed were selected as the experimental parameters. According to the results of surface roughness, a novel method of using the injection for polishing the inner surfaces of ballscrews and nuts can be investigated deeply.