- 學位論文
運用可靠度工程以分析車床主軸結構的穩定度
Using Reliability Statistics to Analyze The Stability of The Lathe Spindle Structure
摘要
現今各種產業對產品之品質要求越來越高，因此相對著對工具機的精度亦日益提升，造成我們不停的去思考如何提高工具機的精度問題，以車、銑床為例影響其精度的有主軸的迴轉、床台的移動、機台的穩定度…等等眾多因素，本文即主要探討工具機中之車床主軸結構設計問題，並針對A廠商的主軸設計進行實驗和可靠度分析，以提供廠商作為改良的依據和參考。 目前A廠商的問題在於希望主軸的運轉能夠更趨於穩定，因此如何預防主軸失效，並減少主軸故障的發生，同時在主軸發生故障時也能夠迅速的找到原因。一般影響主軸精度的主要因素有溫度、預壓剛性、伸長量和變形量等，文中以可靠度工程對車床主軸在回轉中進行溫升、動態、預壓等之實驗檢測，再根據實驗數據值加以分析，結果顯示影響主軸運轉不穩定的因素中，動平衡占的比例為最高，所以我們提出先對動平衡進行校正，同時亦對動平衡校正方式與解決方案不斷的修正，以提升該主軸精度的改善效果。 主軸在回轉中若不平衡，便容易直接影響加工的精度，或是軸承壽命，同時由實驗驗證結果也知道主要針對主軸的平衡問題進行改善，便可解決重量不均、膨脹問題、外環直徑誤差等眾多問題，可見本研究方法可迅速找到問題並針對問題提供解決方案，研究結果即可提供廠商作為改良的參考。
並列摘要
Machine tool is an indispensable work of many machine tools, including vehicle industry、ship manufacturing、railway、electronic industrial machinery、 aircraft …etc。Not only increasing the accuracy requirements of the product，but also the accuracy requirements of the machine tool relative increase resulting that think about how we could improve the accuracy of machine tools。 This paper focuses on structural design problems machine tool spindleand experimental analysis of a spindle original design manufacturers to provide improved according to the manufacturer . A current problem is to find manufacturers spindle operation is not stable, and therefore how to prevent failure of the spindle and the spindle to reduce the incidence of failures, but also be able to quickly find out which part of the spindle failure. In this paper, namely the use of reliability engineering Spindle conducted on temperature, dynamic, pre-press, etc. experimental testing and measurement, and then analyzed according to the experimental data values and found that these factors affect the accuracy of the spindle, the proportion accounted for balancing is the highest, so we first major improvement for balancing, you can get quite a significant improvement.