Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/97151
標題: CNC車床主軸頭之公差分析與調配探討
A Study on Tolerance Analysis and Adjustment for The Spindle Head of A CNC Lathe
作者: 許長裕
Chang-Yu Hsu
關鍵字: 主軸頭系統;公差分析;製程公差成本函數;成本貢獻度;spindle head system;tolerance analysis;cost-tolerancing model;contribution analysis of cost
引用: [Wade, 1967] O.R. Wade, Tolerance Control in Design and Manufacturing, Industrial Press, New York, 1967. [BjØrke, 1989] O. BjØrke, Computer-Aided Tolerancing, 2nd ed. ASME Press, 1989. [He, 1991] J.R.He, “Tolerancing for Manufacturing via Cost Minimization,” International Journal of Machine Tools Manufacturer, Vol.31, 1991, pp.455-470. [Tsai, 1993] J.-C. Tsai, Tolerance Reasoning for Concurrent CAD/CAM Systems, Ph. D. Dissertation, Stanford University, 1993. [蔡志成等人,1995] 蔡志成、鄭國德與張宗義,計算機輔助幾何公差分析(二),國科會研究計畫報告,1995。 [侯靖男,1996] 侯靖男,公差分析與公差敏感度分析在產品設計之應用,國立中興大學機械工程學系碩士論文,1996。 [Creveling, 1997] C.M. Creveling, Tolerance Design, Addison-Wesley, New York, 1997. [Ramani et al., 1998] B. Ramani, S. H. Cherachi and J. M. Twomey, “CAD-Based Integrated Tolerancing System,” International Journal of Production Research, Vol.36, No.10,October, 1998, pp.2891-2910. [Diplaris&Sfantsikopoulos, 2000] S. C. Diplaris and M. M.Sfantsikopoulos, “Cost-Tolerance Function.A New Approach for Cost Optimum Machining Accuracy,” International Journal of Advanced Manufacturing Technology, Vol.16, Issue 1, 2000, pp.32-38. [Jeang, 2001] A. Jeang, “Combined Parameter and Tolerance Design Optimization with Quality and Cost,” International Journal of Production Research, Vol.39, No.5, 2001, pp.923-952. [蕭志峰,2001] 蕭志峰,具尺寸公差之方型工件最低成本製程規劃研究,國立中興大學機械工程學系碩士論文,2001。 [黃政德,2009]黃政德,最低加工成本之組裝公差配置-以工具機主軸為例,國立中興大學機械工程研究所碩士論文,2009。 [吳尚融,2012]吳尚融,工具機主軸組裝公差分析與調配之探討,國立中興大學機械工程研究所碩士論文,2012。 [涂國豪,2014]涂國豪,工具機主軸尺度公差分析與最佳化配置,國立中興大學機械工程研究所碩士論文,2014。 [徐富庭,2014]徐富庭,工具機旋轉工作台定位機構之最佳化公差配置研究,國立中興大學機械工程研究所碩士論文,2014。 [Kyocera, 2003]京瓷公司,加工技術資料,京都陶瓷有限公司,2003,p.R33-R34。 [Janpoy, 2011] janpoy,研磨加工原理,網路資料,2011,https://wenku.baidu.com/view/bf164635ee06eff9aef807d7.html。
摘要: 
主軸是工具機的關鍵組件,所以要求的精度很高,然而主軸也需要穩固精確的安裝,故組裝的精度也要一併要求,才能達成預期的精度目標,進而降低組裝成本,本研究即針對CNC車床主軸的主軸頭系統,探討其組件設計模式,並對此組裝進行公差分析與調配。文中除進行組裝公差分析之外,並建立一針對該主軸系統之公差成本模型,透過公差與成本的敏感度分析及貢獻度分析進行進一步的公差調配,使其符合精度要求的同時,又能降低加工成本。
此外本研究發展出一套以時間及公差係數為基底的製程公差成本函數,透過估價數據建置不同加工方式對應之公差係數,然後透過各項製程的加工路徑,計算單一尺寸所需的加工時間,並將所使用的機具設備、刀具配件、夾治具、人事成本、行政等成本,整合計算所需的製程單位成本,再依據對應的公差係數,據以計算加工此尺寸所需的加工費用,供設計者在設計零組件時評估公差加工費用的成本計算方法。
本研究主要的貢獻在於建置以時間及公差係數為基底的製程公差成本函數用以計算公差加工成本,同時運用公差敏感度分析搭配成本貢獻度分析進行公差調配,使整體主軸頭系統符合精度要求,並降低加工成本。

Spindle is the key component of a machine tool thus requires high precision. In addition to the precision of the spindle, firm and accurate assembly also play important roles in its final precision. This study is aimed toinvestigating tolerance analysis and adjustment in the assembly of the spindle head system for a CNC lathe. A cost-tolerance model dedicated for this spindle is constructed. Sensitivity and contribution analysis of each tolerancing specification and corresponding fabrication cost, in addition to tolerance analysis, are employed for adjusting tolerancing of the spindle in order to ensure it satisfies precision requirement with lower fabrication cost.
For estimating fabrication cost, cost-tolerancing models for different fabrication processes are developed based on cost estimation data from engineering practice. Machining cost can be estimated using the developed cost model through calculating machining time and cost coefficientcorresponding to the machining process. Machining time is calculated from material removal as well as process parameters while fabrication cost is estimated according to processequipment, tool accessories, fixture, labor as well as administration and other costs. Based on this model, a computer spread sheet is also developed for the designer to estimate the fabrication cost in tolerancing design.
The main contribution of this study is to build cost-tolerancing model using machining time and the cost coefficient for estimating fabrication cost. This model, together with sensitivity analysis and contribution analysis, provide an approach for tolerancing design of a spindle that satisfies precision requirement with lower fabrication cost.
URI: http://hdl.handle.net/11455/97151
Rights: 同意授權瀏覽/列印電子全文服務,2020-08-25起公開。
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