【正文】 目錄 摘要 ................................................................................................................................ 1 ABSTRACT ........................................................................................................................ 2 第一章 緒論 ................................................................................................................... 3 研究的目的和意義 ................................................................................................... 3 國內(nèi)外研究現(xiàn)狀 ..................................................................................................... 4 主要研究內(nèi)容 ......................................................................................................... 5 第二章 Pro/E 及 3D 建模 .................................................................................................. 6 Pro/E 簡介 ............................................................................................................... 6 CK1416 數(shù)控車床主軸 3D 建模 ................................................................................. 7 第三章 ANSYS 簡介及機床主軸熱特性有限元建模 .......................................................... 8 ANSYS 簡介 ........................................................................................................... 8 ANSYS 熱分析類型 ................................................................................................ 8 有限元熱分析基礎(chǔ) .................................................................................................. 8 建立 ANSYS 分析模型 ............................................................................................ 12 第四章 主軸的溫度場分析 ........................................................................................... 21 機床熱變形理論 ................................................................................................... 21 軸承發(fā)熱量計算 ................................................................................................... 22 主軸系統(tǒng)熱傳遞方式及性能參數(shù)確定 ..................................................................... 26 主軸系統(tǒng)溫度場分布 ............................................................................................. 27 本章結(jié)論 ............................................................................................................... 30 結(jié)論與展望 ................................................................................................................... 32 參考文獻 ....................................................................................................................... 33 致謝 .............................................................................................................................. 34 1 摘要 現(xiàn)代機械 造向著高效率、高速度、高質(zhì)量和高精度發(fā)展，數(shù)控車床加工已逐漸成為加工業(yè)的發(fā)展方向，并成為提高國際競爭能力的關(guān)鍵技術(shù)。機械加工精度的提高也是產(chǎn)品質(zhì)量控制的重要環(huán)節(jié)， 其中， 機床主軸系統(tǒng)的熱變形是影響機床加工精度的主要原因之一，因此機床主軸系統(tǒng)的熱設(shè)計在機床設(shè)計中占據(jù)重要地位， 針對主軸在高速運動的過程中產(chǎn)生大量的熱量使主軸溫度升高，導致主軸變形，從而影響加工精度這一不利因素，因此有必要對主軸熱變形進行大量研究，提出補償措施，提高數(shù)控機床的加工精度。其研究內(nèi)容如下： 1. 建立機床主軸的三維 CAD 模型， 通過模型可以形象生 動的顯示出數(shù)控車床主軸的結(jié)構(gòu)。 2. 在分析機床主軸內(nèi)部熱源的基礎(chǔ)上，建立機床主軸溫度場的有限元分析模型?；谟邢拊獙C床主軸溫度進行了詳細的分析，為 CK1416 數(shù)控機床主軸的熱變形奠定了基礎(chǔ)。 3. 利用 ANSYS 強大的熱分析功能，對車床主軸進行參數(shù)化建模并設(shè)置好參數(shù)， 得出穩(wěn)態(tài)溫度場分布情況，成功實現(xiàn)了機床主軸熱變形分析的目標。 關(guān)鍵詞：數(shù)控車床，建模，有限元分析，溫度場， 穩(wěn) 態(tài)分析 2 ABSTRACT Modern machinery develop toward high efficiency, high speed, high quality and high precision, CNC lathe processing industry has bee the development direction, and also bee the key technology of improving international petitiveness. Improving the precision of machining is an important part of quality control. Among them, the thermal deformation of machine tool spindle of machining accuracy is one of the main spindle systems so the machine design, thermal design occupies an important position, domestic and international research in this field has made great progress though, but the theory and the breadth and depth of engineering is not enough. Highspeed movement of the spindle in a lot of heat generated in the process so that the spindle temperature, it is necessary to carry out a large number of spindle thermal deformation of proposed pensation measures to improve the CNC machine tools precision. Its context for the study is as follows: 1. To establish threedimensional CAD model of machine tool spindle, the model can display Spindle structure lively. 2. On the basis of analyzing the internal heat of spindle, establish the temperature field finite element analysis model of spindle. Finite element of the spindle based on a detailed analysis of the temperature, so it lays the foundation of machine tool spindle thermal deformation for the CK1416 CNC Machine. 3. Taking advantage of Powerful ANSYS thermal analysis function, parametric modeling lathe spindle and set parameters, obtained steadystate temperature distribution, successfully achieve the target of the machine tool spindle thermal deformation analysis. Keywords: CNC lathe, modeling, finite element analysis