【正文】
有限元分析系統(tǒng)為基礎(chǔ),兼并了 PDA 公司的 PATRAN,又在以沖擊、接觸為特長(zhǎng)的 DYNA3D 的基礎(chǔ)上 組織開發(fā)了 DYTRAN。指出了主軸系統(tǒng)結(jié)合部的動(dòng)力學(xué)建模與參數(shù)辨識(shí)是研究主軸系統(tǒng)動(dòng)力學(xué)特性的關(guān)鍵問題及未來的研究趨勢(shì)。 數(shù)控機(jī)床主軸系統(tǒng)的 力學(xué)特性直接影響著機(jī)床的加工精度、加工效率。提高主軸抗振興必須提高主軸組件的靜剛度,采用較大阻尼比的前軸承,以及在必要時(shí)安裝阻尼器。主軸組件的剛度不足,在切削力及其它力的作用下,主軸 將產(chǎn)生較大的彈性變形,不僅影響工件的加工質(zhì)量,還會(huì)破壞齒輪、軸承的正常工作條件,使其加快磨損,降低精度。由于主軸的回轉(zhuǎn)誤差一般都是一個(gè)空間旋轉(zhuǎn)矢量,它并不是所有的情況下都表示為被加工工件所得到的加工形狀。實(shí)際上,由于主軸組件中各種因素的影響,回轉(zhuǎn)中心線的空間位置每一瞬間都是變化的,這些瞬時(shí)回轉(zhuǎn)中心線的平均空間位置成為理想回轉(zhuǎn)中心線。 本章小結(jié) .................................................................................................................... 24 第 4 章 數(shù)控機(jī)床主軸的有限元分析 .................................................................................. 25 主軸分析存在的問題 ................................................................................................ 25 有限元前處理 ............................................................................................................ 41 ANSYS 分析的后處理 ........................................................................................... 47 本章小結(jié) .................................................................................................................... 54 結(jié)論 .......................................................................................................................................... 55 致謝 .......................................................................................................................................... 56 參考文獻(xiàn) .................................................................................................................................. 57 第 1 章 緒論 課題研究的目的和意義 主軸是機(jī)床的重要組成之一 , 機(jī)床在加工過程中 , 主軸對(duì)于加工精度的 影響很大 ,長(zhǎng)期以來 , 人們對(duì)主軸進(jìn)行了廣泛的研究 , 它的性能對(duì)整機(jī)性能 有 很大的影響。 第 2 章 軸的設(shè)計(jì)計(jì)算 .......................................................................................................... 12 電機(jī)的選擇 ................................................................................................................ 12 傳動(dòng)系統(tǒng)的設(shè)計(jì) .......................................................................... 錯(cuò)誤 !未定義書簽。 數(shù)控機(jī)床 Abstract CNC machine tool spindle static and dynamic stiffness is to decide the processing quality and cutting efficiency the important factor, that is, to a large extent influence the life of the machine, so the main processing design occupies an important position ANSYS is a general strong analysis software, this paper, by using ANSYS finite element analysis software and solidworks 3 d modeling software, bining to spindle dynamic and static simulation and analysis, based on the two kinds of software their a little, first in solidworks software set up 3 d model of the spindle, the 3 d model into parasolid x_t format, will transform the model into ANSYS software of finite element model establishment, through the theoretical calculation to determine cutting load and constraint conditions, set its material parameters, and the grid division, conditions, after the pletion of setting, it is concluded that the main solving static and dynamic analysis results, and the visual graphics, analyzed. CNC machine tool spindle system dynamic characteristics of the machine tool directly affect the machining precision and machining efficiency. In the paper the previous research results on the basis of numerical control machine tool spindle system dynamic analysis method are reviewed research. Introduces the characterization of spindle system dynamics characteristic parameters, basically have static stiffness, dynamic stiffness, limit cutting width, natural frequency and vibration mode and damping characteristics and dynamic response. The existing of spindle system dynamic characteristics analysis method have been summed up and summarized, including the finite element method, the transfer matrix method, the impedance coupling method, experimental method, etc. Points out that the spindle system of farming dynamics modeling and parameter identification is the study of dynamic characteristics of the main shaft system key problems. Finally, this paper briefly discusses on the spindle system dynamics research, the development trend of the future of main shaft system should be accurate modeling, dynamic prehensive optimization and dynamic test and analysis, and further research. Key Words: Spindle system。最后 , 簡(jiǎn)要論述了主軸系統(tǒng)動(dòng)力學(xué)研究的發(fā)展趨勢(shì) , 即未來應(yīng)從主軸系統(tǒng)的精準(zhǔn)建模、動(dòng)力學(xué)綜合優(yōu)化和動(dòng)態(tài)測(cè)試及分析等方面進(jìn)行深入研究。文章在總結(jié)前人研究成果的基礎(chǔ)上 , 對(duì)數(shù)控機(jī)床主軸系統(tǒng)動(dòng) 態(tài) 分析方法進(jìn)行了綜述研究。 分 類 號(hào) 密 級(jí) 寧大學(xué) 畢業(yè)設(shè)計(jì) (論文 ) 數(shù)控機(jī)床主軸的有限元分析 所在學(xué)院 專 業(yè) 班 級(jí) 姓 名 學(xué) 號(hào) 指導(dǎo)老師 年 月 日 誠(chéng) 信 承 諾 我謹(jǐn)在此承諾:本人所寫的畢業(yè) 設(shè)計(jì)( 論文 ) 《 XXXXXXXX》均系本人獨(dú)立完成,沒有抄襲行為,凡涉及其他作者的觀點(diǎn)和材料,均作了注釋,若有不實(shí),后果由本人承擔(dān)。 數(shù)控機(jī)床主軸系統(tǒng)的動(dòng) 態(tài) 特性直接影響著機(jī)床的加工精度、加工效率。指出了主軸系統(tǒng)結(jié)合部的動(dòng)力學(xué)建模與參數(shù)辨識(shí)是研究主軸系統(tǒng)動(dòng) 態(tài) 特性的關(guān)鍵問題。 分析方法 。 CNC machine tool 目錄 摘 要 ...................................................................................................................................... III Abstract..................................................................................................................................... IV 第 1 章 緒論 ............................................................................................................................ 6 有限元在機(jī)床主軸領(lǐng)域的應(yīng)用 ................................................................................. 6 機(jī)床主軸的發(fā)展方向 ................................................................................................. 7 機(jī)床主軸的動(dòng)靜態(tài)分析 ............................................................................................ 10 課題的研究意義 .......................................................................... 錯(cuò)誤 !未定義書簽。 第 3 章 數(shù)控機(jī)床主軸三維設(shè)計(jì) .......................................................................................... 20 主軸系統(tǒng)組成 ............................................................................................................ 20 主軸材料及