【正文】 the feed drive system is established by taking the nonlinear friction and the nonconstant stiffness along ball screw axis into consideration based on basic kiic theory. The model is more similar to the real physics model than traditional ones. By analyzing the model with SIMULINK, the influences of mechanical and servo parameters on the dynamic response are derived. (4) By using a dynamometer, dial indicator, loading device and other assistive tools, a II method for measuring the static stiffness of the feed drive system is achieved. By contrasting the static stiffness experimental values of the feed drive system in Y axis of a machine center in different positions with theoretical values, the static stiffness model is proved right. KEY WORDS: Ball Screw, Feed Drive System, Stiffness Matching, Dynamics Modeling III 目錄 摘要 ................................................................................................................................ I ABSTRACT ................................................................................................................. II 第一章 緒論 .................................................................................................................. 1 課題研究背景與意義 ............................................................................... 1 進(jìn)給系統(tǒng)國內(nèi)外研究現(xiàn)狀 ....................................................................... 2 進(jìn)給系統(tǒng)靜剛度建模 ..................................................................... 3 進(jìn)給系統(tǒng)動力學(xué)建模 ..................................................................... 4 進(jìn)給系統(tǒng)控制補(bǔ)償方法 ................................................................. 5 論文的主要工作及內(nèi)容 ........................................................................... 6 第二章 滾珠絲杠進(jìn)給系統(tǒng)傳動靜剛度匹配 ............................................................. 8 滾珠絲杠進(jìn)給系統(tǒng)傳動靜剛度模型 ....................................................... 8 滾動軸承軸向靜剛度建模 ....................................................................... 9 軸承組配形式 ............................................................................... 10 軸承預(yù)緊 ....................................................................................... 10 單個(gè)軸承的剛度 ........................................................................... 11 多聯(lián)軸承的剛度 ........................................................................... 11 絲杠螺母副靜剛度建模 ......................................................................... 14 鋼球滾珠在滾道中的接觸問題 ................................................... 15 絲杠螺母副軸向剛度建模 ........................................................... 18 幾何參數(shù)及預(yù)緊對絲杠螺母副接觸剛度的影響 ....................... 19 滾珠絲杠軸向靜剛度建模 ..................................................................... 20 進(jìn)給系統(tǒng)靜剛度匹配 ............................................................................. 22 支承軸承數(shù)目對進(jìn)給系統(tǒng)傳動靜剛度的影響 ........................... 22 絲杠直徑對進(jìn)給系統(tǒng)傳動靜剛度的影響 ................................... 23 螺母預(yù)緊力對進(jìn)給系統(tǒng)傳動靜剛度的影響 ............................... 24 考慮導(dǎo)軌滑塊接觸剛度切削點(diǎn)靜變形建模 ......................................... 24 滑塊的受力分析 ........................................................................... 25 IV 26 本章小結(jié) ................................................................................................. 29 第三章 基于 SAMCEF 的進(jìn)給系統(tǒng)模態(tài)和諧響應(yīng)分析 ......................................... 30 SAMCEF 有限元軟件簡介 ..................................................................... 30 進(jìn)給系統(tǒng)有限元建模 ............................................................................. 30 進(jìn)給系統(tǒng)主要部件的材料屬性 ............................................................. 32 33 35 進(jìn)給系統(tǒng)諧響應(yīng)分析 ............................................................................. 37 本章小結(jié) ................................................................................................. 38 第四章 滾珠絲杠進(jìn)給系統(tǒng)機(jī)電耦合仿真 ................................................................ 39 伺服進(jìn)給系統(tǒng)動力學(xué)模型的建立 ......................................................... 39 影響進(jìn)給系統(tǒng)特性相關(guān)參數(shù)的計(jì)算 ..................................................... 42 42 44 45 Z 軸進(jìn)給系統(tǒng)中的仿真參數(shù) ........................................................ 46 考慮變剛度和非線性摩擦因素的動力學(xué)分析 ..................................... 46 46 49 50 50 50 本章小結(jié) ................................................................................................. 51 第五章 進(jìn)給系統(tǒng)靜剛度實(shí)驗(yàn) .................................................................................... 53 實(shí)驗(yàn)原理 ................................................................................................. 53 實(shí)驗(yàn)儀器 ................................................................................................. 54 實(shí)驗(yàn)結(jié)果及分析 ..................................................................................... 55 本章小結(jié) ................................................................................................. 56 第六章 結(jié)論與展望 .................................................................................................... 57 結(jié)論 57 工作展望 ................................................................................................. 58 V 參考文獻(xiàn) ..................................................................................................................... 59 發(fā)表論文和科研情況說明 ......................................................................................... 63 致謝 ............................................................................................................................. 64 VI 第