滾動支承雙驅(qū)動直線進給系統(tǒng)動態(tài)特性分析和試驗.pdf

1、聲明本學(xué)位論文是我在導(dǎo)師的指導(dǎo)下取得的研究成果，盡我所知，在本學(xué)位論文中，除了加以標注和致謝的部分外，不包含其他人已經(jīng)發(fā)表或公布過的研究成果，也不包含我為獲得任何教育機構(gòu)的學(xué)位或?qū)W歷而使用過的材料。與我一同工作的同事對本學(xué)位論文做出的貢獻均已在論文中作了明確的說明。研究生簽名：當(dāng)象釜厶，斗年3月酣日學(xué)位論文使用授權(quán)聲明南京理工大學(xué)有權(quán)保存本學(xué)位論文的電子和紙質(zhì)文檔，可以借閱或上網(wǎng)公布本學(xué)位論文的部分或全部內(nèi)容，可以向有關(guān)部門或機構(gòu)送交并

2、授權(quán)其保存、借閱或上網(wǎng)公布本學(xué)位論文的部分或全部內(nèi)容。對于保密論文，按保密的有關(guān)規(guī)定和程序處理。研究生簽名：j主金如葉年弓月叫歸Abs仃act滾動支承雙驅(qū)動直線進給系統(tǒng)動態(tài)特性分析和試驗AbstractWiththedevelopmentrequiringhighspeed，highprecisionandgoodstabilityofCNCmachinetoolsapplicationoffeedsystemsequippedwitI

3、ldoubleballscrewsisgraduallyincreasingduetoitsgoodvibrationresistance，highrigidityandrapidsystemresponsivenessBytakingtypicaldoublescrewdrivelinearfeedsystemasstudyexample，itsdynamiccharacteristicWasstudiedfromtheperspec

4、tiveoftheoreticalmodeling，finiteelementanalysis，optimizationandexperimentalverification，theadvantageofthedynamiccharacteristicWasrevealedandthebestinstallationcombinationofscrewsandguiderailswasproposedTheresearchresults

5、wereappliedtodesignhorizontalmachiningcenter’Slinearfeedsystem，byconductingmodaltestonthemodelmachine，thefeasibilityofthedesignresultsandthevalidityofthefiniteelementanalysiswereverifiedFirstly，bytakingsingle—screw—drive

6、feedsystemanddouble—screwdrivefeedsystemasthestudyobject，twodegreeoffreedomvibrationmodelswereestablished，andfurthercalculatednaturalfrequenciesItprovedthatthefrequencyofdouble—screw—drivefeedsystemwere25％30％higherthanth

7、esingle—screwdrivefeedsystem，eventhoughthediameterofdoubleballscrewsWasl5mmsmallerwhichverifiedthatdoublescrewdrivefeedsystemhadbetterabilityofimprovingrigidityandrestrainingvibrationSecondly，thefiniteelementanalysismode

8、lsofthetwosystemswerealsoestablished，vibrationmodes，naturalfrequenciesandamplitude—frequencycurvewereobtainedbymeansofmodalanalysisandharmonicanalysis，andtheadvantageofdoublescrewdrivefeedsystemwasdemonstratedfromthepers

9、pectiveoffiniteelementanalysisAgain，finiteelementanalysismodelsofsimpledoublescrewdrivefeedsystemwereestablishedConsideringtheinfluenceofballscrews’spanandguiderails’span，modalanalysiswerecarriedout，thebestinstallationco

10、mbinationofscrewsandguiderailsWasproposedbasedontheanalysisresultsandthevibrationmodelsFinally，theanalysisandoptimizationresultswereappliedtodesignhorizontalmachiningcenter’SlinearfeedsystemByconductingmodaltestonthemode

11、lmachineandcomparingtheexperimentalresultandanalysisresult，therelativeerrorsofcorrespondingvibrationfrequencieswerecontrolledwithin8％18％，whichverifiedthefeasibilityofthedesignandthevalidityofthefiniteelementanalysisKeywo