超大型数控船用卷板机上辊挠度分析与补偿技术分析

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1、硕士论文AbstractWiththerapiddevelopmentofChina'sshipbuildingindustry,largemarinebendingmachineisoneoftheimportantdirectionsofthedevelopmentofbendingmachine．Largespanupperrollerdeflectioncompensationisoneofthekeytechnicalproblemsinthedevelopmentoflargemarinebendingmachine．Theupperro

2、llerplaysavitalroleinbendingprocess，butitsdeformmionresultsinunevenpressuredistributioninbendingprocess，andreducestheaccuracyofsheetmetal．Thispaperstudiesonacertain21mlargemarinebendingmachine．Withtheoreticalanalysisandfiniteelementmethod，deflectioncharacterofupperrollerisachie

3、ved．Active-compensationtoimprovedeflectionofupperrollerisbringingforward，anditscompensationeffectissimulated．Firstly,themechanicalparametersofthebendingprocessoflargemarinebendingmachineareobtained．Thesimulativeresultsandthetheoreticalcalculationarecompared，andthenormalcontactp

4、ressurebetweentheupperrollerandsheetmetalinthebendingprocessisobtained．Secondly,thedeflectionoftheupperrollercausedbydeadweightandworkingloadisinvestigated，bytakingthetheoreticalnumericaloptimizationandFEAoptimizationbasedonANSYS，theamount，locationsandtheimposedloadsofbearingro

5、llersareoptimizedreasonably,whichprovideaschemeandtheoreticalbasisforreducingthedeflectionofuppermileranddeflectioncompensation．Thirdly,themethodofmulti-pointsupportontheupperrolleristakenforpre-compensation．Therearemanygroupsofbearingrollersandtheirdistributionisaccordingtothe

6、optimizedresults．Theresultsofpre—compensationareobtainedthroughfiniteelementanalysismethodology．Inordertomeettherequirementsofsheetmetal，beforebendingaccordingtothesimulationresults，．thebearingrollers’highdegreearepre—compensatedthroughelectro-hydraulicpushrods．Finally，throughs

7、ensorsreal-timedetectdeflectioncompensationerror．Toachievemulti-point,independent，automaticallyandquicklycompensateandimprovetheaccuracyofthesheetmetalandtherollingefficiency，computer-controlledservomotorsandelectro—hydraulicpushrodsadjustobliqueirons．Theresultsindicatethestudy

8、Canimprovethequalityofbending，whichCandirectimprovedde