釬桿用中空鋼軋制過(guò)程的數(shù)值模擬及實(shí)驗(yàn)研究.pdf

1、燕山大學(xué)碩士學(xué)位論文釬桿用中空鋼軋制過(guò)程的數(shù)值模擬及實(shí)驗(yàn)研究姓名：劉輝申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：機(jī)械設(shè)計(jì)及理論指導(dǎo)教師：于恩林20060201燕山大學(xué)l：學(xué)碩士學(xué)位論文AbstractHollowdrillsteelswhichactasdrillingsteelrodsarenamedrockdrillsteelsforshortBecausetheircrosssectionsarealmostequilateralhexagons，

2、theequilateralhexagonsrockdrillsteelsareregardedasmyresearchobjectsNowadays，thehotpiercingandhotstretchingmethodisthemainmethodofprocessingrockdrillsteelsinOLU“countryIncomparisonwiththehotpiercingandhotstretchingmethod，

3、thehotpiercingandhotrollingmethodismorepromising，becausethemethodismoreefficientandtheirfinishedproducts’life—spanislongerInthepast，researchaboutrockdrillsteelsweremainlyconvergedinstrainandstressinwork、lifespanestimate、

4、hottreatmenttechnicsaswellasthechoiceofmaterialFewpeopleresearchedrockdrillsteelsabouttheprocessofrollingandtheyoftenadoptedexperimentalorqualitativemethodsUntilnowIhaven’tfoundthenewsofhowrollingtechnicsvariablesandthet

5、ubebillets’dimensioninfluencethefinishedproducts’figurequantitivelyTherollingofrockdrillsteelisoneofthemostcomplexdeformationprocesses，whichincludesthenonlinearofmaterial、geometry、boundaryconditionsandseveralfieldscoupli

6、ngModemcomputermodelingtechnologiesallowtoperfoITnmoreaccuratedescriptionofmaterialflowbehaviorofworkpieceinrollingThemajoreffortofthisstudyistosimulatetherockdrillsteelrollingprocessbyusingthreedimensionalelasticplastic

7、FEMwiththeintentiontofindtherelationshipbetweenthetechnicsvariablesofrolling、thedimensionoftubebilletsandtheshapeofthefinishedproductsInthiswork，thehistoricalresearchontherockdrillsteeliSreviewedatfirstThebasictheoryofel

8、asticplasticFEMaswellasdetailedoperationprocedures，isgivenThen，rockdrillsteelsrollingprocesseswithdifferentrollpassvariableandtubebillets’dimensionhavebeensimulatedbyusingthree—dimensionalfiniteelementcode—ABAQUSThedefor