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1、Continuousextrusionstressstrain02Deformationarea01Basicassumptions02Stress-strainequation03ContinuousextrusionstressstrainContinuousextrusiondeformationprocessanddeformationareadivisionThesqueezewheelisdriveninpowerAndisrotatedinthedirectionoftheillustration,and
2、hasanannularshapeonthecircumferenceofthepressingwheelTheworkingarcoftheinnersurfaceofthecavityengagestheoutersurfaceofthesqueezewheelAndtheblockbumpsonthemoldcavitycoincidewiththegroovesofthesqueezewheelSealingtape.Therodblankispressedagainstthegrooveofthesqueez
3、ewheelbythebinderwheelUndertheactionofthefrictionforceiscontinuouslyfedbythesqueezewheelgrooveandthemoldinsidethetableSurfaceoftheextrusionchamber,theblankinfrontofthecavityblockalongthecircularmotionbyResistance,producetherequiredtemperatureandpressureandentert
4、hemoldcavity,andthenthroughtheequipmentMoldinmoldcavityisextrudedintoproduct.1)TheblankisaroundbarthatconformstotheMiseyieldcriterion2)Becausethearclengthandtheareaoftheextrusioncavityarerelativelylarge,itisconsideredthatthemetalinthetrenchisaone-dimensionalstea
5、dyflowproblemalongthearcdirection(θ),thatis,ateachmoment,Thestressdistributionofeachsectionintheaxialdirection(z)oftheextrusionwheelisthesame,andinthegroove,(R)stressstateunchanged.3)inthedeformationzoneⅡ,Ⅲ,ⅥandⅤ,themetalintheR,θbothproducecompressiondeformation
6、anddeformationofthesame,accordingtothemetalflowlaw,thereareσr=σφ.BasicassumptionsDeformationarea1)initialbiteandzone(areaI)2)Upsettingdeformationzone(areaⅡ)3)Sealeddrivezone(areaⅢ)4)sheardeformationzone(areaⅣ)5)Sealingarea(areaⅤ)Stress-strainequationLoremipsumdo
7、lorsitamet,consecteturadipisicingelit,seddoeiusmodtemporincididuntutlaboreetdoloremagnaaliqua.Utenimadminimveniam,quisnostrudexercitationullamcolaborisnisiutaliquipexeacommodoconsequat.Stress-strainequationStress-strainequationStress-strainequationresults(1)Thep
8、rocessofcontinuousextrusionofmetaldeformationisdescribedbypartitiondicingmethod.(2)Onthisbasis,theanalyticexpressionofcontactcompressivestressandshearstressisobtained
