基于ABAQUS的7055铝合金切削加工的刀具表面微织构设计及优化分析研究 机械设计专业VIP免费

摘要高.强.度.、.低.密.度.、.优.良.的.耐.腐.蚀.性.等.主.要.性.能.使.合.金.在.很.多.领.域.受.到.青.睐.，.广.泛.应.用.于.航.空.、.医.疗.化.学.等.领.域.。.但.由.于.7.0.5.5.铝.合.金.的.难.加.工.性.，.使.切.削.刀.具.在.加.工.过.程.中.磨.损.严.重.，.耐.用.度.低.，.限.制.切.削.加.工.效.率.的.提.高.。.而.摩.擦.学.相.关.的.研.究.发.现.，.具.有.一.定.纹.理.的.非.光.滑.表.面.反.而.具.有.更.好.的.减.磨.作.用.，.合.理.的.微.织.构.形.式.和.参.数.可.以.起.到.良.好.的.减.磨.作.用.。.本.文.在.销.试.样.的.表.面.加.工.沟.槽.型.微.织.构.，.进.行.销.盘.摩.擦.磨.损.试.验.，.研.究.微.织.构.对.7.0.5.5.铝.合.金.摩.擦.性.能.的.影.响.。.利.用.有.限.元.法.对.7.0.5.5.铝.合.金.切.削.过.程.进.行.仿.真.建.模.，.研.究.微.织.构.刀.具.在.7.0.5.5.铝.合.金.切.削.过.程.中.主.切.削.力.的.变.化.规.律.。.本.文.主.要.从.以.下.几.个.方.面.进.行.研.究.:.首.先.，.利.用.激.光.打.标.机.在.销.试.样.表.面.加.工.出.微.织.构.，.通.过.无.微.织.构.与.有.微.织.构.的.销.试.样.与.7.0.5.5.铝.合.金.组.成.的.摩.擦.副.进.行.摩.擦.磨.损.试.验.，.发.现.微.织.构.有.良.好.的.减.磨.效.果.。.选.择.不.同.尺.寸.参.数.微.织.构.的.销.试.样.与.7.0.5.5.铝.合.金.进.行.摩.擦.磨.损.试.验.，.研.究.不.同.微.织.构.参.数.对.减.磨.效.果.的.影.响.。.其.次.，.利.用.有.限.元.软.件.A.B.A.Q.U.S.构.建.硬.质.合.金.切.削.7.0.5.5.铝.合.金.的.二.维.仿.真.模.型.，.并.进.行.合.金.的.切.削.实.验.，.验.证.模.型.的.正.确.性.。.对.有.微.织.构.的.刀.具.切.削.7.0.5.5.铝.合.金.的.过.程.进.行.仿.真.，.并.与.无.微.织.构.的.刀.具.切.削.7.0.5.5.铝.合.金.的.仿.真.进.行.对.比.，.分.析.刀.具.应.力.分.布.情.况.，.切.削.力.的.变.化.规.律.，.以.及.对.等.效.塑.性.应.变.产.生.的.影.响.。.最.后.，.研.究.切.削.力.关.于.微.织.构.尺.寸.参.数.的.变.化.规.律.。.通.过.单.因.素.试.验.确.定.各.变.量.的最优取值范.围，得.出.主.切.削.力.关.于.微.织.构.参.数.的优化模.型设计。关键词：微织构刀具7055铝合金有限元仿真优化设计ABSTRACTHighstrength,lowdensity,excellentcorrosionresistanceandothermajorpropertiesmakealloyspopularinmanyfields,andarewidelyusedinthefieldsofaviation,medicalchemistryandsoon.However,becauseofthedifficultmachinabilityof7055aluminumalloy,thecuttingtoolshaveseriouswearandtearandlowdurabilityintheprocessofmachining,whichlimitstheimprovementofcuttingefficiency.However,tribologicalresearchshowsthatasmoothsurfacewithacertaintexturehasbetterantifrictioneffect.Reasonablemicrotextureformsandparameterscanplayagoodroleinreducingwear.Inthispaper,thegroovedmicrotexturewasprocessedonthesurfaceofthepinspecimen,andthefrictionandweartestofthepinwascarriedouttostudytheeffectofmicrotextureonthefrictionpropertiesof7055aluminumalloy.Thefiniteelementmethodisusedtosimulatethecuttingprocessof7055aluminumalloy,andthechangelawofthemaincuttingforceinthecuttingprocessofthemicro-texturetoolinthe7055aluminumalloyisstudied.Thispapermainlystudiesfromthefollowingaspects:Firstofall,microtextureswereprocessedonthesurfaceofpinspecimensbylasermarkingmachine.Frictionandweartestswerecarriedoutonfrictionalpairsconsistingofpinspecimenswithoutmicrotexturesand7055aluminumalloy.Itwasfoundthatmicrotexturehadgoodeffectofreducingwear.Thefrictionandweartestsofthepinsampleswithdifferentsizesofmicrotextureand7055aluminumalloywereselectedtostudytheeffectofthemicrotextureparametersonthewearreduction.Secondly,thetwo-dimensionalsimulationmodelof7055aluminumalloywasbuiltbyfiniteelementsoftwareABAQUS,andthecuttingexperimentoftheall...