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1、AbstractThemachincalexpandingisthekeylinkinthehighqualityheavy-caliberstraightseamsubmerged-arcweldingtubeproduction,themechanicalexpandingmilldesignandthemanufacturecraftarecomplex,atthesametimetheWesterncountrysenforcethetechnicalstrictblockadetoourcountry,atpresent
2、ourcountrystillcan’tgraspsthetechniqueofmanufactureofthelarge-scalemechanicalexpandingmill,forthisviewItakethoroughresearchoftheexpandingmilldesigntechniqueofmanufacture,itwillhasapracticalsignificancetothehighqualityheavy-caliberpipelinesteelpipeproductionforourcount
3、ry.Thisarticlefirstcalculatesthestrengthandtravelingscheduleofthemodelφ5084×mmstraightseamweldedpipecompletely,whichellipticityis5%,thematerialisX70,3%expandingrateofthediameter,fromtheoretically,andweredividedthetravelingscheduleintofourstagetodistributecomputation,w
4、hichareexpandingspatialtravelingschedule、expandingentireroundtravelingschedule、expandingdistortiontravelingschedule、thecompensationexpandingsnappingbacktravelingschedule，thus,determinedthedesignvariableoftheexpandingpowerpart(pistoncylinder);Takethevaluesimulationasth
5、emethod,andusethemonodromycyclicmethodtodeterminethevaluabledesignvariablescopeoftheexpandingexecutivecomponentmold(theheadoftheexpanding),taketheresidualstressandtheellipticityofexpandsthediametertheunfinishedpipingasthegoal,useingtheorthogonalexperimentmethodtoanaly
6、sisandobtainthemoldparameteroptimumcompositionextremely.Thisarticledesigntheassemblydrawingandthedetaildrawingoftheexperimentalequipment,completedthedesignofthehydraulicsystemwhichishighandlowpressuredoublepumpfeeded,fivespeedchange,the萬方數(shù)據high-pressuredoverflowtokeep
7、press,completedthedesignoftheelectricitycontrolsystem.Usingthefiniteelementsoftware《I-DEAS》,《MARC》totwokindofexperimentalinstallationswhichdesignedcarryonanalysingtomodellingandvaluesimulation,andstudydistortionandtheequivalentstressstraindistributionconditionofthevar
8、iouskeycomponents,andcarryontheplancontrast.Theresultindicatedthat,usingtheTchute6°conethedesignproposaltobeamoresuperior.Th
