简介：Machinetoolhasbeenwidelyusedintheproductionofthemilitaryandcivilian.Themachiningprecisionoftheworkpieceisthedirectreflectionforthemachiningperformanceofmachinetool.Withtheimprovementforrequirementofthemachiningprecision,improvingtheaccuracyofmachiningisbecomingimportant.Guidewayandspindlearethekeymotioncomponentsthatdecidedtheshape,therelativepositionandthesurfaceroughnessoftheworkpiece.Inordertoadapttotherequirementsoftheworkpiecemachining,thispaperanalyzestheerrorsofguidewayandspindlethataffecttheaccuracyoftheprocessing,establishesthemotionrelationsforeveryerrorsofguidewayinmachiningprocess,identifiestheregularforthestraightness,bendingoftheguidewayandrotatingerrorofspindlethatinfluencestheworkpiecesurface.Finally,accordingtothecorrelationanalysisofthemeasuredandthesimulationresults,themotionerrorofmachinetoolisidentified,whichlaysthefoundationforimprovingtheaccuracyofmachinetoolinnextstep.

简介：Usingaspecialconstantdeflectiondevice,thechangesindislocationconfigurationaheadofaloadedcracktipfor60Fe40Nialloy,beforeandaftermagnetizationinamagneticfield,havebeenstudiedinTEM.Theresultsshowedthatthemagnetizationfor60Fe40Nialloycouldenhancedislocationemission,multiplicationandmotion.Also,themechanicalpropertiesof60Fe40Nialloy,inairandinthemagneticfieldrespectively,havebeeninvestigatedusingtheslowstrainratetension.Andtheresultsindicatedthatmagnetizationcouldmaketheyieldstrengthcorrespondingtodecreaseby26percent,butdidnotinfluencetheultimatetensilestrengthandthefracturestrain,whichshowedthatmagnetizationcouldenhanceplasticdeformation.