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InternshipSelf-Summary





Thefour-daycomprehensivemetalworkinginternshipattheEngineeringTeachingCenterJune15thtoJune18thwascompletedstrictlyinaccordancewiththerotationscheduleofthecenter,coveringalltrainingmodulesincludingmaterialchemistryexperiments,traditionalhotandcoldprocessing,digitalnumericalcontrolmachining,3Dprinting,aswellasspecialmachiningsuchaslasercuttingandwireelectricaldischargemachiningWEDM.Theintensivepracticaltrainingmodewithalternatingoperationsacrossmultipletradesallowedmetostepoutoftextbooktheoriescompletely,andexperiencetheentiremechanicalmanufacturingprocessfromrawmaterialforming,cuttingmachining,specialmanufacturingtomaterialpropertytesting.Italsoenabledmetogainacomprehensiveandin-depthunderstandingoftherigorandpracticalityoftheengineeringmanufacturingindustry.





OnthefirstdayoftheinternshipwhenIfirstenteredthetrainingworkshop,Iwasunfamiliarwithmostoftheequipmentandprocesses.Inthemorning,group-basedmaterialchemistryexperimentswerecarriedoutsimultaneouslywithrotationaltrainingincasting,laserprocessing,3DprintingandCNClatheoperation.Duringmyfirstattemptatsandcastingmolding,Ifailedtocontroltherammingforceproperlyandhandledthepartingsurfaceroughly,resultinginrepeatedproblemssuchasmoldcollapseduringpatterndrawingandcavitydefects.WhenoperatingtheCNClathe,Iwasnotfamiliarwiththetoolsettinglogicandmessedupthesettingoftoolcompensationparameters,leadingtoseveredimensionalerrorsofpartsduringtrialoperation.Whengrindingmetallographicspecimensformaterialtesting,Iskippedgritgradesofabrasivepaper,leavingdeepscratchesonthespecimensurface,whichmadeitimpossibletodistinguishmetalmicrostructuresunderamicroscope.Ifeltoverwhelmedatfirstwhenconfrontedwithsuccessiveoperationalmistakes.Fortunately,thesupervisinginstructorsbrokedowntheoperatingstandardsstepbystep.Meanwhile,Irecordedkeyoperatingpointsanderror-pronedetailsofeachtradeonthescheduleeveryday,reviewedthecausesofmistakesduringbreaks,andcorrectedmyoperatinghabitsbitbybit.





Astherotationproceeded,Isuccessivelygotinvolvedinwelding,forging,wireelectricaldischargemachiningandothertrades,eachofwhichbroughtnewdifficultiestotackle.Inthemanualarcweldingtraining,Ifrequentlyencounteredimpropercurrentmatchinganderratictravelspeedoftheweldingrod,causingdefectsincludingexcessivespatter,slaginclusionandincompletepenetrationonweldingseams.Duringforgingpractice,Icouldnotaccuratelyjudgetheheatingtemperatureofforgings,andmymovementsfordrawingoutandupsettingwereuncoordinated,sothesizeandshapeofforgingsfailedtomeetdrawingrequirements.Whenconductingwireelectricaldischargemachining,Ihadnoclearunderstandingoftheadjustmentlogicformolybdenumwiretensionanddischargegapcompensation,resultinginobvioustaperandroughsurfaceonthemachinedpartcontours.Attheendofpracticaltrainingeveryafternoon,Isortedoutproblemsbasedonthedailyrotationcontent,tooktheinitiativetoconsultteachersaboutprocessoptimizationsch--


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