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1、外文文獻(xiàn)資料Generalallsteelpunchingdie’spunchingaccuracyGeneralallsteelpunchingdie’spunchingaccuracyAccuracyofpanelpunchingpartisdisplaythepressaccuracyofthedieexactly.Buttheaccuracyofanypunchingparts’lineardimensionpositional

2、accuracyalmostdependontheblankingblankingaccuracy.Sothatthecompoundmouldofcompoundpunching’saccuracyistypicalnessrepresentationinthemajity.Analyseofthedie’saccuracyFtheanalyseofpracyicableinaccuracyduringproductionofdies

3、toinactivationwecouldgetthetendencywhenitisaugmentationinmosttime.Fromthiswecouldanalysetheelements.Whenthenewpunchdiesptintoproductiontothefirstcuttergrindingtheinaccuracyproducedcalledinitialerrifthediegrindingmethantw

4、entytimesuntilit’sdiscardtheinaccuracycalledconventionalerrbefethediesdiscardthelargesterrofthelastbatchpermitcalledlimitingerr.atjobsitetheevidencetoconfirmlifeofsharpeningisthehigheroftheblankingpunchedholepunchedparts

5、.Becauseallfinishedpartshadbeenblankedsoitisespeciallyfthecompounddies.Therefetheanalyseofburrmeasurementisespeciallyimptantwhendothemasenterprisestardizationcheckedwith.Theinitialerrusuallyistheminimalthroughthewholelif

6、eofdie.Itsmagnitudedependontheaccuracyofmanufacturequalitymeasureofthepunchingpartthicknessofpanelmagnitudeofgapdegreeofhomogeneity.Theaccuracyofmanufacturedependonthemanufactureprocess.Fthe1mmthickedcompoundpunchingpart

7、madeinmediumsteeltheexperimentalresultproductivepracticeallprovethattheburrofdieswhichproducedbysparkcuttingarehigher25%~~30%thanproducedbygrinderNCCNC.Thereasonisthatnotonlythelatterhavemeexactmachiningaccuracybutalsoth

8、evalueofroughnessRaislessonederthanthefmmeritcanbereached0.025μm.Therefethedie’sinitialblankedaccuracydependsontheaccuracyofmanufacturequalitysoon.Thenmalerrofthepunchdieisthepracticableerrwhenthefistcuttergrindingthelas

9、tcuttergrindingbefethedieproducethelastqualifiedproduct.Astheincreaseofcuttergrindingcausedthemeasurethenaturewearofthediesaregradualincreasingtheerrofpunchingpartincreasealsosothepartsareblewproof.thediewillbeunused.The

10、holeonthepartinnerbecausethemeasureofwearwillbesmallsmallgraduallyitsoutsidefmwillbelagerinthesamereason.Therefetheholeinnerfminthepartwillbemademouldaccdingtoonewaypositivedeviationnearlyequaltothelimitmaxmeasure.Inlike

11、mannerthepunchingpart’sappearancewillbemademouldaccdingtoonewaynegativedeviationnearlyequaltolimitminimeasure.Fthiswillbebroadenthenmalerrthecuttergrindingtimeswillbeincreasedthelifewillbelong.Thelimiterrinpunchingpartsa

12、rethemaxdimensionerrwhichpracticableallowedinthepartswithlimiterr.Thiskindofpartsusuallyarethelastqualifiedproductsbefethediediscard.Ftheallclassesofdiesifweanalysethefluctuatetendencyofincreasedecreaselawwhichappearedin

13、thedie’swholelifewewillfindthatthemasteroftheerrarechangelesstheerrthatbecausetheabradeofthecutterimpressionwillbeasthecuttergrindingtimesincreasedatthesametime.thatwillcausetheerroversizegraduallyalsohaveanotheroperates

14、onthespecificationnottobehighcantimefmamecomplexcavity.Butitsprocessingsurfaceapproximatelyisthick0.03~0.05mmisthehightemperatureablationremainingfurcatedausteniteganizationdegreeofhardnessmayreachashighasHRC67~70hasthem

15、icrocrackeasilywhenpunchingappearsbrokethecutterflaking.TheItalianCradaCpationsrelatedmemoircalled“thelinecuttheprocessingcontructiontohavethedisadvantageousinfluencetothesuperficialgoldinfactalreadychangedthegoldcontruc

16、tion.WemustusetheJingangstonepowdertogrindthenumericalcontrolcontinualpathcodinatesrub(cuttoline)tomaketheprecisionwk“.InrecentyearscountrysoonSwitzerlJapanhasconductedthethoughresearchtotheelectricalfinishingequipmentab

17、iggerimprovementmakesfunctioncompletehighaccuracyNCtheCNClinecuttertheprocessingprecisionmayreach0.005~0.001mmevenissmaller.TheprocessingsurfaceroughnessRavaluecanachieve0.4mum.Accdingtotherecentyearstothedomestic12produ

18、ctionlinescutterfactyinvestigationstudythedomesticallyproducedlinecutterprocessingprecisiondifferentfactydifferentmodellinecuttermightreach0.008~0.005mmgenerallyallin0.01mmbiggersomewhatwasindividualalsocanachieve0.005mm

19、theprocessingsurfaceroughnessRavaluewasbiggerthan1.6μm.Howevertheelectricalfinishingablationmetalsurfacethusthechangethedamagemachinedsurfacementalstructureactercannotchangeonlyifwithrubssotherwaysremovesthisharmfullevel

20、.TherefemerelyuseselectricitymachiningincludingthesparkcuttingtheelectricityperfationachieveswithdifficultypunchingespeciallyhighaccuracyhighlifepunchingdietosizeprecisionwkcomponentssurfaceroughnessRavaluerequest.Withpr

21、eciselyrubssthelawmanufacturepunchingdiespeciallymakesthehighaccuracythehighlifepunchingdiesuchas:Thinmaterialsmallgapcompoundpunchingdiemultilocationscontinuoustypecompounddiesoonhasthesizeprecisionhighthewkcomponentsma

22、chinedsurfaceroughnessRavalueissmallthemoldlifehigheracteristic.Itsprocessingcraftatpresentchangedtheelectricalfirebythepastdinaryenginebedroughmachiningsparkcuttingtheelectricitypuncherroughmachiningfinallypreciselyrubs

23、salsofromtakesshaperubsopticscurverubsthemanualgridreferencerubsgraduallyfiltersthecontinualpathgridreferencetorubNCtheCNCcontinualpathgridreferencerubsProcessingcoarsenessmayreach0.001~0.0005mmtheprocessingsurfaceroughn

24、essRavaluemayreach0.1~0.025mum.Therefewiththiscraftmanufacturethedieregardlessofthesizeprecisionthewkcomponentssurfaceroughnessallcansatisfydieeachkindofcompoundrequestthedieisespeciallyhigherthantheelectricalfinishingcr

25、aftmanufacturescale.(4)gapsizedegreeofhomogeneitytheflangeothersheetfmingsgenerallyallmustfirstpunching(fallmaterial)theplatetolaunchthesemifinishedmaterialsafteralsohasthefmingtofallthematerialtheincisionobtainsthesingl

26、eendproducttoflush.Therefepunchingthewkincludingiscommonlyusedpunchingholethemargincutsidesoonregardingeachkindofsheetpressingpartallisnecessary.Therefepunchingthegaptoflushesaoutfminchprecisiontohavethedecisiveinfluence

27、.punchingthegapsmallisevenmaycausepunchingthesizegainhighaccuracy.Regardingdrawabilityiscurvingsoonmouldthegapgreatlywilldecideincreasesflushesthealareasizeerrthesnappingback.Thegapnonunifmitycancausetoflushaburrenlarges

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