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1、Generalall-steelpunchingdie'spunchingaccuracy（普通全钢冲模的冲压精度分析）作者：不详来源于：机械论文文档在线免费下载网发布时间：2009-1-220:04:17Generalall-steelpunchingdie'spunchingaccuracyAccuracyofpanelpunchingpartisdisplaythepressaccuracyofthedieexactly.Buttheaccuracyofanypunchingpartslineardimensionandpo
2、sitionalaccuracyalmostdependontheblankingandblankingaccuracy,・Sothatthecompoundmouldofcompoundpunching'saccuracy,istypicalnessandrepresentationinthemajority.Analyseofthedie'saccuracyFortheanalyseofpracyicableinaccuracyduringproductionofdiestoinactivation,wecouldgetthe
3、tendencywhenitisaugmentationinmosttime・Fromthiswecouldanalysetheelements.Whenthenewpunchdiesptintoproductiontothefirstcuttergrinding,theinaccuracyproducedcalledinitialerror;ifthediegrindingmorethantwentytimes,untilit'sdiscard,theinaccuracycalledconventionalerror;andbe
4、forethediesdiscard,thelargesterrorofthelastbatchpermit,calledlimitingerror,atjobsite,theevidencetoconfirmlifeofsharpeningisthehigheroftheblanking,punchedholeorpunchedparts.Becauseallfinishedpartshadbeenblanked,soitisespeciallyforthecompounddies.Therefore,theanalyseofb
5、urrandmeasurementisespeciallyimportantwhendothemasenterprisestandardizationorcheckedwith«theheightofpunchingpart>>・Theinitialerrorusuallyistheminimalthroughthewholelifeofdie.Itsmagnitudedependontheaccuracyofmanufacture,quality,measureofthepunchingpart,thicknessofpanel
6、,magnitudeofgapanddegreeofhomogeneity.Theaccuracyofmanufacturedependonthemanufactureprocess・Forthe1mmthickedcompoundpunchingpartmadeinmediumsteel,theexperimentalresultandproductivepracticeallprovethattheburrofdieswhichproducedbysparkcuttingarehigher25%〜〜30%thanproduce
7、dbygrinder,NCorCNC.ThereasonisthatnotonlythelatterhavemoreexactmachiningaccuracybutalsothevalueofroughnessRaislessoneorderthantheformmer,itcanbereached0.025屮n・Therefore,thedie'sinitialblankedaccuracydependsontheaccuracyofmanufacture,qualityandsoon.Thenormalerrorofthep
8、unchdieisthepracticableerrorwhenthefistcuttergrindingandthelastcuttergrindingbeforethedieproducethelastqualifiedproduct.Asth
