模具外文翻译--普通全钢冲模的冲压精度分析.doc模具外文翻译--普通全钢冲模的冲压精度分析.doc

收藏 分享

资源预览需要最新版本的Flash Player支持。
您尚未安装或版本过低,建议您

本科毕业论文(设计)中英文资料翻译学生姓名所在院系机电学院所学专业机电技术教育完成时间GENERALALLSTEELPUNCHINGDIE’SPUNCHINGACCURACYACCURACYOFPANELPUNCHINGPARTISDISPLAYTHEPRESSACCURACYOFTHEDIEEXACTLYBUTTHEACCURACYOFANYPUNCHINGPARTS’LINEARDIMENSIONANDPOSITIONALACCURACYALMOSTDEPENDONTHEBLANKINGANDBLANKINGACCURACY,SOTHATTHECOMPOUNDMOULDOFCOMPOUNDPUNCHING’SACCURACY,ISTYPICALNESSANDREPRESENTATIONINTHEMAJORITYANALYSEOFTHEDIE’SACCURACYFORTHEANALYSEOFPRACYICABLEINACCURACYDURINGPRODUCTIONOFDIESTOINACTIVATION,WECOULDGETTHETENDENCYWHENITISAUGMENTATIONINMOSTTIMEFROMTHISWECOULDANALYSETHEELEMENTSWHENTHENEWPUNCHDIESPTINTOPRODUCTIONTOTHEFIRSTCUTTERGRINDING,THEINACCURACYPRODUCEDCALLEDINITIALERROR;IFTHEDIEGRINDINGMORETHANTWENTYTIMES,UNTILIT’SDISCARD,THEINACCURACYCALLEDCONVENTIONALERROR;ANDBEFORETHEDIESDISCARD,THELARGESTERROROFTHELASTBATCHPERMIT,CALLEDLIMITINGERRORATJOBSITE,THEEVIDENCETOCONFIRMLIFEOFSHARPENINGISTHEHIGHEROFTHEBLANKING,PUNCHEDHOLEORPUNCHEDPARTSBECAUSEALLFINISHEDPARTSHADBEENBLANKED,SOITISESPECIALLYFORTHECOMPOUNDDIESTHEREFORE,THEANALYSEOFBURRANDMEASUREMENTISESPECIALLYIMPORTANTWHENDOTHEMASENTERPRISESTANDARDIZATIONORCHECKEDWITHTHEHEIGHTOFPUNCHINGPARTTHEINITIALERRORUSUALLYISTHEMINIMALTHROUGHTHEWHOLELIFEOFDIEITSMAGNITUDEDEPENDONTHEACCURACYOFMANUFACTURE,QUALITY,MEASUREOFTHEPUNCHINGPART,THICKNESSOFPANEL,MAGNITUDEOFGAPANDDEGREEOFHOMOGENEITYTHEACCURACYOFMANUFACTUREDEPENDONTHEMANUFACTUREPROCESSFORTHE1MMTHICKEDCOMPOUNDPUNCHINGPARTMADEINMEDIUMSTEEL,THEEXPERIMENTALRESULTANDPRODUCTIVEPRACTICEALLPROVETHATTHEBURROFDIESWHICHPRODUCEDBYSPARKCUTTINGAREHIGHER2530THANPRODUCEDBYGRINDER,NCORCNCTHEREASONISTHATNOTONLYTHELATTERHAVEMOREEXACTMACHININGACCURACYBUTALSOTHEVALUEOFROUGHNESSRAISLESSONEORDERTHANTHEFORMMER,ITCANBEREACHED0025ΜMTHEREFORE,THEDIE’SINITIALBLANKEDACCURACYDEPENDSONTHEACCURACYOFMANUFACTURE,QUALITYANDSOONTHENORMALERROROFTHEPUNCHDIEISTHEPRACTICABLEERRORWHENTHEFISTCUTTERGRINDINGANDTHELASTCUTTERGRINDINGBEFORETHEDIEPRODUCETHELASTQUALIFIEDPRODUCTASTHEINCREASEOFCUTTERGRINDING,CAUSEDTHEMEASURETHENATUREWEAROFTHEDIESAREGRADUALINCREASING,THEERROROFPUNCHINGPARTINCREASEALSO,SOTHEPARTSAREBLEWPROOFANDTHEDIEWILLBEUNUSEDTHEHOLEONTHEPARTANDINNERBECAUSETHEMEASUREOFWEARWILLBESMALLANDSMALLGRADUALLY,ANDITSOUTSIDEFORMWILLBELAGERINTHESAMEREASONTHEREFORE,THEHOLEANDINNERFORMINTHEPARTWILLBEMADEMOULDACCORDINGTOONEWAYPOSITIVEDEVIATIONORNEARLYEQUALTOTHELIMITMAXMEASUREINLIKEMANNER,THEPUNCHINGPART’SAPPEARANCEWILLBEMADEMOULDACCORDINGTOONEWAYNEGATIVEDEVIATIONORNEARLYEQUALTOLIMITMINIMEASUREFORTHISWILLBEBROADENTHENORMALERROR,ANDTHECUTTERGRINDINGTIMESWILLBEINCREASED,THELIFEWILLBELONGTHELIMITERRORINPUNCHINGPARTSARETHEMAXDIMENSIONERRORWHICHPRACTICABLEALLOWEDINTHEPARTSWITHLIMITERRORTHISKINDOFPARTSUSUALLYARETHELASTQUALIFIEDPRODUCTSBEFORETHEDIEDISCARDFORTHEALLCLASSESOFDIES,IFWEANALYSETHEFLUCTUATE,TENDENCYOFINCREASEANDDECREASEANDLAWWHICHAPPEAREDINTHEDIE’SWHOLELIFE,WEWILLFINDTHATTHEMASTEROFTHEERRORARECHANGELESS;THEERRORTHATBECAUSETHEABRADEOFTHECUTTERANDIMPRESSIONWILLBEASTHECUTTERGRINDINGTIMESINCREASEDATTHESAMETIMEANDTHATWILLCAUSETHEERROROVERSIZEGRADUALLY;ANDALSOHAVEANOTHERPARTERRORAREUNCONVENTIONAL,UNFORESEENTHEREFORE,EVERYDIE’SERRORARECOMPOSEDOFFIXEDERROR,SYSTEMERROR,ACCIDENTERRORANDSOONFIXEDERRORATTHEWHOLEPROCESSWHENTHENEWPUNCHINGDIEBETWEENJUSTINPUTPRODUCTIONTODISCARD,THECHANGELESSMASTERERRORTHATINQUALIFIEDPARTARECALLEDFIXEDERRORIT’SMAGNITUDEISTHEDEVIATIONWHENTHEDIEPRODUCTIONQUALIFIEDPRODUCTSBEFORETHEFIRSTCUTTERGRINDINGALSOISTHEINITIALERROR,BUTTHEDIEHAVEINITIALPUNCHINGACCURACYATTHISTIMEBECAUSEOFTHEABRADEOFPARTS,THEDIEAFTERGRINDINGWILLBECHANGETHEDIMENSIONERRORANDTHEINCREMENTOFDEVIATIONWILLOVERSIZEASTHETIMESOFCUTTERGRINDINGSOTHEPUNCHINGACCURACYAFTERCUTTERGRINDINGALSOCALLED“GRINDINGACCURACY”ANDLOWERTANINITIALACCURACYTHEFIXEDERRORDEPENDONTHEELEMENTSFACTORASFOLLOWED1THEMATERIAL,SORTS,STRUCTURE,FORMDIMENSION,ANDTHICKOFPANELTHEMAGNITUDEOFPUNCHINGGAPANDDEGREEOFHOMOGENEITYAREHAVEAIMPORTANTEFFECTFORTHEDIMENSIONACCURACYDIFFERENTPUNCHINGPROCESS,MATERIAL,THICKOFPANEL,HAVECOMPLETELYDIFFERENTGAPANDPUNCHINGACCURACYAGEARH62WHICHMADEINYELLOWBRASSWITHTHESAMEMODENUMBERM034,2MMTHICKANDHADACENTERHOLE,WHENTHEGAPGETC05TSINGLEEDGE,ANDPUNCHEDWITHCOMPOUNDPUNCHINGDIE,ANDTHEDIMENSIONACCURACYREACHEDIT7,THEPARTHAVEAFLATSURFACE,THEVERTICALITYOFTANGENTPLANEREACHED895,ITSROUGHNESSRAMAGNITUDEARE125ΜM,HEIGHTOFBURRARE010MM;ANDTHEPUNCHINGPARTAREPUNCHEDWITHPROGRESSIVEDIE,THEGAPC7TSINGLEEDGE,INITIALACCURACYAREIT11,ANDHAVEANMOREROUGHSURFACE,EVENCANSEETHEGAPWITHEYESINTHEUSUALSITUATION,FLUSHESAMATERIALANDITSTHICKNESSTISTHESELECTIONPUNCHINGGAPMAINBASISONCETHEDESIGNATIONGAPHADDETERMINEDFLUSHESTHEPLANESIZETHEFIXEDERRORMAINBODY;FLUSHESTHESTRUCTURERIGIDITYANDTHETHREEDIMENSIONALSHAPEAFFECTSITSSHAPEPOSITIONPRECISION2PUNCHINGCRAFTANDMOLDERSTRUCTURETYPEUSESTHEDIFFERENTRAMMINGCRAFT,FLUSHESAPRECISIONANDTHEFIXEDERRORDIFFERENCEISREALLYBIGEXCEPTTHATTHEABOVEPIECEGEAREXAMPLESHOWED,THEESSENCEFLUSHESTHECRAFTANDORDINARYPUNCHINGFLUSHESAPRECISIONANDTHEFIXEDERRORDIFFERSOUTSIDEAMAGNITUDE,EVENIFINORDINARYPUNCHINGCENTER,USESTHEDIFFERENTGAPPUNCHING,THEFIXEDERRORDIFFERENCEVERYISALSOBIGFOREXAMPLEMATERIALTHICKT15MMH62BRASSPUNCHING,SELECTSCTHE40TUNILATERALIKINDOFSMALLGAPPUNCHINGCOMPAREDTOSELECTC8TUNILATERALLYIIIKINDOFBIGGAPPUNCHING,WILLFLUSHAFIXEDERRORTOENLARGE4060,THEPRECISIONATLEASTWILLFALLALEVELSIDEINADDITION,WHETHERTHEREISPICKSBUILDSAROWOFTYPESIDE,FLUSHESAERRORTOHAVEFARTOBEBIGGERTHANHASBUILDSAROWOFTYPETOFLUSHSIDENOTBUILDSAROWOFTYPETOFLUSHSIDENOTBUILDSAROWOFTYPETOFLUSHAPRECISIONTOBELOWERTHANTHEIT12LEVELSIDE,BUTMOSTHASBUILDSAROWOFTYPETOFLUSHAPRECISIONINIT11BETWEENIT9LEVEL,MATERIALTHICKT4MMFLUSHES,THESIZEPRECISIONCANLOWERSOMEDIFFERENTDIE’SSTRUCTURETYPE,BECAUSEISSUITABLETHERAMMINGMATERIALTOBETHICKANDTHEMANUFACTUREPRECISIONDIFFERENCE,CAUSESTOFLUSHAFIXEDERRORTOHAVELEAVESCOMPOUNDDIECENTER,MULTILOCATIONSCONTINUOUSTYPECOMPOUNDDIEBECAUSEFLUSHESCONTINUOUSLYTODUPLICATETHELOCALIZATIONTOADDONTHEPATTERNMAKINGERRORTOBEBIGGER,THEREFOREITFLUSHESAFIXEDERRORCOMPOUNDPUNCHINGDIETOWANTCOMPAREDTOTHESINGLELOCATIONBIG12LEVELS3THECRAFTOFPUNCHINGDIE’SMANUFACTURETHEMAINWORKOFPUNCHINGDIENAMELYARERAISED,THECONCAVEMOLDPROCESSINGPROCEDURE,TOOPERATESONTHESPECIFICATIONNOTTOBEHIGH,CANTIMEFORMAMORECOMPLEXCAVITYBUTITSPROCESSINGSURFACEAPPROXIMATELYISTHICK003005MMISTHEHIGHTEMPERATUREABLATIONREMAININGFURCATEDAUSTENITEORGANIZATION,DEGREEOFHARDNESSMAYREACHASHIGHASHRC6770,HASTHEMICROCRACK,EASILYWHENPUNCHINGAPPEARSBROKETHECUTTERORFLAKINGTHEITALIANCORRADACORPORATIONSRELATEDMEMOIRCALLEDTHELINECUTTHEPROCESSINGCONTRUCTIONTOHAVETHEDISADVANTAGEOUSINFLUENCETOTHESUPERFICIALGOLD,INFACTALREADYCHANGEDTHEGOLDCONTRUCTIONWEMUSTUSETHEJINGANGSTONEPOWDERTOGRINDORTHENUMERICALCONTROLCONTINUALPATHCOORDINATESRUBTRUNCATECUTTOLINETOMAKETHEPRECISIONWORKINRECENTYEARSCOUNTRYANDSOONSWITZERLANDANDJAPAN,HASCONDUCTEDTHETHOROUGHRESEARCHTOTHEELECTRICALFINISHINGEQUIPMENTANDABIGGERIMPROVEMENT,MAKESFUNCTIONCOMPLETEHIGHACCURACYNCANDTHECNCLINECUTTER,THEPROCESSINGPRECISIONMAYREACH00050001MM,EVENISSMALLERTHEPROCESSINGSURFACEROUGHNESSRAVALUECANACHIEVE04MUMACCORDINGTOTHERECENTYEARSTOTHEDOMESTIC12PRODUCTIONLINESCUTTERFACTORYINVESTIGATIONANDSTUDY,THEDOMESTICALLYPRODUCEDLINECUTTERPROCESSINGPRECISIONDIFFERENTFACTORYDIFFERENTMODELLINECUTTERMIGHTREACH00080005MM,GENERALLYALLIN001MMORBIGGERSOMEWHAT,WASINDIVIDUALALSOCANACHIEVE0005MM,THEPROCESSINGSURFACEROUGHNESSRAVALUEWASBIGGERTHAN16ΜMHOWEVER,THEELECTRICALFINISHINGABLATIONMETALSURFACETHUSTHECHANGEANDTHEDAMAGEMACHINEDSURFACEMENTALSTRUCTURECHARACTERCANNOTCHANGE,ONLYIFWITH
编号:201311171450166713    类型:共享资源    大小:47.50KB    格式:DOC    上传时间:2013-11-17
  
5
关 键 词:
专业文献 学术论文 精品文档 模具外文
  人人文库网所有资源均是用户自行上传分享,仅供网友学习交流,未经上传用户书面授权,请勿作他用。
关于本文
本文标题:模具外文翻译--普通全钢冲模的冲压精度分析.doc
链接地址:http://www.renrendoc.com/p-96713.html

当前资源信息

4.0
 
(2人评价)
浏览:40次
淘宝运营上传于2013-11-17

官方联系方式

客服手机:17625900360   
2:不支持迅雷下载,请使用浏览器下载   
3:不支持QQ浏览器下载,请用其他浏览器   
4:下载后的文档和图纸-无水印   
5:文档经过压缩,下载后原文更清晰   

精品推荐

相关阅读

人人文库
关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服客服 - 联系我们

网站客服QQ:2846424093    人人文库上传用户QQ群:460291265   

[email protected] 2016-2018  renrendoc.com 网站版权所有   南天在线技术支持

经营许可证编号:苏ICP备12009002号-5