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1、景德镇陶瓷学院毕业设计(论文)有关外文翻译院系:机械电子学院专业:材料成型及电子学院姓名:黎秒新学号:200710340125指导教师:刘文广老师完成时间:2011年05月23日说明1、将与课题有关的专业外文翻译成中文是毕业设计(论文)中的一个不可缺少的环节。此环节是培养学生阅读专业外文和检验学生专业外文阅读能力的一个重要环节。通过此环节进一步提高学生阅读专业外文的能力以及使用外文资料为毕业设计服务,并为今后科研工作打下扎实的基础。2、要求学生查阅与课题相关的外文文献3篇以上作为课题参考文献,并将其中1篇(不少于300
2、0字)的外文翻译成中文。中文的排版按后面格式进行填写。外文内容是否与课题有关由指导教师把关,外文原文附在后面。3、指导教师应将此外文翻译格式文件电子版拷给所指导的学生,统一按照此排版格式进行填写,完成后打印出来。4、请将封面、译文与外文原文装订成册。5、此环节在开题后毕业设计完成前完成。6、指导教师应从查阅的外文文献与课题紧密相关性、翻译的准确性、是否通顺以及格式是否规范等方面去进行评价。指导教师评语:签名:年月日ImprovingPerformanceofProgressiveDiesProgressivediest
3、ampingisacost-effectiveandsafemethodofproducingcomponents.Carefuldesignandconstructionofdieswillensureoptimumperformance.Aprogressivedieperformsaseriesoffundamentalsheetmetaloperationsattwoormorestationsinthedieduringeachpressstroke.Thesesimultaneousoperationspr
4、oduceapartfromastripofmaterialthatmovesthroughthedie.Eachworkingstationperformsoneormoredieoperations,butthestripmustmovefromthefirststationthrougheachsucceedingstationtoproduceacompletepart.Carriers,consistingofoneormorestripsofmaterialleftbetweentheparts,provi
5、demovementofthepartsfromonediestationtothenext.Thesecarrierstripsareseparatedfromthepartsinthelastdiestation.Therearesixelementsthatshouldbeaddressedwhendesigningandbuildingaprogressivedietomaximizeitsperformance:·Interpretingthepartprint,·Startingmaterialintoth
6、edie,·Partliftersandpartfeeding,·Flexiblepartcarriers,·Upperpressurepads,and·Drawnshells.InterpretingthePartPrintThefirststepintheproperdesignofaprogressivedieistocorrectlyanalyzethepartprint.Thetooldesignermustinterprettheprinttodeterminethefunctionofthepartbyl
7、ookingforsuchthingsasthetypeofmaterial,criticalsurfaces,holesizeandlocation,burrlocation,graindirectionrequirements,surfacefinishandotherfactors.Thediedesignermustunderstandthepartwell,particularlyifithasirregularshapesandcontours.However,moderncomputer-drawnpri
8、ntsmakethismoredifficultbecausecomputer-drawnpartdatacanbedownloadeddirectlytothedie-designcomputer.Asaresult,thedesignermaynotbecomethoroughlyfamiliarwithimportantpa