资源描述：
《难变形材料电磁脉冲成型技术》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、1APPENDIXDPublishedin:ASMHandbook,Volume14B,Metalworking:SheetForming,Published2006,ASMInternational,pp.405-418.HighVelocityMetalFormingGlennS.DaehnDepartmentofMaterialsScienceandEngineeringTheOhioStateUniversityI.IntroductionB.HistoricalNotesA.OverviewofmethodsHighvelocityformingmethods
2、werediscoveredintheFromthestart,metalformingusedhammerstoshapelate1800’sandsawsomeapplicationinformingthickbilletsintousefulshapes.Duringtheindustrialplatesinthe1930’s.Betweenabout1950andtheearlyrevolutionfixedtools,suchasstampingdies,where1970’stheU.S.governmentfundednumerousstudiesonfo
3、rcesanddisplacementsareremotelycontrolled,havethedevelopmentandapplicationofhighvelocitybecomethestandardformetalforming.Whilefixedforming.TheU.S.DefenseAdvancedProjectsAgencytoolsarehighlyproductivetheydonotofferthelocal(DARPA)investedheavilyinexplosiveformingcontrolthatwasprovidedbyham
4、merforming.Eventechnologyinthemid1960’s.DARPA[1]citestoday,difficultcomponentsinprototypeproductionandexplosiveformingas“acost-effectiveprocessforaerospacemanufacturearecommonlyproducedwiththeformingavarietyofmetalsandalloysthatresultsinaidofmanuallyoperatedhammers.Highvelocitymetalremar
5、kablyhighreproducibility(~0.5%)forcomplex,formingtechniquesaremoreakintohammersthanlargemetalstructures.UsedextensivelyinDoDprojects,pressworkastheimpulseiscontrolledratherthanforcestheapplicationsincludemakingafterburnerringsfortheordisplacements.Alsolikehammerwork,whenSR-71,jetenginedi
6、ffusers,Titan‘manhole’covers,properlyimplemented,onecancontrolthespatialrocketengineseals,P-3Orionaircraftskin,tacticaldistributionoftheimpulse.missiledomes,jetenginesoundsuppressors,andheatshieldsforturbineengines.”AlsointhesameperiodHighvelocityformingmethodsincludetechniquessuchsignif
7、icantresearchinvestmentsweremadeinthealliedasexplosiveformingandelectromagneticforming.technologiesofelectromagneticformingandThesetechniquesaredistinctfrommostothermetalelectrohydraulicforming.Thesemethodsareexplainedformingmethodsinthattheexplosiveorlater,andarebasedons
