资源描述：
《机械外文翻译外文文献英文文献机械设计方法及发展趋势.doc》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、本文摘自:《Machinist》MechanicalDesignandDeve;opmentAbstract:Amachineisacombinationofmechanismsandothercomponentswhichtransforms,transmits.Examplesareengines,turbines,vehicles,hoists,printingpresses,washingmachines,andmoviecameras.Manyoftheprinciplesandmethodsofdesignthatapplytom
2、achinesalsoapplytomanufacturedarticlesthatarenottruemachines.ThetermHmechanicaldesign11isusedinabroadersensethan"machinedesign"toincludetheirdesign,themotionandstructuralaspectsandtheprovisionsforretentionandenclosureareconsiderationsinmechanicaldesign.Applicationsoccurinth
3、efieldofmechanicalengineering,andinotherengineeringfieldsaswell,allofwhichrequiremechanicaldevices,suchasswitches,cams,valves,vessels,andmixers.Keywords:MechanicalDesignmechanismsDesignProcessTheDesignProcessDesigningstartswithaneedreal.Existingapparatusmayneedimprovementsi
4、ndurability,efficiency,weight,speed,orcost.Newapparatusmaybeneededtoperformafunctionpreviouslydonebymen,suchascomputation,assembly,orservicing・WiththeobjectivewhollyorpartlyInthedesignpreliminarystage,shouldallowtodesignthepersonnelfullytodisplaythecreativity,noteachkindofr
5、estraint.Evenifhashadmanyimpracticalideas,alsocaninthedesignearlytime,namelyinfrontoftheplanblueprintiscorrected・Onlythen,onlythendoesnotsendtostopsuptheinnovationthementality.Usually,mustproposeseveralsetsofdesignproposals,thenperformthecomparison.Hasthepossibilityverymuch
6、intheplanwhichfinallydesignated,hasusedcertainnotinplansomeideaswhichaccepts.Whenthegeneralshapeandafewdimensionsoftheseveralcomponentsbecomeapparent,analysiscanbegininearnest.Theanalysiswillhaveasitsobjectivesatisfactoryorsuperiorperformance,plussafetyanddurabilitywithmini
7、mumweight,andacompetitivecost.Optimumproportionsanddimensionswillbesoughtforeachcriticallyloadedsection,togetherwithabalancebetweenthestrengthsoftheseveralcomponents-Materialsandtheirtreatmentwillbechosen.Theseimportantobjectivescanbeattainedonlybyanalysisbasedupontheprinci
8、plesofmechanics,suchasthoseofstaticforreactionforcesandfortheoptimumutilizationoff
