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ID:5928337
大小:31.00 KB
页数:6页
时间:2017-12-28
《外文翻译--新工具使新机器设计最优=2000字符》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、NewToolsMaximizeNewMachineDesignsTheprimarytoolingconcernswhenmachiningaluminumare:minimizingthetendencyofaluminumtosticktothetoolcuttingedges;ensuringthereisgoodchipevacuationformthecuttingedge;andensuringthecorestrengthofthetoolsissufficienttowithstandthecuttingforceswithoutbreaking.
2、TechnologicaldevelopmentssuchastheMakinoMAG-Seriesmachineshavemadetoolingvendorsrethinktheanystate-of-the-artmachinetechnology.Itisvitaltoapplytherighttoolingandprogrammingconcepts.Materialscoatingsandgeometryarethethreeelementsintooldesignthatinterrelatetominimizetheseconcerns.Ifthese
3、threeelementsdonotworktogether,successfulhigh-speedmillingisnotpossible.Itisimperativetounderstandallthreeoftheseelementsinordertobesuccessfulinthehigh-speedmachiningofaluminum.MinimizeBuilt-UpEdgeWhenmachiningaluminum,oneofthemajorfailuremodesofcuttingtoolsthematerialbeingmachinedadhe
4、restothetoolcuttingedge.Thisconditionrapidlydegradesthecuttingabilityofthetool.Thebuilt-upedgethatisgeneratedbytheadheringaluminumdullsthetoolsoitcannolongercutthroughthematerial.Toolmaterialselectionandtoolcoatingselectionarethetwoprimarytechniquesusedbytooldesignerstoreduceoccurrence
5、ofthebuilt-upedge.Thesub-microngraincarbidematerialrequiresahighcobaltconcentrationtoachievethefinegrainstructureandthematerial’sstrengthproperties.Cobaltreactswithaluminumatelevatedtemperatures,whichcausesthealuminumtochemicallybondtotheexposedcobaltofthetoolmaterial.Oncethealuminumst
6、artstoadheretothetool,itquicklyformsabuilt-upedgeonthetoolrenderingitineffective.Thesecretistofindtherightbalanceofcobalttoprovideadequatematerialstrength,whileminimizingtheexposedcobaltinthetoolsforaluminumadherenceduringthecuttingprocess.Thisbalanceisachievedusingcoarse-grainedcarbid
7、ethatprovidesatoolofsufficienthardnesssoastonotdullquicklywhenmachiningaluminumwhileminimizingadherence.ToolCoatingsThesecondtooldesignelementthatmustbeconsideredwhentryingtominimizethebuilt-upedgeisthetoolcoating.ToolcoatingchoicesincludeTiN,TiAIN,AITiN,chromenitrides,zirconiumnitri
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