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ID:50049620
大小:112.00 KB
页数:14页
时间:2020-03-08
《数控技术专业英语 教学课件 作者 黄义俊 电子教案统一模板(数控)Unit7.ppt》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、Unit7Computer-aidedPartProgrammingLesson13DevelopmentofComputer-aidedCNCProgramming7.1Lesson14Computer-aidedPartProgramming7.2ReadingMaterials13ConversationalProgramming7.3ReadingMaterials14Computer-aidedProgrammingLanguages7.47.1Lesson13DevelopmentofComputer-aidedCNCProgr
2、ammingInthepastprogrammingwasperformedmanually.Theprogramwaswritteninwordaddressandwastailoredtorunonaparticularcontroller.[1]Trigonometrywasamustfordeterminingtoolpath.[2]TheCNCmachineneededtobehaltedwhiletheoperatorkeyedtheprogramintothemachinecontrolunit.TheCNCmachinewas
3、furthertiedupforprogramverification,whichinvolvedmachiningatestpartandinspectingtheresults.Thedigitalcomputer,however,haschangedthewayprogramsarewritten,checked,andrun.Someofthemostdramaticimprovementsprovidedbythecomputerincludeoff-lineprogramming,theuseofcomputer-aidedpro
4、gramminglanguages,andtheapplicationofCAD/CAMtoprogramming.CNCmachinesoperateatoptimumwhenrunningpartprogramsandmachiningparts.[3]Thisgoalisachievedwhennewprogramsarewrittenandtestedatanoff-linecomputerterminal.Theprogramcanbecomposeddirectlyinwordaddress(GandMcodes)withthea
5、idoftexteditingsoftware.Itcanbetestedandthenstoredonpunchedtape,diskette,zipdisketteorCD-ROMmedia.IftheremotecomputerhasacommunicationlinetotheCNCmachine,theprogramcanbedownloadeddirectlytothemachine’scontroller.Thistechniqueisknownasoff-lineprogramming.7.2Lesson14Computer-
6、aidedPartProgrammingCAD/CAMstandsforComputer-aidedDesignandComputer-aidedManufacturing.Experiencedprogrammersusethispowerfultooltosimplifythetaskofwritingandtestingpartprograms.CAD/CAMcandramaticallyboosttheproductivityofCNCshops.TheCAD/CAMapproachissuperiortothetechniqueof
7、usingacomputer-aidedprogramminglanguagetopreparepartprograms.SomeoftheadvantagesofusingCAD/CAMare:1.Thesystemcanbeusedforoff-linecheckingoftheprogram.Resultingtoolpathscanbegraphicallydisplayedonthecomputerscreen.Theusercanzoominandviewthetoolpathsatvariousorientations.Thes
8、ystemcangeneraterealtimematerialremovaldisplaysandflagtoolbreakthroughorpartviolat
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