文献翻译--数控加工切削.doc

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1、庠仄卩浇怵勾茸筐阆馘龋藩糊纡琚醺鲛傩葜忪沧搜了杏匡寞翊鄂湟挖Figure9-12Tool-noseradiuscompensationallowsusto渭逋韶轳繁警波始陧贳programthepart,notthetoolpath.Themathematical蠓摆润鹾主偶让嗔浼梅calculationsthatareneededtoprogramapartprofile映疮蝰幌雉荬矮婧毪敫withanglesandradii,withouttheaidofcutter竭罂点七熊啤础男褙旎diametercompensation,canbe

2、veryinvolved.锶绌菝闸擅槎呔蝣肱幻onaturningcenter.WhenwesettheXandZaxesofthetool,wecreateasquarepointonthetool.Mostofthetoolsweuseforturninghaveradii.Tocompensatefortheradii,weneedtouseTNRcompensation,whichsavesusfromhavingtomathematicallycalculatethecutterpath(seeFigure9-12).逖炭椰鹛崾熠息

3、人唐万TNRcompensationalsoletsususethesameprogramforavarietyoftooltypes.WithTNRcompensationcapabilities,theinsertradiussizecanbeignoredandthepartprofilecanbeprogrammed.Theexactsizeofthecuttingtooltobeusedisenteredintotheoffsetfile,andwhentheoffsetiscalled,thetoolpathwillautomat

4、icallybeoffsetbythetoolradius.斋湍硌囚么舾捧粘呢砩Tool-noseradiuscompensationcanbetotherightorleftofthepartprofile.Todeterminewhichoffsetyouneed,imagineyourselfwalkingbehindthecuttingtool.Doyouwantthetooltotheleftoftheprogrammedpathortotheright(seeFigure9-13)?犬税蛆鳕喷搽扭图孟园Figure9-13Tool

5、-nosecompensation.簖裆搦钠痖哂碗辍窝佘CompensationdirectioniscontrolledbyaG-code.Whenacompensationtotheleftisdesired,aG41isused.Whenacompensationtotherightisneeded,aG42isused.Whenusingthesecuttercompensationcodes,youneedtospecifyhowmuchthecontrolleristooffset.Thesizeoftheradiusisplac

6、edinthenoseradiusoffsettable,whichistypicallylocatedadjacenttothetoolfileunderthetoolnumberbeingused.Tool-noseradiusinformationcanbedeterminedfromcatalogsortheinsertpackage.田萧炯瞠鋈摺颞棂钻塑Otherinformationneededtoinsurepropercompensationisthetoolnosedirectionvector.Thetooltiporim

7、aginarytooltipofturningtoolshasaspecificlocationordirectionfromthecenterofthetool-noseradius.Thetoolnosevectortellsthecontrolwhichdirectionitmustcompensateforindividualtypesoftools.Standardtool-nosedirectionvectorsareshowninFigure14.Thedirectionvectornumberisusuallyplacedin

8、thesametooloffsettableastheradiusvalue.唷隽表涧水至冠痦段坌袼折鼗茎疴陡密彦疝捩Figure9-14Tool-noseradi