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1、陕西理工学院毕业设计论文BasedonthePLCmachiningcentertoolchangecontrolsystemdesignRanLongjun(ShaanxiInstituteofMechanicalEngineeringCollegeofmechanicalengineeringandautomationprofessionalmachinefromclass082,ShaanxiHanzhoung723003)Teacher:HouHonglingInthemachiningoftheworkpiece,thetoolm
2、agazineoftheCNCmachiningcentertobebasedonprocessingrequirementstoolautomatictoolchanger,toolchangerCNCmachinetoolsingeneralhastwocontrolmethods,thatis,fixedaccesstothetoolchangercontrolandrandomaccesstoolchangercontrol. Fixedaccesstothetoolchangercontrol,thelocationofeacht
3、oolinthetoolmagazineisfixed. Tool(CNCtotheTcode)instructionisbasedonthepocketnumberoftheaccessaddresstocontroltheknifekepttheknifeaction. Ie,wheretheoriginalknives,knifesetnumberafteruse,stillthereturnofthatknifesets. Inthecontroloftherandomtoolchange,butalsothelocationoft
4、heknifeistherandomtoolselection(CNCT-code)instructionhasnothingtodowiththepocketnumberisrandomchangesininstructiononlytooldirectnumber. Thistoolchangethewayinthenewknifeafterremovingthetoolmagazinewithoutrotation,immediatelyrandomlydepositoriginallyusedtool,toolchanger,kep
5、ttheknifeatonce,reducingtoolchangetime.T-functionbasedonthepocketcodingprocessingdiagram. TcodeofnumericalcontrolsystemsendsinstructionstotheFLCPLCafterdecodingtoretrievethedatainthetable,findtheaddressoftheTcodeisspecifiedinanewsword,wherethedatatable,andcomparedwiththecu
6、rrentknife,ifinconsistent,thenthetoolmagazinerotationcontrol Thesignalsenttothecontrolsystemofthetoolmagazine,untilthepositioningnumberlocationtoanewknife,toolmagazinetostoptherotation,andisreadytotoolchange第17页共18页陕西理工学院毕业设计论文TheCNCmachiningcentersmalltoollibraryadoptsPLC
7、control,thecontrolprogramusingastructureddesignideas,thecontrolprogramisdividedinto:recordofthecurrenttool,requesttool,dialrotationdirectionjudgmentandtransfertoolchangetimetotimeandtoolchangeindicator flashingandotherparts,respectively,tocompilethevariouspartoftheprogram,
8、andfinallyintegrationofthemastercontrolprogram,thecontrolprogramofstructuralgood,readable
