混凝土搅拌运输车搅拌筒CAD_CAM技术研究

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1、中南大学硕士学位论文混凝土搅拌运输车搅拌筒CAD/CAM技术研究姓名：唐志林申请学位级别：硕士专业：交通运输工程指导教师：杨岳;李飞前20070501ABSTRACTConcretemixerisanimportanttooltotransporthigh-qualitycommercialconcreteonalargescalewhichplaysanimportantroleinthemodemarchitectureconstruction．W'hileagitatortankisanimporta

2、ntcomponentofconcreteInixers，anditsdesignqualityinfluencesthequalityofcommercialconcretedirectly．Asthestructuresofagitatortankandhelicalvanearecomplex，itconsumesalargeamountofmanpowerandmaterialresourcesusingtraditionaldesignandmanufacturemethod．Byresearch

3、ingCAD／CAMtechnologyofagitatortank,three-dimensionalparametricdesignandNCprogrammingtoagitatortankanditshelicalvanecanbeimplemented，whichwillimprovethedesignqualityandproductionefficiencygreatly．Obliqueconeheliealsurfaceismainlyusedinhelicalvane，whichbelon

4、gstothree-dimensionalsurface．andthere’sstrictmathematicalmodeltocontrolitsbladeprofiles．Basedonmodifiedloghelix,ahypotheticalcalculatedconeisintroduted，andmathematicexpressesofthehelixvanearebuiltonthreefunctionsectiOIlSofmixervane：fromcone，middlecolumn,an

5、dbackcone．BasedontheanalysistotheparametricdesigntechnologyofSolidworks．COMcomponenttechnologyisadoptedtodevelopaparametricdesigncomponentforagitatortank．ThoughthesurfacemodelinginterfacefunctionsappliedbySolidWorksAPI．111ecomponentautomaticallydrawsthepar

6、ametric3Dsurfacemodelofthemixervane．UsingfixedstepSimpsonlaw,themathematicalmodelofeffectiveloadingcapacityandbarycenterofmixingdrumisobtained,andthedevelopedsoRwareCandocalculationstoeffectiveloadingcapacityandbarycenterofagitatortank．Inallusiontothediffi

7、cultythathelicalvallecannotbeshapedoneshot，usingtrianglespreadingmethod，accordingtothemathematicalⅡmodelofvane，thehelicalvaneisoutspreadandaCOMcomponentiSdevelopedtorealizetheoutspreadofhelicalvaneautomatically．Basedontheanalysisofthegeneralmethodsandproce

8、ssesofNC，thedevelopedsoRwaremodulecangeneratetheNCcodeofhelicalvane．Consequently,computerautomationfromdesigntomanufacturetoconcretemixervaneisachieved．耽estudyfinishedinthepaperCansupplyeffectivesupportstothe