基于點云的數(shù)控刀軌數(shù)據(jù)生成方法的研究.pdf

1、分類號：密級：學(xué)號：2007104單位代碼：10407碩士學(xué)位論文論文題目:基于點云的數(shù)控刀軌基于點云的數(shù)控刀軌數(shù)據(jù)數(shù)據(jù)生成方法生成方法的研究研究研究方向數(shù)控技術(shù)數(shù)控技術(shù)與裝備與裝備專業(yè)名稱機械機械工程工程研究生姓名范敏導(dǎo)師姓名、職稱逄啟壽逄啟壽副教授教授2002009年12月20日江西贛州IIAbstractReverseEngineeringisanimptanttechnologywhichistorealisethedigita

2、lcopyingimprovementofaproductpart.Ithasverybroadapplicationprospects.TheintegrationofRENCmachininghasbecomeanimptanttechnicalmeansofdesignproductinnovation.IngeneralproceduresofREthetoolpathofNCmachiningwasgeneratedfroms

3、urfacemodelwhichwasreconstructedfrommeasuredpointcloudbysurfacefittingoffsettrimming..TheprocessingoffreefmsurfacereconstructionisgreatestdifficultyofRE.Thesemethodswerenotonlyfussybutalsoinaccurateespecially.Accdingtoth

4、isfactwehopetofindawaywhichcanbypassthisdifficulty.ThoughproperlyprocessingtopointclouddatawecangettheNCtoolpathdatadirectly.InthiswayrapidityhighefficiencyofREtechnologycanfullyembody.Onthebaseofdirectprocessing，thissub

5、jecthadachievedaintegritytechnologyroadmapfromthepointclouddatatotheprocessingtoolpathdata.ThefirstpartishowtoconstructivethecrespondingSTLmodelfrompointclouddata.Thenextstepisseveralimptanttechnicalaspects:reconstructio

6、nSTLmodeltopologicalrelationssubdivisionSTLmodelequidistantoffsetsubdivisionsurface.FinallywecangettheNCtoolpathdatathroughpostprocessingfcrosslineswhichisfmedbythecrosssectionalplanetheequidistantsurfaceoftriangularface

7、tsintheSTLfile.Thepointtothispapercanbringunderfivemainheadings:(1)QuisitionpreprocessingofdatapointsgenerationoftheSTLfile(2)GenerationoftheSTLfilebythescatteredpointcloudtotopologyreconstructionanalyseofthedatastructur

8、esfthesurfaceoffsetofthegridnumericalcontrolmachining(3)Toenhancethedataaccuracywehaveresearchedimcomplmentedsurfacesubdivionsionfthetriangularmeshwhichisestablishedbytopologyreconstruction(4)Researchralizationoftheequid