数控车床自动回转刀架英文文献以及翻译专业研究Word文档下载推荐.docx
- 文档编号:15360580
- 上传时间:2022-10-29
- 格式:DOCX
- 页数:14
- 大小:917.35KB
数控车床自动回转刀架英文文献以及翻译专业研究Word文档下载推荐.docx
《数控车床自动回转刀架英文文献以及翻译专业研究Word文档下载推荐.docx》由会员分享,可在线阅读,更多相关《数控车床自动回转刀架英文文献以及翻译专业研究Word文档下载推荐.docx(14页珍藏版)》请在冰豆网上搜索。
ofdrillingtools
DaniTost*,AnnaPuig,Lluı´
sPe´
rez-Vidal
SoftwareDepartment,PolytechnicalUniversityofCatalonia,SpainAccepted25April2003
Abstract
ThispaperaddressesthesimulationofdrillingtoolsCNCmachining.Itdescribesanovelapproachforthecomputationoftheboundaryrepresentationofthemachinedtools.MachiningconsistsofasequenceofBooleanoperationsofdifferencebetweenthetoolandthegrindingwheelsthroughtime.TheproposedmethodperformsthedynamicBooleanoperationsoncrosssectionsofthetoolanditreconstructsthe3Dmodelbytilingbetweenthecrosssections.Themethodisbasedonclassicalcomputationalgeometryalgorithmssuchasintersectiontests,hullcomputations,2DBooleanoperationsandsurfacetiling.Thisapproachisefficientanditprovidesusercontrolontheresolutionoftheoperations.AbstractThispaperaddressesthesimulationofdrillingtoolsCNCmachining.Itdescribesanovelapproachforthecomputationoftheboundaryrepresentationofthemachinedtools.MachiningconsistsofasequenceofBooleanoperationsofdifferencebetweenthetoolandthegrindingwheelsthroughtime.TheproposedmethodperformsthedynamicBooleanoperationsoncrosssectionsofthetoolanditreconstructsthe3Dmodelbytilingbetweenthecrosssections.Themethodisbasedonclassicalcomputationalgeometryalgorithmssuchasintersectiontests,hullcomputations,2DBooleanoperationsandsurfacetiling.Thisapproachisefficientanditprovidesusercontrolontheresolutionoftheoperations.
q2003ElsevierLtd.Allrightsreserved.
Keywords:
CNCsimulations;
Boresmachining;
Computationalgeometry;
Booleanoperations;
Surfacetiling
1.Introduction
MostoftheresearchonCNCinCADiscenteredontheautomaticcomputationoftoolpaths[5,13].Givenafinaltooldesign,theoptimaltrajectoriesofthetoolandthegrindingwheelsmustbecomputedyieldingasfinalresulttheCNCcode.Machiningsimulationandverificationhasexactlytheoppositegoal:
tocalculatethetoolstartingfromtheCNCcodeandfromageometricalmodelofthemachine,thewheelsandthetoolbeforemachining.Thissimulationhasthreemainapplications[6].First,itdetectseventualcollisionsbetweenthetooloranyofthegrindingwheelsandtherestofthemachine.Itisimportanttoavoidcollisionsbecauseseriousdamagestothemachinescanfollow.Next,simulationprovidesameansofvisuallyverifyingtheefficiencyofthetrajectories,whichmayresultinfasterandcheaperprocesses.Finally,thesimulationallowsuserstocheckifthesurfaceoftheresultingtooliseffectivelythedesiredone.Intheroutinepracticeofmachining,experiencedoperatorshaveenoughskillstoimaginethetoolfinalshapebyonlyreadingtheCNCcode.
However,theyaregenerallynotabletodosowithnewornon-standarddesigns.Therefore,theuseofasimulationsystemdecreasesconsiderablythetoolproductioncostbecauseitavoidsthetrialanderrorprocessontherealmachinewithcostlymaterialsthatisotherwisenecessary.
ThispaperaddressesaparticulartypeofCNCmachiningsimulation:
thegrindingofboresandcutters.ConventionalCADsystemsdonotprovideameansofrealizingthistypeofsimulationsandspecificapplicationsareneeded.Untilrecently,mostofthesimulationapplicationsdealtonlywiththemachiningof2Dcross-sectionsofthetoolsandtheywererestrictedtothemainflutingoperation[3].Threedimensionalapplicationsareratherrecent[4,23].Theyprovideamachiningsimulationforspecific5-axesmachinesandtheyarenotapplicabletogeneralmovements.Thispaperpresentsanovelapproachforthecomputationoftheexternalshapeofthetoolsthroughasequenceofcoordinatedmovementsofthetoolandthewheelsonmachinesofupto6-axes.Theproposedmethodreducesthe3Dproblemto2DdynamicBooleanoperationsfollowedbyasurfacetiling.The2Dsolutioninvolvesdifferenttechniquesofplanarcomputationalgeometry:
fromintersectionstohullcomputations.
Thepaperisstructuredasfollows.InSection2wereviewpreviousapproachesonmachiningsimulations.Section3describesbrieflythecontourconditionsofthesimulation.Finally,Section4describesthecomputationofBooleanoperationsandtheresultsoftheimplementationareshowninSection5.
2.Previouswork
MachiningcanbeconsideredadynamicBooleanoperationofdifferencebetweenthegrindingwheelandthetool.Itisdynamic,becauseboththetoolandthewheelsmovealongtimethroughrotationsandtranslations.
TheVectorCut[8,10],isprobablythemostreferencednumericalcontrolsimulationmethod.Itisanapproximatesolutionthatrepresentsthefrontierasasetofpointsandnormalvectorsthatwillbecutalongthepathofthegrindingwheel.Thism
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 数控车床 自动 回转 刀架 英文 文献 以及 翻译 专业 研究
![提示](https://static.bdocx.com/images/bang_tan.gif)