面向五轴高速加工的高品质刀具路径规划分析

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1、大提高工件曲面的加工精度，改善曲面的粗糙度并提高曲面的光顺性，具有很强的工程实际意义。关键词：对偶四元数，五轴加工，等距双NURBS，刀具路径规划II万方数据Theresearchofhighqualitytool-pathplanningforfive-axishighspeedmachiningABSTRACTFiveaxisNCmachininghasbecomeanimportantmeansofefficientprocessingofcomplexsurfaceparts,itcanimprovethetoolaccessib

2、ilitymainlybychangingthecutteraxisdirection,andavoidtheinterferencebetweenthetoolandworkpiece.AdualNURBS1toolpathfairingmethodmeetingthegivenfittingaccuracyandreachingGcontinuityisproposedforthelineartoolpathinworkcoordinatesystem(WCS).Themaincontentsofthispaperandtheinno

3、vatoryresultsarelistedasfollows:Firstly,Thepaperstudiesthetoolenvelopesurfaceexpressionformedbythetoolinterpolationfromthelinegeometryanddual-quaternion.Onthebasisofthetheoreticalanalysisandprecisioncontrol,thelineartoolpathinWCSisfittedwithdual-quaternionB-splinevectorfu

4、nctioninordertoobtainthedual-NURBStoolpathdescribingthelocusoftooltippointandtoolaxispoint.SimulationsshowthatthelineartoolpathinWCSissmoothedbyusingtheproposedalgorithmtoobtainadualNURBStoolpathfitting1precisionandreachingGcontinuity.Secondly,theisometricdouble-NURBS,whi

5、chonewastheNURBScurveofaxispointsandanotherwastheNURBScurveofcuttercenterpoints,wasgeneratedbydiscretetoolpathdatatodescribethefive-axistoolpath.InordertosolvetheproblemthatthedistancebetweenthetwoNURBScurvesmaynotbeequal,amethodofgaussiansphericaloptimizationofcutteraxis

6、vectorNURBScurvewasproposed.Theisometricdouble-NURBSwasgeneratedbyamethodofoptimizingcutteraxisvectorofNURBScurveonthegaussiansphere,thentheparameterofthedouble-NURBSmaybenotsynchronous.Therefore,aparametersynchronousmodelofisometricdouble-NURBStool-pathwasproposedtosolve

7、thisproblemwhichdouble-NURBScurveparameterwasnotsynchronizationintheprocessoffive-axismachininginterpolation.Simulationresultsshowthattheproposedalgorithmcangeneratedual-NURBStoolpathandtheprecisionof-5synchronousinterpolationmodelachievestheaccuracyof10mmdegreeandmainlyi

8、n-6the10mmdegreetherefore,itissuitableforcomplexsurfaceinfive-axismachining.Thirdly,throughanaly