基于球杆仪的高速五轴数控机床综合误差建模与检测方法

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1、天津人学博十学位论文基于球杆仪的高速五轴数控机床综合误差建模与检测方法TheDBB-BasedErrorsModelingandMeasurem．entMethodfor5-axisHighSpeedCNCMachineTools一级学科：机械工程学科专业：机械制造及其自动化研究生：商鹏导师：张大卫教授天津大学机械工程学院二OO八年五月天津大学博士学位论文ABSTRACTTllispaperaimedatthemeasurmentofthemainerrorsofthe5-axishighspeedmachinetools，andfousedonthekeyproblemsconc

2、emdforthemeasurementmethodsoftheerrorsofrotaryaxis，thethermalerrorsofhighspeedspindleandlinearmotorsystems．Thispaperbasedondouble—ball·bar(DBB)theoryandfoundthemathematicmodelincludingmaingeometricalerrorsandthermalerrorsofthe5-axismachinetools；andthermal—structurecouplinganalysisforhighspindl

3、eandlinearmotorsystemswasdone．FiveDBBmeasurementmodelsweredesignedfordifferenterrors．Lastly,theexperimentsofDBBfor5-axismachinetoolsweredone．Thefollowingin-depthworkhadbeencompleted．Thesynthesiserrormodelofhighspeed5-axismachinetoolswasfoundedbasedonhomogeneouscoordinatetransformationtheory,in

4、cluded4geometricalerrorsofC-aixs，thermaldrifterrorsofhighspeedspindleandgeometricalandthermalerrorsoflinearmotorsystems，thentheDBBmeasurementmethodwasfoundedaccordingtotheerrormodel．TheFEAanalysisforwholemachinetools．highspeedspindleandlinearguidewasdonebyANSYS，thetemperaturefieldofmachinetool

5、s，thethermaldistortionofspindleandlinearguideweregot，byapplyingthermalandstructuralloadsontheFEAmodels．ThemeasurementmodelsofDBBwasfoundedanddifferenttrajectoriesofDBBfordifferenterrorsweresimulated，including4geometricalerrorsofC-aixs，thermaldrifterrorsofhi【ghspeedspindleandgeometricalandtherm

6、alerrorsoflinearmotorsystems．111emethodforseparatingthegeometricalandthermalerrorsfromDBBdatawasproposedbasedontheclosedcharacteristicofthekinematicalchainof5-axismachinetools，thelocationerrorsofDBBcouldalsobeseparatedbyusingleastsquaremethod．Atlast，thevariationcul'vesofspindlethermaldriftinge

7、rrorsandthermalerrrorsoflinearguideweredrawn,andthedistributionontheworktablesurfaceofsynthesiserrorswerealsodrawn,thentheaccuracyofthemachinetoolswasevaluatedbasedJl天津大学博士学位论文Onalltheanalysismentionedabove．Theoutcomeofthisresearchhadhi