某公司官方培训手册英文版.pptx

MSC.Marc version 2005 Training MACHINING Sheng Ping Wang MSC.Marc DevelopmentFEM Simulation of NC Machining ProcessesObjectivesTo predict the effects of insitu residual stress redistribution due to complex 3D machining of bulk components. To streamline process design so as to minimize part fit-up issues. Bottomline : To reduce manufacturing cycle time thereby achieving productivity improvement and cost savings. FEM Simulation of NC Machining ProcessesApproachPseudo-simulation of machining process through automated material removal using NC cutting files (apt or cl files) as input. AssumptionApriori residual stresses in depth of work-piece influence resulting distortions more than surface residual stresses introduced by cutting process. Companies that have been using ApproachBoeing, UTC (Sikorsky), Embraer, Picheney Product Solver - MSC.Marc 2005GUI - MSC.Marc Mentat 2005Material Removal SimulationMaterial to be removedMaterial to be removedBeam #1Material Removal Simulation Flowchart CAD/CAMSystemFE Model(FEA Input Data)NC/CAD DATA(Cutter Path- apt, cl files)FEA Solver(MSC.Marc)Initial Stress FEA Results(Post-processing)Solution ProcedureNC Data InterfaceInitial Residual Stress InputFE SolutionVisualizationNC / CAD Data CUTTER/ 2.000000, .312000, .688000, .312000, .000000,$ .000000, 4.000000TLAXIS/ .000000, .000000, 1.000000FEDRAT/ 50.0000GOTO / 20.00000, 20.00000, 20.00000 PT 1PPRINT************************************************************PPRINT LOAD 2 DIA FACE MILL WITH .312 CORNER RADIUSPPRINT************************************************************LOADTL/230002,LENGTH,0,OSETNO,1SPINDL/9963,CLWCOOLNT/FLOODRAPIDGOTO / -2.00000, 19.00000, 20.00000 PT 2RAPIDGOTO / -2.00000, 19.00000, 14.00000 PT 3FEDRAT/ 150.0000GOTO / -2.00000, 19.00000, 13.30000 PT 4GOTO / .00000, 19.00000,