Presentation on theme: "Manufacturing Laboratories, Inc."— Presentation transcript:
1 Manufacturing Laboratories, Inc. *07/16/96Mikron Smart Machine DiscussionMLIManufacturing Laboratories, Inc.*
2 MLI’s Activities (Past and Current) Operating full-time since 1989 as a provider of high-performance machine technology specializing in machining vibrations.Previously designed and built special one-of-a-kind machine tools and accessories.Currently member of:NCMS (National Center for Manufacturing Systems), Ann Arbor, MiNCDMM (National Center for Machining and Mfg.), Latrobe, PAAMRC (Advance Mfg. Research Center) Sheffield, U.K.Provides consulting on both machining and machine/spindle design.Develops/facilitates strategies and techniques for High Performance machining.Markets dynamic analysis and optimization products for the shop floor since 1996.Manufacturing Laboratories, Inc.
3 Manufacturing Laboratories, Inc. What’s MLI GoalsIn the field of high-performance machining create acceptance of the affect of dynamics (frequency behavior) in the cutting process.Provide equipment that measures dynamic influences on the machining process and allows customer to control and manipulate dynamic affects.Provide “on-machine” process monitoring and control equipment for dynamic effects.Manufacturing Laboratories, Inc.
4 Manufacturing Laboratories, Inc. MLI’s Product MixMetalMAX™ is our main product.A predictive analytical package to determine optimum dynamic operating conditions without machining and track this information for use in NC programming.Validation and diagnostic functionality delivered by Harmonizer®Harmonizer® separately marketed machine monitoring and control packages for detection and control of adverse vibrations.Manufacturing Laboratories, Inc.
5 MetalMAX: What’s Needed? Modal analysis kit specifically configured and designed for measurement of machine tools.Frequency/modal Analysis.Sensors.Well established cutting theory.All combined in user friendly software.Setup man or engineer with progressive attitude. (does not require a “vibration expert”).MLI’s MetalMAX™ kit with computer.Manufacturing Laboratories, Inc.
6 A Typical Measurement Setup 4321EXCITATION(HAMMER)RESPONSE(ACCEL)Sensor Interface ModulePCAccelerometerSTRIKEHammerPower CableSensor CableMachine tooland Spindle*Can also measure work piece ina similar fashion and combine behaviorwith cutting tool measurement.Schematic of Measurement Setupfor “Bump”, “Ping” or “Modal” test.Manufacturing Laboratories, Inc.
7 Stability Plot 20 mm 3-fluted Tool in 30 kW 24 krpm Spindle ProcessDampingRegionTorque LimitUnstableStableChatterFrequenciesManufacturing Laboratories, Inc.
8 Purpose? Machine the Part the First Time… Air frame tray, unsupported tab approx. 50-mm high by 1.5-mm thick.Guessing?KnowingManufacturing Laboratories, Inc.
9 Manufacturing Laboratories, Inc. Check ResultsMonitor cutting operationDetermine if it is stable, chattering or resonating.Make fine adjustments if needed.Manufacturing Laboratories, Inc.
10 Manufacturing Laboratories, Inc. Record ResultsRecord data for later comparison or analysis.Track behavior as function of cutting tool, machine, work piece.Provide means to inform NC programmers, tool room, etc. of dynamic limitations.Manufacturing Laboratories, Inc.
11 Manufacturing Laboratories, Inc. MetalMAX ProvidesModal Analysis of cutter and work-piece.Prediction of stable depths of cut and spindle speeds.Refinement of process parameters for optimal dynamic cutting accuracy.Monitoring and adjustment (if needed) of cutting process.Recording of results in database for later use.Manufacturing Laboratories, Inc.
12 Manufacturing Laboratories, Inc. Vibration MonitoringHarmonizer utilizesBroad banded frequency analysis.Audio detection of machining vibration.Identification of chatter and “suspected” resonant conditionsDeterministic process parameter (speed and feed) corrections to minimize vibration.Harmonizer implementations include:Handheld vibration monitorMost basic and lowest performing.Web BasedOccasional use, as needed, requires TCP/IP connection. Can also implement web-based monitoring.General computer softwareFull functioning vibration analyzer with chatter control features.NC IntegratedNC control linking with adaptive capacity.Manufacturing Laboratories, Inc.
13 Manufacturing Laboratories, Inc. Detecting ChatterMust know:Max. Allowable speedSpindle SpeedNumber of teethNothing elseTechniqueIdentifies ChatterRecommends new spindle speed.Spectral Analysiswith identifiedchatter frequenciesVibrationsignalManufacturing Laboratories, Inc.
14 Manufacturing Laboratories, Inc. Eliminating ChatterChatter EliminatedCan either increase cutting depths (ap or ae) or feed rate.Manufacturing Laboratories, Inc.
15 First Part Machined Correctly! 0.5 mm wall and floor thickness, 1 mm diameter pins,walls and pins 30 mm high.Manufacturing Laboratories, Inc.
16 Example: Increased Power and Increased Quality at lower speed Aluminum> 475% increase in Power and MRRSpindle Speed: 16,580 RPMAxial Depth of Cut 25 mmRadial width of cut 1.8 mmCut Power 1.75 kWGREAT SURFACE!!!Spindle Speed: 20,000 RPMAxial Depth of Cut 25 mmRadial width of cut 0.25 mmCut Power 0.3 kWBAD SURFACESame behaviorin other materialsManufacturing Laboratories, Inc.
17 Possible Inclusion of Harmonizer® into Mikron Smart Machine APS Non-intrusive additional sensor (microphone), audio (displacement) detection.Can utilize current vibration sensor(s), accelerometer, etc.Provides broad banded frequency analysis of cutting condition.Detects the presence of chatter and resonance.Besides enhancing APS’s machining monitoring/warning/diagnostic capabilities, Harmonizer can also provide deterministic process parameter corrections.Manufacturing Laboratories, Inc.
18 Areas for Cooperative Work Add Harmonizer technology to Mikron APS ProductHigh Frequency Chatter and Resonant Detection.On machine suggested speed and feed corrections.Part try-out corrections (controller linkage).Automated tool testing and optimization (control links with NC programs).Application Engineering and Field Service Support with MetalMAX product.Train and equip field service with dynamic solution package.Added diagnostic and service capabilities.Product representation through Mikron Distributors/sales offices.Help setup as part of a services division the capability to deliver dynamic analysis services.Provide support resources for MLI sales.Manufacturing Laboratories, Inc.
19 Packages for Machining Vibration Prediction and Control Machining Vibration SolutionsPackages for Machining Vibration Prediction and ControlPrediction and Monitoringof the Cutting ProcessMachiningsimulationsDrillSim*Recording and tracking information for use by NC ProgrammersManufacturing Laboratories, Inc.