process and quality control with thermal spray diagnostics€¦ · diagnosing thermal spray why ?...
TRANSCRIPT
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4/15/2003 Oseir Ltd. 1
Process and quality controlProcess and quality controlwith thermal spray diagnosticswith thermal spray diagnostics
HCAT April 1.-2. 2003 - San Diego, CAby
Mr. Ismo LindénPresidentOseir Ltd.
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WHY ?
WHERE & WHAT ?
WHOW ?
DiagnosDiagnosinging Thermal Spray Thermal Spray
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Higher quality of thermally sprayed partsBetter coatings – competitive edgeBetter reproducibility - yieldLess coating defects - yield
=================================Cost savings & Customer satisfaction
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DiagnosDiagnosinging Thermal Spray Thermal SprayWHY ?WHY ?
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Measurement Is the Basis of QualityMeasurement Is the Basis of Quality
Measure
Control
Quality - through control
- through measurement
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- know what really happens in the process- understand why something happens- develop understanding how to achieve the
best quality for your coating- collect and analyze data for quality files- save information for tracing needs
For high quality process you need to:For high quality process you need to:
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- proper process characterization with realand actual process parameters
- establish process limits- real time, in-process continuous process
monitoring- automatic alerts if exceeding set limits- data logging for further improvement
Process control basicsProcess control basics
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DiagnosDiagnosinging Thermal Spray Thermal SprayWHERE ?WHERE ?
SprayWatch-2i images the particle flow andmeasures the most significant characteristics ofthe particles just before they form the coating onthe target surface
TorchSubstrate
Spray plume
Particles
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WHAT ?
DiagnosDiagnosinging Thermal Spray Thermal Spray
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SprayWatchSprayWatch-2i-2i
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SprayWatch SprayWatch – 2i– 2i
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SprayWatch SprayWatch – 2i– 2i
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Coating quality controlCoating quality control
+-0+-0+-0+-0SprayPosition
15254535ParticleFlux
0 degr.0 degr.-2,5 degr.-2,5 degr.Sprayangle
1400 C1400 C2150 C2250 CParticletemperature
700 m/s600 m/s180 m/s150 m/sParticleVelocity
HVOFXYZ
HVOFABC
PlasmaAl2O3
PlasmaZr2O3
Process
Parameter
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Trouble shooting of your processTrouble shooting of your process
measureddirectlydetectedindirectly
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WHOW ?
DiagnosDiagnosinging Thermal Spray Thermal Spray
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SprayWatchSprayWatch – Imaging – Imaging DaignosticDaignostic System Systemfor Thermal Spraying Processesfor Thermal Spraying Processes
Based on modernCCD camera andimage processingtechnologyFeatures on-line, in-process measurementof most importantspray and particleparameters
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DiagnosDiagnosinging Thermal Spray Thermal Spray
•Optical Stripe Filter(pat. pending) enablessimultaneousmeasurement of particlevelocity andtemperature using asingle CCD camera
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SprayWatch-2iSprayWatch-2iPrinciple of OperationPrinciple of Operation
Particle detection &velocity measurement
Exposure time 5-50 µs
Temperaturemeasurement
1-10 ms
Large measurement volume enablesdetection of hundreds of particles persecond and makes the system sensitive toeven the smallest changes in the spray
wavelength (nm): 400-1100 850 700
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SprayWatch TechnologySprayWatch TechnologyVelocity MeasurementVelocity Measurement
•A Digital image processingalgorithm developed by Oseirdetects the particles automatically
• Velocity of individual particlesis measured by time-of-flightmethod
•Range 10 - 1000 m/s, resolution~ 0.5 m/s
• No re-calibration needed
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SprayWatch TechnologySprayWatch TechnologyTemperature MeasurementTemperature Measurement
• Optical Stripe Filter (pat. pending) enablessimultaneous measurement of particle velocityand temperature using a single CCD camera
• The spray is imaged through the filter using1-10 ms exposure time
• Average temperature of particles ismeasured by two-color pyrometry atwavelenghts 700 and 850 nm
• Range: 1000 – 3500 °C , resolution ~ 5° C
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AdvantagesAdvantages
The whole spray width measuredsimultaneously for fast reliable, significantdata – scanning of spray not neededEasy to install with the help of visual imageEasy to operate and fast to set up for useIn process measurement with actualproduction settings
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- SprayWatch-2i standard system- SprayWatch-2i/compact system
- 90 and 180 degree options- SprayWatch-2i/portable system- Substrate IR measurement option- HiWatch laser option for cold spray etc.- multiple interface unit
SprayWatchSprayWatch-2i product family-2i product family
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SprayWatch-2i systemSprayWatch-2i system
CCD camera based diagnostics system forthermal spraying
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SprayWatch-2i/compactSprayWatch-2i/compact
-intended for continuousprocess monitoring andmounting on a robot
-only abt. 2 lbs weight
-same performance as thestandard model
-manual focus distance setting
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SprayWatch-2i/PortableSprayWatch-2i/Portable
For work on the road
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IR substrate surface temperatureIR substrate surface temperaturemeasurement optionmeasurement option
Range 0 – 500 C, other ranges possible with different sensor
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SprayWatch-2i/laser optionSprayWatch-2i/laser option
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Diagnosing Cold SprayDiagnosing Cold Spray
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Diagnosing Vacuum systemDiagnosing Vacuum system
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DiagnosDiagnosinging inside plasma flame inside plasma flame
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ApplicationsApplications
Yield maximization through– Better process understanding and control
Product quality developmentProcess developmentReal-time process monitoring & alarmsBasic research of Spray processesQuality control
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Tested withTested with
Industrial plasma systems from 2,5kW toover 200 kW power and from abt. 5g/minup to 500 g/min powder feedHVOF, HVAF, wire arc, detonationsystems, cold pray, vacuum systems etc.large number of various manufacturersspray systemsCeramic and metallic powders
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SummarySummary
Spraywatch-2i is a tool for improving your:customer satisfactionbottom line – profitability/competitivenesscoating characteristicsprocess controlquality controllife
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Q&AQ&A
Web pages: www.oseir.com
Contact: [email protected]
or
ITSC2003 booth #511