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The next step in making
CT components
Peter HoogerhuisPhilips Healthcare
January 27th, 2016
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January 27th, 2016 Philips Healthcare
• Introduction
• CT & X-ray basics
• Application meets technology
• Large volumes
• Process
• Balance
• Continuous improvement practices
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Content
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January 27th, 2016 Philips Healthcare
Smit Röntgen
• Part of Philips Healthcare
Business Unit Generators, Tubes & Components
• Leading OEM grid supplier
• Founded in 1930’s
• R&D – Manufacturing – Sales
• Located at Healthcare Campus in
Best, The Netherlands
• Serving both healthcare and
non-healthcare customers
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www.smitroentgen.com
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January 27th, 2016 Philips Healthcare4
CT & X-ray basics (1) X-ray tube
Detector
Generator
Cooling unit
Electronics
& Interfaces
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2
4
Basic components inside CT scanner
1
1) Anti Scatter Grid 2) Scintillator
3) ASG + Scintillator + Photo sensor + Electronics
4) High quality image
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January 27th, 2016 Philips Healthcare5
CT & X-ray basics (2)
Without ASG With ASG
Scattered x-ray
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January 27th, 2016 Philips Healthcare6
Application meets technology
2D ASG
3D Tungsten printing
1D ASG
Assembly
Improved image quality
Improved costprice
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January 27th, 2016 Philips Healthcare
Laser Powder Bed Fusion process
Laser Powder
Bed Fusion
Post ProcessingQuality
Assurance
Powder
Recycling
3D CAD File
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Marking &
Separation
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January 27th, 2016 Philips Healthcare8
Requirements
Product:
• Material: Pure tungsten
• Wall thickness <= 100μm
• Dimensional accuracy < 25μm
• Density >90%
Process:
• ISO 13485 certified
• Large volume manufacturing
10000-40000 pc/yr
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January 27th, 2016 Philips Healthcare
Large volumes
Robust processes:
• 3D printing
• Post Processing
• Metrology
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Lean manufacturing:
7 steps to standard work
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January 27th, 2016 Philips Healthcare
Large volumesProcess: 3D printing
• Powder development
• Optics and mechanics
• Process settings
• Long term behavior
• Material characteristics
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January 27th, 2016 Philips Healthcare
Large volumes: Process: Post-processing
• Platform separation
• Surface treatment
• Heat treatment
• Machining
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January 27th, 2016 Philips Healthcare
Large volumes:Process: Metrology
• Tactile
• Optical
• X-ray
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January 27th, 2016 Philips Healthcare
Large volumes: Balance
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• Challenges:
– Long Cycle Times (CT) towards short Takt Time (TT)
– Operator availability
▪ Short process-operator interval
▪ Handling multiple workspots in balance
0
10
20
30
40
50
60
70
EOS Laser Marking EDM Inspection
Minutes
Yamazumi - balancing
CT
TT
One piece flow impossible
� Batch production
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January 27th, 2016 Philips Healthcare
Robust processes & Lean Manufacturing:Enablers for short design cycles
Customer CAD drawingCustomer CAD drawing
Manufacturing CAD
drawing
Manufacturing CAD
drawing
Slicing and verificationSlicing and verification
Job preparation
and building
Job preparation
and building
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Measurement and
evaluation
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January 27th, 2016 Philips Healthcare
Take-aways
• Medical devices for diagnostic imaging
.... benefit from 3D printed components (quality vs. costs)
• Lean manufacturing
…. principles are directly embedded during production ramp-up
…. standard work for large volumes
…. eliminate waste and optimize added value
• In-house inspection tooling, measurement equipment
…. needed for fast feedback, short design cycle
• Be aware
…. of impact of post-processing
…. that moving to large volume gives new challenges
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January 27th, 2016 Philips Healthcare16
www.smitroentgen.comwww.smitroentgen.com