Embed Size (px)
Citation preview
The next step in making
CT components
Peter HoogerhuisPhilips Healthcare
January 27th, 2016
January 27th, 2016 Philips Healthcare
• Introduction
• CT & X-ray basics
• Application meets technology
• Large volumes
• Process
• Balance
• Continuous improvement practices
2
Content
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
3
www.smitroentgen.com
January 27th, 2016 Philips Healthcare4
CT & X-ray basics (1) X-ray tube
Detector
Generator
Cooling unit
Electronics
& Interfaces
3
2
4
Basic components inside CT scanner
1
1) Anti Scatter Grid 2) Scintillator
3) ASG + Scintillator + Photo sensor + Electronics
4) High quality image
January 27th, 2016 Philips Healthcare5
CT & X-ray basics (2)
Without ASG With ASG
Scattered x-ray
January 27th, 2016 Philips Healthcare6
Application meets technology
2D ASG
3D Tungsten printing
1D ASG
Assembly
Improved image quality
Improved costprice
January 27th, 2016 Philips Healthcare
Laser Powder Bed Fusion process
Laser Powder
Bed Fusion
Post ProcessingQuality
Assurance
Powder
Recycling
3D CAD File
7
Marking &
Separation
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
January 27th, 2016 Philips Healthcare
Large volumes
Robust processes:
• 3D printing
• Post Processing
• Metrology
9
Lean manufacturing:
7 steps to standard work
January 27th, 2016 Philips Healthcare
Large volumesProcess: 3D printing
• Powder development
• Optics and mechanics
• Process settings
• Long term behavior
• Material characteristics
10
January 27th, 2016 Philips Healthcare
Large volumes: Process: Post-processing
• Platform separation
• Surface treatment
• Heat treatment
• Machining
11
January 27th, 2016 Philips Healthcare
Large volumes:Process: Metrology
• Tactile
• Optical
• X-ray
12
January 27th, 2016 Philips Healthcare
Large volumes: Balance
13
• 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
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
14
Measurement and
evaluation
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
15
January 27th, 2016 Philips Healthcare16
www.smitroentgen.comwww.smitroentgen.com
