CEWAC is a Belgian service centre to the industry performing studies and applied research, founded in 1989. We are located close to the borders with the Netherlands, Germany, Luxemburg and France. Our two main divisions are: a) assembly and material testing b) hydraulics and hydromechanics more info on: www.cewac.be

1. www.cewac.be
Walloon research centre for the study of
assembly technology and material testing
The European Union and Wallonia invest in your future.

2. www.cewac.be
CEWAC asbl.
 Service centre to the industry performing studies and applied research,
founded in 1989.
 Two main divisions :
 Assembly & Material testing :
 welding, brazing, mechanical joining and mixed joints (WPS, WPQR, WQ)
 destructive and non-destructive testing (acc. ISO 17025)
 Industrial Hydraulics and Hydromechanics
 Target : mainly SME’s (comparable size and culture)
 Multiple disciplines and flexibility : synergy between divisions
 Support and management during all project phases
 Feasibility studies, simulations, design, prototyping, pre-series …
 Technical expertise

3. www.cewac.be
Assembly & Materials testing
(in the field of material joining )
 Welding, Brazing, Mechanical joining and mixed joints
 Non-destructive testing, accreditation acc. ISO17025
(performed in our laboratory or on site).
 Destructive testing, accreditation acc. ISO17025 (for most of our tests).
 Welding procedure specification and qualification, welder qualification.
 Design and calculation of welds, FE modelling (COSMOS)
 Support concerning the choice of appropriate welding methods,
parameter optimization …
 Technical support and follow-up on relevant standards
 Training (in collaboration with Technifutur, CPE, Technofutur,… )

4. www.cewac.be
Assembly – available technology
 Arc welding (SMAW, GTAW, GMAW, Plasma)
 Micro-welding by arc (Micro-GTAW, Micro-plasma)
 Laser welding (continuous YAG laser, pulsed YAG laser,
Fibre laser)
 Hybrid laser-arc welding (YAG and GMAW)
 Friction stir welding (conventional FSW and FSW by robot)
 Friction welding
 Electron beam welding (down to ultra-high vacuum)
 Resistance welding (spot and seam)
 Other joining methods (brazing, rivetting, clinching)

5. www.cewac.be
Assembly – our equipment
Laser welding machine : Electron beam welding : 6kW
200W Pulsed YAG Laser + Work piece max. 500x500x500mm Resistance
400W Continuous Fibre Laser seam welding
and
spot welding
Hybrid laser-arc welding :
3kW YAG laser + GMAW
FSW by robot Conventional FSW Rotational friction welding

6. www.cewac.be
Assembly – some examples
Longitudinal FSW of tube (2mm) Laser welding of thin walled tubes (0,2mm)
Resistance welding : grid
on a thick base plate )
(0,1mm) into sheet material
Laser welding
of perforated Spot welding :
Platinum plate cupper strands
(0,5mm) on stainless
FSW welding of sheet material steel
(0,5mm) brass-cupper
FSW welding : 25 mm of
aluminium in a single pass
GTAW :
joining GTAW :
Electron beam 0,1mm
profiles welding of
(0,5mm) pellet on
Tantalum tube thick
(0,5mm) material

7. www.cewac.be
Non-destructive testing
 Non-destructive testing, accreditation acc. ISO17025
(Testing performed in our lab or on site).
 Penetrant testing (PT)
 Magnetic testing (MT)
 Radiographic testing (RT) : analogue or digital, micro-source,
radioscopy and 3D tomography
 Ultrasonic testing (UT)
 Visual inspection – Endoscopy (VT)
 Thermographic inspection (IRT)
 Helium leak testing (HLT)

8. www.cewac.be
Non-destructive testing
Micro-source RT of a
valve system
Fluorescent PT installation Radiography and tomography installation
>176,6°C
On site MT
12,8°C
IR thermography :
Tomographic analyses Analysis of hot spots
Colour contrast PT :
Cast aluminium bracket
Helium leak Ultrasound
Photo 1: before test
testing testing
Photo 2: after applying the penetrant
Photo 3: indications after development

9. www.cewac.be
Destructive testing
 Destructive testing, accredited acc. ISO17025 (most of our tests).
 Visual inspection and fractography
 Macro- and Micrography
(grain count, weld …)
 Hardness and µ-hardness testing
 Tensile, compression, fatigue and
bending testing
 Impact testing
 Alloy analysis (composition)

10. www.cewac.be
Hydraulics and Hydromechanics
(technology concerning fluid mechanics)
 Study and design of hydromechanical applications : theoretical modelling and simulation
(analytical, FEA) and experimental set-up
 Development of technological demonstration models and industrial prototypes
 Design and production of client specific test benches and associated procedures
 Production of pre-series concerning components or devices developed at CEWAC
 Technological support and follow-up on relevant standards, audits
 Environmental testing, quality control and characterisation (ISO 17025 accredited) :
 Measurements and characterisation of pneumatic and hydraulic elements:
 Pressure : from vacuum to high pressure.
 Temperature : from cryogenics to high temperature (fire testing).
 Various types of fluids : water, oil, air, N2, CO2, helium.
 Flow rate : from µ-flow to 30 litres/sec.
 Characterisation of separators for water - hydrocarbon/grease.
 Flow visualisation (high-speed camera (800 images/s), IR thermal camera).

11. www.cewac.be
Hydraulics and hydromechanics
- Testing
Low temperature (0 to -150°C) or
cryogenic (down to -196°C) testing Characterisation and testing of
water-hydrocarbon separators
Fire testing of valves
Vacuum testing
Pressure testing (up to 1600bar) Filter efficiency characterisation

12. www.cewac.be
Hydraulics and Hydromechanics
- Studies
600
Prélèvement 1
Prélèvement 2
500
Prélèvement 3
DBO tolérée
LABO (cuve 1)
LABO (cuve 2)
400 LABO (cuve 3)
300
200
100
0
27-11-06 22-12-06 16-01-07 10-02-07 07-03-07 01-04-07 26-04-07 21-05-07 15-06-07 10-07-07 04-08-07 29-08-07 23-09-07 18-10-07
Study, design, characterisation and prototyping
of a purification micro station type 6 EH
Characterisation of the flow rate
coefficient (Cv) of a regulating valve
Study and hydromechanical characterisation
Development of medical
of wastewater treatment canalisations.
equipment (infusion set)

13. www.cewac.be
Co-financed projects at Cewac
 Technological support for the industry in general
 SOUDTECH (welding technology in assembly and repair)
 GESTECO (problem-solving in hydraulics and hydromechanics)
 Collective research projects
 ARCLASER (hybrid laser-arc welding) and SOUDIMMA (magnetic pulse welding)
 STEELFSW (FSW of steel and materials alike) : start 2011
 PME-TANE (development of a methanisation unit) : start 2011
 EFRO
 MICROSOUD + INTROTECH PME (development of a micro welding users platform
and associated material testing + creation of industrial awareness)
 NDT Laser (development of an in-process control for laser welding)
 MEDIPUMP (development of medical equipment)
 Cornet
 INCOPI (production of inside coated pipes with high fouling resistance) : start 2012
 Projects concerning Friction Stir Welding
 Transtir II (Industrial introduction of FSW and µ-FSW + production of technological
demonstrators)
 STIRHETAL (welding of dissimilar aluminium joints)

14. www.cewac.be
www.cewac.be info@cewac.be
- Thank you for your attention -
Cewac ASBL
Liège Science Park
Rue Bois St-Jean, 8
B-4102 OUGREE
Tel: 04/256.94.00
Fax: 04/264.60.34