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Manufacturing of a circular notch hinge as
guiding system by Electrical Discharge Machining
CAD/CAM Department
Croquet Vincent¹ (vcroquet_at_ulb.ac.be), Merken
Patrick² (p.merken_at_ulg.ac.be), Delchambre Alain¹
(adelch_at_ulb.ac.be), Debongnie Jean François²
(jf.debongnie_at_ulg.ac.be )
¹Université Libre de Bruxelles, CAD/CAM
Department, CPI 165/14, av. F.D.Roosevelt 50,
1050 Bruxelles, Belgium ²Université de Liège,
ASMA Department-Manufactoring Laboratory, chemin
des Chevreuils 1, 4000 Liège, Belgium
The notch hinge guiding system
Aim of the work Elaboration of an implantable
pump guiding system Advantages -absence of
relative movement between parts -possibility of
having low speed -small displacement -no
lubrification need -high compact resulting
system
Notch hinge dimensions (mm)
Notch hinge guiding system
The Electrical Discharge Machining by wire (EDMW)
Principle -based on the different voltage between
a metallic piece and the wire -piece placed in a
dielectric solution -the electrical arc formed
burns locally the material
EDMW machine
EDMW process
The notch hinge parameters
M
The deflection angle is function of three
parameters -the radius R -the thickness h0 -the
material used Maximum deflection angle
Bending stiffness
Torsionnal stiffness
Notch hinge geometry
Thickness vs.radius and limit angle
Future work
New profiles -ellipse -parabola -hyperbola -splin
e Test bench -comparison between mathematical
modelling and experimental results -show the
accuracy of the manufacturing process -show the
problems inherent in the manufacturing
process
Test bench
Parabolic profile