manufacturing of a circular notch hinge as guiding system by electrical discharge machining
DESCRIPTION
ASMA Department Manufacturing laboratory. Manufacturing of a circular notch hinge as guiding system by Electrical Discharge Machining. CAD/CAM Department. Croquet Vincent ¹ ( [email protected] ), Merken Patrick² ( [email protected] ), - PowerPoint PPT PresentationTRANSCRIPT
Manufacturing of a circular notch hinge as guiding system by Electrical Discharge Machining
¹Université Libre de Bruxelles, CAD/CAM Department, CPI 165/14, av. F.D.Roosevelt 50, 1050 Bruxelles, Belgium²Université de Liège, ASMA Department-Manufactoring Laboratory, chemin des Chevreuils 1, 4000 Liège, Belgium
Croquet Vincent¹ ([email protected]), Merken Patrick² ([email protected]),Delchambre Alain¹ ([email protected]), Debongnie Jean François² ([email protected] )
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
M
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
1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 60
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
limit angle a (degré)
Thi
ckne
ss (
mm
)
Circular notch hinge's thickness for titanium, radius is the unit
Limit for machining
Thickness vs.radius and limit angle
The deflection angle is function of three parameters-the radius R -the thickness h0
-the material used
Maximum deflection angle
Bending stiffness
Notch hinge geometry
New profiles-ellipse -parabola-hyperbola-spline
Test bench-comparison between mathematical modelling and experimental results -show the accuracy of the manufacturing process-show the problems inherent in the manufacturing process
The notch hinge guiding system
The Electrical Discharge Machining by wire (EDMW)
The notch hinge parameters
Future work
R
hGb
M t25
0
9
8
a
R
hEbM 250
9
2
a
04
3
h
R
E
a
Torsionnal stiffness
Parabolic profile Test bench
Notch hinge dimensions (mm)Notch hinge guiding system
EDMW machineEDMW process
ASMA DepartmentManufacturing laboratory
CAD/CAM Department