Biomedical Engineering Reference
In-Depth Information
Fig. 2
Density distributions in the periprosthetic pelvis for the initial and final state [
17
]
3 Manufacturing Concept
It is planned to produce the patient-individual hip-cup prosthesis by a two-stage man-
ufacturing process consisting of the following steps: The first step is the production
of standardized titanium sheet metal components with undersize. These standardized
components can be produced by means of punch-die forming (“conventional” deep
drawing with punch, blank holder and die) or HPF in large-scale production. In the
second step the true-to-size enlargement of the produced standardized components
is executed. This enlargement is realized by double acting rubber-die forming with
adjustable elastomer lower die considering the present patient-individual geometries
of the acetabula.
In the following the production of the standardized titanium sheet metal com-
ponents is considered in detail. Thereby comparative simulations are presented for
the identification of the appropriate method for the first production step. Taking into
account these simulations, the HPF-process will be introduced to the production of
the standardized components.
3.1 Comparative Simulations
Comparative simulations were executed to identify the most convenient method to
produce the standardized prosthesis [
18
]. This preliminary investigation consists of
