Biomedical Engineering Reference
In-Depth Information
8.6.2 Geometric Inspection
Microrings were employed for the geometric inspection. These rings were designed
for a micromechanic filter (one of the applications of the proposed technology). The
solid model and sample of the microring are shown in Fig.
8.23
. Table
8.4
contains
the measurements of the microrings. The corresponding measurements are pre-
sented in Fig.
8.30
. The measurement results are shown in Table
8.5
.
Errors of the produced pieces depend on the machine tool, the instruments, and
the details machined. These errors allow for the characterization of the microma-
chining center. For this reason, we use this indirect method to characterize the
micromachine tool. The results obtained are satisfactory because the difference
between the practical and theoretical results is sufficiently low. The comparison is
shown in Table
8.6.
Table 8.4 The measurements of microrings for geometrical analysis
Measurement
name
Description
M
Exterior diameter of the microring base.
S
Distance between the diameters (interior and exterior of the microring base)
N
Diameter corresponding to the intersection of conic surfaces
P
Distance between the conic surface intersection and the interior diameter of the
cylindrical part of the microring
Q
Height of the cylindrical part of the microring
Fig. 8.30 The microring
measurements
Table 8.5 Measurement results
Machining type
Average measurement (
m
m)
Average error
(
m
m)
Cylinder machining (M)
1258.45
20.11
Drilling (S)
205.47
38.28
Cone machining (N)
981.30
62.19
Cone machining (P)
64.63
37.00
Cone machining (Q)
476.79
34.82
