Dukane DPC II Plus 9001:2000 - Manual (Page 147)

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Dukane Manual Part No. 403–566–01
Section 13 – Care & Maintenance
Crowning
A surface which is burnished only in the inner ring
area around the stud, indicates the surface is con-
vex or crowned. An example of this is shown in
figure 13–5. To get an idea of amount of devia-
tion from a flat surface, place a straight edge along
the stack element. Since its surface is higher at
the center than at the edges, there will be a gap at
the outer edge of the element.
Center Depression
A surface which is burnished only in the outer ring
area around the edge, indicates the surface is con-
cave or depressed. An example of this is shown in
figure 13–6. To get an idea of amount of deviation
from a flat surface, place a straight edge along the
stack element. Since its surface is higher at the edge
than at the center, there will be a visible gap near
the center indicating the depth of the depression.
Straight
Edge
Crown
Gap
Straight
Edge
Gap
Corrosion
Corrosion is a factor to consider when determin-
ing the overall system performance. Over time,
corrosion can build up on the mating surfaces of
the acoustic stack. This build up interferes with
the efficient transfer of ultrasonic energy to the
parts to be welded. It may contribute to a loss in
performance. Evidence of corrosion build up in-
cludes discolored mating surfaces or surfaces en-
crusted with hard deposits. To extend equipment
life and maintain performance levels, minimize
the system's exposure to corrosive sources.
Figure 13–5 Crowned Surface
Figure 13–6 Center Depression