Cincinnati 175 CB - Punching Capacity; Stripping Capacity

BOTTOMING DIES: The primary purpose of bottoming dies
is to provide greater accuracy than air bend dies. They
can also be used to obtain a relatively sharp inside corner.
They are made in matched pairs, according to the thickness
of the stock to be formed and radius required. See
Figure 21. These dies require three to ten times as much
pressure as air bend dies. Other types of bottoming dies
are coining dies, used to obtain a sharp inside radius,
multiple bend and channel dies, and radius bend dies.
DIE SETS
Special care should be taken when operating die sets with
guide pins and bushings. The top stop position should be
set so the bushings never leave the guide pins when the
ram makes an UP STROKE. Re-entry of the guide pins
in to the bushings may be difficult, if not impossible.
PUNCHING CAPACITY
CINCINNATI Hydraulic Press Brakes are rated to perform
punching loads up to 66% of the maximum machine capacity
when punching mild steel using self-contained units on an
occasional basis. When punching is to be performed on a
continuous production basis, with dedicated die sets or
high tensile (70,000 PSI) material is to be processed, the
punching capacity is reduced to 50% of the maximum
machine capacity, Figure 23. Additional punching capacity
can be obtained by stepping the punches (Figure 24) on
multiple levels. For special punching applications, where
die sets or special machine features (for example, wide
bed, deep throat, etc.) are required, consult CINCINNATI
INCORPORATED.
BOTTOMING
FIGURE 21
CINCINNATI INCORPORATED can provide many other types
of standard and special dies, some of which are shown in
Figure 22.
MAXIMUM PUNCHING CAPACITY
CB SERIES
TONS/LEVEL
MILD STEEL
HI-TENSILE
90 CB
60
45
135 CB
90
67.5
175 CB
115
87.5
230 CB
150
115
350 CB
230 175
T= METAL THICKNESS
THREE LEVELS
TWO LEVELS
ONE LEVEL
FIGURE 23
MULTIPLE lEVEL PUNCHING
RADIUSCHANNEL
OFFSET
3 OR 4
WAY
VEE DIE
FIGURE 24
STRIPPING CAPACITY
A stripping load is a force which occurs on the up stroke
of the ram. The direction of this type of load is down on
the ram and up on the bed (the reverse of forming and
punching loads). Figure 25 shows the maximum stripping
load available at the center of the machine.
HEMMING
FIGURE 22
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