FIBRO Flex Cam, Руководство пользователя, Страница: 14 / 84

Flex Cam
2·
14186·2000·
1
°
subject to alterations
14
Step 4b
Size and stroke of the Power Unit
for different Cam Unit sizes
The total volume of oil in the Cam Units should be cal-
culated using the following formula. The total volume
of oil is the sum of all the volumes for all Cam Units.
The volume is the product of the piston surfaces and
strokes used. The total volume of oil V
N
for the Power
Units corresponds to the minimum volume of oil for the
Cam Units (in dm
3
). A
N
is the piston surface area in the
Cam Unit (dm
2
) as shown in table 2.
V
N
= [(A
1
s
1
) + (A
2
s
2
) ... (A
N
s
N
)] : 100 (Formula 1)
A
N
= Piston surface area of Cam Units
s
N
= Stroke length of Cam Units
The volume of oil of the selected Power Unit should
be greater than 0,189 dm
3.
For example, the
2018.20.06000.060 supplies 0,251 dm
3
.
(The 2018.20.04000.110 could also be used)
(see table 3)
Calculate the used stroke of the Power Unit:
s
Gerf
= ((V
N
: V
G
) s
G
) + 10
s
Gerf
= ((0,189 : 0,251) 50) + 10 (see formula 2)
s
Gerf
= 48 mm
In the above example, we recommend a Power Unit
2018.20.06000.060 with a used stroke of 48 mm. The
admissible Cam Unit stroke speeds defined in section
9 must not be exceeded. It should also be noted that
the Cam Units will have different stroke speeds if two
Cam Units are driven by a single Power Unit.
Example:
Select a Power Unit to operate a Compact Cam
2018.11.01500.049 and a Force Cylinder
2018.30.04000.050 with a used working stroke of just
40 mm.
V
N
= [(A
WK
s
WK
) + (A
AZ
s
AZ
)] : 100
V
N
= [(0,13 49) + (0,31 40)] : 100 (see formula 1)
V
N
= 0,189
Select the appropriate Power Unit from Table 3.
The Power Unit must supply the minimum volume of
oil as calculated above. Calculate the required Power
Unit stroke s
Gerf
using the following formula:
s
Gerf
= [(V
N
: V
G
) s
G
] + 10 (Formula 2)
V
N
= Total volume of oil of Cam Units
V
G
= Total volume of oil of Power Unit
s
G
= Power Unit stroke
s
Gerf
= Power Unit stroke required
Total volume of oil of Cam Units: V
N
= dm
3
Power Unit stroke used: s
Gerf
= mm
WK AZ AK 15 kN 40 kN 60 kN 90 kN 150 kN
A
N
(dm
2
) 0,13 0,31 0,50 0,79 1,23
Tab. 2: Piston surface area of Cam Units
Stroke Nominal Power Unit size 2018.20.
length stroke length s
G
15 kN 40 kN 60 kN 90 kN 150 kN
.035 25 0,031 0,078 0,126 0,196 0,307
.060 50 0,063 0,156 0,251 0,393 0,614
.110 100 0,126 0,312 0,502 0,785 1,227
.160 150 0,188 0,468 0,753 1,178 1,841
Tab. 3: Volume of oil of Power Unit V
G
(dm
3
)
WK = Compact Cam 2018.11. .
AZ = Force Cylinder 2018.30. .
AK = Flange Cams 2018.12. .
Step 5
Select appropriate hoses and screwed couplings. The
maximum admissible hose length between Power Unit
and the Cam Unit is 2000 mm. The nominal hose dia-
meter is determined on the basis of the size of the
Power Unit. The hose size is matched to the flow of oil
(see page 48).
➭
It is easiest to determine the correct hose
length if both Power Unit and Cam Unit are
installed inside the tool.
Remember to protect the hose against sharp edges
etc. The hose moves slightly during operation due to
the pulsating oil pressure.
Observe the minimum bending radius.
Depending on the press speed a nominal hose width
smaller than the standard nominal width may be used
(see table 4).
Nominal hose size Press speed
Standard nominal
width Max. speed
Power Unit 0,8 m/s 0,6 m/s 0,4 m/s 0,2 m/s
2018.20.01500 DN 12 DN 12 DN 12 DN 12
2018.20. 04000 DN 20 DN 20 DN 12 DN 12
2018.20. 06000 DN 25 DN 20 DN 20 DN 12
2018.20. 09000 DN 25 DN 25 DN 20 DN 12
2018.20. 15000 DN 32 DN 32 DN 25 DN 20
Table 4: Press speed/nominal hose size
014_14122 30.08.2006 10:59 Uhr Seite 3