Festo BV-50- 40, BV-50-100 Operating Instructions Manual
219283
FESTO
PNEUMAl-lC
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Operating Instructions
for pneumatic feed units
type
BV-50-
40, BV-50-100
For short strokes and fast working cycles, e.g. on
high-speed presses in mass production in the precision, electrical, and watchmaking industries.
Feed units can be used to push in front of the tool or
to pull behind the tool, operating from right to left
in each case. Proper functioning is ensured in each
mounting position.
The housing of the feed unit has 4 fastening holes (10)
and is attached on the press table with socket head
cap screws to the tool or to an attachment angle. It
is advisable to attach the unit such that it can be vertically adjusted in order that the strip entry can at all
times be adjusted to the tool.
Material adjustment
With strips less than 30 mm wide, it must be ensured
that the strip is guided over the centre of the clamping piston (18) and is aligned with the tool centre. A
marking groove on the clamping gripper indicates the
centre of the clamping plate. The guide rollers (1)
are provided for lateral guidance and must be set to
the appropriate strip width. Make sure that they run
freely. With open clamping grippers, it is possible to
transport material which exceeds the width of the
feed unit.
Feed setting
Slacken clamping screws
(8),
turn set screw (4) until
the distance between stop (5) and feed brace corre-
sponds to the desired feed length. Retighten clamp-
ing screws.
Insert strip
Close hand slide valve (Figs. 1 and 2, item
22),
the
unit is now exhausted - insert strip - reopen hand
slide valve.
If strip or tape material is to be inserted against the
length stop, it is advisable to incorporate a further
hand slide valve into line P 1 for exhausting the grippers (Figs.
1
and 2, item 25).
Item Name
I
Guide roller
2
Stroke setting
Buffer plate
:
Fastening screw
Clamping screw for stroke setting
1:
Guide column
Fastening hole
;A
Lubrication nipple
Clamping piston, replaceable
Y
Centre
marking
To obtain the optimum cycling frequency, the control
line between valves 20 and 21 should not exceed
two metres in the pneumatic control (Fig. I). The
control signal for valve 20 can be obtained linearly or
rotary as required. With linear pick-up, an adjustable
control rail must be mounted on the press ram. With
press strokes over 15 mm, only rotary signal pick-up
is possible.
Reverse control (if feed unit is to operate in the
opposing direction)
Reversal of the feed direction and opposite starting position of the slide: interchange connections
C and D.
In general, the rotary type of signal pick-up is to be
preferred. This usually allows one to avoid resetting
of the control rail if tools are changed.
With both types of control, the timing of the pulse
output for the feed should be selected such that the
rams have wiped off and the tape is freely located in
the tool. The feed should be completed no later than
30’
after upper dead centre.
Reversal of feed direction with same starting position of the slide: interchange connections A and B.
Reversed starting position of the slide with same
feed direction: interchange connections A and B
and also C and D on the feed unit housing.
slackened.
The grippers can be shifted through
180°
such that the
opening is on the opposite side. To do this, the
socket head cap screws (7, front side) must be
Example:
Pneumatic control
Electra-pneumatic
control
Conirol elements
Item
Name
En-5&40
(100)
Pneumatfc
Electra-pneum.
control
control
2u
Air-operated valve
solenoid valve
VL-a-‘/a -6
MLC-0-% -9
21
Roller lever valve
R-3-)/,
22
Hand slide valve
w-311,
23
SewIce
unit
FRC-‘/a
24
Solenoid valve
MOC-3-114
(only requred
with
intermedIate
exhaust)
25
Hand
slide
valve
w-3-1/,
(only
with strip or
tape
material aqalnst
lenglh
stop)
-
1
26
Pressure regulator
L&‘#‘,
(only
wth low
press”re for
feed)
Tools with catch pins
Where cycling rate and ram stroke permit, it is possible to momentarily exhaust the holding grippers
with tools having catch pins (locating pin, pilots). A
solenoid valve type
MOC-3-‘/4
(24) fitted in line B
and operated by means of a cam disc and a limit
switch exhausts the holding gripper as soon as the
catch pin is inserted in order that the strip can be
centered.
The solenoid valve (Fig. 2. item 20) obtains its reversal
pulse from an electrical limit switch.
Ouantlty
Item Name
Pneum. Electra-pneum.
COfltWl
control
27
Distributor pieca
FR-4-‘/<
1
26
1
Quick
connector
1
TCK-’ d-PK-6
i -
1
1
29
Socket
joint
QM-‘I,-‘/,
1
301Duck
connector
1
CK-‘/*-PK.6
]
I3
2
31 1
Quick
connector 1
CK-‘4.PK-4
1
4 ’ 4
Quick
connector
CK-“8-PK-4
3
3
U-‘/d
2 2
I
LL
A service unit type FRC must befitted on the upstream
side of the entire control system. With this unit, the
compressed air is cleaned, regulated to constant
pressure (6 bar), and provided with a fine oil mist
for
lubricating purposes. The bearing bushes of the feed
brace must be lubricated from time to time by means
of lubricating nipple (II).
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