PWA Bernardo 1320 S User manual

OPERATOR’S MANUAL
PWA HandelsgesmbH
Nebinger st raße 7a A-402 0 Linz / Aust ria
Tel.: +4 3 / 73 2 / 6640 15 Fax: +43 / 73 2 / 66401 5-9
E- M ai l : i n f o
@pw a.at Hom epage: ww w .bernardo .at
Maschinen - Austria

Identification
A. Slip Roll Cover
B. Slip Roll Rollers
C. Adjustable Work Lever Hub
D. Shear and Brake Adjustable Stop
E. Work Lever
F. Shear Guide
G. Steel Shear Blade
H. Shear Table
I. Shear Hold Down and Finger Guard
J. Brake Finger Receiver
K. Brake Fingers
Figure 1
Slip Roll
Brake
Shear
A
I
C
D
E
F
G
H
J
K
B

Setup
The 3 in 1 machine comes from the factory almost
fully assembled. However, some disassembly
is required to remove storage grease and to
relubricate the cleaned parts.
To set up your machine:
1. Insert both work levers into the hubs and
secure in place with two lock knobs (Figure
2).
4. Using the 17mm wrench, tighten both M16-2
hex nuts to lock the stop rods in place.
Note: In the current position where the stop
flange is pointing up, the stop assembly is
used for the brake. If the flange is inverted to
point down, the stop assembly is used for the
shear.
5. Fasten both stop blocks to the stop flange
with the two M12-1.75 x 20 hex bolts, both flat
washers, and install the stop blocks onto the
stop rods as shown in Figure 4 .
6. Using the work lever, position the finger
receiver to the uppermost position (Figure
5).
Figure 2
Hub
Work
Lever
Handle
Lock
Knob
2. Using a 17mm wrench, install four work lever
handles onto both work levers (Figure 2).
3. Thread one M16-2 hex nut onto each stop rod
and thread both rods into the lower holes of
the outfeed side of the casting (Figure 3).
Figure 3
Upper and
Lower Holes
Figure 4
Stop
Flange
Stop
Rod
Stop
Block
Figure 5
Cap Screws
Gib
Fingers
Finger
Receiver
Finger
Removal
Path
Finger Seat

8. Unscrew the thickness adjustment leaf bolt
until the gap (Figure 7 ) between the leaf
bolt and the bushing is wider than the thick-
ness of the workpiece.
7. Unscrew the diameter adjustment knobs
until the rear roller is backed-off completely
(Figure 6 ).
Figure 6
Diameter Adjustment
Knob
Work
Lever
Rear
Roller
Gap
Figure 7
Thickness
Adjustment
Leaf Bolt
9. While rotating the work lever, feed the sheet
metal between the top and bottom rollers
(Figure 8 ) until approximately 1-inch pro-
trudes through the other side.
10. With the metal positioned between the top
and bottom rollers, tighten the thickness
adjustment leaf bolts until they are snug.
11. Tighten the diameter adjustment knobs to
raise the rear roller a few millimeters to get
your initial bend setting.
Note: The heavier the gauge of metal, the
less aggressively you can adjust the rear
roller. With rigid metals such as aluminium,
you may have to leave the rear roller at the
lowest position and make more rolling repeti-
tions to achieve the needed bend radius.
Tip: To ease feeding the workpiece past the
third roller on the first rolling operation, use
the brake first to make a slight initial bend
in the workpiece, so the workpiece does not
butt up against the rear roller, but rather rides
up and over the roller.
Figure 8
Top Roller
Bottom Roller
Bushing

12. Rotate the work lever to feed the sheet metal
through the rollers (Figure 9 ). Often after
the first feed is made, an initial flat is cre-
ated (Figure 10) at the leading tip of the
workpiece.
Figure 9
Figure 10
The Initial
Flat
13. To remove this flat, rotate the workpiece and
feed it in from the tail end this time (Figure
11). This step may have to be repeated a few
times depending on the final radius required.
Figure 11
14. In small increments, tighten the radius adjust-
ment knobs for each and every subsequent
pass until the needed bend radius or cylinder
diameter is reached.
Note: To create cones, adjust the rear roller
on one end only.
15. To remove a cylinder, loosen the thickness
adjustment leaf bolt, and rotate the lock leaf
pin so the flat in the pin (Figure 12 ) allows
the end of the top roller to be removed.
16. While you hold the end of the roller outward
(Figure 12 ), and the other end is pressed
in the machine, have an assistant slide the
cylinder off. The roller is heavy, so do not try
this alone.
Figure 12
Leaf Lock
Pin Flat is
Exposed
Leaf Bolt
Backed-Off
We recommend getting assistance to sup
port the top roller while removing cylin
ders. Failure to adequately support the top
roller may result in the roller falling, causing
crushing injuries.

To use the wire grooves:
17. Place your workpiece into the smallest pos-
sible groove on the wheel. The three sizes
are 1⁄4", 5⁄16", and 3⁄8" (Figure 13 ).
Example: Suppose you want to bend a piece
of 1⁄4" rod. Though it would fit in any of the
three grooves, you would use the 1⁄4" groove
since it is the smallest possible groove that
the rod will fit into.
Figure 13
1⁄4"
5⁄16"
3⁄8"
To perform a basic bending operation:
18. Draw or scribe a line in the sheet metal where
the bend is to take place.
19. Use the work handle to lower the finger
receiver and insert the metal between the
fingers and the receiver (Figure 14 ).
Figure 14
20. Line up the bend line that is drawn or scribed
into the sheet metal with the tips of the fin-
gers (Figure 15 ).
Note: For long workpieces or for quick repeat
-
ability of bends in multiple pieces of sheet
metal, the adjustable stop can be used for
speedy alignment.
Figure 15
Figure 16
21. While holding the sheet metal steady, use
the work lever to raise the finger receiver
and bend the workpiece to the desired bend
radius (Figure 16 ).

Figure 17
22. Lower the finger receiver and remove the
workpiece (Figure 17 ).
Bending operations require the fingers to be in line
with the finger receiver. When moved, the fingers
are held stationary while the work lever raises the
workpiece and finger receiver into the tips of the
fingers. As a result a bend occurs. If a pan or box
bend is desired, choose a finger or a selection of
fingers that are as close as possible to the length
of the pan or box side lengths. Remove the fingers
that may interfere with the bend.
Tip: During a bending operation, the fingers push
the sheet metal down into the groove of the finger
receiver. As the sheet metal slides down into the
groove, scoring may occur. To avoid these marks,
keep the receiver free of burrs, and adhere a strip
of tape on the workpiece underside along the
location to be bent.
To cut sheet metal:
Adjust the rear stop to fine tune your cut
length (Figure 18). For the most accurate
cuts, make sure that you have at least one
square edge of the workpiece up against the
stop or a guide.
24. Place your workpiece to the far left of the
shearing table and against the guide (Figure
19).
Figure 18
Figure 19
Stop Assembly
23.

25. Keeping all body parts away from the blade,
use the work lever to begin the shearing
action of the two blades. The shearing action
begins at the left of the workpiece and cuts to
the right (Figure 20 ).
Figure 20
26. When the cut is complete, release the metal
from the rear of the machine.
Lubrication
Figure 21
Table
Fingers
and
Receiver Blades
Lubricating the machine consists of applying
lubricant to the gears, adjustment screws, and the
roller bushings.
To lubricate the machine with grease:
Open the slip roll cover and brush a light coat
of multi-purpose grease on the gear teeth at
the end of the rollers (Figure 22). Turn the
work lever to disperse the grease.
Figure 22
Rollers
Using a grease gun filled with multi-purpose
grease, wipe both grease fittings off and
apply two pumps of grease to each fitting on
each hub (Figure 23). Turn the work lever to
disperse the grease.
Figure 23

Troubleshooting
Slip Roll Operation
Symptom Possible Cause Possible Solution
Slip roll creates
cones when trying
to create cylinders.
1. Rollers are not parallel. 1. Adjust rear roller adjustment knobs as necessary to
be sure the rear roller and top roller are parallel.
A noticeable crease
is formed in the
workpiece.
1. Excessive pressure applied in one spot. 1. Reduce the radius and perform the bend in several
passes.
Workpiece is pitted. 1. Workpiece is dirty, roller is damaged. 1. Clean workpiece, polish out any nicks in the rollers.
Brake Operation
Symptom Possible Cause Possible Solution
Heavy resistance
during bends.
1. Machine capacities are exceeded. 1. Use materials within the capacity of the machine.
Bend radius is not
consistent across
workpiece.
1. Machine capacities are exceeded.
2. Fingers and finger receiver not aligned.
1. Use materials within the capacity of the machine.
2. Adjust brake alignment.
Point of fingers are
chipping or rolling.
1. Fingers and finger receiver not aligned.
2. Workpiece is too thick.
1. Adjust brake alignment.
2. Use materials within the capacity of the machine.
Workpiece shows
scoring marks after
bend.
1. Fingers or finger receiver has scratches. 1. Polish out scratches, and apply tape at the bend
locations for protection.
Shear Operation
Symptom Possible Cause Possible Solution
Won't cut
material.
1. Improper blade gap distance.
2. Cut exceeds machine capacities.
1. Widen gap to accommodate thicker gauge material.
2. Make cuts within the capacity of the machine.
Cuts aren't
square. 1. Blade gap unequal across length.
2. Too much bow in blade.
3. Inadequate hold-down pressure.
4. Uneven contact with guides.
1. Adjust blade gap to be equal across length.
2. Adjust blade bow.
3. Adjust gap of hold-down.
4. Maintain consistent contact with guides.
Poor quality of
cuts, ripping or
tearing.
1. Dull blades.
2. Poor blade gap set up.
3. Loose blade.
1. Replace or sharpen blades.
2. Adjust blade gap
3. Remove blade, clean blade mounting, and reinstall.

Parts Drawing for 3 in 1-1320mm

PART# DESCRIPTION PART# DESCRIPTION
1 Left Wall 32 Upper Pressing Roll
2 Cutting Table 33 Cover
3 Crossbeam 34 Pressing Roll Lock
4 Crank Arm 35 Shaft
5 Ringht Wall 36 Washer
6 Bear Frame 37 Jacket
7 Cover 38 Roll Key
8 Press Plate Bracket 39 Hex Bolt
9 Spring 40 Hex Screw
10 Pressing Plate 41 Hex Bolt
11 Lower Die 42 Hex Screw
12/1-6 Upper Die 43 Hex Bolt
13 Die Pressing Plate 44 Hex Bolt
14 Bolt 45 Hex Screw
15 Rolling Wheel 46 Washer
16 Guide 47 Hex Bolt
17 Adjustable Bolt 48 Hex Bolt
18 Handle 49 Washer
19 Screw 50 Nut
20 Positioner 51 Hex Bolt
21 Positioning Plate 52 Hex Screw
22 Supporting Plate 53 Hex Screw
23 Blades 54 Hex Screw
24 Back Pressing Roll 55 Washer
25 Screw 56 Hex Bolt
26 Handle Knob 57 Hex Screw
27 Adjustable Bolt 58 Hex Screw
28 Roll Bushings 59 Hex Screw
29 Washer 60 Adjustment Screws
30 Cear 61 Washer
31 Lower Pressing Roll
PARTS LIST

Maschinen - Austria