REMS Unimat 75 Instrucciones De Servicio página 13

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Fit the cover (Fig. 2 (4)), tighten the screws (8) and check the smooth action
of the closing lever. This must move backwards and forwards to both end posi-
tions by hand (open and close the die set). If not, the dies set must be removed
again and the square bar, holder and cover recleaned. Improper handling can
also damage the edges of the holders. This damage must be repaired properly
with a fi ne or oilstone. If the die set is changed in the machine, make sure that
the universal automatic die head is aligned with the closing lever at the top to
remove the holders from the universal automatic die head so that no chips can
fall into the gap between the adjustment spindle. Only remove the holders in
the order 1, 2, 4, 3.
Set the closing lever to the down position before inserting the new die set. First
insert holder no. 1 then the other holders in the order 2, 4, 3.
4. Operation
4.1. Right hand thread – left hand thread
NOTICE NOTICE
Make sure that the right closing lever has been inserted and the stop screw
mounted correctly for the selected die set (see 3.2.) and that the direction of
rotation of the universal automatic die head is set correctly at the changeover
switch (Fig. (5)) (see 2.2.).
4.2. Setting the thread size
Make absolutely sure that the closing lever (Fig. 2 (1)) is touching the stop
screw (3) during the setting process, i.e. The universal automatic die head is
closed. The desired thread size is set with the square wrench (Fig. 5 (9)) at
the setting spindle (Fig. 2 (10)). The rough setting is made by adjusting the
setting spindle until the appropriate mark on holder no. 1 in the oval window
(Fig. 2 (11)) is in line with the mark in the die head (Fig. 2 (38)). The fi ne setting
is made using the fi ne setting table enclosed with every die set (Fig. 14) the
number of which must match the number of the corresponding universal auto-
matic die head. A setting number (45) of the adjusting spindle is noted in the
fi ne setting table for every thread size (Fig. 14 (44)). This setting number must
be brought into line with the mark on the universal automatic die head above
the adjusting spindle (Fig. 2 (12)). Always approach the setting number by
turning to the right. If the setting number is „8", for example, the adjusting spindle
must be set to „6" or „7" and then moved to the „8". The mark on the opposite
side (13) applies for left hand threads. Approach this setting number by turning
to the left. If die sets were delivered without a fi ne setting table, the setting
number must be defi ned by the user himself with a calliper gauge, a thread
gauge muff or a sample thread. In any case the achieved thread size must be
remeasured after every setting.
4.3. Setting the length stop
The desired thread length is set at the length stop (Fig. 4 (14)). To do this,
release the clamping lever (15) and set the length according to the scale (16).
Move the gear unit with the start cutting lever (17) to the left if necessary. On
a tapered pipe thread the standard thread length is achieved automatically
when the length stop is set to the desired thread size according to the scale
(16). The zero mark on the length stop must be set to the respective thread
size for this.
Long thread see 4.6.
4.4. Selecting the speed
REMS Unimat 75 has 2 speeds. For smaller thread diameters (up to approx.
45 mm) the speed 70 rpm is selected by pressing button II (Fig. 4 (18)). For
larger thread diameters (from approx. 45 mm) the speed 35 rpm is selected by
pressing button I (19). Harder material or very coarse threads may require
earlier switchover to the speed 35 rpm (button I (19)).
REMS Unimat 77 has 4 speeds. In addition to the electric speed selection by
buttons I (19) and II (18) 2 other speeds are set by pushing or pulling the gear
shift lever (20):
8 rpm: gear shift lever pushed
+ button I diffi cult to cut materials 3 to 4"
16 rpm: gear shift lever pushed
+ button II normally cuttable materials 3 to 4"
diffi cult to cut materials 1¼ – 2½"
25 rpm: gear shift lever pulled
+ button I normally cuttable materials 1¼ – 2½"
diffi cult to cut materials up to 1"
50 rpm: gear shift lever pulled
+ button II normally cuttable materials up to 1"
4.5. Clamping the material
Close the holders with the closing lever (Fig. 2 (1)), move the universal automatic
die head to the right end position by turning the start cutting lever (Fig. 4 (17)),
set the thread length (see 4.2. and 4.3.).
Mechanical vice:
Insert the material carefully until it is touching the chase dies. The material is
clamped self-centring with the clamping lever (Fig. 4 (23)).
Pneumatic vice:
Set the pneumatic vice to the diameter to be clamped as follows: Loosen the
clamping screw (Fig. 12 (27)). Open the vice with the clamping lever (23). Move
forward the pneumatically operated die (33) by pressing the foot switch. Push
the adjusting plate provided (31) between the pneumatically operated die (33)
and its die body (32). Open the pneumatically operated die by pressing the foot
switch again. Insert the material to be clamped. Close the vice manually with
the clamping lever (23) (hand tight) until the dies are touching the material.
Tighten the clamping screw (27). Press the foot switch, remove the adjusting
plate. Insert the material carefully until it is touching the chase dies. Clamp the
material tight by pressing the foot switch.
The adjusting plate must be inserted if required when manual clamping is
necessary with the pneumatic vice otherwise the thread is not cut in centre.
To clamp plastic tubes or thin-walled metal pipes it may be necessary to reduce
the working pressure of the compressed air to avoid unround tension.
4.6. Work process
Close the protective cover (Fig. 4 (21)). Switch on the machine (see 4.4. for
speed selection), start cutting thread by moving the start cutting lever (17) in
counterclockwise direction. The feed becomes automatic after 2 or 3 thread
turns have been cut. On reaching the set thread length, the closing lever (1)
hits the trigger cam (Fig. 11 (2)) and the chase dies open automatically. Move
the gear unit clockwise by pressing the start cutting lever (17). Turn the start
cutting lever completely to the right past the spring loaded end position with
the machine running so that the universal automatic die head closes again.
Now switch off the machine by pressing the button (Fig. 4 (22)) and remove
the material.
With Unimat 75 long threads up to Ø 30 mm can be cut. Set the length stop to
max. length if necessary (see 4.3). The material is fed through the gearbox and
the motor (hollow shaft). Before the closing lever opens the universal automatic
die head, switch off the machine, open the vice, move the universal automatic
die head with material to the right end position with the start cutting lever (17)
but not past the spring loaded end position. Close the vice again, switch the
machine back on. You can repeat this process as often as you like.
4.7. Special clamping devices
Special dies Ø 6 – 42 mm are available for cutting threads on short bolts (Fig.
13).
REMS Nippelfi x, the automatic inside clamping nipple holders in 9 sizes from
½ to 4" are used for cutting nipples. Make sure that the pipe ends are deburred
on the inside, the pipe sections are always pushed onto the nipple holder up
to the stop and that no shorter nipples are cut than the standard allows. Do the
setting work and work process the same as described in 4.1. to 4.6.
WARNING WARNING
Wear gloves to pull nipples off the nipple holder to avoid getting cuts
from the thread!
4.8. Diffi cult to cut materials
HSS chase dies must be used to cut threads on high strength materials (from
approx. 500 N/mm²) and on stainless steel (Inox).
4.9. Thread cutting on concrete ribbed steel
Chase dies with an additional cut (model „RHSSZ") must be used for this. The
concrete ribbed steel can be clamped with both manual and pneumatic vices.
The unround cross-section of the concrete ribbed steel must be inserted into
the manual vice so that the small diameter is horizontal. With the pneumatic
vice, make sure that the concrete ribbed steel is always clamped as the vice
was set, i.e. if the setting was made horizontally with a small diameter, the
concrete ribbed steel must always be inserted in the same position because
otherwise the clamping distance of the pneumatic vice is not suffi cient to clamp
the material safely.
If material is diffi cult to cut, select speed 35 rpm (button I), use REMS Spezial
thread cutting material. The cutting starting process lasts longer than with
normal materials. Maintain the cutting start pressure until 2 to 3 thread turns
are cut and the further in-feed takes place automatically.
4.10. Chamfering/peeling dies
A chamfering/peeling die head 45°, Ø 7 – 62 mm, with chamfering/peeling dies
45°, Ø 7 – 62 mm, with holders is offered as an accessory for REMS Unimat
75. This can be used to chamfer pipes and bars at the ends with an angle of
45° at the outer diameter. Other angles can be ground onto the chamfering/
peeling dies by the user. The diameter at the end of a bar can also be reduced
with the chamfering/peeling dies, i.e. a point can be turned. If the chamfering/
peeling dies with holders are to be installed in a thread die head, the closing
lever (Fig. 2 (1)) must be replaced by the collared bolt for chamfering/peeling
dies (accessory, Art. No. 751101). See 3.2. Mounting (changing) the closing
lever.
The chip depth for peeling is a max. 7 mm. The lowest engagement depth is
approx. 0.35 mm in the diameter according to a number of the adjusting spindle
(Fig. 2 (10)) on the universal automatic die head. See 5.3 for setting the cham-
fering/peeling dies. Feeding must take place manually during the whole process
for chamfering and peeling.
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pneumatic
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