REMS Unimat 75 Instrucciones De Uso página 14

GBR
the die head. Before installing the new die set, starting with holder No. 1,
place the closing lever in the down position (install holders in the sequence
1, 2, 4, 3).
4. Operation
4.1. Right-hand / left-hand thread
Ensure that the correct closing lever and the stop screw is correctly in-
serted for the selected die set (see 3.2.) and that the direction of rotation
of the die head is correctly set at the reversing switch (5) (Fig. 3) (see 2.2.).
4.2. Setting the thread diameter
The required thread diameter is set at the setting spindle (10) (Fig. 2) using
the square-section spanner (9) (Fig. 5). Rough setting is achieved by adjus-
ting the setting spindle until the appropriate mark on holder No. 1 (window
in die head (11)) is aligned with the mark on the die head. Fine setting is
achieved with the aid of the fine setting tabler provided with each machine
and stating a setting number of the setting spindle for each thread diameter.
This setting number must be aligned with the mark (12) provided above
the setting spindle on the die head. For left-hand threads, the mark on the
opposite side (13) applies. Great care must be taken that during the set-
ting operation the closing lever (1) is against the stop screw (3), i.e. that
the die head is closed. If die sets otherthan those supplied with the
machine are used, the setting number must be determined by the user
himself with a plug or socket thread gauge or a sample thread.
4.3. Setting the length stop
The required thread length is set at the length stop (14) (Fig. 4). To do so,
release clamping lever (15) and set the length using the scale (16). If ne-
cessary, move the transmission unit with the die lever (17) to the left. With
a tapered pipe thread, the standard thread length is achieved automati-
cally when the length stop is set to the required thread size using the
scale (16).
See 4.6. for long thread.
4.4. Selecting the speed
REMS Unimat 75 has 2 speeds. For smaller thread diameters (up to ap-
prox. 45 mm), the speed 70 rpm is selected by pressing the button II (18)
(Fig. 4). For higher thread diameters (above 45 mm), the speed 35 rpm
is selected by pressing the button I (19). Harder stock or very coarse thread
may require an earlier changeover to 35 rpm.
REMS Unimat 77 has 4 speeds. In addition to the electrical speed selec-
tion using buttons I (19) and II (18), 2 further speeds are obtained by
pushing or pulling the gear shift lever (20):
8 rpm: gear shift lever pushed
+ button I hard-to-machine materials 3 to 4”
16 rpm: gear shift lever pushed + button II
normal-machined materials 3 to 4”
hard-to-machine materials 1
25 rpm: gear shift lever pulled + button I
normal-machined materials 1
hard-to-machine materials up to 1”
50 rpm: gear shift lever pulled + button II
normal-machined materials up to 1”
4.5. Chucking the stock
The closing lever (1) (Fig. 2) is closed.
Mechanical vice:
Carefully insert the stock right up against the chaser dies. The stock is
chucked in self-centering fashion using the chucking lever (23) (Fig. 4).
Pneumatic vice:
The pneumatic vice is set to the diameter to be chucked in the following
manner:
Loosen clamping screw (27). Open the vice with the chucking lever (23).
Press the pedal switch to advance the pneumatically operated chucking
jaws. Slide the supplied spacer plate between the pneumatically opera-
ted chucking jaw and its chucking jaw element. Retract the pneumatically
operated chucking jaw by releasing the pedal switch. Close the vice ma-
nually using the chucking lever (23) until the jaws are just in contact with
the stock. Tighten clamping screw (27). Operate the pedal switch and
”
1 / to 2 1 /
4 2
”
1 / – 2 1 /
4 2
remove the spacer plate. Now proceed as described for the mechanical
vice, chucking or unchucking the stock using the pedal switch.
4.6. Operating sequence
Close the safety cover (21). Switch on the machine (see 4.4 for speed se-
lection), start to cut the thread by operating the die lever (17) counter-
clockwise). Once 2 to 3 thread turns have been cut, feed is automatic.
Once the set thread length is reached, the closing lever (1) (Fig. 2) con-
tacts the triggering cam (2) (Fig. 4) and the dies open automatically. Move
the gear unit to the right by operating the die lever (17) clockwise. The die
head is closed again in the right-hand limit position. Now switch off the
machine (22) and remove the stock.
With Unimat 75, long threads up to 30 mm in diameter can be cut. Here,
the stock is passed through the gear unit and the motor (hollow shaft). Be-
fore the closing lever opens the die head, switch off the machine, open
the vice and move the die head (complete with workpiece) to the right-
hand starting position using the cutting lever (17). Now reclose the vice
and switch on the machine again. This procedure can be repeated as
often as required.
4.7. Special chucking means
For gentle chucking of bright-drawn round stock, round plastic bars etc.,
and for clamping of stud bolts and hexagonal screws, special clamping
jaws are available.
For nipple cutting, REMS Nippelfix is used, the automatic internally clam-
ping nipple chuck in 9 sizes from
the pipe ends are deburred on the inside, that the pipe sections are al-
ways pushed on as far as they can go, and that no nipples are cut which
are shorter than standard.
4.8. Hard-to-machine materials
For thread cutting on higher-strength materials (above approx. 500 N/mm
and on stainless steel, chaser dies made of HSS must be used.
5. Maintenance
Pull out the mains plug before any servicing or repair work. Such work
must be carried out only by experts and trained personnel.
5.1. Servicing
The REMS Unimat 75 and the REMS Unimat 77 are maintenance-free
at normal operation. The gear units have been provided with a permanent
oil or grease filling and require no further lubrication.
At heavy use, e.g. series production, the oil level of the REMS Unimat 75
gear has to be checked. Thereby loosen the screw plug with oil dip rod
(spare parts list Pos. 59), if necessary refill gear oil (Art.No. 091040 R1,0).
5.2. Inspection/maintenance
The container for the coolant must be cleaned at regular intervals. To do
so, drain off the coolant at the drain connection underneath the chip re-
moval pan.
If the closing lever – particularly without die set in the die head – can only
be moved with difficulty, the notice plate (24) (Fig. 2) on the die head must
be unscrewed. Dirt and chips can now be blown through – preferably using
compressed air. (Do not remove setting spindle (10)).
5.3. Sharpening of chaser dies
The best rake angle (Fig. 7) for general applications has been found to be
g = 20°. The supplied setting gauge has a notch, which, as Fig. 8 shows,
corresponds to the value 20°. For harder materials, it may be necessary
to increase the rake angle. On the other hand, it might be necessary to
reduce the value from to reduce the value of y when the chaser dies catch
(e.g. in thin-walled pipes, non-ferrous metals and plastics).
As a rule, the following empirical values apply:
Medium-strength steels (300–400 N/mm
stainless steel
High-strength steels
Non-ferrous metals
Plastics, e. g. rigid PVC (special die stock chaser)
For threads greater than 33 mm, an angle of 45° must be set on the die
stock chaser at the end of the clamping face (Fig. 7). This must be suffi-
cient to ensure that the die stock chaser does not project beyond the
sliding face (Fig. 10 (26)).
GBR
” to 4”. Care must be taken here that
1 /
2
2 ),
g = 20°
g = 20–25°
g = 10–20°
g = 0°
2 )