NARGESA NF70 User manual

INSTRUCTIONS BOOK
PRADA NARGESA, S.L
Ctra. de Garrigàs a Sant Miquel s/n · 17476 Palau de Santa Eulàlia (Girona) SPAIN
Tel. [phone] · [email protected] · www.nargesa.com
END WROUGHT IRON MACHINE
NF70

Thank you for choosing our machines
www.nargesa.com

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INDEX
1. CHARACTERISTICS OF THE MACHINE ...............................................................................
1.1. General dimensions ....................................................................................................
1.2. Description of the machine ..........................................................................................
1.3. Identification of the machine .......................................................................................
1.4. General features .........................................................................................................
1.5. Identification of safety protection devices ...................................................................
2. TRANSPORTATION AND STORAGE ...................................................................................
2.1. Transportation .............................................................................................................
2.2. Storage conditions ..……………..................................................................................
3. MAINTENANCE AND CLEANING ..........................................................................................
3.1. General maintenance ..................................................................................................
3.2. Cleaning ......................................................................................................................
4. INSTALLMENT AND STARTING UP ......................................................................................
4.1. Location of the machine ..............................................................................................
4.2. Working site ......….......................................................................................................
4.3. Admissible outer conditions ......................................................................................
4.4. Electrical connections .................................................................................................
5. OPERATIONS ..........................................................................................................................
5.1. Description of control panel .........................................................................................
5.1.1. Description of keypad ....................................................................................
5.1.2. Screen messages ..........................................................................................
5.2. Language selection......................................................................................................
5.3. Initialisation of machine ……......................................................................................
5.4. Change of rollers .........................................................................................................
5.5. Manual operational mode ............................................................................................
5.6. Simple mode ……………………………………………………………….........................
5.7. Semi-automatic mode .................................................................................................
5.8. Unlocking the machine …………………………………………………………………….
5.9. Speed Adjustment ………............................................................................................
6. POSSIBLE FAULTS ................................................................................................................
7. WARNINGS ……......................................................................................................................
8. DESCRIPTION AND ASSEMBLY OF TOOLING ....................................................................
8.1. Points at the end extreme ...........................................................................................
8.1.1. Description of elements ...............................................................................
8.1.2. Working procedure .......…..............................................................................
8.2. Fish tail ends …...........................................................................................................
8.2.1. Description of elements .................................................................................
8.2.2. Working procedure .........................................................................................

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8.3. Marked on the middle part of the bar ..........................................................................
8.3.1. Flat marking ...................................................................................................
8.3.1.1. Description of elements ..................................................................
8.3.1.2. Working procedure ……....................................................................
8.3.2. Trilobular marking ..........................................................................................
8.3.2.1. Description of elements ....................................................................
8.3.2.2. Working procedure ……………..........................................................
9.TOOLING ..................................................................................................................................
9.1. Standard tooling ..........................................................................................................
9.2. Optional tooling ...........................................................................................................
TECHNICAL ANNEX
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1. CHARACTERISTICS OF THE MACHINE
1.1. General dimensions
1.2. Description of the machine
The purpose of the machine NF70 NARGESA is to shape up hot metal (forging) to the desired shape by
mechanical deformation.
The final result of the part is given by the different forming rollers.
NOTE:
Any application other than the one specified on this book and for which this machione has been
designed can cause damage to the machine or the user, in this case the manufacturer does not
hold any responsibility

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1.3. Identification of the machine
Control panel Back guides and
stops
Rollers area
Activating pedal
Working site

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1.4. General features
- Electric motor 5.5 KW power (7.5 HP) to 1460 r.p.m.
- Tension Power 230 or 400 V three-phase
- Electrical consumption 22/12 A
- Working speed 20 rpm at 50 Hz
- Weight 450 Kg
- Maximum capacity Mild steel square of 20x20mm
Mild steel flat bar of 40x10mm
1.5. Identification of safety protection devices
Protection for rollers
Lower front protection
Collector drawer
Back cover
It is ABSOLUTELY FORBIDDEN to work without safety devices of the machine. They will be only
cancelled during breakdowns (if necessary) and always with the machine stopped.

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2. TRANSPORTATION AND STORAGE
2.1. Transportation
Transportation of the machine is made by a forklift or by shovel, by using the clamping point of the lower
base machine (designed for this purpose).
Risk of overturning the machine must be kept in mind.
2.2. Storage conditions
* Relative humidity between 30% and 95% non-condensing.
* Temperature 15 º C and 55 º C.
* Do not stack anything on the machine.
* Do not disassemble the machine for storage.

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3. MAINTENANCE AND CLEANING
3.1. General maintenance
The NF70 NARGESA forging machine has been conceived and designed to be almost maintenance free.
The only point to note regarding maintenance is the level of lubricant of the gearbox. This level may be ob-
served through the inspection peephole (1) visible in the side of the case, once the rear protection has
been disassembled.
In the event that the level is low, fill it up with oil SAE 80-140 by the filler hole (2) until oil is visible through
the peephole (1) (about half of the sight glass). A review of this parameter must be carried out at least once
every 3 months.
3.2. Cleaning
The machine NARGESA NF70 is designed to work with hot material (forged), which involves a large
amount of slag, chaff, etc is generated. during regular work. For the operator’s comfort, the NF70 has a
collector drawer at the bottom of the working area, wherein said slag falls, so it is advisable to periodically
empty it.
Collector drawer

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4. INSTALLMENT AND STARTINGUP
4.1. Location of the machine
The NF70 NARGESA machine will be positioned on a flat surface so it can be leveled. If desired, it can be
clamped to the ground through the holes made in the base for this purpose.
4.2. Working site
To use the forging machine NARGESA NF70 is essential to have enough space to work on the side of it
and also have access to the back to carry out the maintenance of the machine.

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4.3. Admissible outer conditions
The working conditions of the machine NF70 NARGESA ranges between +5 º C and +50 º C and the maxi-
mum continuous temperature +45 ° C (24 hours)
The condition of humidity ranges between 30% and 90% non-condensing.
4.4. Electric connections
The machine NARGESA NF70 is designed to be connected to an outlet of a three-phase 230 or 400V
50/60Hz
Star shape
(preset)
For tension 400V
Triangular shape
For tension 230V
TENSION DRIVE TYPE
230 V SV0551G5A-2
400 V SV0551G5A-4
NOTE: If voltage changes it will be necessary proceed to drive change, according
to the following table.

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5. OPERATIONS
The forging machine NARGESA NF70 has got 2 working modes:
- Manual mode
- Simple mode
- Semi-automatic mode
Before explaining the modes, we’ll explain the different components and features of the forging machine
NARGESA NF70
5.1. Description of control panel
On the side of the forging machine NF70 NARGESA there is the control panel where the user can identify
where the various controls of the machine are located. These controls are located in the following figure.
5.1.1. Description of keypad
The functions for each key are detailed below:
+ Key allows us to increase the number of cycles in semi-automatic mode.
- Key allows us to decrease the number of cycles in semi-automatic mode.
→] Key allows us to access the menu to set the number of cycles in semi-automatic mode.
ESC key allows us to interrupt the programming process that we are currently running.
Reverse key allows us to turn the rollers in the reverse direction (only during initiation).
Forward key allows use to turn the rollers in the forward direction (only during initiation).
Simple mode key allows us to access simple mode.
Counter key allows us to clear the counter displayed on screen.
Numeric keys allows us to access the semi-automatic mode in each of the 8 memory slots.
Drive potentiometer regulates the speed of the machine
Safety devices reset button
Tension flashing
light
Drive potentiometer
Sound warning
Morning switch
Screen
Emergency stop
Alarm flashing
light
Reset button
Keypad

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SELECCIÓN IDIOMA
ESPAÑOL
INICIALIZANDO
MEMORIAS...
ESCAPE FOR
STARTING
PUSH AND RELEASE
THE FOOT SWITCH
NF70
STARTING
NF70
MANUAL MODE
5.1.2. Screen messages
During operation of the machine NARGESA NF70, there will be appearing different messages on the
display. We detail here a brief explanation of their meaning:
This is a language selection message. Use numeric keys 1 to 5 to select the language of the messages
displayed on screen.
It will note that the memories are being restarted after the language is changed.
You must press the ESC key to start the machine.
Press the pedal in order to continue.
The machine is running the initiation cycle.
Manual mode message for NF70. This is the default operating mode.

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>>>> SIMPLE MODE
COUNTER: 00000
Define N. Cycles
001
M1 CYCLES: 001
PIECES: 00000
STOP OF
EMERGENCY
NF70 simple mode message. The counter increases each time the pedal is pressed.
Indicates the number of cycles in semi-automatic mode. We can increase and decrease the number of cy-
cles to run using the + and - keys.
Message in semi-automatic mode on one of the eight available memory slots. The number of parts is in-
creased each time the cycles specified on the screen are completed.
One or both of the two emergency stop buttons have been pressed.

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SELECCIÓN IDIOMA
ESPAÑOL
STOP OF
EMERGENCY
ESCAPE FOR
STARTING
5.2. Language selection
The NARGESA NF70 machine has been set up to display messages on the screen in various languages.
To change the language, continue with the following procedure:
- Check that the main power switch is in position 0 (OFF).
- Hold down the + key and turn the power switch to position 1 (ON)
- The following message will be displayed on the screen:
- Use the number keys to select the required language. 1 (Spanish), 2 (English), 3 (French), 4 (Italian) or 5
(Polish).
- Press the - key to confirm the changes.
5.3. Initialisation of machine
The NF70 machine needs to be started before operations can begin. The machine should be initiated to
ensure that the rollers reach the resting positions so that they can be changed, and also to allow material to
be input with the maximum opening.
The procedure to follow is described below:
- Firstly connect the machine to the power socket and make sure that the main switch is in position 0.
- Check that there are no foreign bodies in the roller area (material, loose rollers, etc.).
- Turn the main switch to position I.
- Pull out the emergency stop buttons (if they have been pressed).
- The following message will be displayed on the screen:
- Press the blue reset button. The red light will turn off and the message on the screen will change to:

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NF70
MANUAL MODE
PUSH AND RELEASE
THE FOOT SWITCH
- Press the ESC key and the message on the screen will change again:
- Press and release the pedal. The NF70 machine looks for the initiation point and switches to manual mo-
de by default.
- The machine stops when the rollers reach the resting position (maximum opening between them).
- Check that the upper roller rotates counter-clockwise. If this is not the case, then you must contact the
Nargesa Technical Service.
Initiation position and rotation direction
5.4. Change of rollers
As the NARGESA NF70 machine works under mechanical strain and this deformation is done using rollers,
the general process to change the rollers is explained below, as this is a common procedure for all.
The machine must be in its starting position in order to change the rollers, otherwise we will have problems
when removing them. If the rollers are not in this position, an initiation cycle must be run (see section 5.3).

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- Press emergency stop.
- We place main switch in position 0
- We loose the screws marked with Nr 1.
- Remove protection on rollers Nr 2
- Aflojamos los 4 tornillos marcados con el Nr 3.
- Turn parts marked with Nr 4 so in order to set parts Nr 5 free.
- Extract parts marked with Nr 5. Keep in mind the position of these parts since they will have to be set in
the same position again.
- We’ll take out thicks Nr 6, looking after their shape and position.
- We can take out rollers Nr 7.
In order to proceed with assembling it must be done inversely, focussing on the position of parts Nr 6 and
Nr 5, fastening well screws Nr3.
5.5. Manual operational mode
The machine needs to be initiated as detailed in section 5.3 before operations in manual mode are started.
Manual mode is the machine default operational mode. In this mode, the machine starts to run continuously
at a speed set by the potentiometer while we keep pressing the pedal. When the pedal is released, the ma-
chine will continue to run until it returns to the starting point, but it will do so at the St3 predefined speed
(60Hz).
5.6. Simple mode
The machine needs to be initiated as detailed in section 5.3 before operations in simple mode are started.
Press the key with the hand icon to access simple mode. In this operational mode the machine starts to run
whenever the pedal is pressed. The working speed is fixed by the potentiometer. When the pedal is re-
leased, the machine stops automatically. The screen displays the number of times that the pedal has been
pressed. Press the counter key twice to clear the counter.

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ESCAPE FOR
STARTING
!!PRECAUTION
PIECE IN MACHINE!!
M1 CYCLES: 004
PIECES: 00000
5.7. Semi-automatic mode
The machine needs to be initiated as detailed in section 5.3 before operations in semi-automatic mode are
started. The semi-automatic mode allows us to indicate the specific number of turns or cycles that we want
the machine to do. Once complete, the machine will stop and will emit an audible signal. We must remem-
ber that we have to keep pressing the pedal to activate the machine. To programme the number of turns,
press the →] key and access the menu to define the cycles using the + and - keys. Then, assign the num-
ber of defined cycles to one of the 8 existing memory slots by pressing a number key (1 to 8).
The Screen will display a message similar to the one shown below:
Message indicating the we have programmed 4 turns or cycles.
5.8. Unlocking the machine
Due to external causes of the machine, it can be locked, that is to say, the rollers have stopped half cycle
and the bar of material has kept in between. This may be due to a lack of heat of the material, inadequate
material etc.. The steps to follow in order to unlock the machine are:
- Press the emergency stop button.
- Unlock the emergency stop button and press the reset button so that the following message appears:
or
Now, by pressing the forward and reverse keys we can make the rollers turn at very low speeds to unlock
the machine.
This is an emergency situation and care should be taken to avoid injury.
After making an operation of unblocking it will be necessary to startup the machine just as it is described in
section 5.3.
5.9. Speed Adjustment
The adjustment speed depends on the load, taking into account that, at maximum load the machine should
work at 50 Hz. The working range is 30 Hz to 60 Hz.

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6. POSSIBLE FAULTS
Due to normal use of the forging machine NARGESA NF70 abnormal situations could arise, we’ll try to
describe some below in order to facilitate the use and repair of it.
These anomalies are reflected in the display of the control.
Fault Cause Solution
Thermal of motor Motor overload mainly due to a material
without the correct temperature Heat up material up to 800ºC
The rollers do not turn
Fuse F1 at 24 VDC has tripped
Replace F1 fuse with a new one and
check that the white light on the
control box is turned on.
There is a problem with the pedal. Check the pedal and replace it if
necessary.
The machine does not
initiate properly.
The initiation inductive switch does not
detect it.
Adjust the position of the inductive
switch and check that it works well.
If the problem goes on, please contact our technical assistance in Nargesa
[phone] [phone] [e-mail] sat2.nargesa

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7. WARNINGS
- Do not handle any part of the machine while it is running.
- Do not use the machine for any other purposes but the ones described in this manual.
- Use gloves when handling the machine components and during the working processes.
- Wear safety gloogles and homologated protective boots.
- Hold the base material.
- Do not work without the protections devices the machine is equipped with.
- There exist the risk of burns because the base material is at high temperatures.
In case of accident by negligence of the operator, not to follow the safety and operating standards
set out in this manual, PRADA NARGESA SL will not take any responsibility.