Enerpac MTR-50 Manual De Instrucciones página 2

Operational sequence
B-
A-
C-
D-
0
Hydraulic
scheme
B A
PA
VR
S1 S2
EV1
The sequence of operations is divided into three distinct
phases;
- Extension of the plunger;
- Rotation of the arm (the rotation occurs on the table);
- Retraction of the plunger "CLAMPING THE DIE" see
drawings 2 and 3.
Operational Sequence
PHASE 0-RETRACTED: The Cylinder is deactivated with
the plunger retracted. The arm is under the die loading
table.
PHASE 1 FULLY EXTENDED: Supplying pressure to port
"A", plunger makes it complete a full straight stroke. The
stroke end is indicated by pressure switch PA.
PHASE 2-ROTATION: Pressure switch PA activates
solenoid S3 or S4 - it's up to the operator to choose - of
the EV2 valve which pressurizes port C or D, forcing an arm
rotation of 90° clockwise or counterclockwise, depending
on which port is pressurized (C = clockwise, D = counter-
clockwise). Proximity switch FC1 or FC2 indicates correct
rotation and forces EV1 to pressurize port "B".
PHASE 3-CLAMPING: Pressure in "B" causes the arm to
lower and clamp the die, which is then signaled by the PB
pressure switch which deactivates EV1. The pressure in the
circuit is maintained by the VR valve. Any drops in pressure
are corrected by the PB pressure switch.
PHASE 4-UNCLAMPING: When pressure enters port "A"
the VR valve unclamps and the stem makes a complete
stroke, consequently unclamping the die, which is signaled
by the PA pressure switch.
PHASE 5-ROTATION: Thanks to PA action on EV2,
pressure is built up on port D or C which causes the arm to
rotate 90° in opposite direction taken in Phase 2.
B-
B-
A-
A+
C- C-
D+
D-
1 2
C D
PB
FC1 FC1
S3 S4
EV2
illustration 3
B+
B-
A-
A+
C-
C-
D-(+)
D+(-)
3 4
Completed rotation is signaled by proximity micro switch
FC2 or FC1.
PHASE 6-RETURN: The micro switch signal activates the
EV1 el-valve that pressurized port "B", causing the arm to
retract under the machine table. The PB pressure switch
brings the cycle to an end.
- The rotation cam is extended and emerges from the
cylinder body. The cam has 2 screws that activate 2
proximity inductive micro switches that signal the
completed rotation of the cam "Arm" and trigger the next
cycle. See drawing 4 on page 19.
4.1 The arm may be positioned on an arc of 360 °
ATTENTION: Tighten the item 22 set screw well.
It's best to align the reference notches of the
arm with those on the cylinder body.
5 APPLICATIONS
Clamping occurs with the cylinder in traction
ATTENTION: During extension and rotation,
make sure that the arm does not encounter
mechanical obstructions.
5.1 Comply with the recommended torque values for the
assembly screws.
5.2 Check the pressure and capacity of the hydraulic
circuit. NEVER exceed the recommended values.
6 INSTALLATION
IMPORTANT: It is mandatory that the operator
has a full understanding of all instructions,
safety regulations, cautions and warnings,
before starting to operate any of this high force
tool equipment. In case of doubt, contact
ENERPAC.
6.1 The ENERPAC Three-position Swing Cylinders are
hydraulically powered. Check your particular circuit's
characteristic features and pay close attention to the oil
pressure and capacity.
2
B- B+(-)
A- A-
C+
C-
D- D-
5 6
illustration 2