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Series
F9.426

Automatic coupling system

for single and double acting cylinders, ND 4
max. operating pressure 500 bar
Automatic coupling system
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Catalogue sheet
Operating instructions
Information Series
Description
F 9.426 Automatic coupling system

General information
Efficiency of flexible manufacturing systems and quality of workpieces are increased by hydraulically-operated fixtures which can be automatically connected to and disconnected from the power source.
Coupling systems which were designed for that purpose can be used in combination with changing pallets for single and double-acting elements and also for several clamping circuits with a max. operating pressure of 500 bar. Retrofitting is possible.
Clamped fixtures which are disconnected from the power unit can be monitored from time to time by a control cylinder in connection with signal switches or continuously by infra-red pressure monitoring.

Description
Each coupling system consists of a coupling unit and the corresponding coupling nipple unit.According to the application, several components can be added to the coupling system that meet different safety requirements.

Design
The coupling unit contains the real coupling element which is integrated in the coupling piston. The coupling piston extends or retracts for coupling and uncoupling, respectively. The front of the coupling element is flat and therefore allows easy cleaning. At each standard version the uncoupled position of the coupling piston can be controlled by inductive proximity switches or by electro-pneumatic differential pressure switches, depending on the corresponding version. For controlling the coupled mode, a second switch is required. At the pressure side of the coupling nipple unit a non-return valve is installed and at the pressureless side a double 
check valve with a pre-tension of 6 bar is installed. This double check valve works only in uncoupled mode and prevents the pressure to increase in the return line, if there is an internal leakage in the clamping system. The insertion nipples in the nipple unit allow a radial misalignment adjustment of ±O.5 mm and an axial misalignment adjustment of ±1 mm.

Function (double acting)
Positioning of the coupling nipple unit is made by lateral insertion into the T-slot-type claw of the coupling unit. 
When port A1 and A2 are pressurised, the coupling pistons extend. After the coupling pistons are extended, the check valves in the coupling nipple unit and the coupling piston are opened. Both check valves can be opened against system pressure. Oil supply is made through port A and B. To disengage coupling ports B1 and B2 are pressurised. The proximity switches register the retracted position of the coupling positions. Due to safety reasons the coupling unit is operated by means of a so-called differential system, i.e. port B1 and B 2 are not controlled by a valve and are directly connected to the pump.

Products (8)
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max. operating pressure [bar]
500 (8)
component
nominal diameter [mm]
4 (8)
application for
position monitoring
Item no. CAD datamax. operating pressure [bar]componentnominal diameter [mm]application for
Item no.
CAD data
max. operating pressure [bar]
500
component
coupling unit
nominal diameter [mm]
4
application for
for single-acting elements
Properties
Item no.
CAD data
max. operating pressure [bar]
500
component
coupling unit
nominal diameter [mm]
4
application for
for single-acting elements
Properties
Item no.
CAD data
/
max. operating pressure [bar]
500
component
coupling unit
nominal diameter [mm]
4
application for
for single-acting elements
Properties
Item no.
CAD data
max. operating pressure [bar]
500
component
coupling nipple unit
nominal diameter [mm]
4
application for
for single-acting elements
Properties
Item no.
CAD data
max. operating pressure [bar]
500
component
coupling unit
nominal diameter [mm]
4
application for
for double-acting elements
Properties
Item no.
CAD data
max. operating pressure [bar]
500
component
coupling unit
nominal diameter [mm]
4
application for
for double-acting elements
Properties
Item no.
CAD data
max. operating pressure [bar]
500
component
coupling unit
nominal diameter [mm]
4
application for
for double-acting elements
Properties
Item no.
CAD data
max. operating pressure [bar]
500
component
coupling nipple unit
nominal diameter [mm]
4
application for
for double-acting elements
Properties
Loading…
Item no.
max. operating pressure [bar]
500
component
coupling unit
nominal diameter [mm]
4
application for
for single-acting elements
position monitoring
without
Item no.
max. operating pressure [bar]
500
component
coupling unit
nominal diameter [mm]
4
application for
for single-acting elements
position monitoring
inductive
Item no.
max. operating pressure [bar]
500
component
coupling unit
nominal diameter [mm]
4
application for
for single-acting elements
position monitoring
pneumatic
Item no.
max. operating pressure [bar]
500
component
coupling nipple unit
nominal diameter [mm]
4
application for
for single-acting elements
position monitoring
without
Item no.
max. operating pressure [bar]
500
component
coupling unit
nominal diameter [mm]
4
application for
for double-acting elements
position monitoring
without
Item no.
max. operating pressure [bar]
500
component
coupling unit
nominal diameter [mm]
4
application for
for double-acting elements
position monitoring
inductive
Item no.
max. operating pressure [bar]
500
component
coupling unit
nominal diameter [mm]
4
application for
for double-acting elements
position monitoring
pneumatic
Item no.
max. operating pressure [bar]
500
component
coupling nipple unit
nominal diameter [mm]
4
application for
for double-acting elements
position monitoring
without
Accessories (14)
Item no. CAD data Description
Item no.
CAD data
Description
Insertion nipple for double-acting elements as per data sheet F9.426
Item no.
CAD data
Description
Insertion nipple for single-acting elements as per data sheet F9.426
Item no.
CAD data
Description
Subassembly control cylinder as per data sheet F9.426
Item no.
CAD data
Description
Subassembly limit switch as per data sheet F9.426
Item no.
CAD data
Description
High-pressure shut-off valve ND6 ports G1/4 max. 500 bar, as per data sheet C2.940
Item no.
CAD data
Description
Inductive proximity switch M8x1 mm type A, standard as per data sheet B1.552
Item no.
CAD data
Description
Connecting cable with straight pnp plug M12 without LED, cable length 3m as per data sheet G2.140
Item no.
CAD data
/
Description
Power unit single-acting elements as per data sheet F9.426
Item no.
CAD data
/
Description
Power unit double-acting elements as per data sheet F9.426
Item no.
CAD data
Description
Hydraulic accumulator 75 ccm gas preload pressure: 100 bar port: G1/4 interior thread max. 500 bar, as per data sheet F9.601
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Application examples

Automatic coupling system for double-acting clamping elements
With control cylinder for pressure monitoring of uncoupled clamping fixtures. Each clamping fixture is allocated to a loading and unloading station with coupling system. The coupling nipple unit is integrated into the fixture body with a minimum use of space.
The maximum operating pressure is approx. 300 bar. This pressure can be controlled at the control cylinder (adjustment range 90-500, hysteresis approx. 15%). 28 fixture pallets are used on 8 machining centres. The clamping pressure is maintained statically after pressurising i.e. during machining of the workpiece there is no connection to the pressure generator.