Magnet cup VM0 pages

Réf. : 304 134 02
ELECTROMAGNETIC GRIPPER
SCOPE
The VM Magnetic Grippers are highperformance
electromagnets equipped
with a concentric winding.
The VM electromagnets, which are
designed to handle thin sheet metals,
must be geometrically placed to limit
bendings in all directions. Depending on
sheet-metal sizes, the VM grippers will be
installed therefore on fixed or telescopic
lifting beams.
They are recommended for the handling
of sheet metals and metal parts in :
– oxyacetylene cutting workshops ;
– shipbuilding yards ;
– sheet-metal warehouses.
TECHNICAL DESCRIPTION
The VM grippers are made up of a
mechanically fitted-welded steel frame
protecting the aluminum or copper
winding. The main components are :
- a frame made of high magnetic permeability
steel. The mechanical fittings and
support surfaces are machined for a
better reconditioning of the magnets ;
– a suspension ring ;
– a concentric winding with reinforced
insulation ;
– a wear plate made of non-magnetic
manganese steel. This high-strength
part is flanged and welded to the frame ;
– a fill-in resin blocking and insulating the
coil in the frame (H or C class
depending on usage) ;
– an electric box allowing external connection
while protecting the internal
winding.
INSTALLATION MODALITIES
The VMs can be installed on any lifting
device (overhead crane, truck crane,
gantry crane, etc.). They are designed for
individual usage and are suspended by
the suspension ring.
The electrical connection is made using a
cable with 3 large-section conductors
externally protected to provide a 110 VDC
power supply.
For complete sheet metals, the VMS are
secured by elastic connections (chains,
springs, etc.) to a fixed or telescopic
lifting beam. An overall study is then
necessary to define the handling tool.
SPECIFICATIONS
Performances vary according to various
parameters :
– characteristics of the ferromagnetic elements
to be lifted ;
– temperature of the products ;
– load thickness ;
– clearance between the support side
and the load.
The effect of the load's thickness and
clearance on lifting capacity is detailed in
the curves on the reverse side.
Two VM gripper types are offered according
to their diameter :
255 et 340 mm.
ADDED FEATURES
– Frame extremely resistant to shocks
and wear ;
– Magnetic circuit protection against
external particles and moisture ;
– Duty cycle : 50 % to 75 % depending
on usage ;
– Lifting capacity : light weight and
compact.
ELECTRIC EQUIPMENT
The VMs receive three types of electric
equipment depending on usage :
– power connector installed on the
frame ;
– sealed terminal box ;
– rectifier unit + switch for a 220 VAC
single-phase power supply.
USAGE MODE
No special servicing or maintenance is
required except for a periodic check of
the electrical connections, suspension
links and frame.
VM ON LIFTING BEAM
Lifting beams equipped with VM 255 or
VM 340 grippers have the following
qualities : because of the large number of
suspension points, booms are minimum.
The grippers are adapted to different
sized sheet-metals by selection switches.
Each gripper is equipped with a balancing
spring suspension system.
LIFTING
VM