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Hydraulic Press is a machine in which a large force is exerted on
the larger of two pistons in a pair of hydraulically coupled cylinders
by means of a relatively small force applied to the smaller piston.
They display superior performance through innovative ideas. The
hydraulic presses range from 5 Tons to 5000 Tons capacity.
Operation Modes
The hydraulic presses have specific operation modes :
¤ Fully Automatic 'PLC'-Controlled
¤ Contractors/ Relay based
Frame Structures
The frame structures of these presses are:
¤ 'H' TYPE OR fabricated 4-column type
¤ 'C' type
¤ 4-pillars (Hard chrome pillars type)
Applications
The hydraulic presses have exclusive applications in the following
spheres:
Deep drawing operations
Blanking and Punching
Riveting, Stamping and Pressing
Powder Compacting
Other applications like: FRP, SMC, DMC, Rubber Plastics etc.
Salient Features of hydraulic
presses:
- These presses provide fast approach
slow pressing & fast return speeds. The change in speed can
be manually preset to take place at any point of the stroke with
the help of limit switches / proximity switches.
- The frame is fabricated by ultrasonically
tested quality profiles & plates of suitable thickness to
with stand the load & longer life of the press. The frames
are stress-relieved.
- Maximum frame rigidity is achieved
through computer aided frame design & finite element analysis.
- Extra long, precision machined
& hardened guides to face slides offer exceptional accuracy
& alignment which further reduced to wear.
- In blanking or punching hydraulic
presses a damping system can be fitted. This effectively reduces
breakthrough noise & tool wear normally generated by such
operations.
- The low noise hydraulic power
pack unit is designed as per international practices & assembled
with internationally reputed make components. The presses are
designed as per ISI guidelines, hence standard seals, bushes are
used.
- "Programmable logical controls"
(PLC) is provided in our presses of international standard make
i.e. ABB/Allen-Bradley/Siemens/Telemacqnice / keyance, offering
maximum production flexibility & Full compatibility with international
standards.
- Precise machining of the structural
members is done after normalising to get the required accuracies
like parallelism between platen & bed & right angularity
between bed and the moving platen.
- Lubrication: Ram slides / guides/
guide bushes are lubricated from a centralised lubrication arrangement.
- Moving platen: It is a fabricated,
heavy duty, tested welded plate construction for highest stiffness
under heavy loads. The whole platen is stress-relieved after welding.
'T' slots provided in the platen are as per DIN standards. Hydraulic
or mechanical ejector pins to operate from inside the ram is also
provided as optional on request or depending on the application.
- Die transfer rails or bolster
sliding arrangement is also provided as optional in front side
of the press for heavy tools applications.
Types:
C frame type presses:
1. These presses offers maximum access to tool area for tool changing
& component feeding aplications.
2. Range : 5 Tons to 300 Tons capacity.
3. Slides guidance can be either twin
pillars type or face slides.
4. Hydraulic power pack is inbuilt
& all valves are manifold mounted for easy & quick maintenance
& a pressure relief valve protects against overloading of the
press.
5. Additional equipments:
a. Ejectors in either the slide or under the press bed.
b. Die cushioning arrangement for deep drawing.
Hard chrome pillars type presses:
The guidance of this press offers excellent slide accuracy
of the moving ram. Platen, resulting in reduced tool wear &
an increased tool life.
Slide move on larger
size phosphorous bronze / ultra bronze bearing mounted at each corner
with suitable lubrication arrangement a proper sealing arrangement
at both side of each bush is also provided.
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