Products for the Machine Tool Industry
Haskel offers a range of air operated liquid pumps which are extensively
used for many applications in the machine tool industry. Major advantages
such as problem-free intermittent operation and the ability to hold high
pressures without consuming energy are coupled with compact size. These
critical requirements have lead design engineers to select these pumps
to solve their problems. Our technical sales support team are ready to
help size the Haskel pump to meet your requirement. Some typical applications
are show on overleaf.
Key Features
- Ability to stall at any predetermined pressure and hold this fixed
pressure indefinitely without consuming power or generating heat
- No heat, flame or spark risk
- Infinitely variable cycling speed and output
- Easy to apply automatic controls
- No limit or adverse effect to continuous stop-start applications
- Reliable, easy to maintain, compact and robust
- Smaller reservoir required due to no heat generation from air driven
pump
Typical Applications
Vertical Milling and Boring Machine Counter Balances
These machines are fitted with counter weights to position and counter
balance the machine head. One of the most effective counter balance systems
is to use an air driven hydraulic pump and accumulator. The system is
automatic with the pump starting to cycle if there is a pressure drop
in the accumulator. This allows the general system pressure to to be run
from the main electro-hydraulic pump system and the higher pressure hydraulics
required by the counter balance to be provided by the compact air driven
pump.
Roller Tensioning
The ease with which the Haskel pump outlet can be adjusted ensures precise
roller tension and squeeze pressure.
Hydraulic Actuation of Cylinders
The hydraulic cylinder on a wide range of presses such as filter, rubber
curing, metal forming, plastic moulding, etc. requires a hydraulic power
pack to advance and hold the pressure stroke. A Haskel air driven pump
is ideal for stroking the cylinder and maintaining the required load indefinitely
without consuming power.
Mechanical Press Safety Overload
To prevent overload damage to both press and die sets a safety feature
is to incorporate an oil-filled cylinder into the lower die housing. The
pressure in the cylinder is maintained at slightly over the press tonnage
rating by a Haskel pump. Should an overload problem occur, the pressure
in the cylinder is relieved through a safety valve. The pump will maintain
the pressure indefinitely without consuming power and will only cycle
again if if a pressure drop has occurred in the cylinder.
High Performance Drilling (Gun Drilling)
Drills for deep hole drilling have oil coolant pumped through a centre
hole which lubricates and cools the cutting tip as well as flushing the
chips out via the flutes of the drill. Haskel air driven liquid pumps
are ideal for pumping the lubricant and are simple and easily installed
in drilling machines.
Hydraulic Friction Clutch Brake
On a mechanical press the flywheel is held by a spring-loaded brake until
a press stroke is initiated. The hydraulic pressure from the control system
overcomes the spring pressure to release the brake and engage the clutch.
A Haskel air driven pump is used to release the brake and in the event
of any loss of air supply, the circuit is designed to fail safe at which
point the brake will be applied.
Grinding Wheel Spraying
To increase grinding wheel life, a Haskel pump can spray grinding wheel
coolant onto the wheel through a nozzle at high pressure.
Work Holding - Power Clamping
Top and bottom die plates are generally secured in a press by hydro-mechanical
clamps located in "Tee" slots on the side and bed plate. Clamping
is achieved by heavy springs closing the clamps with a hydraulic pump
opening them, or by using a pump to close the clamps through an intrinsically
safe circuit. Haskel pumps are widely used for this application because
once the pump has cycled to develop the closing pressure, it will maintain
the pressure indefinitely without further power consumption.
Request Catalogue
|
