OMERA I003203, Руководство по эксплуатации и обслуживанию

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OIL-HYDRAULIC PRESSES WITH TWO UPRIGHTS
OPERATION AND MAINTENANCE MANUAL 8
3.2 DESCRIPTION OF THE MACHINE
The "OPI" oil-hydraulic presses with two uprights are composed of the following parts:
Structure: made of welded sheet metal, in thickness required for maximum rigidity.
Before being machined, the structure undergoes heat treatment and sand-
blasting in order to eliminate residual internal stress.
The machine has a monolithic structure.
Slide: made of welded steel plate which has undergone heat treatment.
The guide action is provided by eight lubricating sliding blocks equipped with a
device for the take-up of play.
The lower surface has T-shaped milled grooves to accommodate the dies.
Table: made of extra-thick steel to prevent bending, it has T-shaped milled grooves
and holes to accommodate the blank-holder pressure pins.
Cylinder: made of steel, in single-piece casting, internally ground and lapped.
Piston: made of ground and tempered steel.
The piston is guided by special bronze bushes.
The piston is sealed by means of a series of gaskets.
Blank holder cushion: with oil-hydraulic operation, is made up of one steel cylinder fitted under the
table fastened to the press.
The blank-holder table slides on ground and hardened steel columns.
The force of the blank holder can be adjusted.
Oil-hydraulic unit: mounted on the machine top and includes: an oil tank, variable delivery piston
pump with constant power regulator and driven by an electric motor; filling and
quick exhaust valve with wide port; down-stroke control blocks and safety
devices using logical elements.
In addition, the motor pump unit for the low pressure auxiliary circuit is used to
pilot the valves and cool the oil.
Cycle cams the intervention sequence of the solenoid valves which control the slide and
blank holder is governed by a programmable electronic device which detects
the position of the two mobile elements by means of a wire encoder.
Electric control panel built in compliance with current accident-prevention regulations and contains
all the electrical equipment for the operation, control and protection of the
machine as well as the safety of the operator.
All the components in the electrical and oil-hydraulic systems are supplied by
top-quality brands, guaranteeing their reliability and availability in the event of
replacement.
Control and adjustments: the machine is equipped with a hanging push-button board which contains the
start and motor stop buttons, with corresponding indicating lights, and the
selector for choosing the press work cycle (adjustment cycle or single cycle).
The different machine devices are operated using the INDUSTRIAL PC.
Moreover indicators are fitted to signal the main causes of malfunctioning.
The control console which accommodates the slide and blank holder up/down
movement push buttons is located on the front part of the machine.