OMERA I003203, Руководство по эксплуатации и обслуживанию

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OIL-HYDRAULIC PRESSES WITH TWO UPRIGHTS
OPERATION AND MAINTENANCE MANUAL 25
6.7 DEVICE FOR HOLDING THE SLIDE AT T.D.C.
The oil-hydraulic presses with two uprights are equipped with an automatic slide holding device, capable of
physically blocking the downstroke of the slide by means of its own weight when the machine is not activated;
moreover a limit switch de-activates the control of the downstroke if the slide is locked at T.D.C.
DANGER: Any operation other than the loading / unloading of pieces carried out inside the danger
zone of the press should only be carried out after the slide holding device has been
activated and the main pump has been stopped.
NOTE : To set the various press devices for operation, refer to the programming manual of the
INDUSTRIAL PC.
6.8 KNOCKOUT
The knockout is made up of an oil-hydraulic cylinder fitted inside the slide cylinder. The operation of this device
is controlled by the INDUSTRIAL PC.
The main function of this device is to ensure the automatic removal of the drawn piece from the upper part of the
die during slide upstroke.
DANGER: The knockout must be used in such a way as to avoid that the piece removal can cause
injuries to the operator due the fall of the drawn piece onto the lower die or to the
downstroke movement of the knockout device.
On request, it can also be used as a cushion with “THIRD EFFECT” after adequate modifications have been
made. During press operation (drawing), the knockout cylinder exercises a certain counter force that can be set
using the specific knockout oil-hydraulic controls. During upstroke, this device operates to remove the drawn
piece.
In both functioning modes, the downstroke of the knockout cylinder can be operated only if the slide is
positioned at the T.D.C. using the button on the main control console.
After this operation, the cylinder is in the correct position to start the first work cycle.