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6. Working with the electro-hydraulic punching device
6.1 Description of punching process
The punching process is marked by the retraction of the stamp into the die. The metal sheet to be processed is between the punch and the die. To
initiate the punching process it is mandatory to screw the punch up to the sheet until they contact each other, among other things this ensures that the
entire hub is available for the punching process.
After triggering the operation switch, the stamp punches the sheet metal to be processed by punching through the sheet while the body moves away
from the metal sheet through the stroke of the action. This movement can be optically followed through the pressure ring.
A stamping process is complete if the stamp and die are driven into each other. At this point, the control switch must be released to prevent possible
damages to the stamp or the die. Subsequently, the stamp can be pulled out of the sheet.
A shutdown is automatically activated by the microprocessor if the sheet metal thickness is > 1,0 mm. For thinner sheets and synthetic materials (e. g.
plastics) the automatic shutdown is not always guaranteed and the operator must turn off the power manually.
The pressure relief valve is released during a punching process as soon as the maximum force has been exceeded, which results in the immediate
cancellation of the punching process.
By a single operation of the reset slide (item 2), the pressure ring returns independently to its starting position. After the sheet residue has been
removed from the die, further punching operations can be performed.
6.2 Individual operating steps
First, prepare the matching punch (stamp and die).
Caution: Only use original häwa components, as pirate or unfamiliar components can lead to material failure which may cause injuries to
persons in the direct vicinity.
Determine the exact location of the hole. Drill a hole of about 1-1.5 mm larger than the tension bolt into the metal sheet.
Caution: When drilling and punching always wear goggles for safety.
Caution: Do not punch with an incomplete screwed thread.
If for example, the thread of the stamp can not be fully screwed on to the tension bolts, the assembly must then be disassembled and the bushes
removed. Ensure that the cutting side of the stamp is turned towards the metal sheet.
Caution: The stamp must be screwed as such that there is slight contact with the metal sheet.
Caution: When mounting the tension bolt for square punches, only the inside diameter of the pressure rings‘ adapted side, may be screwed to the
tension bolt.
Failure to observe the aforementioned, leads to the pressure ring sliding onto the bolt, thus becomes jammed and can not be retracted.
This faulty operation damages the pressure ring and must subsequently be replaced.
The punching operation follows as described under heading 6.1. To better understand the processes and functions of the device,
it is strongly recommended to read headings 5.4 and 5.5 carefully.
Caution: Ensure that during the punching process that no other persons are present in the immediate vicinity of the punch, as they may get injured
in case of material failure by flying splinters.
Caution: During the punching process, do not intervene in the punching area with hands, as this can cause severe bruising and contusion injuries.
Caution: The device switches off automatically after the punching process has ended.
To do this, the control switch must be pressed continuously until the cutting process automatically ends.
With metal shee
≤
t thicknessess of 1 mm or with soft materials (e.g. plastics), the operator must release the control switch after the punching process.
Caution: The device may not be operated again directly after a punch/switch off process, as contact between the stamp and
die may follow. This can lead to fraction of the punched hole and people can get hurt by flying splitter.
The stamp and the die must be dismantled and metal residue removed.
Caution: The punching process can be interrupted at any time by releasing the control switch.
Caution: Before a tool change it is imperative that the operator removes the battery from the device, as to safegaurd against unintentional operation.
