Working With The Electro-Hydraulic Punching Device; Description Of The Punching Process; Individual Operating Steps - hawa Powerlec Vario Manuel D'utilisation

6. Working with the electro-hydraulic punching device

6.1 Description of the punching processes
The punching process is marked by the retraction of the stamp into the die. The metal sheet to be processed is positioned 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, providing thereby that the entire stroke is
available for the punching process.
After triggering the operation switch, the punch will be drawn into the sheet and the body will simultaneously move away from the metal sheet up to the
corresponding stroke length. This movement can be optically followed through the pressure ring.
The punching process is completed if the punch has completely penetrated into the die. At this point, release the control switch to prevent possible
damages to the punch or die. Subsequently, the punch 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 soft 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 retract slide (item 2), the pressure ring returns independently to its starting position. After the scraps have been removed from
the die, further punching operations can be performed.

6.2 Individual operating steps

First, prepare the matching punch set (punch and die) for the intended application.
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 which is approx. 1-1.5 mm larger than the outside diameter of the used draw stud.
Caution: When drilling and punching always wear goggles for safety.
Caution: Do not punch with an incomplete screwed threads.
If for example, the thread of the punch cannot be fully screwed onto the draw stud, disassemble the set-up, remove the spacer and reassemble the set-up.
Please ensure that the cutting side of the punch is turned towards the metal sheet.
Caution: The punch must be screwed on the draw studs until punch and sheet contact each other.
Caution: When assembling draw studs for square punches, only the inside diameter of the pressure ring's adapted side, may be screwed to the draw 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 it 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 may 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 sheet thicknesses ≤ 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 punch and die may follow. This
can lead to fraction of the punched hole and people can get hurt by flying splitter.
Disassemble the punch and die and remove the remaining scraps.
Caution: The punching process can be interrupted at any time by releasing the control switch.
Caution: Prior to a tool change, it is imperative that the operator removes the battery from the device, as to safeguard against unintentional operation.
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