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the outer diameter (∅ 13 mm) of the punch
guide (10) kept touching the template.
Make sure the clamp bolt (11) is tightened pro-
perly.
Sharpening and replacement of matrix
ATTENTION!
Never cut using a blunt plunger (12)!
Especially when cutting a metal sheet of higher
rigidity, it could easily lead to its damage and
devaluation. In addition, a blunt plunger and
matrix increase the strain of the machine mecha-
nism and may be the cause of its damage.
Plunger and matrix sharpening
Plunger
After cutting 40 metres, grinding is recommended.
Blunting the plunger (12) depends on the rigidity
and thickness of the material cut. Serviceability
of plunger (12) (including regrinding) when
cutting sheet steel of:
400 MPa rigidity is ca 200 – 300 m
600 MPa rigidity is ca 50 – 70 m
A sharp plunger (12) has an opaque cutting edge.
Shining cutting edge of a plunger demonstrates
blunting, and the plunger needs to be grinded.
Be very careful when grinding a plunger (12).
Plunger is grinded from the front side whilst
being cooled at the same time. The front surface
needs to stay perpendicular to the plunger axis
after grinding. The cutting edge of the plunger
can then be easily stoned on an oiled hone.
Minimum plunge length after regrinding can be
68 mm, any shorter should be replaced for a
new one.
Matrix
Also matrix (9) needs to have a sharp cutting
edge. Do not regrind matrix, but replace it for a
new one after it gets blunt. Serviceability of
matrix depends on the cut sheet metal – ca
100 – 300 m.
Let a skilled professional do the grinding!
Plunge dismantling and mounting
Screw the clamp bolt (11) out for approx. 4 turns.
Pull the tool head (9, 10) from the gearbox (2).
Screw the plunge (12) out from the connecting
hinge (13).
An edgy or newly replaced plunge (12) whose
conducting and surface surfaces with the beam
(17) are spread with a lubricant grease contain-
ing Molyka (e.g. ÖMV signum LM, Mobiltemp78,
Klüber Unimoly S6 or PZOP oil, which is added
��
with 3% of Molyka FF), stall be screwed in the
connecting hinge (13) to the backstop which
makes putting the tool head easier. Screw out
the plunge (12) with the tool head on by one to
two turns.
Center the tool head and fix it using a clamp bolt
(11). Using a screwdriver inserted in the eccen-
tric spindle groove (14) crank the spindle whilst
checking the plunger immersion (12) into the
matrix (9). The depth of immersion should be
0.5 – 1.5 mm. In the top dead centre the punch
(12) must not stick out from the guide of the
punch (10). If the immersion depth does not cor-
respond, screw the plunge (12) in or out with the
entire tool head after unscrewing the clamp bolt
(11) by 1 turn. Then tighten the clamp bolt (11).
After a short cutting tighten the clamp bolt again.
Matrix dismantling
Pull the cover ring (15) out of the groove up-
wards. Knock the cylindrical pin (16) out, draw
the matrix (9) down the beam (17) and place a
new one.
ATTENTION!
When ordering a new matrix (9) also a peg (16)
and a cover ring (15) need to be ordered.
Beam dismantling
Screw the clamp bolt (11) out for approx. 4 turns.
Pull the tool head out of the gearbox (2), eject
the cover ring (15) from the groove, knock the
cylindrical pin (16) out, draw the matrix (9) down
the beam (17), knock the peg (19) out and pull
the bushing guide (18) out of the plunge guide (10).
Proceed in reverse to perform mounting.
After a short cutting tighten the clamp bolt again.
Fastening the tool head
A complete tool head consists of parts 10, 17, 18,
19 and a complete mounted matrix (9, 15, 16),
and is fastened with a clamp bolt in the gear part.
This bolt (11) is recommended to be replaced
for a new one after multiple screwing in and out
(plunge grinding), otherwise the thread in the
gear part (2) may be damaged due to constant
draw-up. In threads of new clamp bolt (11) there
is a dry drop of locking glue which prevents the
bolt from loosening, once the bolt (11) is screwed
in the gear part (2). After the bolt is repeatedly
(approx. 5times) screwed in and out, the effi-
ciency of the glue decreases, and it is recom-
mended to replace the bolt for a new one.
Clamp bolt (11), together with beam (17) are
secondarily fast-expendable parts.
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