Nitto Kohki AO-5575, Instruction Manual

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14
MAGNET
MOTOR
push
push
Fig. 27 Fig. 28
(11) Removing Slug
Don’t proceed to the next operation without
removing the slug from the operation just finished.
At the end of drilling operation slug will pop out
automatically ejected by the spring-operated Pilot
Pin. Should a slug left in the hold sticking, remove
it from the hole by tapping the collar of the slug
with a needle stick or something. (Fig.29)
Pilot Pin
Slug (Chips)
Cutter
Slug
Flange part
Thin punch
Fig. 29
6-3. Drilling Oblong Hole
CAUTION
Always drill oblong hole slowly.
Drill oblong hole in the order of ① , ② , ③ . For the
steps ② and ③ , take care so that the cutter may not
be fed into the workpiece with too much force.
Spacing between each step of drilling operations
should be so arranged that the Pilot Pin will always
hit the material yet to be machined. (Fig.30)
File away any e x cesses
Fig. 30
6-4. Drilling Stacked Plates
CAUTION
●
Remove slug as each plated is finished:
otherwise, being blocked by the slug left
unremoved, the cutter cannot cut into the next
layer of plate, which results in the Magnet base
being pushed up possibly causing accident.
●
For stacked plates drilling, always feed and
drill slowly and carefully.
●
Before drilling stacked plates, securely clamp
the plates together in place.
●
When drilling stacked plates, retract the cutter
as each layer of plate is finished in order to
remove slug from the drilling area, then put
another hole in the next layer of plate.