GRIPPEX - Bar Puller

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PMDG MD11 Cockpit

             Grippex is a coolant powered bar puller. It is particularly useful for small and middle batch production because there is no need of any adjustment within the whole gripping range, which saves time.

For various reasons, such as high costs or limited floor space in work shops, a small percentage only of the CNC-Lathes are equipped with some kind of magazine-type bar feeder. In small batch production, however, the machine spindle itself, in addition with its inserted guiding tube and Grippex, provides you with a simple and highly efficient Bar-Feeder.


GRIPPEX ADVANTAGES
1)  Instant setup - gripping is secured without any adjustment within the whole gripping range.
2)  Compact and light - Adjacent turret tool positions need not be vacated.
3)  Powerful - stands high pressure. No need for a pressure reduction valve.
4)  Grippex doesn't need high pressure for pulling properly. It's working from 0.5 bar onward. Chuck unclamp.
5)  Clamps very close to the chuck, allowing for short overhang of the bar.
6)  Clamps hexagon bars without need for spindle orientation.
7)  Can be used as well as a Pick-Up Unit with robot jaws.

CYCLE OF THE WORK OF THE GRIPPEX

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Step - 1 Feed Grippex up to end of bar stock Step - 2 Coolant On (M08) - Fingers close around bar stock Step - 3 Retract turret to desired position, pulling bar with it Step - 4 Colant Off (M09) - Fingers open Step - 5 Begin machining next part

PROGRAMMING EXAMPLE:

N95    ......
N100    T0501 / Turret position with Grippex
N110    G00 X0. Z0. / Step - 1 (1)
N115    G01 Z-40. F3.0 / Step - 1 (2)
N120    M08 / Step 2
N125    M25 / Open automatic lathe chuck
N130    Z-10. / Step - 3
N135    M26 / Close automatic lathe chuck
N140    M09 / Step - 4
N145    G00 Z10. /departure of the turret with Grippex (1)
N150    X200. Z200. /departure of the turret with Grippex (2)
N155    T0201 / Step - 5
N160    ......



PULLING FORCE GRAPH

The graph shows the max. allowable weight of a mild steel bar to be pulled at a coefficient valued <0,2


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Grippex-Mini
  with two fingersKup Teraz
Kup Teraz
Grippex-Small
with three fingersKup Teraz
Kup Teraz
Grippex-Large
with three fingersKup Teraz
Kup Teraz


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