Ejectors
Push |
After
each stroke the ejectors push the parts out of the dies into the transfer
grippers. These are genuine cam-controlled ejectors, not just spring-loaded
plates or pins. So there's usually no need to taper the dies. The
stroke and position is set quickly and easily with set screws on the
ejector lever. |
Every
die has its own ejector |
Each
die has its own ejector. Which means the tool designer doesn't have
to cut corners in laying out the tooling. Each station can be designed
the way it really ought to be. And if a different timing pattern is
needed. For example, the cams can be
replaced for combination forging without taking out the camshaft. |
Self-adjusting
Brakes |
Self-adjusting
brakes slow down the return stroke of the ejector rods. It takes a
certain amount of pressure to push them back to the retracted position.
This means the forgings are held positively between punch and ejector
as they slip into the dies, making lopsided entry impossible. |
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THE
FOUR EJECTOR LEVERS AND CAMS. BELOW THE SPRINGS YOU SEE THE SET
SCREWS FOR ADJUSTING THE END-OF-STROKE POSITION.
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OPTIONAL:
Cam-controlled punch ejectors |
Punch
ejectors are required for all jobs where the forgings tend to stick
to the punches because friction between the part and punch is greater
than that between part and die. This may happen where a part requires
deep bore pre-forming, for instance, or where multi-stepped holes
or parts with pronounced collars or shoulders are being produced. |
Cam-Controlled |
The
patented actuation system permits the adjustment of ejector timing
individually for each job -- independently of ram motion. Setting
is quick and easy because the setting cams are graduated the same
way as the timing diagram.
The ejector levers in this case, too, are protected against overload
by stretch bolts and limit switches. |
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PATENTED
EJECTOR CONTROL SYSTEM: THE ENTIRE MECHANISM RIDES ON THE RAM AND
THE CAMSHAFT IS ACTUATED BY THE PITMAN. THE SETTING CAMS ARE GRADUATED
IN ACCORDANCE WITH THE TIMING DIAGRAM.
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