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September, 1925
New Acme Forging Machine
To meet the increasing demand in the forging industry
for forging and upsetting machines capable
of handling the greatest stresses and performance now
demanded of them, the Acme Machinery Company
has developed an all steel new improved heavy duty
upsetting and forging machine.
The bed is a one-piece box type, steel casting
strengthened by heavy deep longitudinal and transverse
trusses or ribs. The new tie plate, covering and
reinforcing movable die slide ways on the 3-in. and
larger machines, completes the rugged box construction
and produces a bed, capable of withstanding any
demand that may be made on the machine.
The crank shaft is a high grade special steel heat
treated forging and has been further strengthened by
increased sizes of diameters and cheeks. It is made
with one double disc crank for operating the header
slide, and one cam for operating the toggle slide or
die closing mechanism. A new type cam has been
developed with a profile which produces a very smooth
operating movement.
The main cluth gear is of web construction for
strength which also eliminates the necessity for unsightly
guard over the whole gear. It is made of a
high grade steel casting, with machine cut teeth, and
is fitted with clutch hub. There are two clutch pockets
in the gear wheel so that the operator has two opportunities
for engaging the clutch in every revolution
of the gear wheel. The clutch gear hub is provided
with a removable bronze bushing of ample proportions.
The machines are fitted with a driving fly wheel
keyed to one end of the driving pinion shaft and is
provided with a friction slip relief safety device
which will relieve the machine of excess strain or pressure
in case the machine should become stalled while
in operation and also protects the motor.
The header slide, Fig. 2, is made of steel and is of
massive proportions. A new feature of suspending
this slide on long wide bronze bearing surfaces in
recesses on top of the bed, eliminates any possibility
of dirt, scale and water coming in contact with these
surfaces, thus maintaining the accurate alignment of
the header slide necessary to produce accurate work.
The long wide side surfaces of the header slide operate
against ground plates accurately fitted into the ways
of the bed. The bearing for the pitman is of one large
diameter and continuous across the full width of the
header slide. The pitman is made of steel, the slide
end having an integral pin the same diameter as the
hub which gives a continuous bearing of one diameter
from end to end of the pin.
Forging - Sf amping - Heaf Treating
The movable die slide, Fig. 3, is made of steel and
has the same suspended type slide features as the
header slide. It is provided with long wide bearing
surfaces faced with bronze wearing strips. The side
wearing plates are accurately ground and fitted into
place. The rear view of the movable die slide, Fig. 4,
shows the long large diameter bronze bushings which
carries the ends of the toggles in place. Fig. 1 shows
movable die slide ways and wearing plates in the bed,
and also the planed shoulders which receive the heavy
steel cover and reinforcing plate. This construction
is used on all 3-in. machines and larger.
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The toggle slide is of two piece steel construction.
The lower half is carried on large wearing plates operating
in the toggle slide ways of the bed. The top
half carries the relief mechanism together with the
hardened steel rollers on which the cam operates. By
removing six bolts the top half can be removed and
full access had to crank shaft for scraping bearings or
removal. j£r
FIG. 1—Movable die slide ways in bed.
FIG. 2—Header slide and pitman.
FIG. 3—Movable die slide, die side.
These machines are provided with an improved
vertical automatic relief which consists of a strong
spring in a vertical spring case. It is so arranged that
a comparatively slight pressure by the spring exerts a
very great pressure on the gripping dies. Nevertheless,
if anything should get caught between the face
of the dies, causing an excessive pressure on the machine,
this spring will yield and relieve the machine
from all excess pressure.
The machines are also equipped with an improved
automatic friction slip device in the flywheel, which
relieves the machine of excess strain in case of accident.
It is also a safety device for the motor, when
the machine is motor driven.
The single toggle is used on the smaller machines.
Fig. 6, and the double toggle on 3-in. and larger sizes,