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Патент USA US2404611

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~J11!ly23,.1946.
BDASHBAUGH
,
I
I
2,404,611
BOOSTER RAM ADJUSTMENT I
~ Filed March 9, i945
"18~
36
24
INVENTQOR
2
BY
58
‘
‘.
"ATTORNEY
_
f
Patented July 23, 1946
2,404,611 .
UNITED STATES
PATENT OFFICE
2,404,611
BOOSTER RAM ADJUSTMENT
Bernard D. Ashbaugh, Mount Gilead, Ohio, as
signor to H-P-M Development Corporation,
Wilmington, Del., a corporation of Delaware
Application March 9, 1945, Serial No. 581,827
7 Claims. (01. 60--97)
1
This invention relates to ?uid operable presses
opposite end which is reciprocable within the cyl
and,‘ particularly, to ?uid operable presses having
inder 26.
a reciprocable main ram and a. booster ram.
'
The cylinder 26 comprises a ?anged member
It is often desired to close the movable platen
adapted for being received within the bed plate
of a press against the ?xed platen at a rapid 5 22 of the press base 24;
The bed plate 22 is
suitably connected with the strain rods I2 and
rate and thereafter to- perform work ‘with it at
a reduced rate. This is often accomplished by
I4 so that a rigid structure results.
7
'
means of a booster ram which is generally ?xed
in the head of the press and extends into a bore
The ram I6 is bored as at 26 and reciprocably
receives a booster ram 28 which is bored'and
in the main pressing plunger. Then, the fast
movement of the platen is accomplished by ad
mitting fluid to the booster area While the re
threaded at 30 for receiving the threaded rod 32
which is rigidly attached to the closed end of
the cylinder 20 by means of the shoulder 34 an
duced speed pressing stroke is accomplished. by
nut
admitting ?uid to both the booster ram and the
36.
y
_
‘
7
The ram 28 is provided with a plurality of axial
main ram.
bores 38 which communicate the bore 30 with the
In order to accommodate for different lengths
of fast travel, means are provided for accomplish
ing the admitting of pressure to the main plunger
at a predetermined point in the travel of the press
platen. This is commonly accomplished by
means of valving operated by the press platen
and operable to interconnect the said areas. The
necessary conduits and valves to accomplish this
upper end of the bore 26. The bore 26 in turn:
is connected by means of a plurality of inverted
L shaped passages 40 with the space :beneath the
piston I8. Fluid communication is thus had at
20 all times between the upper end of the ram 28
I and the bore 30 and, when the ram I6 advances
upwardly a predetermined amount,‘ between the
upper end of the bore 26 and the lower end‘of
the cylinder 20.
The ram 28 is also bored centrally for receiving
a rod 42 which is slidably keyed to the said ram
by a key 44. The rod 32 passes upwardly through
shift-over of pressure are expensive and require
time and labor to install on a press. Further
more, the additional hydraulic connections are
subject to failure and require care and service
to maintain them in good operating condition.
It is a primary object of the present invention
the packing 4‘6 and extends into a recess 48 in
the platen ID. Attached to the upper end of the
to provide in a press having a booster ram a 30 rod 42 within the recess 48 is a ‘bevel gear 50
means of shifting over from the fast closing stroke
to the pressing stroke which does not involve
extra valves.
‘
which is engaged by the bevel gear 52 on' the
inner end of the rod 54. The rod 54 is jo'urnalled
on the spaced bearings 56 and has a hand wheel
.
It is another object to provide an arrangement
58 attached thereto externally of the platen I0.
Fluid communication is had with the upper
side of the piston I8 through the conduit 60
while a check valve 62 is adapted to permit ?uid
according to the foregoing object in which the
length of the fast closing stroke may be adjusted.
It is still another object to provide an arrange
ment according to the foregoing objects in which
to pass from the frame or reservoir 24 into the
the adjusting means for the booster ram is read
lower end‘ of the cylinder 20 through the pas
ily accessible.
'
40
It is still another object to provide a booster
ram and adjustment therefor for an upward act
ing press plunger in which the adjusting means
sage 64.
'
A valve 66 is also connected with the lower
end of the cylinder 20 and is adapted to connect
‘ the cylinder 20 with the reservoir in response
to a predetermined pressure conducted thereto
is readily accessible. 7
These and other objects and advantages will 45 by the conduit 68 which is connected with the
become more apparent upon reference to the ac
companying drawing, in which:
Figure 1 is a vertical section through an up
ward acting press plunger having a booster ram
and adjustment according to this invention;
Figure 2 is a similar view but showing the press
in its closed position; and
Figure 3 is. a plan view taken on the line 3-3
of Figure l and showing a portion of the mech
anism.
.
.
Referring to the drawing, there is shown a
press platen I 0 adapted to slide vertically on the
strain rods I 2 and I4 and having connected there
with the ram I6 which has a piston I8 on its
upper surface Of the piston I8. '
Pressure ?uid is delivered to the booster plunger
through a bore 10 in the threaded member 32
which communicates through a bore ‘I2 with a
50 conduit ‘M.
In operation, pressure ?uid is delivered to the
conduit ‘I4 while the conduit 60 is connected with
exhaust. The fluid from the conduit 14 passes
through the bores 72, ‘I0, 30 and 38 to the upper
55 end of the bore 26 and advances the plunger I6
and platen It rapidly into position where the
members 16 and ‘I8 are about to close. Im
mediately prior to the closing of the said members
the bores 40 communicate with the space above
60 the booster ram and pressure ?uid is delivered to
2,404,611
4
munication between said rams in response to a
_ the lower surface of the piston H3. The ram and
predetermined advancing movement of said main
platen then advance the member 16 against the
member 18 at reduced speed and increased pres
sure.
7
Should the members 76 and 18 be replaced by
other work members having different dimensions,
the hand wheel?lirmay be adjusted so that the.
booster ram 28 is rotated and threads in one"
ram and platen, and means for axially adjusting
said booster ram comprising rotatable shaft
means operatively connected with said booster
T ram and extending through said mainram and
said platen.
5. In combination in a press, a platen, a cylin
direction or the other on the member 32.v This ' der, a main ram reciprocable in said cylinder for
will vary the point of travel of the platen at 10 reciprocating said platen, a bore in said main
which pressure ?uid is delivered to the .main
pressing area and, therefore, vary thelength of
the rapid closing stroke.
'
'
The location of the hand wheel 58 in the platen
I0 is particularly advantageous in that it permits
the operatorv to obesrve the work members in the
press while adjusting the booster ram. Further
more, all external valves and conduits are elimi
nated and the press structure is thereby simpli
?ed and made more economically.
While this invention has been'illustrated' and 7
described in connection with an upward acting
press ram, it will be understood that its utility is
ram, a booster'plunger' reciprocably mounted in
said bore, a threaded bore in said booster ram, a
threaded rod carried by said cylinder and extend;
ing into said threaded bore, means to admit ac
tuating ?uid to said booster ram, passage means
in said main ram‘for effecting ?uid communica
tion between said rams in response to a prede
termined relative movement thereof, and means
for axially adjusting said booster ram for chang
ing the amount of said predetermined relative
movement comprising a shaft extending axially
through said main ram slidably keyed to said
booster ram and a shaft extending transversely
not limited to that type of press but may be em
through said platen and in operative engagement
ployed on a horizontally or vertically acting press I
with said ?rst mentioned shaft.
ram as well. It will be understood that I desire
to comprehendv such modi?cations as may be con
sidered to come within the scope of the appended
6. In combination in an upward acting ?uid
operable press, a press bed, a press cylinder car
ried by said bed, a‘main ram reciprocable in said
cylinder, a platen carried by said main ram, a
bore in the lower end of said main ram, a booster
plunger reciprocably mounted in said bore, a rod
carried by said cylinder and screw threadedly en~>
gaging said booster ram for supporting the same,
passage means in said main ram for effecting
?uid communication between the advancing areas
of said rams in response to a predetermined ad
vancing movement of said platen and main ram,
claims.
~
I
I claim:
1. In combination in a ?uid operable press, a
platen, a main ram attached thereto for recipro
eating the same,_a booster ram for augmenting
the speed of said platen in one direction of move
ment thereof, means of, admitting actuating ?uid ‘
to said booster ram, means responsiVe to a pre
determined relative movement of said rams to
connect said rams hydraulically, and means car
ried by said platen and extending through said
‘
'
means for admitting actuating ' ?uid to said
booster ‘ram comprising passage means in said
main ram and into engagement with said booster 4.0 cylinder, said rod and said booster ram, and
means for axially adjusting :said‘ booster ram rel
ram for adjusting the position thereof relative to
ative to said main ram comprising a ?rst shaft
said main ram.
slidably keyed to said booster ram and‘ extending
2. In combination in a ?uid operable press, a
axially through said ‘main ram and into said
platen, a main ram connected with said platen
for reciprocating the same, a booster ram extend 45 platen», a second shaft geared to said ?rst shaft
and extending laterally outwardly through said
ing into said main ram for augmenting the speed
platen,- and means for rotating‘said' second shaft
of said platen in one direction of movement there
whereby said booster ram may be threaded‘ in
of, means for admitting actuating ?uid to said
either direction on its supporting rod.
.
booster ram, means responsive to a predetermined
'7. In combination in a press, a press platen, a
movement of said main ram and platen for ad 50
main ram attached thereto, a bore in said main
mitting actuating ?uid to said main ram, and
means carried by said vplaten ' and extending
ram'opposite said platen, a booster ram recipro
cablyimounted‘in said bore, a threaded recess in
the end- of said booster ram, a stationary threaded
of said booster‘ ram relative to said main ram.
3. In combination‘ in a ?uid operable press, a 55 rod adapted for engaging said threaded recess
thereby to support said booster ram, means ex
reciprocable platen, a main ram attached'thereto
tending through said rod and booster‘rarn to sup
for reciprocating ,the same, a cylinder within
ply actuating ?uid to said booster ram, passage
which said main ram is reciprocably mounted, a
means in said main ram for effecting ?uid com
booster ram adjustably carried by said cylinder
munication between said rams in response to a .
and extending into said main ram,v means to ad
predetermined relative movement thereof in the '
mit actuating ?uid to said ‘booster ram, passage
advancing direction, and means for rotating said
means in said main ram adapted in response to
booster ram relative to said rod to'e?’ect axial
a predetermined advancing movement of said
shifting of said booster ram- comprising a' ?rst
main ram to effect ?uid communication between
said rams, and means carried by said platen and 65 shaft slidably keyed to said booster ram and ex
through said main ramfor adjusting the position
extending through said'main ram for axially ad
jus'ting said booster ram.
’
‘ '
4. In combination in a ?uid operable press, a
platen, a main ram attached to said platen, a cyl
inder, within which said main ram is reciprocable,
a bore in said main ram opposite said platen, a
booster ram screw threadedly carried by said cyl
inder and extending into said bore, means to ad
mit actuating ?uid to said booster ram, passage
means in said main ram for effecting ?uid com
tending-axially through said main ram and into
said platen, a recess in said, platenfor receiving
the end of said ?rst shaft, a second shaft extend
ing laterally through said platen and into said
0. recess, gear means connecting said shafts and
hand Wheel means connected with the outer end
of said second shaft whereby rotation thereof is
effective to rotate said/booster ram and, there
fore, axially to shift the same.
'
'
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BERNARD D. .ASHBAUGH.v .
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