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Патент USA US2404351

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July 23, 1946. ~
2,404,35 1
H. N. ANDERSON
FORGING PRESS
Filed May 28, 1943
2 Sheets-Shagt l
_._______.._I
INVENTOR.
#42010 M 4NQE/F50N
July 23, '1946.
2,404,351
H. N. ANDERSON
FORGING PRES S
Filed ’May 28, 1943
.2 Sheets-Sheet 2
BY
ATZ'OP/VEKS.
Patented July 23, 1946
- 2,404,351»
A UNITED ‘STATES PATENT/OFFICE
2,404,351‘
FORGING PRESS
Harold N. Anderson, Rocky River, Ohio
Application May 28, 1943, Serial No. 488,806
10 Claims. ( c1. 78—-39)
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of equipment is not adapted for accurate die work. I
This invention relates to improvements in a
The present invention provides means whereby
press of the type used‘ for forging. and drawing
a moving die or hammer may be driven at rela
metals and for similar operations. The improve
tively high speed toward a piece of metal to be ‘
ment relates to the changing of the position of
the moving die generally while the latter is in 5 formed and which is held in a rigidly ?xed coact
ing, die or platen. The stroke of themovingdie
motion and provides a means for varying the
position of the stroke of a reciprocating press
is 'very accurately controlled so that an exact
predetermined amount of work may be done on
while always providing a, positive stroke between
rigidly supported members.
.
.
the metal at‘ any one stroke and yetthe machine
'An object of the present invention is the pro 10 makes use ofthe momentum of the moving die
to perform work. My invention is applicable to
vision, in a machine having a die whose motion
is controlled by a rotating shaft, of means for
machines of this type whether they bevertical,
as illustrated in the accompanying drawings, or
changing the position of the moving die relative
to the cooperating die while the shaft is in ro
horizontal or inclined.
.
h
H
j,
In the drawings I have illustrated my invention
tation.
as applied to a forging press of the vertical type.
Anothero'bject of the present invention is the
provision of novel means for automatically ad
This press comprises a frame I0‘ in the lower por
vancing a moving die toward a cooperating die
tion of which is rigidly ?xed a platen or die II.
In theupper portion of the frame suitably guided
while the moving die is in motion.’
A more speci?c object of the present invention 20 for sliding movement in a vertical direction is
relates to that type of machine in which a die
. the slide or movable platen l2. ‘Suitable dies may
be provided in either or'both of the platens for
is moved by means of a rotating crank and con
producing the desired work in apiece of metal
sists in the changing of position of the crankshaft
by forging or drawing operations or the like, as
in a novel manner so as to vary the approach
25 will be readily understood by those skilled in this
stroke ofthe dies.
1 1
.
.
art. The movement of the platen I2 is provided
My invention also provides a vnovel means for
shifting the position of a shaft by means of GCCGIl-s,
by means of a rotatable shaft I3 which has a
crank throw ‘l4 operatively connectedbyth'e link
or connecting rod l5 which is pivotally-mounted
in the platen [2 at the point 16. It will be under
tric bearings so as to vary the position of .a die
driven from that shaft.
.
, Other improvements found in my present in
vention relate to a speci?c hydraulic means for
carrying‘ out the above named purposes.
Other advantages of my improved vmechanism
will be apparent from the accompanying draw
ings and speci?cation and the essential features 35
will be set forth in‘ the appended claims.
7
stood that wherever I have referred to a “crank
connection” between the rotatable shaft and the
moving platen I intend to include such connec
tions as the Scotch yoke and other similar equiva
alent connections. . The means for rotating shaft
l3 comprises a large gear I‘! rigidly ?xed on or
clutched to shaft I3 and meshing with pinion I8
on jack shaft i9. At its oppositeendthis jack
Fig. 1 is a front elevational view of a forging
press embodying my invention;
shaft carries a combined pulley and ?ywheel 20
Fig. 2 is a side elevation of the same;
‘
40 which has a suitable driving'belt connection 21
Fig. 3 is an enlarged fragmental sectional view
with the pulley 22 of motor 23.
Means is provided for varying the position of
taken along the line 3—3 of Fig. 1;‘
Fig. 4 isa'diagrammatic view illustrating the
the upper end of connecting rod 15 relative to
In the drawings
a
v
>
.
hydraulic system for controlling the parts illus
trated in Figs. 1 to 3;
Figs. 5 and 6 illustrate other positions of one
of the valves shown in Fig. 4; while
the frame In so as to vary the stroke of the platen
45 l2, thus varying the relative approach ofthe
movable platen to the stationary platen II. In
the embodimentsh'own here the shaft l3, as best
Fig. 7 is a detail of a throttling valve shown in
seen in Fig. 3, is mounted in a bearing 24 which
Fig. 4.
One of the disadvantages of forging presses,
is eccentric with respect to the axis of shaft [3.
The bearing 24 is rigidly mounted in a shell 25,
drawing presses and similar metal working ma
chinery in common use today is that they must
which in turn may be mounted in suitable bear
ings 26 in the frame Ill. The construction is the
same in both side portions of the frame‘ [0 and
work at relatively low speeds if accurate die work
is to‘be performed. Obviously this remark does
not apply to high, speed hammers, but this type
the two shells-25, as clearly shown in1Fig.;1, are 55 provided with arms 25a which converge centrally.
2,404,351:
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45 (Fig. 4) moves treadle 4| to the dot-dash line.‘
position, moving valve '33 to the position of Fig.
6 just described.
It will be noted that valve 33 and its connec
and ‘toward the rear of the machine to a common
‘ point 21 where they have a pivot connection with
means for rotating the shells and therefore the
eccentric bearings so as to vary'the position of
shaft l3 relative to the frame I0. As best seen
in Fig.3, I have indicated means for moving the
arms 250. through substantially a 90° angle from
tions with motor 28 have been arranged for use
of an incompressible fluid, such as oil. The pas
sages of the valve are therefore arranged so that
in the position of Fig. 4,7when flow. occurs be
tween conduits 32 and 34 on the intake side, ?uid'
the full line position to the dot-dash position
there indicated, which moves the center of’ shaft
I 3 from' the. upper position marked‘ |3a to the .
exhausting from.motor.28'?ows;frorn conduit 44
lower position marked l3a'.
to conduit 46, which is intended to indicate a flow
back to a tank or reservoir for the pump supply
Preferably power means is utilized for moving
the eccentric hearing as just described. To this 7 __ ing conduit 32. In like manner, when valve 33
end I have mounted a double acting cylinder and '~ is in the position of Fig. 6 ?uid ?ow is directly
piston motor 28 on a trunnion mounting atthe
from conduit 32 to conduit 44 on the intake side
point 29. The piston 30 of this motor is connected
and the return ?ow is from conduit 34 to conduit
by piston rod 3| with the pivot pin at the’ point' ~ ' I 46 back to the tank.
21. A pressure ?uid supply system for motor 25 .
It is believed that the operation of my improved
is provided through conduit 32 which is intended
device will now be apparent. With the parts in
to be a supply from a pump or the like. The sup 20 the full line position of“ Figs. 3‘and 4, the shaft
ply; passes through ‘ four-way valve 33, conduit
I3 is in its uppermost position and the platen
I2 is iniits most remote position with respect to
platen l |_ Controlrbutton 41 or, some similar con
trol rneansris now operated to start motor 23. An
pIa'ténJZ occurs on‘ldownward movement’of the 25 abutment type of air clutch (not shown) in the
later approaching platen | l, and the non-working
drive from motor v23 to shaft I3 is then engaged;
portion'of the stroke is its upper portion. This
This produces rotation of shaft _|3, which, by the
34,? valve 35,‘; conduit 36, ‘valve 31 and conduit ‘38 ‘
to’
' Obviously
the upper’thew’orking
end of the portion
motorcylinderl;
of the stroke'of
non-working portion?‘ occurs “partly on_ the up
stroke and partly on the downstroke.‘ Thejwork
ing portion of the stroke‘ occurs when the, platen
I72 “strikes the work resting on platen ||. lVIeans
is‘ provided 'for "opening valve‘ 31 automatically
during the non-working portionof ‘the stroke and
for closing the valve during the'working- portion
crank connection l4,’ causes '’ repeated’ vertical
strokes of platen Y |2._ If an v-article to be worked
uponis held betweenthe eoacting platens a stroke
of vpredetermined length will produce a predeter
minedramount of work on the article until some
change in eccentric bearing 24’ occurs. If the op- .
of thestrokea ‘Such a means'is here shown-‘oom
orator depresses the foot piece 42 to the fullline
position of Fig. 4, ?uid is supplied through valves
gages 21-pin '39 carried by the platen I2. ' On_ the
up stroke of platen l2, as best seen'in Fig.p4, the
Since this occurs when the loadis removed from
the moving platenit is notjvery dif?cult to rotate
theeccentric bearing. _At, each upward movement
prising an arm 3_Ta:for rotating valve‘31, this'arm
having an open slot‘31b in its free end which en-'
33. 35 and 31 at eachgupward stroke Of platen I2.
valve is carried to open position as shown in full
lines.‘ On the downstroke of platen 12 the valve
is carried to closed position,'as shown’ in dot-dash
lines."‘Y-“”"'T“?
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‘
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of platen’ l2 a. shot of pressure ?uid is supplied
abovev'piston '30, causing intermittent downward
movement‘ of the same, which carries with it the
arms. 25a soas to gradually rotate the eccentric
'W
V The valve 35 is to control’ the rate of (flow
bearing 24 to the dot-dash position of Fig. 3. _ .{Ifhe
through'~"conduits '34 and :36‘to valve 31 when it
amount of each of these successivemovementsor
is' open,; Any suitable/valve may beusedfo'itthis
the amount of the shot of. ?uid'suppliedateach
operation of .valve 31 dependlsruponlthejnsetting
purpose. but as here' indicated I have shownaro
tatable cock having a IV-shaped port 35a ‘extend
of the control valve 35 as willreadily appear. The
ing through the center thereof, so that'when the
operator may maintain the foot piece‘z42 in the
apex of theport begins to open a very nicecontrol to fully depressed position indicated at ‘full lines
of thea'mount of ?uid ?owing is provided.
‘
in Fig. 4 as long avs'vhe desires the platen l2 tobe '
The valve 33 is under 'controlof the operator
and to this end I have'shown an arm 33a for ro
‘tating the valve connected by link 40 with'treadle
movedcloser to, the platen II on each stroke. If
at any time he desires two or more strokes with
4| which extendsto the front of the machine -
where it is provided with a foot-piece 42, '- The
valve 33 has three positions as shown in Figs. 4,
5 and 6. The position shown in Fig. 4 ‘corresponds
to the full line position of treadle 4 IV and supplies
pressure’ fluid. as already described to the upper
end of motor 28. Thesecond position of the valve
shown in Fig. 515a neutral position which cuts
01? the supply of ?uid in either direction. This
second position corresponds to the broken; line
position- of treadle 4| in Fig. 4 and- a ‘heavy spring
43 is providedw'at this point so as to warn the
operator upon further‘ depression of the foot piece
.42. ' The third position of valve 33 is' illustrated
out further relative approach between". the two’
platens he simply decreases the pressure on the
foot piece 42 until spring 43 moves to‘ its un
stressed position vindicated in Fig. 4, whereupon
the treadle is inthe brokenlineeposition there
shown andythe valve 33 is inthe neutral position
60 of Fig. 5.
In_this position of the parts n0 move- .
ment of piston .30 occurs. Upon completion of the
work upon the article the operatorremoves his
foot permitting treadle 4| to move tothe ‘dot
dash position of Fig. 4 and placing valve-33’ in
the position of Fig. 6. This supplies?uid'b‘eneath
piston 30 andrreturns the arms 25a to‘ their‘up
permost position and turns the eccentric ‘bearing
24 to the position indicated in full lines in'Figs. a
in
6. This'cuts off the supply of fluid ‘from
conduit'32to conduit 34 as previously. described 70 3 and 4.‘ The parts‘ are then in the position for ‘
operating upon another article. " " '
Y
a
and provides‘ a'?ow from conduit 32 through
The valve 33 might be arranged to'supply’?uid
conduit 44 to'the lower end of moto'r'28fo17 oper
ating‘piston 3|] in the opposite direction,v ‘This
directly from conduit 32 to conduit3|i in the neu
tralposition shown in Fig. 5. butotherwaysiof re;
third’ position of valve '33 occurs whenv pressure is i
v spring '75 moving ‘pressurefrom the pump are-we'll’ known;
removed from the 'foot piece 42, whereupon
2,404,351
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matically acting 'uponlrelease of said-r control
such as a spring-loaded by-pass direct from th
i
means by said operator to produce-retrograde
It will be noted from Fig. 2 that the relation
ship between gear I1 and pinion I8 is such as to
,movement of said movable platen relative'to said
permit the downward movement of gear l1 along
4. In, a press of the'type comprisinga pair‘of
coacting platens at least one'of which is movable
relative to the other in a stroke movement,'a ro
tatable' ‘shaft, a drive connection between said
movable platen and said shaft, a bearing for "said
pump discharge to the supply tank.
'
2“
'
coacting
with shaft I3 in the manner just described with
out seriously interfering with the suitable mesh;
ing of the teeth of the gear and ‘pinion. Other
means are available for accommodating‘ this
platen.
.
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downward movement of shaft l3,- but the‘ same m shaft'eccentric of the latter, cylinder and piston,
forms no part of the present invention.
J
motor ‘means having an operative connection‘with
-
said bearing for rotating the latter, a pressure
?uid supply for operating said motor in ‘a direc;
tion to vary the eccentricity of said bearing in a
times with means‘for varying the position vof
platen 12 relative to platen I I while theimachine 15 manner‘ to produce-closer'vrelative approach move
It will be seenfrom the above description that
I have provided rigid support for platen l2 at all
is operating and shaft‘ l3'fis rotating;_' The‘ change
of the stroke of platen l.2']is always deflniteand
is under the control of the operator. 'He'may ‘pro
duce a small or large increment of approach be
tween the coacting platens at each’ stroke of the 20
movable platen and he may stop such approach
movement or cause retrograde movement between
the platens at any time he desires.
' ‘
My improved device herein disclosed has the
ment of said‘ ‘coacting platens, “a valve vin said
pressure ?uid supply, and means foropeningsaid
valve responsive to a portion of said stroke when
said movable platen is out of engagement with the
work.
"’
"1
5. In a pressof the type comprising a pair of
coacting platens ‘at least one of which is movable
relative to the other in a stroke movement where
in the working portion of the stroke occurs upon.
advantages of a press and of ahammer also. It 25 relative approach of said platens and the non
working portion of the stroke occurs upon rela
is like a press in that the stresses are self-con
tive recession of said platens, a rotatable shaft, a
tained and the amount of deformation of the
drive connection between said movable platen and
metal worked upon is predetermined by the set
said shaft, a bearing for said shaft eccentric of
ting of the dies. In hammer operations there is
no predetermined distance between the dies at 30 the latter, cylinder and piston motor means hav
ing an operative connection with said bearing for '
each stroke, but instead the amount of deforma
rotating the latter, a pressure ?uid supply for op
tion occurring at each stroke of the hammer is
erating said motor in a direction to vary the posi- .
dependent upon the resistance of the work. It
tion of said bearing in a manner to produce closer
‘ has the advantage of a hammer over a press in
that it permits a gradual approach of the dies, 35 relative approach movement of said coacting
platens, a valve in said pressure ?uid supply,
shaping the work by repeated blows, which re?nes
means for opening said valve during the non
the metal and which permits the removal of scale
working portion of the stroke of said movable
platen, and a second valve operator-controlled in
forcing the metal into the sharp corners of the 40 series with said first named valve.
6. In a press of the type comprising a pair of
dies, if there be such.
coasting platens at least one of which is movable
What I claim is:
relative to the other in a stroke movement where
1. In a press of the type comprising a pair of
coacting platens at least one of which is movable 45 in the working portion of the stroke occurs upon
relative approach of said platens and the non
relative to the other in a substantially linear
working portion of the stroke occurs upon relative
stroke movement, a rotatable shaft, an operative
recession of said platens, a rotatable shaft, a
connection between said movable platen and said
drive connection between said movable platen and
shaft including a connection eccentric with said
shaft, and means operable by movement of the 50 said shaft, a bearing for said shaft eccentric of
the latter, double-acting cylinder and piston mo
press for varying the eccentricity of said connec
tor means having an operative connection with
tion relative to said shaft.
said bearing for rotating the latter, a pressure
2. In a press of the type comprising a pair of
?uid supply for operating said motor in a direc
coacting platens at least one of which is movable
tion to vary the position of said bearing in a man
relative to the other in a substantially linear
55 ner to produce closer relative approach movement
stroke movement, a rotatable shaft, an operative
of said coacting platens, a valve in said pressure
connection between said movable platen and said
?uid supply, means for opening said valve during
shaft including a connection eccentric with said
the non-working portion of the stroke of said
shaft, power means for varying the eccentricity
movable platen, and a second valve operator-con
of said connection relative to said shaft, and con
trol means for said power means having an oper
trolled in series with said first named valve, said
second valve having three positions, namely, a
ative connection with said movable platen.
3. In a press of the type comprising a pair of
fluid supply position, a ?uid cut-off position, and
a third position adapted to supply pressure ?uid
coacting platens at least one of which is mov
able relative to the other in a substantially linear 65 for operating said motor in the opposite direction
for producing rotation of said eccentric bearing
stroke movement, a rotatable shaft, an operative
in a manner to provide retrograde movement of
connection between said movable platen and said
said movable platen relative to said coacting
shaft including a connection eccentric with said
platen.
shaft, power means for varying the eccentricity
'7. In a press of the type described, a frame, a
of said connection relative to said shaft, and op-. 70
relatively ?xed platen, a crankshaft,‘ a movable
erator-operable control means for causing said
platen carried thereby in position to coact with
power means to vary the eccentricity of said con
between blows. My improved device is able to;
duplicate the higher momentum of the hammer,
nection in a manner to produce closer relative ap
proach movement of said coacting platens, said
control means being provided with means auto
said ?xed platen, said frame having spaced rigid
members, axially alined bearings equally eccentric
75 with respect to said shaft and supporting the lat
2,404,351
7
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ter. in said frame members,-.and means for simul
taneously rotating said bearings to vary the dis
stroke when said movable platen'is out of engageg
tance between said’ platens.
"
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8. In a press of the type comprising a
‘
pair’ of
ment with the work, vand a second control mem
ber, connected with said power source in series
with said ?rst: named controlmember and ad
justable to vary "the amount of powerrsupplied
upon movement of- said ?rst named control mem
coacting platens at least one of which is movable
relative to the other in a stroke movement, a ro
her to power supply position.
.
tatable shaft, an operative connection between
10. In a press of the type comprising a pair of
said movable platen andsaid shaft, power means
coacting platens at least one ofwhich is movable
for varying the relative approach movement of
said coacting platens, a power source for said 10 relative to the other in a stroke movement, a ro
power means,’ a control ‘member _for said source,
means for moving said control member to power
supply position responsive to a portion of said
stroke when said movable platen is. out of en
gagement with the work, and a second operator
operable c'ontrol 'member ‘connected with said
power source in series with said ?rst named con
trolmember.
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tatable shaft, an'operative connection between
said movable platen and :said shaft, power means
for varying the relative approach movementsof
said‘coacting platens, arpower, source‘for said
15. power means, a controlmemberfor said source,
means for moving said-control member to power
supplyv position responsive toga portion of said
, stroke when said movable platen is out of [engage
9. In a press of the type comprising a pair ofco
acting platens at least one of which is movable
relative to the other in a stroke movement, a ro
tatable shaft, an operative connection between
said movable platen and said shaft, power means
ment with the work, and a second operator-oper
able, control member connected with said power
power means, a control member for said source,
erate the latter in a manner to produce retro
means for ‘moving said control member to power
supply position responsive, to a portion of said
grade movement of said movable platen relative
source in series with, said ?rst named control
member, said second control member having three
positions, namely, a power supply position; a
power cut-off position, and‘a third position for
for varying the relative approach movement of
said coacting platens, a power source for said 25 connecting said source to said power means torop
to said coacting platen.
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HAROLD’ N; ANDERSON. '
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