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Патент USA US3033073

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May 8, 1962
w. A. EHLERT
I 3,033,063
FORGING CONTROL
Filed Nov. 14, 1955
4 Sheets-Sheet 1
INVENTOR.
w/L LIAM A.f/‘/L£RT
BY
ATTORNEY-5.
May 8, 1962
w. A. EHLERT
3,033,063
FORGING CONTROL
Filed Nov. 14, 1955
4 Sheets-Sheet 2
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INVENTOR.
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May 8, 1962
w. A. EHLERT
3,033,063
FORGING CONTROL
Filed Nov. 14, 1955
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May 8, 1962
w. A. EHLERT
3,033,063
FORGING CONTROL
Filed Nov. 14, 1955
4 Sheets-Sheet 4
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INVEN TOR.
WILLIAM A. EHLEIZT
_BY
’
Mam
ATTORNEYS
United States Patent 0
C6
1
3,033,063
FORGING CONTROL
William A. Ehlert, South Euclid, Ohio, assignor to The
Ajax Manufacturing Company, Euclid, Ohio, :1 corpora
tion of Ohio
Filed Nov. 14, 1955, Ser. No. 546,656
2 Claims. (Cl. 80-26)
This invention relates as indicated to a novel forging
machine control, and more particularly to a device for
automatically tripping roll forging machines and the like
when the stock has been properly positioned therein.
3,033,063
Patented May 8, 1962.
2
will not require any especial skill in its use or adjustment
from one pass to the next.
A further object is to provide such control means
which is adapted to be actuated by the tongs gripping
the blank.
Still another object is to provide such control means
which is adapted to be installed on conventional roll
forging machines already in use.
‘Other objects of the invention will appear as the de
scription proceeds.
To the accomplishment of the foregoing and related
ends, said invention then comprises the features herein~
after fully described and particularly pointed out in the
claims, the following description and the annexed draw
ing setting forth in detail certain illustrative embodiments
Roll forging machines are commonly used in the forg
ing of axles and the like, and include two opposed rolls
having dies thereon adapted to cooperate in the forging 15
of a heated metal blank. Such machines utilize a large
of the invention, these being indicative, however, of but
power driven ?ywheel and clutch and brake mechanism
a few of the various ways in which the principle of the
operated in timed sequence to drive such rolls through a
invention may be employed.
single cycle of operation when actuated. In many such
In said annexed drawing:
machines the brake may be released and the clutch en
' FIG. 1 is a front elevational view of a typical roll
gaged through manual operation of a control valve, a
forging machine having my new control means installed
timer or other non-repeat mechanism being provided
thereon;
automatically to disengage the clutch and apply the brake
1 FIG. 2 is a vertical section through the rolls and dies
to stop rotation of the rolls at the end of one cycle of
of such machine illustrating the manner in which the
revolution. It is, however, highly desirable, in order to 25 stock is adapted to be positioned therebetween;
obtain uniform forgings, that means be provided for
PEG. 3 is a semi-diagrammatic plan of a generally
automatically initiating actuation of the machine when
conventional fluid pressure system for actuating the clutch
the blank has been properly positioned therein, thereby
and brake of the machine;
eliminating variations which arise when the actuation of
FIG. 3a is a diagrammatic illustration of such system
the machine depends entirely upon the individual judg 30 in the complete operative combination of the machine;
ment of the operator. Moreover, by providing such
FIG. 4 is a vertical section through the rolls and stock
automatic control means, the forging operation may be
control means of a forging machine employing ‘another
considerably accelerated, less care being required on the
modi?cation of my invention;
part of the operator and the machine being immediately
FIG. 4A is a fragmentary top plan view of the stock
actuated as soon as the work-piece is in proper position.
Devices have been proposed for this general purpose
35 control means shown in FIG. 4 with the tongs and stock
removed for clarity of illustration; and
FIG. 5 is a fragmentary front elevational view‘ of the
gagement by the blank itself when the latter is introduced
tong support and control means of FIG. 4.
into the machine. Such devices have suffered from sev
Referring now more particularly to said drawing, the
eral serious defects principally arising from the lack of 40 usual
roll forging machine may comprise two massive
uniformity in such blanks. Thus, one blank may be cut
main side frame members 1 and 2 having vertically re
slightly longer than another blank, although supposedly
ciprocable slide members 3 and 4 mounted therein. An
of the same dimensions, or one blank may have been
upper forging roll 5 is journalled in said slide members
heated to a somewhat higher temperature than another
and an opposed lower forging roll 6 is journalled in the
blank, thereby relatively elongating the same. Usually 45 main
frame members 1 and 2 therebelow. Such upper
the‘ most important part of the blank where uniformity is
and
lower
forging rolls carry forging die members 7 and
desired is the shoulder produced by the forging dies
8 respectively. Conventional drive means including a
toward the tong-held end of the blank. Due to the roll
large ?ywheel, brake and clutch may be provided for
ing action of the dies, when the blank is reduced or
driving such rolls in synchronism.
necked thereby, the end portion of the blank away from 50 _ Slide 4 is supported by vertical adjusting screws 9 and
the tongs gripping the same will be considerably length
10 and is held down by nuts 11, 12, 13 and 14 threaded
ened. This introduces another source of non-uniformity.
on the upper ends of vertical posts 15 and 16. Slide 3 is
when the blank itself is utilized to trip the machine and
similarly supported. Tie rods 17 and 18 and spacers 19
wherein the control means is actuated or tripped by en
a number of passes are involved. Thus, when the stock
and 20 connect the upper portions of side frame mem
is transferred to the next succeeding pass, it will have 55 bers 1 1and 2 which are also joined at their bases, not
become relatively elongated and the control means must
shown.
.
be‘ designed to compensate for this fact. Since the de
As best shown in FIG. 1 of the drawing, I provide a
gree of elongation is never exactly uniform, however, it
tong rest, in this instance for four passes, comprising a
is readily apparent that the partially forged blank will
support 21 bridging main side frame members 1 and 2
not be reliably located relative to the next pair of forg 60 at the front of the machine and carrying tong rests 22,
ing dies when the control means actuating the machine
23, 24 and 25 thereon having longitudinally extending
is tripped.
-grooves such as 26 therein. The usual tongs compris
It is accordingly a principal object of my invention to
ing a pair of elongated handles 27 ‘and 28 pivotally con
provide a forging machine control adapted automatically
nected at 29 includes work-gripping jaws 30‘ and 3-1 hav
to actuate the machine when a blank has been properly 65 ing square shoulders 32 adapted to rest ‘in such grooves
positioned therein.
26 so that the tongs may be slid therealong to insert
the heated blank B in proper position between the forging
A further object is to provide such control whereby
rolls 5 and 6.
exact register of the blank may be quickly obtained in
Support 21 also carries a transversely extending stop
each succeeding pass while at the same time actuating the
70 member 33, and openings 34 are provided in theends of
drive mechanism without loss of time.
the grooves in the tong rests adjacent such stop member
Another object is to provide such control means which
so that the upper ends of pivotally mounted trigger levers
3,033,063
3
35, 36, 37 and 38 may protrude therethrough as shown
in FIGS, 1 and 2. Inasmuch as each of these triggers is
similarly connected with rock shaft 39 journalled in sup
porting‘frame 2.1, only the mechanism thus associated with
trigger lever 38 and illustrated in FIG. 2 will be described
in detail. _ The lower end of lever 38 engages an adjustable
stop 40 threadedly adjustably mounted on axially recip
4
likewise being shown in the forementioned Patent No.
2,496,040. My invention relates particularly to the as
sociated control means for automatically actuating the
same when‘the operator has properly positioned the blank
between the forging rolls.
When there are a number of passes as shown in FIG.
1 of the drawing, the operator will now shift or roll the
tongs into the next V~groove and will slide the shoulder
rocable rod 41 slidably mounted in transversely extending
32 therealong until it engages the next trigger lever 36
portions 42 and 43 of support 21. A compression spring
whereupon the machine will again be automatically ac
44 is interposed between transverse portion 43 and nut 10 tuated as described. Of course, the end of the blank B
45 on rod 41 tending to urge such rod to the left as viewed
will be properly seated and gripped between the jaws 30
in FIG. 2. The degree of reciprocation of such rod in
and 31 of the tongs so that the relationship between the
this direction is limited by pivotal movement of the upper
blank and tongs shoulder 32 remains unchanged from one
end of trigger lever 38. Spring 44, however, need not be
unduly strong and need only afford a limited degree of 15 pass to the next. In view of the direction of rotation of
the forging rolls, the distance between the end of the
reciprocation to rod 41. The outer end of such rod en
blank gripped by the tongs and the near shoulder of the
gages the upper end of lever 46 mounted on rock shaft
reduced portion of the blank as necked by dies 7 and 8
39 for oscillation therewith, and the right-hand end of
will likewise remain substantially unchanged from pass
such rock shaft 39 as viewed in FIG. 1 carries a down
to pass, whereas the remainder of the blank extending
20
wardly extending lever 47 likewise secured thereto for
from such reduced portion to the other end of the blank
oscillation therewith. The end of lever 4-7 engages the
will be progressively lengthened in each operation. It
plunger of pilot valve 48, and it will accordingly be seen
will be seen that no especial skill is required of the opera
that when the shoulder 32 of the tongs engages the upper
tor in obtaining high speed production coupled with the
end of trigger lever 38 to rock the latter against stop 33
necessary accuracy in registering the successive forging
lever 47 will be rocked to reciprocate the plunger of valve 25 operations. Such high speed operation is desirable not
48 to admit air under pressure from supply line 49 to
only to secure maximum productivity of the machine but
line 50.
also to avoid undue cooling of the heated blank between
Since each of the trigger levers 35, 36 and 37 is similar
the successive forging operations.
ly arranged to oscillate rock shaft 39 in the same manner
desired, as when but a single roll forging operation
when engaged by the shoulder of the tongs, pilot valve 30 is If
required prior to a hammer forging operation for ex
48 will be actuated as indicated, causing the one cycle
ample, the rolls may be driven in opposite directions to
drive mechanism of the forging machine to operate. Line
those indicated (or the control means located at the other
50 leads from pilot valve 48 to control valve 51 (see
side of the machine) so that when the machine has been
FIGS. 3 and 3a) which may be of the general type dis
actuated by the shoulder of the tongs in the manner de
closed in Patent No. 2,496,040 to W. W. Criley, for ex 35
scribed, the forged blank will be ejected from the machine
ample. Air pressure from line 50 serves to reciprocate
in the direction away from the tongs, being released by
the valve member of control valve 51 to admit air under
the latter, whereupon another operator may pick up the
pressure to line 52 and to rock lever 53 to move cam fol
roll forged blank for immediate transfer to the forging
lower roller 54 on the end thereof away from the pe
or other machine.
ripheral surface of cam 55 driven with main drive shaft 40 hammer
It will be seen that a machine constructed in accord
56 of the machine. The air under pressure thus admitted
ance with my invention combines a safety feature, in that
to line 52 serves to reciprocate the piston of piston-cylin
such
machine cannot be started until the blank has been
der assembly 57 to release brake 58 mounted on a high
speed drive shaft 5611. Continued movement of the valve
properly positioned, with high speed operation in view
of the fact that the machine is automatically actuated
the moment the blank is in proper position to be forged.
der pressure from the main supply line to conduit 59 lead
While square shouldered tongs have been illustrated, it
ing to an air actuated clutch 60, likewise on the high speed
will also be apparent that variously modi?ed forms of
shaft. As will appear from FIG. 3a, such shaft 56a is
shoulders may be utilized as desired. While the use of
geared to the main shaft 56 and extends through the clutch
tongs
and associated stops has been known in the past for
50
60 to a flywheel F driven by a motor M. Upon such
the purpose of registering work-pieces, I am not aware
release of the brake and actuation of the clutch, the main
of any prior roll forging machine or the like Where such
shaft is thus driven to rotate forging rolls 5 and 6, the
registering action of the tongs serves simultaneously to
latter being shown on the shaft 56 and the former geared
actuate the machine itself.
to such shaft for operation in synchronism. The rolls are
Mechanism of the type described is particularly adapted
rotated in the directions indicated by the arrows on FIG. 65
for use with roll forging machines of the general type dis
2 to engage the blank B and reduce the latter in a region
closed in Criley Patent 2,130,069, for example, but may
intermediate its ends. The rolling action of the dies 7
also be employed with other types of forging machines.
and 8 also serves to move the blank to the right as viewed
Referring now to the modi?cation illustrated in FIGS.
in FIG. 2, with the operator still gripping the tong handles
4,
4A and 5 of the drawing, the forging machine as
60
27 and 28. Shoulder 32 of the tongs is thus moved out
above
described will include an upper forging roll 62 and
of engagement with the upstanding end of the correspond
an opposed lower forging roll 63 adapted to have forging
ing trigger lever so that spring-returned pilot valve 48 is
die members mounted thereon. The conventional drive
permitted to close the connection to line 49 and to con
means including a large flywheel, brake and clutch may
nect line 50 with exhaust line 61. By thus relieving the
be provided as before for driving such rolls in synchro
pressure in line 50, spring return control valve 51 is like
nism.
wise urged to return to starting position as shown in FIG.
The tong rest ordinarily designed for a plurality of roll
3. At this stage of the cycle, however, cam 55 will have
passes comprises a supporting table 64 adapted to bridge
turned to engage cam roller 54 temporarily preventing
between the main side frame members of the machine
rocking of lever 53 until one cycle of the machine has
been completed. When cam 55 has turned far enough to 70 and carrying a plurality of tong rests such as 65, 66 and
67 having longitudinally extending V-grooves such as 68
permit lever 53 to rock back to initial position, clutch 60
in their upper surfaces. Such grooves are aligned with
is ?rst disengaged and brake 58 then applied, stopping
the corresponding passes of the forging rolls. The usual
the rotation of rolls 5 and 6. The clutch and brake means
tongs comprising a pair of elongated handles 69 and 70
briefly described above are, of course, well-known, such
pivotally
connected at 71 includes work gripping jaws 72
75
elements and their operative connection in the machine
member of control valve 51 thereupon also admits air un
3,038,063
5
’
’
‘
1
'
and 73 having square shoulders 74 adapted to rest in
such V-grooves 68 so that the tongs may be slid there
along to insert the heated blank B in proper position be
tween the forging rolls 62 and 63. Due to the size and
cations having now been abandoned in favor of this ap
plication.
Other modes of applying the principle of the inven
tion may be employed, change being made as regards the
details described, provided the features stated in any of
the following claims of the equivalent of such be em
shape of the tong shoulders, the operator may simply
roll the tongs from one V-groove to the next to align the
work with successive passes.
The tong rests such as 65, 66 and 67 are individually
mounted on table 64 for adjustment toward and away
from the forging rolls, their position being determined
by adjusting screws 75, the rests being secured in adjusted
6
456,575 ?led September 16, 1954, both such prior appli
ployed.
I therefore particularly point out and distinctly claim
10 as my invention:
1. In a roll forging machine including a guideway
position by means of screws 76 extending through slots
along which tongs are moved to position a blank gripped
77 in the table. In FIG. 4, the lower shoulder of the
thereby for working in the machine, and a stop for limit
tong is shown abutting the forward stop 78 of the tong
ing such advance of the tongs; control means for initiat
rest, this determining the longitudinal position of blank 15 ing operation of the machine, rockably mounted lever
B relative to the forging roll dies of the corresponding
means projecting into the guideway proximate to such
pass.
stop for engagement and actuation by the tongs, the stop
A lower bridge 79 supports a plurality of slides such
being provided with a recess for retraction of the lever
as 80 adapted to be adjustably positioned and locked in
means therein, resilient means holding the lever means
place by screws 81 extending through slots 82. Pivotally 20 normally in such projecting disposition, and means con
mounted at 83 on each such slide is a lever having an
upper end 84 projecting through an opening in table 64
and a corresponding opening in the tong rest to an extent
permitting engagement thereof by the shoulder of the
necting the lever means with the control means for actua
tion of the latter upon rocking of the former, whereby
the control means initiates operation of the machine auto—
matically in response to ?nal positioning of the tongs
tong as it is slid forward in groove 68. The normal posi 25 in the guideway.
tion of such lever end is shown in dotted line in FIG. 4.
2. In combination a rolling mill comprising a pair of
The lower end 85 of each such lever straddles a hori
cooperating gap rolls, control means to turn said rolls
zontal rod 86 mounted in the downwardly extending
one revolution and stop the roll rotation at the end of
?ange of table 64 and in downturned ?ange 87 of bridge
each revolution, a horizontally disposed blank feeding
79 for axial reciprocation. A compression spring 88 en 30 table mounted on the mill in alignment with said rolls
circles rod 86 and is interposed between ?ange 87 and
with one edge of the table terminating at the juncture
adjusting nuts 89, serving normally to shift rod 86 to
between the rolls, said table having a horizontally con
the left as viewed in FIG. 4 to the extent permitted by
tinuous groove to guide a blank being advanced to the
stop 90. The lower end 85 of the aforesaid lever en
rolls by the operator along a horizontal path normal to
gages nuts 91 adjustably threaded on rod 86 but nor 35 the vertical plane of the roll axes, a movable trip project
mally exerts no pressure thereagainst when the upper
ing upwardly with respect .to the blank feeding table op
end 84 of such lever is in the indicated dotted line posi
eratively connected to said control means, said trip being
tion. When, however, the tong is slid along V-groove 68
disposed in the bottom of said groove and being normally
until it engages stop 78, it is apparent that the shoulder
urged upwardly into said groove, tong means to grip the
of such tong will ?rst engage the upper end 84 of the 40 end of a blank :to be rolled and transfer the blank to the
lever and rock the same in the manner shown in FIG. 4
groove in said blank feeding table, said tong means hav
to reciprocate rod 86 to the right. The right-hand end
ing a generally square lug ?xed thereto and proportioned
of each rod 86 engages a corresponding lever arm 92
so that one corner of the lug projects downwardly there
keyed to a rock shaft 93. A depending lever arm 94
from into the groove with the blank in feeding position
is keyed to one end of such shaft to actuate the ?uid 45 whereby said lug corner engages said trip ‘as the ‘blank
pressure control means in the same manner as lever 47
described above.
Bridge or table 64 is supported on the main side frame
members of the press such as 95 by means of brackets
such as 96 having vertically extending slots 97 through 50
which the attaching bolts 98 and 99 extend.
It is ac
cordingly possible to adjust the entire tong rest assembly
vertically as may be desired.
Inasmuch as the upper end 84 of the trigger lever is
adapted to be retracted into the slot or clearance in the 55
stop face, it is apparent that such stop will itself absorb
all the shock of impact of the tong. Moreover, the nut
engaged by the other end of such lever may be adjusted
so that the control means will be actuated only by rock
is being advanced by the operator into position to be
rolled and said trip is moved by the corner of the lug
on the tong means to vactuate said control means and set
the rolls in motion.
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,123,460
1,293,836
Adams _______________ __ Jan. 5, 1915
McGrath _____________ __ Feb. 11, 1919
1,708,440
1,733,936
Car-hart ______________ __ Apr. 9, 1929
Boughton ____________ .._ Oct. 29, 1929
1,791,187
2,136,023
Brauchler ____________ __ Feb. 3, 1931
Russell ______________ __ Nov. 8, 1938
2,615,355
Osborn ______________ __ May 29,
Tuttle ________________ __ Apr. 6,
Hruby _______________ .._ June 13,
Friedman ____________ _._ Oct. 28,
ing of the lever to bring its upper end substantially ?ush 60 2,377,032
with the tong engaging stop face.
2,439,323
This application is a continuation-in-part of my prior
2,511,506
co-pending application Serial No. 356,950 ?led May 25,
1953, and of my prior co-pending application Serial No.
1945
1948
1950
1952
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