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Патент USA US3085545

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April 15, 1963
c. M. KÓWALSKI
3,085,531
EJEcTIoN MEANS FOR DRAW PRESSES
Filed July l5, 1959
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April 16, 1963
c. M. KoWALsKl
EJECTION MEANS FOR DRAW PRESSES
3,085,531
April 16, 1963
c. M. KowALsKl
3,085,531
EJECTION MEANS FOR DRAW PRESSES
Filed July 15, 1959 ‘
47
5 Sheets-Sheet 5
52
4.9
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AUnited States Patent O nice
3,9%,531
Patented Apr. 16, 1963
2
ing the Áshaping members one toward the other with stock
3,085,531
EJECTHON MEANS ‘EUR DRAW PRESSES
Chester M. Kowalski, Livonia, Mich., assignor to Lyon
Incorporated, Detroit, Mich., a corporation of Deia
Ware
Filed duly 15, 1959, Ser. No. 827,237
4 Claims. (Cl. 113-50)
therebetween to form a part while simultaneously sever
ing the part from the deflected stock end, and advancing
the severed stock toward the part to contact the body of
the part intermediate its height with the deiiected end of
the stock to eject the par-t from between the shaping mem
bers.
Other objects and advantages of the invention Will be
come more apparent during the course of the vfollowing
The present invention relates broadly to the art of
metal shaping, and is more particularly concerned with 10 description, particularly when taken in connection with
the accompanying drawings.
novel means for ejecting parts from draw presses and the
In the drawings, wherein like numerals designate like
like and which features accurately guiding stock to a
parts
throughout the same:
die and in a position relative to a part being formed
FIGURE l isa side elevational view yof ejection means
therein whereby when part formation has been accom
constructed in accordance with the principles of this in
pli-shed the shaped article is «automatically ejected from
vention in association -With an exemplary form of die ap
between the mating die surfaces.
paratus, shown with parts thereof in section and in the
It `is an important aim of the present invention to pro
vide means for ready attachment to a draw press or the
like and which incorporates Itherein stock engaging sur
closed position;
FIGURE 2 -is a view of »the same general character
as FlGURE 1, and with the shaping surfaces of the die
faces arranged with respect to one another to locate one 20
-assembly in an open position to show the deflected end of
the stock in a position for ejection of the formed parts;
FIGURE 3 is an end elevational view of the guiding
and ejection mea-ns; and
FIGURE 4 is a top plan View of the means of FIG
Another object of this invention lies in the provision 25
URE
3.
of metal shaping apparatus 4and which embodies mating
During the course of the description now to follow
forming means and a shearing surface adjacent thereto,
reference will frequently be made to use of the instant
and means guiding continuous metal stock with one end
invention in the production of automotive wheel covers.
thereof flexed into an elevated position, whereby as the
While the invention is shown and described in this environ
30
forming means is actuated the continuous stock is severed
ment by reason of the particularly successful results ob
by the shearing means to provide an elevated end por
tained Itherefrom in the ejection of wheel structures, it will
tion on the stock in ready position for -advancement toward
be appreciated that the invention is not so limited and
the formed part to remove the same from the forming
those well versed in the metal shaping art will immediately
portion of the stock in adjacent and spaced relation rela
tive to a pair of die surfaces, whereby after part forma
tion by the surfaces `the part is contacted by the spaced
stock portion and ejected from between the die surfaces.
means.
of additional applications therefor.
Another object of the instant invention is to provide 35 conceive
Referring now lfirst to FIGURES l and 2, there is
stock feed ejection means requiring no manual attention
shown stock feed ejection means generally designated by
on the part of the operator for effective results, and which
the numeral 210 in association with a draw press or die
is readily adjustable for use with die members of varying
apparatus designated in its entirety at 11. The die ap
contours -in the production of a wide variety iof sheet 40 paratus 11 may comprise a stationary mounting base 12
metal articles.
having a pocket or recess 13 formed therein receiving a
A further object of -this invention llies in the provision
die support members 14 and which mounts stationary
of ejection means for formed metal parts utilizing the
shaping members 15 and 16. Movable relative to the sup
stock 'to be formed as the ejection force, and which es
base 12 and die members =15 and 16 erected
sentially entirely eliminates any hand removal ‘of the 45 porting
thereon is a pair of shaping means 17 and 118 contoured
formed part »and prevents damage thereto of the char
along their lower faces for mating contact with the up
acter encountered when the formed parts must be re
per surfaces of the die members 15 and 16 to produce
moved by tools and like devices.
a wheel cover blank 19 of the configuration shown. The
A further object of Ithe invention is to provide ejection
apparatus for formed metal parts and which features sup 50 upper die member 17 may be seen to have formed thereon
an annular bead 20 which produces a draw ring in co
port means for attachment to forming apparatus adjacent
operation
with an annular recess 21 in movable die por
the shaping surfaces thereof, and .a plurality of stock
tion 22 which travels downwardlyV with die portion 23
guiding surfaces |on the support mean-s, one of the guid
during `formation of the wheel cover blank 19.
ing surfaces being disposed above .the other and being posi
Movable with the upper die members 17 and 18 and
tioned relatively more closely one to the other at their 55
abutting therea'gainst is a die portion 24 having a cylin
dischange ends than at their stock receiving ends to clamp
drical bore Z5 therein receiving a spring 26 resiliently
ingly engage the stock at the discharge ends and provide an
acting against a head 27 on plunger shank 2,8. The
entrant mouth at their receiving ends, the leading edge
plunger
shank 28 is slidable within a bore 29 in a shear
of the stock at the discharge ends of the guiding surfaces
being thereby spaced between the shaping surfaces out 60 ing collar 30, which may be seen to be provided with
a downwardly extending shearing surface 31 which acts
wardly lthereof when said surfaces are in the lopen posi
against surface 32. on a cooperating lower shear mem
tion, whereby the leading edge of the stock contacts the
ber 33 to sever the part to be formed from stock S
formed part between the shaping surfaces upon adv-ance
essentially immediately after the annular bead 2li on die
ment of the stock to eject said part from between the shap
member 17 ma‘kes contact with the stock to be shaped
ing surfaces.
65 and located within the die cavity defined by the de
A still further ‘object of this invention lies in the pro
scribed shaping members. As Will be described more
vision of a method of ejecting formed par-ts from be
fully in connection with a later description of the steps
tween shaping members, which comprises advancing a
of the instant method, the plunger member 28 functions
continuous length of sheet metal stock along an inclined
path toward the shaping members while applying a flex 70 to hold the advancing end of the stock S against upper
surface 34 of the die member 33 as the severed length
ing force to said stock to deflect one end thereof to a
of stock is being shaped in the die assembly 11.
position generally in horizontal alignment with a formed
The stock feed ejection means 10 is mounted by the
part as produced by action `of the shaping members, mov
3
3,085,531
die assembly 1.1` at a location thereon `to assure that the
leading end of the stock S will be positioned relative to
the formed part 119 essentially as shown in FIGURE 2.
By `this invention the leading end of the stock is ele
vated or flexed to a raised position above the surface
34 of the shearing member 33 so that as the stock ad
vances forwardly, subsequent to forming the part as
shown in FIGURE 2, a radially outwardly extending
face of the guide member 51 is generally parallel with
the spacer blocks 43 and 44 and with the horizontal
portion 37 of each supporting flange 35 and 36.
It may now »be seen that during continuous operation
of the stock feed ejection means 10 and die assembly
11 stock enters the ejection device 10 through the en
trant mouth 53 between the stock receiving ends 48a,
49a and 51a of the longitudinally extending guide mem
segment 19a of `the cover 19 will be contacted by the
bers 48, 49 and S1. By provision of the tapered surface
stock leading marginal edge at a point along the seg l0 51e on the Aguide member 51 the stock is effectively
ment 19a between crest 1% and base 19e of said seg
aligned with the relatively shallow path between the
ment 19a. Preferably, the leading marginal edge of the
downstream portions of the named guide members. The
stock S will strike the segment 19a generally midway
stock thereby follows an upwardly inclined path provided
of its height to eject the formed part 19 from between
by the inclined guide members 48 and 49 and the hori
the shaping surfaces of the die assembly 11. Thereby, 15 zontal member 51. Upon passing beyond the point at
the earlier ditiîculty of the leading edge of the stock
which the tapered surface 51e on the central `guide mem
traveling beneath marginal flange 19d of the wheel cover
ber 51 terminates, the stock S is subjected to a gradually
and interrupting the forming operation is avoided.
increasing longitudinal and transverse deflection to ulti
To accomplish the novel ejecting action briefly de
mately place leading end S-1 of the stock in an elevated
scribed, the stock feed ejection means 1G preferably com 20 tensioned position spaced upwardly from the surface
prises a pair of spaced support members 35 and 36 (FIG~
34 of t-he shearing member 33 and generally horizontally
URE 3) which may take the `form of shaped flanges of
aligned with an intermediate point on the segment 19a
generally right angular conñguration and each having a
of the formed cover 19, as shown in FIGURE 2.
horizontal portion 37 connecting with a vertical por
More specifically, as the stock S continues its travel
tion 38. The flange vertical portion 33 of each support 25 in the ejection means 10 and is passing in sliding contact
member is attached to the die assembly 11 along an
with the guide members 48, 49 and 51 generally in the
outer wall 12a of the supporting base 12 by bolt means
region of the transverse supports 41, 42, 45 and 46, the
or the like 39. The horizontal mounting portion 37
stock is tensioned transversely by forces exerted by the
of each support member may be seen `from FIGURES 1
-guide members 48, 49 and 51 through their relative close
and 2 to lie generally horizontally flush with upper sur
ness in a horizontal plane. Simultaneously, the stock
face 12b of the die base 12.
is directed in an inclined direction in sliding clamping
Attached by bolt means or the like 40 (FIGURE 3)
contact with the downstream surfaces of the guide mem
to the horizontal portion 37 of each support flange 3:3'
bers and is flexed transversely to locate the leading
and 36 is a first or lower pair of spaced supporting bars
end S-l upwardly yfrom. the normal `longitudinal axis of
41 and 42 extending transversely or crosswise of the di
the stock and upwardly from the horizontal plane de~
rection of travel of the stock S. At opposite ends of
fined by the ñange horizontal portion 37 and the spacing
each support bar 41 and 42 is mounted a spacer block
blocks 43 and 44. As is appreciated, the longitudinal
43 and 44 and extending thereacross upon their upper
flexing of the stock as shown in FIGURE 3 is some
surfaces is a second or upper pair of support bars 45
what exaggerated for purposes of a better understand
40
and 46. The support bars «45 and 46 are generally in
ing of the invention, and in actual practice the longitu
vertical alignment with the lower bars 41 and 42, and
dinal arching caused by transverse flexing of the stock
the attaching means for the upper pair of bars 45 and
may not be quite as great as that illustrated. However,
.the important object attained by this invention is to de
iiect the leading end S-1 of the stock transversely and
upwardly from its normal longitudinal axis while clamp
ingly holding the leading end in a ready and elevated
position for advancement into contact with a point along
46 may take the form of screw or bolt means 47 pass
ing through the support bars 45 and 46 and through the
spacer blocks 43 and 44 into the lower pair of support
bars 41 and 42.
Mounted by each lower support bar 41 and 42 is a
pair of transversely spaced lower guide members 48 and
49 preferably provided by metal rod stock. Each lower
i
the segment
19a of the wheel cover 19.
It may thus be seen from FIGURES l and 3 that the
guide member .48 and 49 is of round cross-section and is 50 guide members 48 and 49 are inclined in a horizontal
direction with their entrant ends 48a and 49a relatively
attached to each lower support member 41 and 42 ‘by
screw means or the like 50 which further provide a varia
ble vertical adjustment along the length of the guide mem
lower than the discharge ends 48!) and 49b, and that the
is within a plane extending
l center guide member 51
across the upper surfaces of the guide rods 48 and 49
bers 48 and 49, whereby said members can be located
tangentially thereto.
in an inclined plane with their stock receiving ends 48a
During operation of the die assembly 11 and advance
and 49a relatively lower than their stock delivery ends
4812 and 49b.
ment forwardly of the stock S `by suitable feed means,
a predetermined length of stock is located between the
Secured to the lower surfaces of the upper support
lower die shaping surfaces 15, 16 and 22 and the upper
bars 45 and 46 and transversely spaced from the guide
members 48 and 49 is a guide member 51. The guide 60 die members 17 and 18. The die members are then
advanced toward one another and the annular bead 20
member 51 may be mounted by the support rods 45 and
46 through the use of screw means 52, and the guide
means 51 may be vertically adjustable in a horizontal
plane to vary the flexing force `on the stock S, as will be
later described. As shown in FIGURE 2, stock receiv
ing end 51a of the guide member 51 is tapered as at
51e along a portion of its length, and thereby a wedge
on `the die member 17 first contacts the stock to restrain
the same against outward movement from between the
shaping surfaces, and essentially immediately thereafter
the shearing surface 31 strikes the shearing surface 32
to sever the stock to be shaped from the continuous
stock length passing through the ejection mechanism 10.
During movement of the die members one toward the
shaped entrant mouth 53 is provided with the upper sur
other the severed and leading end S-«1 of the stock is
faces of the guide members 4S and 49 to facilitate di«
rection of the stock S into and through the stock feed 70 firmly held in a down position against the surface 34
of the shear member 33 by the plunger shank 28 resili
ejection means 10. The stock delivery end 51b may be
seen in FIGURE 3 to be of round cross-section as con
trasted with the tapered stock receiving end 51a, and it
may be noted in FIGURES l and 2 that the upper sur
ently slidable in the shearing collar 30. After shaping
of the work piece by the die members to essentially the
coniiguration of the part 19, the die members are sepa
rated and the part 19 is disposed relative thereto cssential~
:3,085,531
=
6
' 5
ly as shown in FIGURE 2. Continued and automatic ad
vancement of the stock through the ejection means with
the leading end S-l of the stock elevated as shown and
the pair of guide rods and secured to the second pair of
bar lmembers to extend longitudinally between said ñrst
and second pair of bar members, the end of said one guide
described causes said leading end to contact or strike
rod adjacent the shaping die horizontally overlapping the
generally midway of the »cover segment 19a to drive the Ul ends of said pair of guide rods adjacent the shaping die
cover downstream or out from between the shaping dies.
Vwhile being transversely spaced therefrom, whereby the
The process then continues as described.
leading end of the stock is deflected longitudinally and
It may now be seen that applicant has provided a
transversely arched to horizontally align said end inter
novel ejection process wherein the stock to be shaped
performs the ejection function without reliance upon
knockout ‘devices or related means.
The apparatus dis
closed is continuous and automatic and in normal cir
cumstances requires no manual attention on the part of
the operator. Hand removal of the formed part is elimi
nated land thereby the likelihood of workmen injuries
is removed.
Damage to the formed parts as often oc
casioned when prying tools are used for part removal
is similarly eliminated, and it may further be seen
that the instant apparatus is readily adjustable to properly
mediate the height of the formed part for contact there
with upon longitudinal advance-ment of the stock to eject
the formed part `from the shaping die.
3. In apparatus `for ejecting a wheel cover formed from
relatively ñat stock in a shaping die, said stock having
leading and trailing ends, the improvement of support
means secured to the shaping die and having a horizontal
portion extending outwardly therefrom, a hrst pair of
longitudinally spaced transversely extending bar mem
bers attached to the support means, spacer means at op
posite ends of the bar members, a second pair of longi
elevate the leading end of the stock to any desired height.
tudinally spaced transversely extending bar members se
Means for this purpose may comprise shims S5 (FIG
cured to the spacer means and thereby vertically spaced
URE 2) preferably located between the guide members
from the first pair of lbar members, a pair of transversely
48 and 49 and the attaching means 50 therefor. On
spaced and longitudinally extending tguide rods attached
the other hand, it may frequently be found that the ad
to the first pair of bar members `and horizontally inclined
justing means 50 provides suitable variation in vertical 25 with respect thereto, and a guide rod transversely spaced
adjustments of the guide members 48 and 49 so that the
from the pair of guide rods and secured to the second
shims 55 would not be required.
pair of bar members to extend longitudinally between
As mentioned earlier, the use of the invention in con
said first and secon-d pair of bar members, the end of said
nection with the forming of wheel covers in the first
one guide rod adjacent the shaping die horizontally over
draw blank form indicated at 19` in FIGURES 1 and 2
lapping the ends of said pair of guide rods `adjacent the
is illustrative only, and the instant apparatus can well be
shaping die while being transversely spaced therefrom,
employed for Iejection of other formed parts. In addi
whereby the leading end of the stock is deflected longi
tion, various other changes and modifications can be
tudinally and transversely arched to horizontally align
made to the structures herein disclosed without depart
said end intermediate the height of the .formed wheel
ing from the novel concepts of the present invention.
cover for contact therewith upon longitudinal advance
I claim as my invention:
1. In apparatus for ejecting a metal part formed from
relatively flat stock in a shaping die, the improvement
of a pair of transversely spaced and horizontally inclined
rod members -mounted by the shaping die and providing
guiding surfaces for contact wit-h the lower surface of the
stock ‘during advancement therealong, said stock having
ment of the stock to eject the wheel cover from the shaping
ldie, the other end of said single guide rod being tapered
to provide an entrant mouth of general wedge shape .in
side elevation to guide the stock therebetween and along
the guide rods.
4. In apparatus yfor ejecting a metal part formed from
relatively flat stock in a shaping die, said stock having
leading and trailing ends, and a single rod member trans
leading and trailing ends, the improvement of a plurality
versely spaced -from and between the horizontally inclined
of transversely spaced first and second bar members sup
rod members and having a vdischarge end lying with a 45 yported by said shaping die, said first bar members being
horizontal plane passing through the inclined rod mem
horizontally inclined and providing guiding surfaces for
bers to exert flexing forces against the leading end of the
contact with the lower sur-face of the stock during advance
stock when passing between said single rod member and
ment therealong, said second bar member being spaced
said inclined rod members, whereby the leading end of
between said dirst bar members Iand having a ‘discharge end
the stock is longitudinally deflected and transversely 50 lying within a horizontal plane passing through the in
arched to horizontally align said leading end with the
clined bar members to exert ñexing forces against the
for-med metal part for contact therewith upon continued
leading end of the stock when passing between said first
`:advancement o-f the stock.
and second bar members, whereby the leading end of the
2. In apparatus for ejecting ‘a metal part formed from
stock is longitudinally deliected and transversely arched to
55
'relatively flat stock in a shaping die, said stock having
horizontally align said leading end with the formed metal
leading and trailing ends, the improvement of support
means secured to the shaping die ‘and having a horizontal
portion extending outwardly therefrom, a first pair of
longitudinally spaced transversely extending bar members
attached to the support means, spacer means at opposite 60
ends of the bar members, a second pair of longitudinally
spaced transversely extending bar members secured to the
spacer means and thereby vertically spaced from the first
pair of bar members, Ia pair of transversely spaced and
longitudinally extending guide rods attached to the s'irst 65
pair of bar members and horizontally inclined with re
spect thereto, yand a guide rod transversely spaced ‘from
part for contact therewith upon continued advancement
of the stock.
References Cited in the ñle of this patent
UNITED STATES PATENTS
1,284,803
1,874,068
2,157,228
2,444,463
2,489,507
2,679,8'16
Smith et al ____________ __ Nov. l2, 1918
Walker ______________ __ Aug. 30, 1932
lBuccicone etal _________ __ May 9, 1939
Nordquist _____________ __ July 6, 1948
Shapiro et al __________ __ Nov. 29, 1949
Moore ________________ __ June 1, 1954
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